<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0378-1844</journal-id>
<journal-title><![CDATA[Interciencia]]></journal-title>
<abbrev-journal-title><![CDATA[INCI]]></abbrev-journal-title>
<issn>0378-1844</issn>
<publisher>
<publisher-name><![CDATA[ASOCIACIÓN INTERCIENCIA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0378-18442006001100007</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Composição florística de Solanaceae e Suas síndromes de Polinização e Dispersão de sementes em florestas Mesófilas Neotropicais]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[Lidiamar B]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vasconcellos-Neto]]></surname>
<given-names><![CDATA[João]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidade Estadual de Campinas  ]]></institution>
<addr-line><![CDATA[Campo Grande ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A02">
<institution><![CDATA[,UNICAMP  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidade de Amsterdam  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2006</year>
</pub-date>
<volume>31</volume>
<numero>11</numero>
<fpage>822</fpage>
<lpage>827</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_arttext&amp;pid=S0378-18442006001100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_abstract&amp;pid=S0378-18442006001100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_pdf&amp;pid=S0378-18442006001100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Em geral, os processos de polinização e dispersão de sementes são fundamentais para entender a colonização e a regeneração dos ecossistemas. Neste trabalho, analisou-se a composição florística e suas síndromes de polinização e dispersão de sementes da família Solanaceae nas florestas mesófilas das regiões equivalentes do México e do Brasil. Partiu-se da premissa que se as florestas são fisionômicamente semelhantes e estão distribuídas em regiões equivalentes, deveriam ter processos funcionais similares. Os resultados mostram as diferenças na composição florística, mas ambas as florestas compartem um número similar de espécies de Solanaceae (México 25 e Brasil 26). No México, verificou-se que a distribuição e a abundância das espécies de Solanaceae estão primeiramente associadas às condições de perturbação e umidade, enquanto que no Brasil, as análises sugerem a altitude ao nível do mar e a umidade. Nas dois regiões constatou-se que a síndrome de polinização dominante é a melitofilia. Entretanto, ao comparar as síndromes de dispersão de sementes, verificou-se que existem diferenças significativas entre essas regiões. Para o México prevalece a ornitocoria, enquanto para o Brasil a quiropterocoria. Isto coincide com os centros de diversificação das aves na América Central e dos quirópteros na América do Sul, o que sugere que houve um processo de coadaptação funcional entre as espécies de solanáceas e as espécies de morcegos e aves dispersoras de sementes em cada região.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In general, it is widely accepted that polination and seed dispersal syndromes are fundamental to understand colonization and regeneration of ecosystems. This paper analyzed the floristic composition of Solanacea and their polination and seed dispersal syndromes of Mountain Cloud Forests from equivalent regions from Mexico and Brazil. It was argued that similar functional processes are to be found at physiognomically similar forests from equivalent regions. Both regions shared a similar number of Solanacea species (Mexico 25 and Brazil 26) but differed drastically in their composition. In Mexico it was found that disturbance and humidity were best correlated with current distribution and abundance patterns, whereas for Brazil elevation and humidity played a most relevant role. In both regions melitophilia was found as the dominant polination syndrome. However, seed dispersal differs since in Mexico Solanaceae are mainly dispersed by birds; whereas bats are the seed dispersal agents in Brazil. These results support the evidence that the diversification center of birds is mainly restricted to Central America, while in South America bats play this role. In short, Solanaceae seem to have coadapted their seed dispersal syndromes to the available bird and bat dispersers in each region.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En general, los procesos de polinización y dispersión de semillas son fundamentales para entender la colonización y la regeneración de ecosistemas. En este trabajo se analizó la composición florística y sus síndromes de polinización y dispersión de semillas de la familia Solanaceae en bosques mesófilos de regiones equivalentes de México y Brasil. Se partió de la premisa que bosques fisonómicamente semejantes distribuidos en regiones equivalentes deberían tener procesos funcionales equiparables. Los resultados confirman las diferencias en composición florística pero ambos bosques comparten un número similar de especies de Solaneacea (México 25 y Brasil 26). Para el caso de México se encontró que la distribución y abundancia de Solanaceae está primeramente asociado a las condiciones de perturbación y de humedad, mientras que para el caso de Brasil la distribución y abundancia está preferentemente relacionada a la elevación y la humedad. En ambas regiones se encontró que el síndrome de polinización dominante es la melitofília; sin embargo, al comparar los síndromes de dispersión de semillas se verificó que hay diferencias significativas. Para México prevalece la ornitocoria mientras que para Brasil la quiropterocoria. Esto coincide con los centros de diversificación de aves en Centro América y de quirópteros en Sudamérica, lo que sugiere que las especies de solanáceas han experimentado un proceso de coadapación funcional con respecto a los grupos dispersores de semillas de aves y murciélagos en cada región.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Dispersão de Sementes]]></kwd>
<kwd lng="pt"><![CDATA[Florestas Mesófilas Neotropicais]]></kwd>
<kwd lng="pt"><![CDATA[Florística]]></kwd>
<kwd lng="pt"><![CDATA[Polinização]]></kwd>
<kwd lng="pt"><![CDATA[Solanaceae]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <B>    <P align="center"><font face="Verdana" size="3">COMPOSI&Ccedil;&Atilde;O FLOR&Iacute;STICA DE SOLANACEAE E SUAS S&Iacute;NDROMES DE POLINIZA&Ccedil;&Atilde;O E DISPERS&Atilde;O DE SEMENTES EM FLORESTAS MES&Oacute;FILAS NEOTROPICAIS</font></P> </B>     <P align="center"><font size="2" face="Verdana"><sup>1</sup> Lidiamar B. Albuquerque, <sup>2</sup>Alejandro Vel&aacute;zquez e <sup>3</sup>Jo&atilde;o Vasconcellos-Neto</font></P>     <P align="justify"><font size="2" face="Verdana">1.</font> <font size="2" face="Verdana"> Ph.D. em Ecologia, Universidade Estadual de Campinas (UNICAMP), Brasil. Pesquisadora, Universidade Cat&oacute;lica Dom Bosco, Brasil. Endere&ccedil;o: Rua Moreira Cabral, 321. B. Planalto, Campo Grande, MS, Brasil. CEP: 79.009-150. e-mail. lidiamar98@yahoo.com</font></P>     <P align="justify"><font size="2" face="Verdana">2. Jo&atilde;o Vasconcellos-Neto.</font> <font size="2" face="Verdana"> Ph.D. em Ecologia, UNICAMP, Brasil. Pesquisador, UNICAMP, Brasil. e-mail: jvascont@unicamp.br</font></P>     <P align="justify"><font size="2" face="Verdana">3. Alejandro Vel&aacute;zquez. Ph.D. em Ecologia de Paisagem, Universidade de Amsterdam, Holanda. Pesquisador, Universidad Nacional Aut&oacute;noma de M&eacute;xico (UNAM). e-mail: avmontes@igiris.igeograf.unam.mx</font></P>      <P align="justify"><font size="2" face="Verdana">RESUMO</font></P>      <P align="justify"><font size="2" face="Verdana">Em geral, os processos de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes s&atilde;o fundamentais para entender a coloniza&ccedil;&atilde;o e a regenera&ccedil;&atilde;o dos ecossistemas. Neste trabalho, analisou-se a composi&ccedil;&atilde;o flor&iacute;stica e suas s&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes da fam&iacute;lia Solanaceae nas florestas mes&oacute;filas das regi&otilde;es equivalentes do M&eacute;xico e do Brasil. Partiu-se da premissa que se as florestas s&atilde;o fision&ocirc;micamente semelhantes e est&atilde;o distribu&iacute;das em regi&otilde;es equivalentes, deveriam ter processos funcionais similares. Os resultados mostram as diferen&ccedil;as na composi&ccedil;&atilde;o flor&iacute;stica, mas ambas as florestas compartem um n&uacute;mero similar de esp&eacute;cies de Solanaceae (M&eacute;xico 25 e Brasil 26). No M&eacute;xico, verificou-se que a distribui&ccedil;&atilde;o e a abund&acirc;ncia das esp&eacute;cies de Solanaceae est&atilde;o primeiramente associadas &agrave;s condi&ccedil;&otilde;es de perturba&ccedil;&atilde;o e umidade, enquanto que no Brasil, as an&aacute;lises sugerem a altitude ao n&iacute;vel do mar e a umidade. Nas dois regi&otilde;es constatou-se que a s&iacute;ndrome de poliniza&ccedil;&atilde;o dominante &eacute; a melitofilia. Entretanto, ao comparar as s&iacute;ndromes de dispers&atilde;o de sementes, verificou-se que existem diferen&ccedil;as significativas entre essas regi&otilde;es. Para o M&eacute;xico prevalece a ornitocoria, enquanto para o Brasil a quiropterocoria. Isto coincide com os centros de diversifica&ccedil;&atilde;o das aves na Am&eacute;rica Central e dos quir&oacute;pteros na Am&eacute;rica do Sul, o que sugere que houve um processo de coadapta&ccedil;&atilde;o funcional entre as esp&eacute;cies de solan&aacute;ceas e as esp&eacute;cies de morcegos e aves dispersoras de sementes em cada regi&atilde;o.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">SOLANACEAE COMPOSITION, POLLINATION AND SEED DISPERSAL SYNDROMES IN NEOTROPICAL MOUNTAIN CLOUD FORESTS</font></P> </B>     <P align="justify"><font size="2" face="Verdana">SUMMARY</font></P>      ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">In general, it is widely accepted that polination and seed dispersal syndromes are fundamental to understand colonization and regeneration of ecosystems. This paper analyzed the floristic composition of Solanacea and their polination and seed dispersal syndromes of Mountain Cloud Forests from equivalent regions from Mexico and Brazil. It was argued that similar functional processes are to be found at physiognomically similar forests from equivalent regions. Both regions shared a similar number of Solanacea species (Mexico 25 and Brazil 26) but differed drastically in their composition. In Mexico it was found that disturbance and humidity were best correlated with current distribution and abundance patterns, whereas for Brazil elevation and humidity played a most relevant role. In both regions melitophilia was found as the dominant polination syndrome. However, seed dispersal differs since in Mexico Solanaceae are mainly dispersed by birds; whereas bats are the seed dispersal agents in Brazil. These results support the evidence that the diversification center of birds is mainly restricted to Central America, while in South America bats play this role. In short, Solanaceae seem to have coadapted their seed dispersal syndromes to the available bird and bat dispersers in each region.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">COMPOSICI&Oacute;N FLOR&Iacute;STICA DE SOLANACEAE Y SUS S&Iacute;NDROMES DE POLINIZACI&Oacute;N Y DISPERSI&Oacute;N DE SEMILLAS EN BOSQUES MES&Oacute;FILOS NEOTROPICALES</font></P> </B>     <P align="justify"><font size="2" face="Verdana">RESUMEN</font></P>      <P align="justify"><font size="2" face="Verdana">En general,<B> </B>los procesos de polinizaci&oacute;n y dispersi&oacute;n de semillas son fundamentales para entender la colonizaci&oacute;n y la regeneraci&oacute;n de ecosistemas. En este trabajo se analiz&oacute; la composici&oacute;n flor&iacute;stica y sus s&iacute;ndromes de polinizaci&oacute;n y dispersi&oacute;n de semillas de la familia Solanaceae en bosques mes&oacute;filos de regiones equivalentes de M&eacute;xico y Brasil. Se parti&oacute; de la premisa que bosques fison&oacute;micamente semejantes distribuidos en regiones equivalentes deber&iacute;an tener procesos funcionales equiparables. Los resultados confirman las diferencias en composici&oacute;n flor&iacute;stica pero ambos bosques comparten un n&uacute;mero similar de especies de Solaneacea (M&eacute;xico 25 y Brasil 26). Para el caso de M&eacute;xico se encontr&oacute; que la distribuci&oacute;n y abundancia de Solanaceae est&aacute; primeramente asociado a las condiciones de perturbaci&oacute;n y de humedad, mientras que para el caso de Brasil la distribuci&oacute;n y abundancia est&aacute; preferentemente relacionada a la elevaci&oacute;n y la humedad. En ambas regiones se encontr&oacute; que el s&iacute;ndrome de polinizaci&oacute;n dominante es la melitof&iacute;lia; sin embargo, al comparar los s&iacute;ndromes de dispersi&oacute;n de semillas se verific&oacute; que hay diferencias significativas. Para M&eacute;xico prevalece la ornitocoria mientras que para Brasil la quiropterocoria. Esto coincide con los centros de diversificaci&oacute;n de aves en Centro Am&eacute;rica y de quir&oacute;pteros en Sudam&eacute;rica, lo que sugiere que las especies de solan&aacute;ceas han experimentado un proceso de coadapaci&oacute;n funcional con respecto a los grupos dispersores de semillas de aves y murci&eacute;lagos en cada regi&oacute;n.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">PALAVRAS CHAVE / Dispers&atilde;o de Sementes / Florestas Mes&oacute;filas Neotropicais / Flor&iacute;stica / Poliniza&ccedil;&atilde;o / Solanaceae /</font></P> </B><FONT SIZE=2>    <P align="justify"><font face="Verdana">Recebido: 28/07/2005. Modifi&ccedil;&atilde;o: 13/10/2006. Aceito: 16/10/2006.</font></P> </FONT><I>     <P align="justify">&nbsp;</P> </I>    <P align="justify"><font size="2" face="Verdana">As solan&aacute;ceas t&ecirc;m distribui&ccedil;&atilde;o cosmopolita, com cerca de 90 g&ecirc;neros (Martins e Costa, 1999) e mais de 3500 esp&eacute;cies (D’Arcy, 1986, 1991). Est&atilde;o amplamente distribu&iacute;das nos tr&oacute;picos e regi&otilde;es temperadas, com maior centro de dispers&atilde;o na Austr&aacute;lia e na Am&eacute;rica Latina. O Brasil apresenta cerca de 30% dos g&ecirc;neros (26) e aproximadamente 10% (362) de todas as esp&eacute;cies de Solanaceae do mundo (Barroso, 1991). Na Am&eacute;rica do Sul encontra-se a sua maior diversidade, assim considera-se que esta regi&atilde;o seja o seu prov&aacute;vel centro de origem (Hunziker, 1979).</font></P>     <P align="justify"><font size="2" face="Verdana">A distribui&ccedil;&atilde;o das esp&eacute;cies responde aos fatores clim&aacute;ticos e ed&aacute;ficos e &agrave; disponibilidade de recursos. As intera&ccedil;&otilde;es bi&oacute;ticas e os fatores hist&oacute;ricos, como perturba&ccedil;&atilde;o natural e humana, tamb&eacute;m influenciam os padr&otilde;es de distribui&ccedil;&atilde;o (Motzkin et al., 1999). Na primeira etapa da perturba&ccedil;&atilde;o as esp&eacute;cies estabelecidas t&ecirc;m suas popula&ccedil;&otilde;es reduzidas e/ou segundo Laurence e Bierregard (1997) pode ocorrer &agrave; extin&ccedil;&atilde;o das plantas, tanto atrav&eacute;s de a&ccedil;&otilde;es diretas sobre elas quanto atrav&eacute;s de efeitos indiretos nos polinizadores e/ou nos dispersores de sementes. Essas intera&ccedil;&otilde;es entre planta, polinizador e dispersor s&atilde;o fundamentais na estrutura&ccedil;&atilde;o de comunidades, pois podem influenciar na sua distribui&ccedil;&atilde;o espacial, na riqueza e abund&acirc;ncia de esp&eacute;cies, na estrutura tr&oacute;fica e na fenodin&acirc;mica (Janzen, 1970; Heithaus, 1974; Bawa et al., 1985; Morellato, 1991).</font></P>     <P align="justify"><font size="2" face="Verdana">Muitas esp&eacute;cies de Solanaceae s&atilde;o conhecidas por se distribu&iacute;rem amplamente em &aacute;reas perturbadas, sendo consideradas esp&eacute;cies pioneiras (Bohs, 1994; Silva et al., 1996; Nepstad et al., 1998; Tabarelli et al., 1999). No entanto, ao contr&aacute;rio da maioria das esp&eacute;cies pioneiras apresentam, predominantemente, dispers&atilde;o zooc&oacute;rica, principalmente quiropteroc&oacute;rica e ornitoc&oacute;rica. Outras esp&eacute;cies apresentam restri&ccedil;&otilde;es ecol&oacute;gicas como Solanum inodorum (na Serra do Japi, S&atilde;o Paulo, Brasil) que ocorre acima de 800m (Jo&atilde;o Vasconcellos-Neto, comunica&ccedil;&atilde;o pessoal) e, no M&eacute;xico, Lycianthes monziniana, distribu&iacute;do acima de 2000m em florestas de pino-encino (Nee, 1986; Williams, 1993). Outras esp&eacute;cies apresentam em &aacute;reas restritas como Physalis tehuacanensis e P. queretaroensis (end&ecirc;micas do M&eacute;xico), enquanto outras como S. americanum distribuem-se em praticamente todos os biomas terrestres. Esse fato pode ser atribu&iacute;do &agrave; grande diversidade de esp&eacute;cies e de h&aacute;bitos de vida desse grupo, apresentando desde &aacute;rvores, arbustos, ervas e lianas, &agrave;s vezes semiep&iacute;fitas (Markea e Juanulloa), ou ervas rizom&aacute;ticas, quase acaules (Jaborosa), muitas vezes armadas (Acnistus, Grabowskia e Solanum) ou inermes (Barroso, 1991).</font></P>     ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">Algumas esp&eacute;cies de Solanaceae s&atilde;o de grande import&acirc;ncia na alimenta&ccedil;&atilde;o humana, como Lycopersicon esculetum (tomate), S. tuberosum (batata) e Capsicum spp (pimenta), enquanto outras s&atilde;o ornamentais, como Brugmansia candida, Petunia violacea, S. pseudocapsicum (Gentry e D’Arcy, 1986; Nee, 1986). Sua grande variedade e quantidade de metab&oacute;litos secund&aacute;rios (alcal&oacute;ides, ester&oacute;ides, flavon&oacute;ides, terpenos, etc) s&atilde;o de particular interesse na &aacute;rea m&eacute;dica, farmacol&oacute;gica e toxicol&oacute;gica (Evans, 1986; Roddick, 1986). Recentemente se destacou a sua import&acirc;ncia ecol&oacute;gica como limitante da frugivoria (Cipollini e Levey, 1997a, b, c) e antif&uacute;ngica<B> </B>(Cipollini e Levey, 1997b). Esta fam&iacute;lia tamb&eacute;m tem papel importante como colonizadora de &aacute;reas abertas e perturbadas como pastagens, clareiras,<B> </B>borda de florestas e beira de estradas (Bohs, 1994; Silva et al., 1996; Nepstad et al., 1998; Tabarelli et al., 1999). Essa coloniza&ccedil;&atilde;o depende dos processos de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes (Murray et al., 2000), assim estas intera&ccedil;&otilde;es bi&oacute;ticas, tanto em Solanaceae como em outras fam&iacute;lias, s&atilde;o fundamentais para se entender o funcionamento e, portanto, a regenera&ccedil;&atilde;o dos ecossistemas (Morellato e Leit&atilde;o-Filho, 1992; Gorchov et al., 1993; Reis, 1996; Medell&iacute;n e Gaona, 1999).</font></P>     <P align="justify"><font size="2" face="Verdana">V&aacute;rios grupos de animais alimentam-se preferencialmente de frutos com determinada combina&ccedil;&atilde;o de caracter&iacute;sticas morfol&oacute;gicas, como cor, tamanho, forma, acessibilidade (Janson, 1983; Gautier-Hion et al., 1985). O conjunto dessas caracter&iacute;sticas morfol&oacute;gicas, que varia de acordo com o taxon animal envolvido, foi categorizado por Pijl (1972) como &quot;s&iacute;ndromes de dispers&atilde;o&quot;. Muitas caracter&iacute;sticas dos frutos s&atilde;o interpretadas como evid&ecirc;ncias de coadapta&ccedil;&atilde;o, as quais determinam a escolha por animais. Entre os mais citados est&atilde;o a cor dos frutos (Pijl, 1972; Janson, 1983; Gautier-Hion et al., 1985; Wilson et al., 1989), acessibilidade (Denslow e Moermond, 1982; Moermond e Denslow, 1983), tamanho e peso (Herrera, 1981; Moermond e Denslow, 1983). As caracter&iacute;sticas da s&iacute;ndrome de dispers&atilde;o por morcegos (quiropterocoria) n&atilde;o impedem o consumo secund&aacute;rio dos frutos por aves ou outros frug&iacute;voros.</font></P>     <P align="justify"><font size="2" face="Verdana">Os frutos de Solanaceae s&atilde;o bastante diversificados, apresentam diversos meios de dispers&atilde;o de sementes, com predomin&acirc;ncia de zoocoria em 83% das esp&eacute;cies. Apesar da import&acirc;ncia desta fam&iacute;lia, ainda poucos trabalhos de frugivoria foram feitos. O trabalho cl&aacute;ssico com dispers&atilde;o de sementes em Solanaceae &eacute; o de Symon (1979), na Austr&aacute;lia, que registrou a ocorr&ecirc;ncia de v&aacute;rios meios de dispers&atilde;o para o do g&ecirc;nero Solanum, com 96% das esp&eacute;cies zooc&oacute;ricas.</font></P>     <P align="justify"><font size="2" face="Verdana">De acordo com Terborgh e Robinson (1986), comunidades com fisionomias semelhantes t&ecirc;m espa&ccedil;os funcionais (nichos) semelhantes. Assim, s&atilde;o encontrados muitos equivalentes ecol&oacute;gicos em florestas nas mesmas latitudes, embora em continentes diferentes como Am&eacute;rica Latina e &Aacute;frica. Como as solan&aacute;ceas t&ecirc;m relevante papel ecol&oacute;gico na estrutura&ccedil;&atilde;o de comunidades, este trabalho tem como objetivo analisar a composi&ccedil;&atilde;o de esp&eacute;cies e comparar as s&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes de Solanaceae em duas &aacute;reas de florestas mes&oacute;filas que compartilham condi&ccedil;&otilde;es fisiogr&aacute;ficas, clim&aacute;ticas, ecol&oacute;gicas e graus de perturba&ccedil;&otilde;es semelhantes no M&eacute;xico e no Brasil.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">Regi&otilde;es de Estudo</font></P> </B>     <P align="justify"><font size="2" face="Verdana">Defini&ccedil;&atilde;o das regi&otilde;es equivalentes</font></P>     <P align="justify"><font size="2" face="Verdana">Este estudo foi desenvolvido na regi&atilde;o Neotropical, em duas regi&otilde;es de florestas mes&oacute;filas, uma no hemisf&eacute;rio sul, Serra do Japi, S&atilde;o Paulo, Brasil, e outra no hemisf&eacute;rio norte, Sierra Madre Oriental, Hidalgo, M&eacute;xico, no limite do Neotr&oacute;pico (<a href="#f1">Figura 1</a>). Os crit&eacute;rios para considerar as regi&otilde;es equivalentes foram 1) florestas em que prevalece o clima &uacute;mido e ameno; 2) florestas distribu&iacute;das a dist&acirc;ncias eq&uuml;itativas do meridiano equatorial; para tal transformou-se a diferen&ccedil;a em graus de latitude de uma floresta a outra, conforme sugerido por Vel&aacute;zquez (1993), considerando-se cada 0,6º de latitude equivalente a 100m de altitude, assim, no M&eacute;xico, as &aacute;reas similares definidas est&atilde;o com altitude acrescida em 500m &agrave;s &aacute;reas compar&aacute;veis as do Brasil; 3) florestas que englobam, convencionalmente, uma s&eacute;rie de comunidades vegetais que se caracterizam por prosperar em lugares com relevo acidentado; 4) florestas com fisionomias semelhantes em rela&ccedil;&atilde;o a estratos e formas de vida dominantes; 5) florestas consideradas relictuais pela alta propor&ccedil;&atilde;o de endemismos que abrigam; 6) florestas com alta diversidade biol&oacute;gica relativa; e 7) florestas com distribui&ccedil;&atilde;o fragmentada.</font></P>      <P align="center"><a name="f1"><img border="0" src="/img/fbpe/inci/v31n11/Image467.jpg" width="376" height="458"></a></P>      
<P align="justify"><font size="2" face="Verdana">O trabalho no M&eacute;xico foi realizado em 9 localidades de florestas mes&oacute;filas, compreendendo os munic&iacute;pios de Molango, Lolotla, Xochicoatl&aacute;n e Tlanchinol (Estado de Hidalgo), na regi&atilde;o da Sierra Madre Oriental (20º51'65''N e 98º41'84''W). Nessas &aacute;reas a altitude varia entre 1380 a 1800m. A paisagem mostra relevo montanhoso de vertentes &iacute;ngrimes a declividades suaves. A temperatura m&eacute;dia anual varia entre 12 e 23ºC e a precipita&ccedil;&atilde;o m&eacute;dia &eacute; de 2000mm, a m&aacute;xima pluviosidade ocorre de junho a setembro (CONABIO, 1997). As caracter&iacute;sticas detalhadas destas florestas est&atilde;o descritas em Albuquerque et al. (2006).</font></P>     <P align="justify"><font size="2" face="Verdana">As florestas mes&oacute;filas mexicanas, as mais setentrionais da Am&eacute;rica, cont&ecirc;m no estrato arb&oacute;reo a maior porcentagem de g&ecirc;neros compartilhados com as duas zonas temperadas do hemisf&eacute;rio norte. No entanto, o sub-bosque compartilha a maioria das esp&eacute;cies arbustivas e herb&aacute;ceas com as florestas tropicais e subtropicais do hemisf&eacute;rio sul (Alc&aacute;ntara e Luna, 1997; Mayorga et al., 1998). Atualmente sua distribui&ccedil;&atilde;o est&aacute; bastante fragmentada e restrita a menos de 1% da superf&iacute;cie do pa&iacute;s (Rzedowski, 1996; Luna et al., 2001).</font></P>     ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">No Brasil, a regi&atilde;o de estudo foi na Serra do Japi, Jundia&iacute;, S&atilde;o Paulo (23º11'S e 45º52'W), nas &aacute;reas de florestas mes&oacute;filas cont&iacute;gua, localmente denominadas de DAEE (DAE), Para&iacute;so I e III (PI e PIII), Observat&oacute;rio (OBS) e TV Cultura (TV). Estas florestas t&ecirc;m altitudes que variam entre 700 e 1300m, com relevo montanhoso de vertentes retas e com declividades suaves. S&atilde;o fision&ocirc;micamente densas, apresentam todos os estratos com esp&eacute;cies tropicais, diferentes das do M&eacute;xico. As temperaturas m&eacute;dias anuais variam, em fun&ccedil;&atilde;o da altitude, entre 15,7ºC e 19,2ºC. A precipita&ccedil;&atilde;o anual m&eacute;dia &eacute; de 1501mm. A pluviosidade &eacute; m&aacute;xima nos meses de dezembro e janeiro e a estiagem m&aacute;xima &eacute; no julho, no inverno (Pinto, 1992).</font></P>     <P align="justify"><font size="2" face="Verdana">Nas partes baixas (750 a 870m) a fisionomia &eacute; t&iacute;pica de mata de planalto (florestas mes&oacute;fila semidec&iacute;dua), com &aacute;rvores espa&ccedil;adas, de di&acirc;metro e altura elevados, com indiv&iacute;duos emergentes de 20 a 25m de altura e copas com dossel descont&iacute;nuo. As partes altas (&gt;1000m) s&atilde;o caracterizadas por &aacute;rvores adensadas, de di&acirc;metro e altura menores (10-15m), com poucos indiv&iacute;duos emergentes e com dossel cont&iacute;nuo (floresta mes&oacute;fila semidec&iacute;dua de altitude; Rodrigues et al., 1989; Leit&atilde;o-Filho, 1992).</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">M&eacute;todos</font></P> </B>     <P align="justify"><font size="2" face="Verdana">Amostragem de esp&eacute;cies de Solanaceae</font></P>     <P align="justify"><font size="2" face="Verdana">Como &aacute;reas de amostragem foram selecionadas &aacute;reas de florestas mes&oacute;filas que variaram no seu grau de conserva&ccedil;&atilde;o, com presen&ccedil;a de trilhas ou estradas secund&aacute;rias em seu interior (com extens&atilde;o m&iacute;nima de 2km). As coletas se realizaram ao longo de transectos (1200m), dispostos paralelamente &agrave; floresta nas trilhas ou estradas secund&aacute;rias. Cada transecto foi dividido em 20 unidades amostrais (UA) de 10×3m, separadas umas das outras por 50m. No M&eacute;xico, foram tra&ccedil;ados 25 transectos (500UA) e, no Brasil, foram tra&ccedil;ados 14 (280UA), porque a &aacute;rea de estudo era menor. Dentro de cada UA foi feito a caracteriza&ccedil;&atilde;o das condi&ccedil;&otilde;es ambientais e o invent&aacute;rio das esp&eacute;cies de Solanaceae. De cada esp&eacute;cie contou-se o n&uacute;mero de indiv&iacute;duos, mediu-se altura e registrou-se o estado fenol&oacute;gico, bem como caracterizou-se morfol&ocirc;gicamente as flores e os frutos para enquadr&aacute;-los dentro das s&iacute;ndromes.</font></P>     <P align="justify"><font size="2" face="Verdana">O trabalho de campo no M&eacute;xico foi realizado de abril a novembro de 1999. No Brasil, o trabalho dividiu-se em duas partes: identifica&ccedil;&atilde;o das esp&eacute;cies de Solanaceae, realizado de 1987 a 1990, e observa&ccedil;&otilde;es fenol&oacute;gicas e de frugivoria (Albuquerque, 2001). De abril a julho de 2000 foi realizado as coletas intensivas, com identifica&ccedil;&atilde;o e caracteriza&ccedil;&atilde;o das esp&eacute;cies, para se comparar ao trabalho no M&eacute;xico.</font></P>     <P align="justify"><font size="2" face="Verdana">No M&eacute;xico, a identifica&ccedil;&atilde;o das esp&eacute;cies foi feita no Herb&aacute;rio Nacional do M&eacute;xico (MEXU), Universidade Nacional Aut&ocirc;noma do M&eacute;xico (UNAM), com aux&iacute;lio de literatura especializada, por compara&ccedil;&atilde;o e com o aux&iacute;lio de especialistas; os esp&eacute;cimes foram depositados no Herb&aacute;rio da Faculdade de Ci&ecirc;ncias (FCME-UNAM). No Brasil, a identifica&ccedil;&atilde;o foi feita por especialista e o material depositado no Herb&aacute;rio da Universidade Estadual de Campinas (UNICAMP).</font></P>      <P align="justify"><font size="2" face="Verdana">Caracteriza&ccedil;&atilde;o das s&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes</font></P>     <P align="justify"><font size="2" face="Verdana">A classifica&ccedil;&atilde;o de cada esp&eacute;cie de Solanaceae em um tipo de s&iacute;ndrome de poliniza&ccedil;&atilde;o (sensu Faegri e Pijl, 1980) e dispers&atilde;o de sementes (sensu Pijl, 1972) foi baseada em caracteres morfol&oacute;gicos (cor, forma e tamanho) a partir de observa&ccedil;&otilde;es de campo e consulta aos herb&aacute;rios. O tamanho dos frutos foi compilado da descri&ccedil;&atilde;o das esp&eacute;cies e completado com observa&ccedil;&otilde;es de campo. Trabalhos semelhantes, com compara&ccedil;&otilde;es geogr&aacute;ficas, foram feitos por Wilson et al. (1989) e Akwood et al. (1993).</font></P>     <P align="justify"><font size="2" face="Verdana">As s&iacute;ndromes de poliniza&ccedil;&atilde;o caracterizadas neste trabalho foram a) melitofilia, em esp&eacute;cies de Solanaceae com flores pequenas, de colora&ccedil;&atilde;o branca, p&aacute;lida ou verde, com odor adocicado, e com p&oacute;len como principal recurso floral; b) ornitofilia, em esp&eacute;cies com flores consp&iacute;cuas avermelhadas, em geral sem odor, com corola tubular e com n&eacute;ctar; e c) esfingofilia, em esp&eacute;cies com flores p&aacute;lidas, brancas a amareladas, corola tubular, odor adocicado, com antese crepuscular ou noturna e com n&eacute;ctar.</font></P>     ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">As s&iacute;ndromes de dispers&atilde;o de sementes foram dividas em a) ornitocoria, em esp&eacute;cies com frutos tipo baga carnosa, com colora&ccedil;&atilde;o consp&iacute;cua quando maduros (vermelho, alaranjado, branco, azul e atropurpureo) e em geral sem odor e pequenos; b) quiropterocoria, em esp&eacute;cies com frutos tipo baga carnosa, de colora&ccedil;&atilde;o n&atilde;o consp&iacute;cua (verde, marrom e &agrave;s vezes atropurpureo) e frequentemente com odor e de dimens&otilde;es vari&aacute;veis, podendo apresentar indumento como tricomas, ou c&aacute;lice concrecido; c) mamalocoria, naquelas esp&eacute;cies que, em fun&ccedil;&atilde;o da suas caracter&iacute;sticas e acessibilidade, os frutos s&atilde;o consumidos por mam&iacute;feros n&atilde;o-voadores (marsupiais, roedores e can&iacute;deos), os frutos s&atilde;o tipo baga, drupa e &agrave;s vezes secos, localizados em geral pelo cheiro, e normalmente as sementes t&ecirc;m prote&ccedil;&atilde;o &agrave; destrui&ccedil;&atilde;o mec&acirc;nica; d) autocoria, dispers&atilde;o dos frutos secos (c&aacute;psulas) pela pr&oacute;pria planta, atrav&eacute;s de mecanismos de turgor ou movimentos higrosc&oacute;picos (Pijl, 1972); e e) barocoria, caracterizada por frutos grandes, carnosos, os quais se desprendem da planta pelo seu peso gravitacional e s&atilde;o dispersos secundariamente por animais.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">An&aacute;lise dos Dados</font></P> </B>     <P align="justify"><font size="2" face="Verdana">Atrav&eacute;s de observa&ccedil;&otilde;es de campo, registrou-se o n&uacute;mero de indiv&iacute;duos de cada esp&eacute;cie de Solanaceae e calculou-se a abund&acirc;ncia relativa dessas esp&eacute;cies em cada &aacute;rea. Os dados foram usados para formar uma matriz (esp&eacute;cies × UA) que permitiu detectar grupos de taxa que se distribuem de maneira semelhantes, o que sugere que tais grupos tamb&eacute;m compartilham condi&ccedil;&otilde;es ecol&oacute;gicas semelhantes (Waite, 2000). O primeiro grupo compreende as esp&eacute;cies exclusivas que incluem taxa restritos a um grupo de UA exclusivos de determinadas &aacute;reas (esp&eacute;cies esteno&eacute;cias); o segundo &eacute; o de esp&eacute;cies caracter&iacute;sticas, as quais apresentam m&aacute;xima abund&acirc;ncia sob certas condi&ccedil;&otilde;es ambientais. O outro grupo inclui os taxa constantes definidos como aquelas esp&eacute;cies que s&atilde;o freq&uuml;entes em praticamente todas as UA, n&atilde;o mostrando prefer&ecirc;ncia por nenhuma condi&ccedil;&atilde;o ambiental (esp&eacute;cies euri&eacute;cias).</font></P>     <P align="justify"><font size="2" face="Verdana">Para quantificar, estatisticamente, os comportamentos das esp&eacute;cies, os dados foram agrupados usando o algor&iacute;timo de correspond&ecirc;ncia que permite identificar as esp&eacute;cies e as unidades amostrais que melhor tipificam os grupos de esp&eacute;cies encontrados (TWISPAN-Hill, 1979). Esse tipo de an&aacute;lise multivariada tem sido recomendada para estudos deste tipo, visando avaliar eq&uuml;itativamente o peso de todas as esp&eacute;cies (Terborgh e Robinson, 1986). O resultado foi apresentado em dendrograma para mostrar o gradiente de distribui&ccedil;&atilde;o das esp&eacute;cies.</font></P>     <P align="justify"><font size="2" face="Verdana">Para tentar identificar quais dos poss&iacute;veis fatores analisados explicam melhor a influenciam na distribui&ccedil;&atilde;o das esp&eacute;cies de Solanaceae nas florestas mes&oacute;filas, usou-se a an&aacute;lise de correspond&ecirc;ncia livre de tend&ecirc;ncia (detrended correspondence analysis, DCA; McCune e Mefford, 1995). Esse m&eacute;todo analisa a distribui&ccedil;&atilde;o das esp&eacute;cies e das unidades amostrais ao longo de eixos te&oacute;ricos que explicam a maior vari&acirc;ncia dos dados. Assim, as esp&eacute;cies mais agregadas ao longo dos eixos distribuem-se em condi&ccedil;&otilde;es ambientais similares.</font></P>     <P align="justify"><font size="2" face="Verdana">Ap&oacute;s a caracteriza&ccedil;&atilde;o das esp&eacute;cies de Solanaceae dentro das condi&ccedil;&otilde;es ambientais, foram feitas compara&ccedil;&otilde;es com base em suas s&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes, para determinar se havia diferen&ccedil;a significativa entre os pa&iacute;ses. A partir da tabela de conting&ecirc;ncia (que incluem grupos de taxa previamente definidos e as s&iacute;ndromes de poliniza&ccedil;&atilde;o e de dispers&atilde;o de sementes) aplicou-se o teste G, com n&iacute;vel de signific&acirc;ncia de p&lt;0,05 (Sokal e Rohlf, 1998).</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">Resultados</font></P> </B>     <P align="justify"><font size="2" face="Verdana">Solanaceae da Sierra Madre Oriental, M&eacute;xico</font></P>      <P align="justify"><font size="2" face="Verdana">Composi&ccedil;&atilde;o de esp&eacute;cies. Nas florestas mexicanas estudadas, foram identificadas 25 esp&eacute;cies de Solanaceae (<a href="#t1">Tabela I</a>, <a href="#f2"> Figura 2</a>). As esp&eacute;cies exclusivas (esteno&eacute;cias ou de amplitude ecol&oacute;gica limitada) foram S. rudepannum, S. erianthum e P. gracilis, enquanto as esp&eacute;cies constantes (euri&eacute;cias ou de maior amplitude ecol&oacute;gica) foram S. chrysotrichum e S. nigrescens. Por outro lado, h&aacute; tamb&eacute;m um conjunto de esp&eacute;cies caracter&iacute;sticas: S. pseudocapsicum, S. aligerum e C. oblongifolium. A partir disto pode-se inferir que as localidades Lolotla e Tianguistengo possuem condi&ccedil;&otilde;es ambientais semelhantes por compartilharem esp&eacute;cies exclusivas (S. rudepannum, S. erianthum e P. gracilis). Por sua vez, estas localidades diferem de Lontla e Apantlazol, cujas esp&eacute;cies exclusivas s&atilde;o C. elegans e S. appendiculatum. Os dados sugerem duas condi&ccedil;&otilde;es ambientais diferentes. Outras esp&eacute;cies como S. pseudocapsicum, S. aligerum e C. oblongifolium, ocorrem dentro de certas condi&ccedil;&otilde;es ambientais, mas s&atilde;o mais abundantes em certas comunidades.</font></P>      <P align="center"><a name="t1"><img border="0" src="/img/fbpe/inci/v31n11/Image468.jpg" width="542" height="929"></a></P>      
]]></body>
<body><![CDATA[<P align="center"><a name="f2"><img border="0" src="/img/fbpe/inci/v31n11/Image469.jpg" width="533" height="370"></a></P>      
<P align="justify"><font size="2" face="Verdana">Classifica&ccedil;&atilde;o.<B> </B>Das 500UA apenas 392 continham esp&eacute;cies de Solanaceae, as quais foram comparadas e tiveram a sua dissimilaridade medida (an&aacute;lise de classifica&ccedil;&atilde;o TWINSPAN). O dendrograma (<a href="#f2">Figura 2</a>) mostrou a maior divis&atilde;o em dois grupos (Grupo I e II). O Grupo I abriga as esp&eacute;cies que por suas caracter&iacute;sticas ecol&oacute;gicas se distribuem nas condi&ccedil;&otilde;es de menor perturba&ccedil;&atilde;o e maior umidade, como S. aligerum, do que as esp&eacute;cies do Grupo II, como C. oblongifolium. A partir destes resultados recalculou-se a abund&acirc;ncia das esp&eacute;cies de cada grupo, a qual indica que existem esp&eacute;cies exclusivas ou altamente seletivas de certas condi&ccedil;&otilde;es ambientais (<a href="#t1">Tabela I</a>), como S. pseudocapsicum e S. aligerum (Grupo I), C. oblongifolium e S. rudepannum (Grupo II).</font></P>      <P align="justify"><font size="2" face="Verdana">Ordena&ccedil;&atilde;o. O DCA permitiu inferir os poss&iacute;veis fatores que melhor explicam a distribui&ccedil;&atilde;o e abund&acirc;ncia das esp&eacute;cies de Solanaceae (<a href="#f3">Figura 3</a>). Os resultados do DCA mostram que as unidades amostram dividem significativamente entre os grupos ao longo do eixo I (l<SUB>1</SUB>= 0,77, a vari&acirc;ncia explica 48%). Esse eixo sugere o gradiente de perturba&ccedil;&atilde;o e umidade como inferido anteriormente, com base nas observa&ccedil;&otilde;es de campo. Ao longo do eixo II (l<SUB>2</SUB>= 0,63, a vari&acirc;ncia explica 22%) a distribui&ccedil;&atilde;o das esp&eacute;cies n&atilde;o est&aacute; claramente relacionada a um determinado fator ambiental.</font></P>      <P align="justify"><font size="2" face="Verdana">S&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes. Das esp&eacute;cies de Solanaceae coletadas 60% eram arbustivas, 24% herb&aacute;ceas, 12% de lianas e apenas 4% arb&oacute;reas. Destas esp&eacute;cies, 84% eram melit&oacute;filas (Tabela II dispon&iacute;vel em: (www.igeograf.unam.mx/ua_morelia/tabelas2 e 4/alex.html).. A partir das caracter&iacute;sticas morfol&oacute;gicas dos frutos, identificou-se quatro s&iacute;ndromes (autocoria, ornitocoria, quiropterocoria e mamaliocoria), sendo que 44% das esp&eacute;cies eram ornitoc&oacute;ricas, com frutos pequenos de di&acirc;metro entre 7 a 15mm (54,5% desses frutos eram vermelhos/alaranjados, 27,3% atropurpureo, 9,1% brancos e os demais indeterminados). Das esp&eacute;cies quiropteroc&oacute;ricas (36%), o tamanho dos frutos variou de 8 a 35mm (77,8% desses frutos tinham colora&ccedil;&atilde;o verde/amarelada e 11,1% atropurpureos e os demais indeterminados). Em rela&ccedil;&atilde;o &agrave; orienta&ccedil;&atilde;o dos frutos predominou frutos erectos (9/24) e reflexos (8/24), p&ecirc;ndulos foram registrados em apenas duas esp&eacute;cies, uma de fruto seco e a outra carnoso.</font></P>      <P align="center"><a name="f3"><img border="0" src="/img/fbpe/inci/v31n11/Image470.jpg" width="399" height="242"></a></P>      
<P align="justify"><font size="2" face="Verdana">Solanaceae da Serra do Japi, Brasil</font></P>      <P align="justify"><font size="2" face="Verdana">Composi&ccedil;&atilde;o de esp&eacute;cies. Nas florestas mes&oacute;filas da Serra do Japi, identificou-se 26 esp&eacute;cies de Solanaceae (<a href="#t1">Tabela I</a>, <a href="#f4"> Figura 4</a>). As esp&eacute;cies exclusivas (esteno&eacute;cias) foram, por exemplo, S. sanctae-catarinae e S. americanum e as esp&eacute;cies constantes (euri&eacute;cias) foram A. fasciculata e S. rufescens. Por outro lado, h&aacute; tamb&eacute;m um conjunto de esp&eacute;cies caracter&iacute;sticas como: S. decompositiflorum, S. inodorum e S. megalochiton. As localidades menos semelhantes foram o DAE e o PI, que n&atilde;o compartilharam esp&eacute;cies exclusivas. No DAE a esp&eacute;cie exclusiva &eacute; S. sanctae-catarinae e no PI S. intermedium.</font></P>      <P align="justify"><font size="2" face="Verdana">Classifica&ccedil;&atilde;o. Das 280UA, 207 apresentavam esp&eacute;cies de Solanaceae. Estas foram comparadas atrav&eacute;s da medida da sua dissimilaridade. O dendrograma (<a href="#f4">Figura 4</a>) mostrou maior divis&atilde;o em dois grupos (Grupo III e IV, l= 0,82). O Grupo III agrupa as esp&eacute;cies que se distribuem preferencialmente na localidade do PI, como S. intermedium. Por outro lado, o Grupo IV se subdivide significativamente (l= 0,75) em dois subgrupos: a esp&eacute;cie preferencial do lado esquerdo &eacute; S. inodorum e as unidades amostrais s&atilde;o principalmente dos locais OBS, PIII e da TV; do lado direito, est&aacute; o DAE, com S. mauritianum. A partir dos dois grupos formados recalculou-se a abund&acirc;ncia das esp&eacute;cies de cada grupo (<a href="#t1">Tabela I</a>), identificando as esp&eacute;cies diferenciais, no Grupo III (C. intermedium) e Grupo IV (S. inodorum e S. pseudoquina).</font></P>      <P align="center"><a name="f4"><img border="0" src="/img/fbpe/inci/v31n11/Image471.jpg" width="470" height="400"></a></P>      
<P align="justify">&nbsp;</P>     ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">Ordena&ccedil;&atilde;o. Para auxiliar a an&aacute;lise dos prov&aacute;veis fatores que poderiam estar atuando na distribui&ccedil;&atilde;o e abund&acirc;ncia das esp&eacute;cies de Solanaceae, construiu-se o diagrama de ordena&ccedil;&atilde;o das esp&eacute;cies (DCA). Os resultados mostram que as unidades amostrais dividem significativamente entre os grupos ao longo dos eixos (l<SUB>1</SUB>= 0,90, com vari&acirc;ncia de 39% e l<SUB>2</SUB>= 0,65, com vari&acirc;ncia de 58%). O eixo I est&aacute; representado pelas esp&eacute;cies caracter&iacute;sticas do Grupo III (S. intermedium e A. fasciculata). Esse eixo pode estar relacionado ao tipo de relevo (plat&ocirc; da montanha), sua localiza&ccedil;&atilde;o e ao grau de exposi&ccedil;&atilde;o, assim como aos processos hist&oacute;ricos. Desta forma, as esp&eacute;cies do Grupo III parecem ser favorecidas pela exposi&ccedil;&atilde;o desse plat&ocirc;, o qual recebe fortes correntes de ventos. As esp&eacute;cies do Grupo IV melhor se distribuem ao longo do eixo II (S. sanctae-catarinae e S. americanum). Esse eixo est&aacute; relacionado com a altitude e a umidade (<a href="#f5">Figura 5</a>).</font></P>      <P align="center"><a name="f5"><img border="0" src="/img/fbpe/inci/v31n11/Image472.jpg" width="391" height="273"></a></P>      
<P align="justify"><font size="2" face="Verdana">S&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes. Das esp&eacute;cies de Solanaceae coletadas 53,8% eram arbustivas, 30,8% arb&oacute;reas, 11,5% herb&aacute;ceas e 3,8% lianas. Ao se comparar os h&aacute;bitos de vida de Solanaceae entre o M&eacute;xico e o Brasil, verificou-se que h&aacute; predomin&acirc;ncia de esp&eacute;cies arbustivas em ambos os pa&iacute;ses, seguidas por herb&aacute;ceas no M&eacute;xico e arb&oacute;reas no Brasil. Entre as esp&eacute;cies do Brasil, 92,3% s&atilde;o melit&oacute;filas. A partir das caracter&iacute;sticas morfol&oacute;gicas dos frutos, identificou-se cinco s&iacute;ndromes de dispers&atilde;o de sementes: autocoria, barocoria, quiropterocoria, ornitocoria e mamaliocoria. Sendo 73,7% das esp&eacute;cies quiropteroc&oacute;ricas e frutos com di&acirc;metro entre 6 a 35mm (84,21% desses frutos eram verdes/amarelados, 10,5% atropurpureos e 5,3 violetas). Entre as esp&eacute;cies ornitoc&oacute;ricas (11,5%), o tamanho dos frutos variou de 5 a 10mm (66,7% desses frutos eram vermelhos/alaranjados, 33,3% atropurpureos). Em rela&ccedil;&atilde;o &agrave; orienta&ccedil;&atilde;o dos frutos, predominou frutos pendulares (15/26) sobre eretos (7/26), (Tabela IV dispon&iacute;vel em: (www.igeograf.unam.mx/ua_morelia/tabelas2 e 4/alex.html).</font></P>      <P align="justify"><font size="2" face="Verdana">Compara&ccedil;&atilde;o M&eacute;xico Brasil</font></P>     <P align="justify"><font size="2" face="Verdana">Ao se comparar as s&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes entre o M&eacute;xico e o Brasil (<a href="#f6">Figura 6</a>), verificou-se que as esp&eacute;cies de Solanaceae s&atilde;o predominantemente melit&oacute;filas (84 e 92,3%, respectivamente). Entretanto, em rela&ccedil;&atilde;o &agrave;s s&iacute;ndromes de dispers&atilde;o h&aacute; diferen&ccedil;a significativa entre M&eacute;xico e Brasil (G<SUB>adj</SUB>= 22,216 &gt;X<SUP>2</SUP><SUB>0,05[5]</SUB>= 12,832). No M&eacute;xico, h&aacute; predomin&acirc;ncia de esp&eacute;cies ornitoc&oacute;ricas (44%) e, no Brasil, quiropteroc&oacute;ricas (73%), (<a href="#f6">Figura 6</a>).</font></P>      <P align="center"><a name="f6"><img border="0" src="/img/fbpe/inci/v31n11/Image473.jpg" width="312" height="366"></a></P>  <B>    
<P align="justify"><font size="2" face="Verdana">Discuss&atilde;o</font></P> </B>     <P align="justify"><font size="2" face="Verdana">Composi&ccedil;&atilde;o de esp&eacute;cies de Solanaceae</font></P>     <P align="justify"><font size="2" face="Verdana">As florestas estudadas s&atilde;o semelhantes em rela&ccedil;&atilde;o ao n&uacute;mero de esp&eacute;cies de Solanaceae (M&eacute;xico t&ecirc;m 25 esp&eacute;cies e Brasil 26), mas diferem quanto &agrave; sua composi&ccedil;&atilde;o. Das esp&eacute;cies do M&eacute;xico duas, B. suaveolens e C. betacea, s&atilde;o origin&aacute;rias da Am&eacute;rica do Sul.<B> </B>No M&eacute;xico, outros trabalhos (Luna et al., 1994; Alc&aacute;ntara e Luna, 1997; Mayorga et al., 1998) afirmam que as esp&eacute;cies de Solanaceae constituem entre 3,6 e 4,6% do total de esp&eacute;cies de plantas vasculares (12 a 20 esp&eacute;cies) das florestas mesof&iacute;ticas. No Brasil, de acordo com Jo&atilde;o Vasconcellos-Neto (comunica&ccedil;&atilde;o pessoal), toda a Serra do Japi abriga 47 esp&eacute;cies de Solanaceae. Ao se comparar o h&aacute;bito de vida de Solanaceae verifica-se que o Brasil tem 7,5 vezes mais esp&eacute;cies arb&oacute;reas que o M&eacute;xico, talvez em fun&ccedil;&atilde;o da origem dessas florestas. Como as florestas estudadas no M&eacute;xico est&atilde;o no limite do neotr&oacute;pico, as esp&eacute;cies do estrato arb&oacute;reo s&atilde;o predominantemente ne&aacute;rticas e as do sub-bosques s&atilde;o de origem tropical, como ressaltam os trabalhos de Rzedowski (1996), Alc&aacute;ntara e Luna (1997) e Mayorga et al., (1998). Ver Albuquerque (2001) para uma revis&atilde;o completa de Solanaceae das regi&otilde;es de estudo.</font></P>     <P align="justify"><font size="2" face="Verdana">Apesar da origem comum destas florestas mexicanas, observou-se claras diferen&ccedil;as flor&iacute;sticas das esp&eacute;cies de Solanaceae entre as &aacute;reas estudadas. Padr&otilde;es de composi&ccedil;&atilde;o de esp&eacute;cies semelhantes t&ecirc;m sido observados em outros grupos flor&iacute;sticos, de tal forma que a mudan&ccedil;a na composi&ccedil;&atilde;o pode indicar diferentes condi&ccedil;&otilde;es hist&oacute;ricas, ecol&oacute;gicas e ambientais (Luna et al., 1994; Alc&aacute;ntara e Luna, 1997; Mayorga et al., 1998, Vel&aacute;zquez et al., 2000).</font></P>     ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">Em geral as solan&aacute;ceas s&atilde;o conhecidas por serem amplamente distribu&iacute;das, e neste trabalho foram observadas esp&eacute;cies indiferentes &agrave;s varia&ccedil;&otilde;es microclim&aacute;ticas, como S. chrysotrichum e S. nigrescens (M&eacute;xico). H&aacute; tamb&eacute;m aquelas com restri&ccedil;&otilde;es ecol&oacute;gicas como C. elegans, S. aligerum (M&eacute;xico) e S. intermedium e S. inodorum (Brasil). A diversidade de h&aacute;bitos de vida de Solanaceae, somada &agrave;s suas estrat&eacute;gias reprodutivas, possibilita ao grupo o &ecirc;xito na coloniza&ccedil;&atilde;o dos diversos habitats, assim como nos diversos estratos da floresta.</font></P>      <P align="justify"><font size="2" face="Verdana">S&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o de sementes</font></P>     <P align="justify"><font size="2" face="Verdana">As solan&aacute;ceas, em geral, reproduzem-se de forma sexuada. No entanto, algumas esp&eacute;cies como B. suaveolens se reproduzem vegetativamente, atrav&eacute;s da forma&ccedil;&atilde;o de ra&iacute;zes gem&iacute;feras (Nee, 1986). No M&eacute;xico, para B. suaveolens, at&eacute; o momento, n&atilde;o houve registros da presen&ccedil;a de frutos. Provavelmente, isto se deve &agrave; aus&ecirc;ncia de polinizadores, visto que a planta foi introduzida naquele pa&iacute;s e &eacute; proveniente da Am&eacute;rica do Sul. Analisando morfol&oacute;gicamente a flor e comparando-se com os dados de Endress (1994), esta esp&eacute;cie pode ser polinizada por esfing&iacute;deos, mas os morcegos n&atilde;o podem ser descartados. Segundo Hern&aacute;ndez e Carre&oacute;n (1987), h&aacute; car&ecirc;ncia de polinizadores em florestas mes&oacute;filas de montanha, quando comparadas com florestas tropicais.</font></P>     <P align="justify"><font size="2" face="Verdana">A partir das caracter&iacute;sticas florais das solan&aacute;ceas, verificou-se que a melitofilia &eacute; a s&iacute;ndrome de poliniza&ccedil;&atilde;o mais comum em ambos os pa&iacute;ses. Esses resultados s&atilde;o similares aos encontrados por Hern&aacute;ndez e Carre&oacute;n (1987) em floresta mes&oacute;fila de montanha de Michoac&aacute;n (M&eacute;xico). A melitofauna de algumas florestas mes&oacute;filas de montanha da Sierra Madre Oriental (Tlanchinol e Tenango de Doria) &eacute; bastante diversificada, apresentando 178 esp&eacute;cies, das quais 94% s&atilde;o coletoras de p&oacute;len (God&iacute;nez, 1997). Em florestas tropicais, cerca de 94% das esp&eacute;cies vegetais s&atilde;o zo&oacute;filas (Bawa et al., 1985; Morellato, 1991; Reis et al., 1996) e as solan&aacute;ceas seguem o mesmo padr&atilde;o das demais esp&eacute;cies tropicais.</font></P>     <P align="justify"><font size="2" face="Verdana">As s&iacute;ndromes de poliniza&ccedil;&atilde;o e dispers&atilde;o das &aacute;rvores e arbustos em florestas mes&oacute;filas, segundo Morellato (1991), confirmam a rela&ccedil;&atilde;o funcional destas esp&eacute;cies vegetais com seus polinizadores e/ou dispersores. Por exemplo, as abelhas s&atilde;o os polinizadores mais importantes da maioria das esp&eacute;cies nativas e cultivadas. A fauna mexicana de abelhas nativas &eacute; muito grande e diversificada, sendo uma das mais ricas do ocidente (God&iacute;nez, 1997). Ao redor de 10% da apifauna mundial se concentra no M&eacute;xico (God&iacute;nez, 1991; Michener et al., 1994) e, desta forma, o M&eacute;xico tem sido considerado como o &quot;centro de diversifica&ccedil;&atilde;o&quot; de abelhas (LaBerge, 1986).</font></P>     <P align="justify"><font size="2" face="Verdana">Ao se comparar as s&iacute;ndromes de dispers&atilde;o de sementes entre os pa&iacute;ses, verificou-se que h&aacute; diferen&ccedil;a significativa; no M&eacute;xico prevalece a ornitocoria e no Brasil a quiropterocoria. Os frutos caracterizados como ornitoc&oacute;ricos s&atilde;o pequenos (&lt;15mm) de colora&ccedil;&atilde;o vermelho, laranjado, branco ou atropurpureo. Tais caracter&iacute;sticas tamb&eacute;m foram relatadas por Pijl (1972), Janson (1983) e Korine et al. (1998). Frutos quiropteroc&oacute;ricos t&ecirc;m tamanho vari&aacute;vel, colora&ccedil;&atilde;o predominante verde ou amarelada e algumas vezes atropurpurea, tamb&eacute;m observados por Pijl (1972), Morrison (1980), Charles-Dominique (1986) e Korine et al. (1998). A orienta&ccedil;&atilde;o dos frutos de Solanaceae, no Brasil, parece ser um fator importante na detec&ccedil;&atilde;o pelos dispersores. Frutos pendentes em geral s&atilde;o consumidos por morcegos, como observado por Morrison (1980) e Charles-Dominique (1986). Por outro lado, os frutos ornitoc&oacute;ricos t&ecirc;m uma tend&ecirc;ncia a serem eretos e reflexos, como observado nas esp&eacute;cies estudadas no M&eacute;xico. No entanto, o fator mais relevante do que a orienta&ccedil;&atilde;o do fruto talvez seja a sua acessibilidade para os frug&iacute;voros, definida em fun&ccedil;&atilde;o da arquitetura da planta.</font></P>     <P align="justify"><font size="2" face="Verdana">A dispers&atilde;o zooc&oacute;rica, tanto como outras, &eacute; fundamental para o processo de regenera&ccedil;&atilde;o das &aacute;reas perturbadas, abertas e/ou abandonadas. Os frug&iacute;voros, em fun&ccedil;&atilde;o de terem uma dieta diversificada de frutos, ao se alimentarem nestas &aacute;reas, trazem, junto com suas fezes, sementes de outras popula&ccedil;&otilde;es e/ou de outras esp&eacute;cies. Esta chuva de sementes pode contribuir tamb&eacute;m para o enriquecimento do banco de sementes destas &aacute;reas, podendo acelerar a regenera&ccedil;&atilde;o. O banco de sementes pode ter import&acirc;ncia no estabelecimento de esp&eacute;cies de &aacute;rvores e arbustos pioneiros, componentes de grupos ecol&oacute;gicos envolvidos na regenera&ccedil;&atilde;o da floresta ap&oacute;s a perturba&ccedil;&atilde;o (Baider et al., 1999).</font></P>     <P align="justify"><font size="2" face="Verdana">Em muitas comunidades, uma grande propor&ccedil;&atilde;o de plantas &eacute; dispersa por animais. Nas florestas tropicais, 50 a 90% das esp&eacute;cies arb&oacute;reas produzem frutos carnosos adaptados para o consumo de aves ou mam&iacute;feros (Howe e Smallwood, 1982). Em florestas temperadas do norte, ~50% das esp&eacute;cies s&atilde;o dispersas por vertebrados e nas florestas temperadas &uacute;midas do sul h&aacute; grande varia&ccedil;&atilde;o (Nova Zel&acirc;ndia 27-60% e Chile 45-70% das esp&eacute;cies; Wilson et al., 1989). A dispers&atilde;o de sementes por vertebrados &eacute; considerada como a chave do mecanismo reprodutivo de muitas esp&eacute;cies de plantas tropicais (Medell&iacute;n e Gaona, 1999) e varia de acordo com o estrato da floresta. Em florestas mes&oacute;filas brasileiras a porcentagem de esp&eacute;cies zooc&oacute;ricas aumenta do estrato emergente ao sub-bosque, e a anemocoria &eacute; mais alta no estrato emergente e ausente no sub-bosque (Morellato e Leit&atilde;o-Filho, 1992).</font></P>     <P align="justify"><font size="2" face="Verdana">Os vertebrados das florestas mes&oacute;filas de montanha do M&eacute;xico, exibem semelhan&ccedil;as biogeogr&aacute;ficas com as plantas do sub-bosque, tendo em vista que, em sua maioria, t&ecirc;m afinidades predominantemente neotropicais, com exce&ccedil;&atilde;o da avifauna (Challenger, 1998). A distribui&ccedil;&atilde;o das esp&eacute;cies zooc&oacute;ricas nos estratos inferiores parece estar relacionada &agrave; &aacute;rea de vida e atividade dos dispersores (Frankie et al., 1974; Foster, 1982). O desenvolvimento da dispers&atilde;o de sementes por vertebrados depende dos processos filogen&eacute;ticos, hist&oacute;ricos e geogr&aacute;ficos, assim como da disponibilidade dos agentes dispersores apropriados, os quais variam regionalmente e entre comunidades dentro de uma regi&atilde;o (Wilson et al., 1989).</font></P>     <P align="justify"><font size="2" face="Verdana">A maior propor&ccedil;&atilde;o de esp&eacute;cies de Solanaceae quiropteroc&oacute;ricas, na &aacute;rea de estudo do Brasil quando comparada ao M&eacute;xico, deve-se provavelmente ao fato de que a Am&eacute;rica do Sul &eacute; considerada o centro de diversifica&ccedil;&atilde;o de Solanaceae (Hunziker, 1979), assim como de Phyllostomidae, Chiroptera (Koopman, 1982). Desta forma pode-se sugerir que, possivelmente, tenha ocorrido um processo de coadapta&ccedil;&atilde;o entre esp&eacute;cies de Solanaceae e Chiroptera.</font></P>     ]]></body>
<body><![CDATA[<P align="justify"><font size="2" face="Verdana">As solan&aacute;ceas s&atilde;o conhecidas por suas caracter&iacute;sticas quiropteroc&oacute;ricas, principalmente o g&ecirc;nero Solanum (V&aacute;zquez-Yanes et al., 1975; Symon, 1979; Fleming e Sosa, 1994; Hern&aacute;ndez-Conrique et al., 1997; Galindo-Gonz&aacute;lez, 1998; Medell&iacute;n e Gaona, 1999), como tamb&eacute;m foi observado neste trabalho (<a href="#f6">Figura 6</a>). Por outro lado, os morcegos apresentam maior diversifica&ccedil;&atilde;o em ambientes tropicais ou subtropicais. O Brasil &eacute; considerado um dos maiores detentores de diversidade biol&oacute;gica, contendo 524 esp&eacute;cies de mam&iacute;feros (Mittermeier et al., 1997). Para Chiroptera est&atilde;o descritas 141 esp&eacute;cies, e no bioma Mata Atl&acirc;ntica (&aacute;rea de estudo deste trabalho) os morcegos representam 36% da fauna de mam&iacute;feros (Fonseca et al., 1996). No M&eacute;xico, a ordem Chiroptera tamb&eacute;m &eacute; bastante diversificada, representada por 137 esp&eacute;cies, aproximadamente, 25% das esp&eacute;cies de mam&iacute;feros (Medell&iacute;n et al., 1997). No M&eacute;xico a maior riqueza de esp&eacute;cies de Chiroptera se concentra no centro do pa&iacute;s, pr&oacute;xima aos 20ºN, um pouco abaixo da &aacute;rea de estudo, enquanto as aves no sudeste do M&eacute;xico (Ramamoorthy et al., 1998).</font></P>     <P align="justify"><font size="2" face="Verdana">Quando se comparam os morcegos do M&eacute;xico e do Brasil, com base nos trabalhos de Medell&iacute;n et al. (1997) e Fonseca et al. (1996), verifica-se que h&aacute; o mesmo n&uacute;mero de categorias tr&oacute;ficas. No M&eacute;xico, os inset&iacute;voros s&atilde;o mais diversificados (90/137) que no Brasil (74/141); por outro lado, no Brasil os frug&iacute;voros/on&iacute;voros t&ecirc;m maior n&uacute;mero de esp&eacute;cies (40/141) que no M&eacute;xico (24/137). De acordo com Medell&iacute;n et al. (1997) a maioria das esp&eacute;cies de morcegos do M&eacute;xico alimenta-se de insetos e outros artr&oacute;podos, mas nas zonas tropicais muitas esp&eacute;cies alimentam-se de frutos, n&eacute;ctar ou p&oacute;len. Segundo Terborgh e Robinson (1986) nos tr&oacute;picos o n&uacute;mero de esp&eacute;cies nas categorias tr&oacute;ficas pode ser o resultado das condi&ccedil;&otilde;es ecol&oacute;gicas ou dos processos evolutivos.</font></P>     <P align="justify"><font size="2" face="Verdana">Em algumas zonas tropicais os morcegos, os mam&iacute;feros mais abundantes, associados ao seu grau de especializa&ccedil;&atilde;o alimentar determinam que seus efeitos sobre os processos ecol&oacute;gicos sejam de grande import&acirc;ncia. Nas regi&otilde;es tropicais &uacute;midas, Medell&iacute;n et al. (1997) estimaram que os morcegos dispersam 2 a 8 vezes mais sementes de esp&eacute;cies pioneiras do que as aves, fato que demonstra sua import&acirc;ncia no processo de regenera&ccedil;&atilde;o natural das florestas. Sem os morcegos, possivelmente muitos ecossistemas mudariam de maneira radical sua natureza, estrutura e diversidade (Medell&iacute;n et al., 1997).</font></P>     <P align="justify"><font size="2" face="Verdana">Neste trabalho confirmou-se que as solan&aacute;ceas podem ser polinizadas tanto por abelhas, mariposas como beija-flores, e dispersas por aves, morcegos e outros mam&iacute;feros (como marsupiais e can&iacute;deos). No entanto, sabe-se por outros trabalhos, que algumas esp&eacute;cies podem ser dispersas por r&eacute;pteis (Rick e Bowman, 1961; Albuquerque, 2001), o que ressalta que s&atilde;o predominantemente zo&oacute;filas e zooc&oacute;ricas.</font></P>     <P align="justify"><font size="2" face="Verdana">Em s&iacute;ntese, as florestas estudadas (M&eacute;xico e Brasil) t&ecirc;m n&uacute;meros similares de esp&eacute;cies de Solanaceae, mas diferem na composi&ccedil;&atilde;o, por&eacute;m apresentam similaridade quanto aos polinizadores, seguindo o padr&atilde;o tropical melit&oacute;filo, mas divergem quanto aos espa&ccedil;os funcionais dos dispersores de sementes. No M&eacute;xico h&aacute; predomin&acirc;ncia de esp&eacute;cies ornitoc&oacute;ricas e no Brasil quiropteroc&oacute;ricas, apesar das condi&ccedil;&otilde;es mesof&iacute;ticas serem equivalentes. Essa diferen&ccedil;a pode ser refor&ccedil;ada pela origem. A flora e a fauna mexicana recebem influ&ecirc;ncia da regi&atilde;o ne&aacute;rtica, pelo fato do pa&iacute;s estar localizado na zona intermedi&aacute;ria entre os climas temperado e tropical. Nos limites entre as biotas ne&aacute;rticas e neotropicais se entrela&ccedil;am as esp&eacute;cies que se estenderam ao norte ou ao sul durante uma s&eacute;rie de interc&acirc;mbios (Ramamoorthy et al., 1998), enquanto no Brasil n&atilde;o h&aacute; influ&ecirc;ncia ne&aacute;rtica.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">Agradecimentos</font></P> </B>     <P align="justify"><font size="2" face="Verdana">Os autores agradecem, no M&eacute;xico, a J.L. Pal&aacute;cio (Instituto de Geograf&iacute;a) e M. Souza (Instituto de Biolog&iacute;a) por o acesso ao Herb&aacute;rio Nacional de M&eacute;xico-MEXU, a M. Souza-Pe&ntilde;a pela identifica&ccedil;&atilde;o de alguns exemplares de Solanaceae e a Rafael Mayorga-Saucedo pelo apoio em campo e auxilio na identifica&ccedil;&atilde;o das esp&eacute;cies. No Brasil, a Jo&atilde;o Renato Stehmann pela identifica&ccedil;&atilde;o das esp&eacute;cies, a M. Cipollini pela leitura e sugest&otilde;es ao primeiro manuscrito. A CAPES pela bolsa que propiciou o interc&acirc;mbio, a UNICAMP pela sua infra-estrutura e log&iacute;stica, a Universidade Cat&oacute;lica Dom Bosco (UCDB) e a UNAM (Faculdade de Ci&ecirc;ncias e Instituto de Ecolog&iacute;a) pelo apoio log&iacute;stico, &Agrave; Alejandra Larrazabal pela colabora&ccedil;&atilde;o na revis&atilde;o da vers&atilde;o final deste manuscrito.</font></P>  <B>    <P align="justify"><font size="2" face="Verdana">Refer&ecirc;ncias</font></P> </B>     <!-- ref --><P align="justify"><font size="2" face="Verdana">1. 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