Consulta: creatorFacets:"Milesi,Silvia V."
Registros recuperados: 2
Data/hora: 04/06/2024 00:40:51

Nestedness of stream insects in Subtropical region: importance of inter-annual temporal scale
Provedor de dados: 76
Autores: Hepp,Luiz U.; Milesi,Silvia V.; Nava,Diane; Restello,Rozane M.
ABSTRACT Stream insects use in different ways the stream habitats which affect patterns of species occurrence on stream. The nestedness is one of these patterns being an ecological mechanism that generates beta diversity. In this study, we verify the effects of temporal environmental variations on nestedness patterns of Chironomidae assemblages on subtropical streams. We collected chironomid larvae during winter and summer during three years (2010, 2011 and 2012) in Brazilian Subtropical low-order streams (Erechim, state of Rio Grande do Sul, Brazil). We measured environmental variables in each stream. To assess if assemblages will show nested patterns intra- and interannual we used a NODF metric. We observed nestedness only in one year, this pattern was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic forest streams; Beta-diversity; Chironomidae; Climate changes; Conservation.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212021000100205

Effects of agricultural and urban impacts on macroinvertebrates assemblages in streams (Rio Grande do Sul, Brazil)
Provedor de dados: 103
Autores: Hepp,Luiz Ubiratan; Milesi,Silvia V.; Biasi,Cristiane; Restello,Rozane M.
This study evaluates the effects of agricultural and urban activities on the structure and composition of benthic communities of streams in the state of Rio Grande do Sul, Brazil. Benthic macroinvertebrates were collected in streams influenced by urbanization and agriculture and in streams with no anthropogenic disturbances (reference streams). Organism density was superior in urban streams when compared with streams in the other two areas. The taxonomic richness and Shannon diversity index were higher in reference streams. The benthic fauna composition was significantly different among land uses. The classification and ordination analyses corroborated the results of variance analyses demonstrating the formation of clusters corresponding to streams with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomonitoring; Environmental quality; Land uses.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100016