Abstract

DEL VALLE-ARANGO, Jorge Ignacio. Cantidad, calidad y nutrientes reciclados por la hojarasca fina en bosques pantanosos del pacífico sur colombiano. INCI [online]. 2003, vol.28, n.8, pp.443-449. ISSN 0378-1844.

Between August 1993 and March 1995, fine litterfall was collected every two weeks in three plots with 35 randomly located 1x1m traps in three different tropical forest wetland associations (swamp forests) from the Patía River delta, Colombia South Pacific. The object was to characterize the bioelements recycled in this forest and to compare them with other lowland tropical rain forests. Plot 1 (0.5ha) was established in a selective felling 15 years ago in a "cuangarial" stand with a basal area (G)= 17.2m²·ha^-1 (trees with diameter Å10cm); tree species (S)= 37; density (N)= 598 trees/ha, Otoba gracilipes: Myristicaceae being 34% of N. Plot 2 (1ha) was established in a selective felling 20 years ago in a mixed "guandal" stand with G= 17.9m2·ha^-1; S= 37 species; N= 650 trees/ha, Psycotria santaritensis (Rubiaceae) being the most abundant species, representing 16% of N. Plot 3 (0.5ha) was established in an old secondary "sajal" stand with G= 44.5m²·ha^-1; S= 12 species; N= 642 trees/ha, Campnosperma panamense: Anacadiaceae being 79% of N. The average annual litterfall for the tree plots was 11.7t·ha^-1 and the bioelements measured (kg·ha^-1 per year) were N 157, P 4.8, K 8.0, Ca 114, Mg 19.1, Na 2.4, Fe 1.01, Cu 0.10, and Zn 0.32. The results suggest that due to the very low recycled K, this permanently flooded black water forest is oligotrophic in nature.

Keywords : Bosques Pantanosos Tropicales ; Campnosperma panamense ; Hojarasca Fina ; Humedales ; Otoba gracilipes; Reciclaje de Nutrientes .