Chemical composition of tropical macrophyte Echinochloa polystachya (HBK) Hitchcock in Jurumirim Reservoir (Sao paulo, Brazil)
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Data
1999-01-01
Autores
Pompeo, MLM
Henry, R.
Moschini-Carlos, V
Título da Revista
ISSN da Revista
Título de Volume
Editor
Kluwer Academic Publ
Resumo
Seasonal variations of C, N and P concentrations and stocks in the emergent macrophyte Echinochloa polystachya (H.B.K.) Hitchcock, of the Paranapanema River mouth zone at Jurumirim Reservoir (SP, Brazil), were examined. Marked variation in nutrient concentrations (from 287.6 to 463.2 mg C g DW-1; 3.4 to 37.8 mg N g DW-1; 0.13 to 2.31 mg P g DW-1) and stocks (from 3.8 to 11.9 t C ha(-1); 96.3 to 400.6 kg N ha(-1), 3.6 to 44.3 kg P ha(-1)) were observed along the year (August 1993 - July 1994). Peaks in concentrations and stocks were observed in January, February and March 1994. As nutrient concentrations in water and sediments are low and stocks in the plant high, the local nutrient dynamics seem to be controlled by this macrophyte. Leaf blades and sheaths participate most in recycling, while stems contain the principal nutrient stock.
Descrição
Palavras-chave
macrophyte, Echinochloa polystachya, chemical composition, reservoir
Como citar
Hydrobiologia. Dordrecht: Kluwer Academic Publ, v. 411, p. 1-11, 1999.