Euglenoid blooms in the floodplain wetlands of Barak Valley, Assam, North eastern India.
J Environ Biol
;
2004 Jul; 25(3): 369-73
Article
Dans Anglais
| IMSEAR
| ID: sea-113616
ABSTRACT
Red blooms of Euglena sp. in the floodplain wetland ecosystems of Barak Valley, Assam, India, were found to be induced by high concentrations of NH3-N, NO3, Fe, Mg and to some extent, PO4, Cu and Zn in their water. The trace elements were rapidly accumulated by the bloom organisms to high levels, whereby their concentrations in the water declined, leading to a collapse of the bloom, which tended to reappear as decomposition again led to the release of the nutrients. The bloom also harboured fairly high density of certain other algae and zooplankton, thereby acting as a sub-system within the wetland ecosystem. The bloom is non-toxic and is exploited as a fish food by the fish-farmers who artificially induce a bloom for augmenting the growth of surface-feeding species of fishes.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Phosphates
/
Phytoplancton
/
Oligoéléments
/
Polluants de l'eau
/
Zooplancton
/
Densité de population
/
Écosystème
/
Environnement
/
Euglena
/
Eucaryotes
Pays comme sujet:
Asie
langue:
Anglais
Texte intégral:
J Environ Biol
Année:
2004
Type:
Article
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