Consulta: creatorFacets:"Biasi,Cristiane"
Registros recuperados: 3
Data/hora: 29/05/2024 03:37:51

Biological colonization and leaf decomposition in a subtropical stream
Provedor de dados: 67
Autores: Biasi,Cristiane; Cerezer,Cristina; Santos,Sandro.
In small streams, aquatic community obtains energy mainly from leaves of the riparian vegetation. Processing these leaves involves physical, chemical and biological factors that may difer among leaf species. We assessed the efects of litter quality on leaf decomposition and colonization by aquatic invertebrates in a subtropical stream. Leaves from two native, highly represented tree species common in subtropical riparian areas, Ficus luschnathiana and Gasearía sylvestris, were incubated in coarse mesh bags in a stream. Bags were sampled weekly during an incubation of 28 days. The decomposition rates were higher in leaves of F. luschnathiana than in those of C. sylvestris. In the frst seven days of the experiment, leaves of F. luschnathiana lost ~60% of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shredders; Chironomidae; Leaf-toughness; Fungal biomass.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000200008

Shredders prefer soft and fungal-conditioned leaves, regardless of their initial chemical traits
Provedor de dados: 76
Autores: Biasi,Cristiane; Cogo,Gláucia B.; Hepp,Luiz U.; Santos,Sandro.
ABSTRACT Through field and laboratory experiments we investigated the effects of leaf traits of two tree species and microbial conditioning on the abundance, biomass, and feeding preference of a typical macroinvertebrate shredder. In the field, we compared the association of Phylloicus (Calamoceratidae, Trichoptera) with two tree species commonly found in riparian zones, which are representative of high and low nutritional quality, respectively: Nectandra megapotamica and Chusquea tenella. In the laboratory, we investigated the feeding preference of Phylloicus using unconditioned leaves and leaves conditioned by aquatic fungi. The same tree species used in the field experiment were used in the laboratory. Initially, C. tenella leaves were proved to be more...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phylloicus; C:N ratio; Feeding preference; Leaf toughness; Hyphomycetes.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100204

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