Resumo

NUNEZ RAVELO, Franklin. Microbiotic crusts composition and its influence on soil properties in semiarid . Revista de Investigación [online]. 2013, vol.37, n.80, pp.91-116. ISSN 1010-2914.

The purpose of this study was to analyze the influence of constituent species  microbiotic  crusts  in  some  soil  physicochemical  properties.  For this  developed  three  phases:  (a)  field,  to  collect  soil  samples  with  and without microbiotic crusts; (b) Laboratory, allowed the measurements of the variables studied in soil samples, discriminating those with microbiotic cons morphological groups;(c) interpretation of the results, using analysis of  variance  (ANOVA).  The  results  reveal  that  the  samples  in  the  lichen dominated, have a tendency towards higher values alkalization of soils, while those with only bryophyte have towards neutral pH and significantly higher values of CO, CO2 and MO. No evident variations associated with morphological groups that constitute the crust, in properties salinity, C.E and humidity.

Palavras-chave : bryophyte; lichen; microbiotic crust; soil properties.

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