Data/hora: 06/06/2024 03:38:14

Provedor de dados: | 88
País: | Brazil
Título: | Ecological distribution of Cyanophyceae in lotic ecosystems of São Paulo State
Autores: | BRANCO,LUIS HENRIQUE Z.; NECCHI JÚNIOR,ORLANDO; BRANCO,CIRO CESAR Z.
Data: | 2001-03-01
Ano: | 2001
Palavras-chave: | Cyanophyceae; Ecological distribution; Conductance; Streams; Brazil.
Resumo: | A hundred seventy two stream reaches from six distinct natural regions (parts of biomes or geological areas) in São Paulo State (Atlantic Rainforest, Cerrado, Hard Water regions, Northwest region, Subtropical Rainforest, and Tropical Rainforest) were searched for the most representative macroscopic Cyanophyceae of phytobenthic communities. Selected ecological parameters were analyzed in each stream segment: conductance, current velocity, oxygen saturation, pH, turbidity, and water temperature. Algal abundance was evaluated as percentage cover. Thirthy four cyanophyte taxa were identified and Phormidium retzii was the most widespread species throughout the State, occurring in all studied regions, except in hard water areas, and was negatively correlated to conductance. The subtropical Rainforest region presented the highest mean species richness per site, whereas the tropical Rainforest region had the highest abundance (percentage cover) of blue-green algae. Correlation tests revealed that conductance was significantly and negatively related to variations in abundance and richness of cyanophyte in streams of São Paulo State. This relationship probably reflects the ability of blue-green algae to grow at medium to low ion content and to take advantage under nutrient stress conditions.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100011
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042001000100011
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.24 n.1 2001
Fonte: | info:eu-repo/semantics/openAccess