Impact of grazing on phytoplankton in Lake Pavin (France): Contribution of different zooplankton groups

Autor:	Denise Pépin, Christian Amblard, Catherine Quiblier-Lloberas, Gilles Bourdier
Rok vydání:	1996
Předmět:	Chlorophyll a Ecology Branchiopoda Aquatic Science Biology Plankton biology.organism_classification Zooplankton chemistry.chemical_compound Animal science chemistry Cladocera Grazing Phytoplankton Ecology Evolution Behavior and Systematics Copepod
Zdroj:	Journal of Plankton Research. 18:305-322
ISSN:	1464-3774 0142-7873
DOI:	10.1093/plankt/18.3.305
Popis:	The impact of zooplankton grazing on the phytoplankton community was measured in an oligomesotrophic lake, Lake Pavin (France), during a seasonal study. The feeding activity of various zooplankton groups was determined in the 0-7 and 7-20 m depth layers, by identifying and quantifying chlorophyll a and its derivatives by high-performance liquid chromatography in samples of phyto- plankton and zooplankton. This determination takes into consideration the degradation of these pig- ments into colourless products during their ingestion by zooplankton. A high mean percentage loss, linked with this degradation, has been observed (81.9 ± 11.5%). The grazing impact by the whole zoo- plankton community (expressed as the percentage of water volume swept clear of chlorophyll-contain- ing organisms each day) varied between 1 and 48% day1 in the 0-7 m layer (mean value 17.5% day1), and between 0.2 and 19% day1 in the 7-20 m layer (mean value 3.8% day1). The calanoid copepod Acanthodiaptomus denticomis was the main grazer from April to mid-July, but its impact was relatively low (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3673c2c092c6bb4638178412dd42b54e https://doi.org/10.1093/plankt/18.3.305 Zobrazit plný text záznamu