Epipsammic diatoms in streams influenced by urban pollution, São Carlos, SP, Brazil

Brazilian Journal of Biology

T. Bere¹  Jg. Tundisi¹ 

[1] ,Instituto Internacional de EcologiaSão Carlos SP ,Brasil

关键词: diatom communities;    pollution;    environmental gradients;    biological monitoring;    comunidades de diatomáceas;    poluição;    gradientes ambientais;    monitoramento biológico;   

DOI  :  10.1590/S1519-69842010000500002

来源: SciELO

【 摘 要 】

Epipsammic diatoms have important implications for ecosystem processes in lotic environments. Most of the studies on benthic diatoms concentrate on epilithic diatoms and very little is known about epipsammic diatoms. The objective of this study was to assess epipsammic diatom communities in streams in relation to environmental conditions. Epipsammic diatoms and water quality sampling was done at 7 sites during summer base flow period (2008). Forward stepwise multiple regression and canonical correspondence analysis (CCA) were used to determine environmental gradients along which species vary with physical and chemical variables. A total of 112 diatom species distributed among 44 genera were recorded. Altitude and the process of eutrophication played a significant role in structuring diatom communities in the study region.

【 授权许可】

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