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| Manzotti,Angelo Rodrigo; Ceneviva-Bastos,Mônica; Teresa,Fabrício Barreto; Casatti,Lilian. |
| ABSTRACT Habitat homogenization has been a major impact in stream ecosystems, and it is considered one of the main drivers of biotic homogenization as well, leading to the loss of water quality and fish diversity. In this study, we added artificial woody structures and leaf packs in physically impacted streams to test if the additions can improve habitat complexity and change the taxonomic and functional structure of fish communities. The experiment was done in eight streams impacted by siltation, deforestation, and habitat homogeneization, inserted in an agricultural landscape from the Upper Paraná River Basin, and lasted 112 days. The provision of artificial microhabitats increased instream habitat diversity by creating patches of organic matter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Habitat Management; Neotropical streams; Structural Complexity; Woody debris. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000100204 |
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| Basualdo,Carola V.. |
| Non-parametric estimators allow to compare the estimates of richness among data sets from heterogeneous sources. However, since the estimator performance depends on the species-abundance distribution of the sample, preference for one or another is a difficult issue. The present study recovers and revalues some criteria already present in the literature in order to choose the most suitable estimator for streams macroinvertebrates, and provides some tools to apply them. Two abundance and four incidence estimators were applied to a regional database at family and genus level. They were evaluated under four criteria: sub-sample size required to estimate the observed richness; constancy of the sub-sample size; lack of erratic behavior and similarity in curve... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Richness estimation; Neotropical streams; Environmental management. |
| Ano: 2011 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802011000100003 |
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| Pera, Carolina Costa; Universidade Estadual de Maringá; Zanatta, Naiara; Universidade Estadual de Maringá; Sacramento, Patricia Almeida; Universidade Estadual de Maringá; Cionek, Vivian de Melo; Universidade Estadual de Maringá; Benedito, Evanilde; Universidade Estadual de Maringá. |
| Conservation Units (CU) aim to contribute to the balance between human and environmental demand, by protecting natural resources and biological communities. In this study we examined the differences in the attributes of the fish community in four stretches of an urban stream, two inside and two outside the CU, without vegetation cover, and tested the hypothesis that the presence of riparian vegetation is positively reflected in the attributes of fish fauna. Five species were caught, distributed into four orders and five families. Attributes like richness, abundance, dominance, Shannon-Wiener diversity, and evenness were estimated and significant differences were detected for continuous stretches considering stream flow direction. The first stretches (URBI... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish fauna; Conservation units; Neotropical streams; Pollution; Urbanization Ecologia Aplicada. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/16592 |
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