Effet de l'enrichissement continu en nitrates sur les populations de Diatomées isolées à l'aide d'enceintes expérimentales placées dans un étang oligotrophe | Zendy

le Cohu René | Zendy

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Effet de l'enrichissement continu en nitrates sur les populations de Diatomées isolées à l'aide d'enceintes expérimentales placées dans un étang oligotrophe

Author(s) -

le Cohu René

Publication year - 1976

Publication title -

internationale revue der gesamten hydrobiologie und hydrographie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.524

H-Index - 52

eISSN - 1522-2632

pISSN - 0020-9309

DOI - 10.1002/iroh.19760610605

Subject(s) - fragilaria , diatom , chemistry , biology , botany , ecology , nutrient , phytoplankton

The influence of nitrates (NH 4 NO 3 KNO 3 and Ca(NO 3)2 ) on Diatom populations has been studied. These populations were isolated by enclosures with transparent walls, without bottom or lid, placed in an oligotrophic pond. The addition of NH 4 NO 3 generally resulted in a decrease in the number of Diatoms and the disappearance of some species. The addition of KNO 3 and Ca(NO 3)2 was followed, during some periods, by a very important increase of Achnanthes minutissima, Fragilaria construens and Gomphonema parvulum .

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