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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Distance decay as a descriptor of the diatom compositional variation in tropical reservoirs

Texto completo
Autor(es):
Marquardt, Gisele C. [1] ; Blanco, Saul [2] ; Bicudo, Carlos E. de M. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Inst Bot, Dept Ecol, Ave Miguel Estefano 3687, BR-04301012 Sao Paulo, SP - Brazil
[2] Inst Environm, La Serna 58, E-24007 Leon - Spain
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: MARINE AND FRESHWATER RESEARCH; v. 69, n. 1, p. 105-113, 2018.
Citações Web of Science: 2
Resumo

In the present study, distance decay was used as a descriptor of the compositional variation in diatom communities' similarity between different habitats (phytoplankton and surface sediment) and seasons (summer and winter; only for phytoplankton) along a geographical gradient of similar to 64 km over six reservoirs located in south-east Brazil. Whether rates of decay in similarity changed with distance in tropical biological communities was tested, and the degree to which dispersal (geographic distance) and niche (habitat association) processes explain variation in the diatom communities was estimated. In addition, whether the diatom assemblage captured in the surface sediment reflected the water column assemblage events was evaluated. Distance-decay curves were estimated using linear regressions. Partial Mantel tests were performed to examine the significance of relationships among the biological, environmental and spatial datasets. Similarity decreased significantly with distance between habitats and seasons, but the results were not statistically significant for surface sediment assemblages. All diatom communities were controlled more by limited dispersal than by environmental factors, probably as a result of the water quality and scale of the study area. (AU)

Processo FAPESP: 98/04955-3 - Flora ficológica do estado de São Paulo
Beneficiário:Carlos Eduardo de Mattos Bicudo
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 09/53898-9 - Reconstrução paleolimnológica da Represa Guarapiranga e diagnóstico da qualidade atual da água e dos sedimentos de mananciais da RMSP com vistas ao gerenciamento do abastecimento
Beneficiário:Carlos Eduardo de Mattos Bicudo
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 13/10314-2 - Comparação da biodiversidade e distribuição das diatomáceas planctônicas, perifíticas e de sedimentos superficiais em seis reservatórios no sul do estado de São Paulo
Beneficiário:Gisele Carolina Marquardt
Linha de fomento: Bolsas no Brasil - Doutorado