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A predictive multimetric index based on macroinvetebrates for Atlantic Forest wadeable streams assessment Biota Neotropica
Oliveira,Renata Bley da Silveira de; Mugnai,Riccardo; Pereira,Priscilla da Silva; Souza,Natália Freitas de; Baptista,Darcílio Fernandes.
Abstract: Multimetric Indices (MMIs) have been widely applied for ecological assessment in freshwater ecosystems. Most MMIs face difficulties when scaling up from small spatial scales because larger scales usually encompass great environmental variability. Covariance of anthropogenic pressures with natural environmental gradients can be a confounding factor in assessing biologic responses to anthropogenic pressures. This study presents the development and validation of a predictive multimetric index to assess the ecological condition of Atlantic Forest wadeable streams using benthic macroinvertebrates. To do so, we sampled 158 sites for the index development. We adjusted each biological metric to natural variation through multiple regression analyses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomonitoring; Bioassessment protocol; Aquatic ecosystem; Multimetric index; Macroinvertebrate.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200215
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Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams Rev. Bras. Zool.
Ávila,Milton P.; Carvalho,Rafaela Neves; Casatti,Lilian; Simião-Ferreira,Juliana; Morais,Lorrane Faria de; Teresa,Fabrício B..
ABSTRACT The development of effective monitoring tools depends on finding sensitive metrics that are capable of detecting the most important environmental impacts at a given region. We assessed if metrics derived from stream fish assemblages reflect physical habitat degradation and changes in land cover. We sampled the ichthyofauna and environmental characteristics of 16 stream sites of first and second order in the Upper Tocantins River basin. The streams were classified according to their environmental characteristics into reference (n = 5), intermediate (n = 4), and impacted (n = 7). A total of 4,079 individuals in five orders, 12 families, and 30 species were collected. Of the 20 metrics tested, eight were non-collinear and were tested for their...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioindicators; Brazilian savannah; Fish fauna; Multimetric index.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100303
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