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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
21/05/1998 |
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Data da última atualização: |
09/05/2017 |
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Autoria: |
BONETTO, C. A.; BONETTO, A. A.; ZALOCAR, Y. |
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Afiliação: |
Becarios del CONICET-CECOAL, C.C., Corrientes. Miembro de la Carrera del Investigador Cientifico del CONICET, Argentina. |
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Título: |
Contribucion al conocimiento limnologico del rio Paraguay en su tramo inferior. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Ecosur, Argentina, v.8, n.16, p.55-88, set., 1981. |
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Idioma: |
Espanhol |
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Conteúdo: |
The main limnological feactures of the Paraguay river have been studied in two sampling sites: La Herradura and Puerto Bermejo stations. The former is situated above the confluence with the Bermejo river and the latter is located below the confluence. The phytoplankton community has been dominated by Diatomophyceae (mainly Melosira granulata) and Chlophyceae (mainly Monoraphidium, Schroederia and Scenedesmus). Crytophyceae (Cryptonomas) and Dinophyceae (Peridinium) have always been present in low percentage. Cyanophyceae have usually been less than 4% of the total population density. In the low water of the summer 1978-1979, the maximum phytoplankton density was estimated in 4 000 ind./ml and the production in 750 mg C/m2d. During the flood period of May through October the lowest phytoplankton density (160 ind./ml) and production (60 mg C/m2 d) were measured. Variations in the suspensed solid content and salinity of the water are discussed in relation to the hidrologic regime of the river. The huge amount of sediments carried by the Bermejo river to the Lower Paraguay produces a drastic decrease in the transparency, phytoplankton density and production of the waters. On the other hand, conductivity, suspended solids and nutrients are highly increased. |
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Palavras-Chave: |
Phytoplancton; Rio Paraguai. |
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Thesagro: |
Fisiologia; Fitoplâncton; Limnologia. |
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Thesaurus Nal: |
limnology; Pantanal; Paraguay River; physiology. |
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Categoria do assunto: |
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Marc: |
LEADER 01937naa a2200253 a 4500
001 1792442
005 2017-05-09
008 1981 bl --- 0-- u #d
100 1 $aBONETTO, C. A.
245 $aContribucion al conocimiento limnologico del rio Paraguay en su tramo inferior.
260 $c1981
520 $aThe main limnological feactures of the Paraguay river have been studied in two sampling sites: La Herradura and Puerto Bermejo stations. The former is situated above the confluence with the Bermejo river and the latter is located below the confluence. The phytoplankton community has been dominated by Diatomophyceae (mainly Melosira granulata) and Chlophyceae (mainly Monoraphidium, Schroederia and Scenedesmus). Crytophyceae (Cryptonomas) and Dinophyceae (Peridinium) have always been present in low percentage. Cyanophyceae have usually been less than 4% of the total population density. In the low water of the summer 1978-1979, the maximum phytoplankton density was estimated in 4 000 ind./ml and the production in 750 mg C/m2d. During the flood period of May through October the lowest phytoplankton density (160 ind./ml) and production (60 mg C/m2 d) were measured. Variations in the suspensed solid content and salinity of the water are discussed in relation to the hidrologic regime of the river. The huge amount of sediments carried by the Bermejo river to the Lower Paraguay produces a drastic decrease in the transparency, phytoplankton density and production of the waters. On the other hand, conductivity, suspended solids and nutrients are highly increased.
650 $alimnology
650 $aPantanal
650 $aParaguay River
650 $aphysiology
650 $aFisiologia
650 $aFitoplâncton
650 $aLimnologia
653 $aPhytoplancton
653 $aRio Paraguai
700 1 $aBONETTO, A. A.
700 1 $aZALOCAR, Y.
773 $tEcosur, Argentina$gv.8, n.16, p.55-88, set., 1981.
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Registro original: |
Embrapa Pantanal (CPAP) |
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