Artigo

Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation

This study assessed the results of anthropogenic sediment input on macroinvertebrate trophic structure in streams located in an area of oil and natural gas exploitation in Brazil's Amazon forest. The results indicate that macroinvertebrate communities both in streams impacted by anthropogenic sedime...

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Autor principal: Couceiro, Sheyla R.M.
Outros Autores: Hamada, Neusa, Forsberg, Bruce Rider, Padovesi-Fonseca, Claudia
Grau: Artigo
Idioma: English
Publicado em: Austral Ecology 2020
Assuntos:
Oil
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/18150
id oai:repositorio:1-18150
recordtype dspace
spelling oai:repositorio:1-18150 Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation Couceiro, Sheyla R.M. Hamada, Neusa Forsberg, Bruce Rider Padovesi-Fonseca, Claudia Anthropogenic Effect Benthos Community Structure Degradation Ecological Impact Energy Resource Exploitation Food Web Functional Group Human Activity Leaf Macroinvertebrate Natural Gas Neotropical Region Oil Particulate Organic Matter Population Density Siltation Streamwater Suspended Sediment Trophic Structure Amazonas Brasil Hexapoda This study assessed the results of anthropogenic sediment input on macroinvertebrate trophic structure in streams located in an area of oil and natural gas exploitation in Brazil's Amazon forest. The results indicate that macroinvertebrate communities both in streams impacted by anthropogenic sediments and in non-impacted streams are composed mainly of taxa in the following functional feeding groups: predators, gathering-collectors, scrapers, shredders and filtering-collectors. The highest densities were observed for collector-gatherers, followed by scrapers, predators, shredders and filtering-collectors. However, both the richness and the density of all groups were reduced in impacted streams. The reductions were significantly related to suspended inorganic sediment load and to the colour of suspended sediments. The relative proportion of shredders in streams impacted by anthropogenic sediments was significantly reduced as compared with the proportion observed in non-impacted streams. This resulted from lower availability of coarse particulate organic matter in these streams owing to burial of leaves and other plant material. These results indicate changes in the functioning and productivity of streams owing to anthropogenic siltation. This is because the benthic macroinvertebrate communities, sampled during this study, were dependent on the degradation of leaves, which are the primary energy source sustaining the benthic foodweb. © 2010 The Authors. Journal compilation © 2010 Ecological Society of Australia. 2020-06-15T21:52:03Z 2020-06-15T21:52:03Z 2011 Artigo https://repositorio.inpa.gov.br/handle/1/18150 10.1111/j.1442-9993.2010.02198.x en Volume 36, Número 6, Pags. 628-637 Restrito Austral Ecology
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Anthropogenic Effect
Benthos
Community Structure
Degradation
Ecological Impact
Energy Resource
Exploitation
Food Web
Functional Group
Human Activity
Leaf
Macroinvertebrate
Natural Gas
Neotropical Region
Oil
Particulate Organic Matter
Population Density
Siltation
Streamwater
Suspended Sediment
Trophic Structure
Amazonas
Brasil
Hexapoda
spellingShingle Anthropogenic Effect
Benthos
Community Structure
Degradation
Ecological Impact
Energy Resource
Exploitation
Food Web
Functional Group
Human Activity
Leaf
Macroinvertebrate
Natural Gas
Neotropical Region
Oil
Particulate Organic Matter
Population Density
Siltation
Streamwater
Suspended Sediment
Trophic Structure
Amazonas
Brasil
Hexapoda
Couceiro, Sheyla R.M.
Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation
topic_facet Anthropogenic Effect
Benthos
Community Structure
Degradation
Ecological Impact
Energy Resource
Exploitation
Food Web
Functional Group
Human Activity
Leaf
Macroinvertebrate
Natural Gas
Neotropical Region
Oil
Particulate Organic Matter
Population Density
Siltation
Streamwater
Suspended Sediment
Trophic Structure
Amazonas
Brasil
Hexapoda
description This study assessed the results of anthropogenic sediment input on macroinvertebrate trophic structure in streams located in an area of oil and natural gas exploitation in Brazil's Amazon forest. The results indicate that macroinvertebrate communities both in streams impacted by anthropogenic sediments and in non-impacted streams are composed mainly of taxa in the following functional feeding groups: predators, gathering-collectors, scrapers, shredders and filtering-collectors. The highest densities were observed for collector-gatherers, followed by scrapers, predators, shredders and filtering-collectors. However, both the richness and the density of all groups were reduced in impacted streams. The reductions were significantly related to suspended inorganic sediment load and to the colour of suspended sediments. The relative proportion of shredders in streams impacted by anthropogenic sediments was significantly reduced as compared with the proportion observed in non-impacted streams. This resulted from lower availability of coarse particulate organic matter in these streams owing to burial of leaves and other plant material. These results indicate changes in the functioning and productivity of streams owing to anthropogenic siltation. This is because the benthic macroinvertebrate communities, sampled during this study, were dependent on the degradation of leaves, which are the primary energy source sustaining the benthic foodweb. © 2010 The Authors. Journal compilation © 2010 Ecological Society of Australia.
format Artigo
author Couceiro, Sheyla R.M.
author2 Hamada, Neusa
Forsberg, Bruce Rider
Padovesi-Fonseca, Claudia
author2Str Hamada, Neusa
Forsberg, Bruce Rider
Padovesi-Fonseca, Claudia
title Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation
title_short Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation
title_full Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation
title_fullStr Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation
title_full_unstemmed Trophic structure of macroinvertebrates in Amazonian streams impacted by anthropogenic siltation
title_sort trophic structure of macroinvertebrates in amazonian streams impacted by anthropogenic siltation
publisher Austral Ecology
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/18150
_version_ 1787142606784823296
score 11.755432