Diatomáceas epilíticas de sistemas lóticos na sub-bacia hidrográfica do Arroio Grande, Rio Grande do Sul, Brasil
| Autor: | Sérgio Luiz de Oliveira Machado, Saionara Eliane Salomoni, Maria Angélica Oliveira, Juliana da Silva |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010506 paleontology
geography geography.geographical_feature_category biology Ecology Drainage basin Pinnularia Plant Science 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Diatom Taxon Navicula Botany Species richness Periphyton Hydrography 0105 earth and related environmental sciences |
| Zdroj: | Iheringia, Série Botânica. 72:201-219 |
| ISSN: | 2446-8231 0073-4705 |
| DOI: | 10.21826/2446-8231201772207 |
| Popis: | Epilithic diatoms are important components of freshwater periphyton. This study aimed to describe the composition and distribution of the epilithic diatom community in thirteen sampling sites in the Arroio Grande hydrographical sub-basin, RS, between October 2012 and March 2013. Samples were cleaned in oxygen peroxide and mounted on permanent slides for identifi cation. The diatom fl ora was composed of 106 species in 23 families and 41 genera. The most representative families and genera in taxa richness were Cymbellaceae (12 taxa), Naviculaceae (11), Sellaphoraceae (10), Gomphonema Ehreberg (10), Sellaphora Mereschkowsky, Nitzchia Hassall (seven), Navicula Bory, and Pinnularia C.G. Ehrenberg (six). Morphometric data for each species are presented. The upper reaches of the river basin presented greater specifi c richness than the lower stretches. This is the fi rst record of the diatom fl ora in this hydrographic basin. |
| Databáze: | OpenAIRE |
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