Variation and life strategies of the Trichoptera (Insecta) larvae community in a first order tributary of the Paquequer River, Southeastern Brazil

Abstract

The Trichoptera fauna was sampled in a first order tributary of Paquequer River, in the district of Teresópolis, Rio de Janerio State. Quantitative samples of litter from pools, litter from riffles, sand, and stones were taken on each season from February 1991 to February 1992. The life cycles of common genera were categorized into three groups of biological strategies. The largest group represented the general profile of the community, in which ultimate instar larvae were predominant in spring and the younger ones in summer. Probably, emergence and oviposition occur in spring.

The role of the hydrological cycle on the temporal patterns of macroinvertebrate assemblages in an Andean foothill stream in Colombia

“…It was further found that the greater abundance of collector-gatherers during high water, collectorfilterers during the dry season and taxa that have both gatherer and filterer FFGs (GC-CF) increased in the La Niña-El Niño transition (disturbance conditions). For example, Leptonema and Smicridea (Hydropsychidae), which build nets in fast flowing habitats and filter drifting material (Huamantinco and Nessimian, 2000;Buss et al, 2004), are equally abundant in rainfall or drought, and even more abundant during the latter. This may be explained because the disturbance has less of an effect on taxa adapted to frequent flooding conditions or with greater dispersal ability, who are the first to recolonize (Winemiller et al, 2010).…”

Factores ambientales asociados con la preferencia de hábitat de larvas de tricópteros en cuencas con bosque seco tropical (Tolima, Colombia)

“…Estos resultados son similares a los reportados por Huamantico & Nessimian (2000), Bispo, Oliveira, Bini & Sousa (2006) y Fidelis, Nessimian & Hamada (2008, quienes indican que estos taxones pueden presentar densidades elevadas en corrientes de tercer y cuarto orden, y están frecuentemente asociados a sustratos rocosos. Por su parte, Hydroptila, Helicopsyche y Grumichella mostraron una alta densidad en las zonas de mayor altitud en los ríos evaluados, lo que sugiere una restricción de estos organismos a la oferta y calidad de sustrato (mayor presencia de hojarasca y grava), variación del régimen de disturbio, tamaño de la corriente y/o a la menor influencia de factores antropogénicos, que afectan la estructura de los ensamblajes de insectos acuáticos (Bispo et al, 2006;Wiens, 2002).…”

Uso De Macroinvertebrados Em Procedimentos De Biomonitoramento Em Ecossistemas Aquáticos

“…Entretanto, para a maioria dos insetos aquáticos que vivem em ambientes provisórios, esses "são programados" a permanecerem como ovos, onde são protegidos até a época do ano em que a água volta ou a temperatura venha a ser manter apropriada a continuidade do desenvolvimento ontogenético. Há muitos outros aspectos que dizem respeito à biologia e a ecologia dos macroinvertebrados que devem ser aprofundados, tais como, variação estacional, distribuição espacial no gradiente longitudinal e latitudinal, variação de ocupação entre os microhabitat, variações da altitude ou entre bacias hidrográfi cas e regimes de vazão (Hawkins & Sedell 1981, Brown & Brussock 1991, Yule & Pearson 1996, Huamantico & Nessimian 2000, Baptista et. al.…”