Are sugarcane leaf-detritus well colonized by aquatic macroinvertebrates?

Abstract

Aim:The aim was to compare the kinetics of decomposition and the colonization of leaf litter of two plant species, the native Talauma ovata (pinha-dobrejo) and the exotic Saccharum officinarum (sugarcane), by aquatic macroinvertebrates; Methods: From each substrate, three recipients of colonization were taken from a stream, and the specimens identified to the lowest taxonomic level on days 7, 15, 34, 44, 61 and 75. The debris was weighed at the beginning and end of the experiment and determined their cell wall fractions; Results: The coefficients of mineralization indicated higher velocity decay of organic matter refractory in T. ovata. There was no difference in taxonomic structure of macroinvertebrates, between the two substrates, but the community exhibited distinct functional feeding groups in the peak of colonization, with a greater number of shredders in T. ovata. The successive states of decomposition of the two plant detritus showed distinct macroinvertebrate densities; Conclusions: The amount and state of the plant biomass were important factors influencing the density and diversity of the macroinvertebrate fauna throughout the process of organic decomposition.

La colonización y descomposición biológica de la hojarasca en un arroyo subtropical

“…Chironomidae was the most numerous group during the entire decomposition process, comprising alone 7.5% of the shredders. The genus Endotribelos increased shredders density, likely contributing to enhance leaf decomposition, as has been shown in other related studies (Janke and Trivinho-Strixino 2007;Chará-Serna et al 2012;Leite-Rossi and Trivinho-Strixino 2012). Similarly, chironomids have been recorded as important components of the invertebrate communities attaining high abundance and richness.…”

Aquatic macroinvertebrate colonization of artificial substrates in low-order streams

“…Colonization experiments have been used in river and stream biomonitoring programs (OLOMUKORO; TOCHUKWU, 2006), and analyses of lotic system communities with varying habitat characteristics or under the inluence of human impacts have been conducted through experiments measuring colonization on both natural and artiicial substrates (CARVALHO; UIEDA, 2004; JANKE; TRIVINHO-STRIXINO, 2007;SOUZA et al, 2008, PEREIRA et al, 2010LEITE-ROSSI;TRIVINHO-STRIXINO, 2012). Among the substrates commonly used are mineral, organic, and manufactured material (BENÔIT et al, 1998;CZERNIAWSKA-KUSZA, 2004 MAZÃO, 2012).…”

“…Mining and shredding groups, for example, are easily found in colonization experiments that use plant detritus as substrate (CLAPCOTT;BUNN, 2003;GONÇALVES et al, 2012;LEITE-ROSSI;TRIVINHO-STRIXINO, 2012). Organisms such as Simuliidae larvae and pupae have a habit of attaching to hard substrates, and are found only in experiments using material such as stones, strips of polyethylene, and expanded clay (PEPINELLI; TRIVINHO-STRIXINO, 2002).…”

A decomposição de detritos foliares de espécies nativas e exótica e a colonização de macroinvertebrados em um riacho tropical localizado na Floresta Nacional de Ipanema, SP, Brasil

“…A vegetação ripária tem uma estreita relação com o funcionamento e manutenção da diversidade em riachos, além da influência no estabelecimento das comunidades aquáticas (Maloney et al 2009;Carvalho & Uieda, 2010;Leite-Rossi & Trivinho-Strixino, 2012). Sua remoção tem grandes efeitos sobre estes ecossistemas, já que afeta diretamente o aporte de detritos vegetais e a disponibilidade alimentar dos invertebrados aquáticos (Ardón & Pringle, 2008;Kominoski et al, 2012), gerando assim impactos sobre a composição da fauna de organismos macroinvertebrados.…”