Diversity and spatial and temporal variation of benthic macroinvertebrates with respect to the trophic state of Lake Figueira in the South of Brazil

Abstract

Benthic macroinvertebrates are widely used in evaluations of environmental impact and recommended in biomonitoring, but little used in Brazilian lentic environments. One of the main objectives has been to explain and predict the distribution of those species according to environmental characteristics. Thus, the study aims to characterize the predominant fauna of the Lake Figueira sediment and its relationship with organic matter and depth, analyzing seasonal variation in communities and aiming to select bioindicators of the trophic state. Sampling was carried out from January 2008 to January 2009, along the lagoon fetch, with an Ekmann-Birge dredge (area 225 cm²). Taxon richness was not significantly related with depth and organic matter content, but those variables were highly correlated (r = 0.962; r² = 0.926 and p < 0.001). The constant oxygenation of the whole water column allows the occurrence of organisms, independent of depth and organic matter content. Chironomidae was the most abundant taxon and from the frequency of occurrence, abundance and clustering analysis it was possible to select Larsia sp. , Goeldichironomus maculatus, Xenochironomus sp. , Aedokritus sp. Cladopelma forcipis, Cryptochironomus brasiliensis, Nilothauma sp.1 and Caladomyia sp. C, Tanytarsus sp. , Tanytarsus rhabdomantis and Chironomus gr. salinarius as potential indicators related with the spatiotemporal faunal distribution of Lake Figueira.

Environmental drivers of the benthic macroinvertebrates community in a hypersaline estuary (Northeastern Brazil)

“…Despite the abundance did not significantly differ between the sandy and muddy substrates in the study area, other studies show that sediment composition is a major factor in structuring the macrofauna (e.g., Hewitt et al, 2005;Lima et al, 2013) since these organisms have benthic life mode. In this context, we suggest that future studies should be carried out using precise techniques for sediment classification.…”

“…These organisms play critical roles in these ecosystems acting in the energy flow to higher trophic levels and in the decomposition of organic matter (Abílio et al, 2007), among other functions in the ecosystem. The distribution of benthic macroinvertebrate community has been studied, in order to understand the functioning of the estuarine ecosystem and understanding the mechanisms structuring the benthic macroinvertebrate community (Hewitt et al, 2005;Lima et al, 2013;Blanchet et al, 2014).…”

The role of environmental and spatial factors in the assembly of aquatic insect communities in southern Brazilian temporary ponds

“…This is also the season that is known to match the peak in the abundance and richness of many aquatic invertebrate taxa in the region (Lima et al . 2013). Specimens were collected with a frame dip‐net (30‐cm wide; 250‐μm mesh size).…”

“…Insect collection was carried out in the early spring of 2015 (from September to October; austral season), during the wet phase of the ponds (Bertuzzi et al 2019;Knauth et al 2019). This is also the season that is known to match the peak in the abundance and richness of many aquatic invertebrate taxa in the region (Lima et al 2013). Specimens were collected with a frame dip-net (30-cm wide; 250-μm mesh size).…”

Mecanismos de favelização e segregação urbana: Considerações acerca das áreas de risco, prevenção e solução de desastres ambientais.

“…Larvas de Polypedilum são registradas em alta abundância em ecossistemas de águas mornas, rasas, eutrofizados, sujeitas à secagem e ambientes artificiais (JACOBSON; PERRY, 2007). O gênero Cladopelma é relacionado a ambientes com concentrações elevadas de matéria orgânica e, ocorre em maiores abundâncias em períodos de estiagem(LIMA et al, 2013). Diferente dos dois gêneros anteriores, o Tanytarsus tem sido relacionado, mais frequentemente, a ambientes com menores cargas de poluição, tendo em vista que apresentam pouca hemoglobina em sua linfa o que os torna mais sensíveis à degradação ambiental(KUZMANOVIC et al, 2017).…”