Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/10022
Title: Seasonal variability in plankton community structure, productivity and food web transfer along the salinity gradient of the Baltic Sea
Authors: Postel, L.
Aristegui, J. 
Hernández-León, Santiago 
Gómez, May 
Almeida Peña, Carlos 
Portillo Hahnefeld, Agustín
Packard, Theodore T
Montero del Pino, María F. 
UNESCO Clasification: 251001 Oceanografía biológica
Issue Date: 2009
Abstract: The brackish water environment in the semi‐enclosed Baltic Sea causes changes in plankton community structure in close relation to large‐scale circulation patterns. In addition, seasonal changes in nutrients levels and stoichiometric ratios, light and stratification successively modified it. The analysis of comprehensive data sets on environmental properties, micro and meso‐plankton communities, their metabolic activity and productivity basing on classical and enzymatic methods allows verifying the interplay between community structure and food web transfer from Kattegat to the Gulf of Finland in the ninety nineties. Aspects, like the ratio between new and regenerated production, the percentage of primary productivity utilized by heterotrophs of different size, and the stoichiometry in nutrient regeneration by mesozooplankton were investigated. Regions where new (primary) production was detectable were restricted to areas with river discharge after the spring bloom, but did never exceed some percentages of gross production. Nitrogen and phosphorous were excreted by mesozooplankton in N/P=6 in May and N/P=10 in August in the same region because of the larger percentage of parthenogenetically reproducing cladocerans in summer. Herbivorous plankton
URI: http://hdl.handle.net/10553/10022
Source: <p>Internacional Council for the Exploration of the Sea (ICES), 21-26 Septiembre, Berlin, Alemania, 2009</p>
Rights: by-nc-nd
Appears in Collections:Actas de congresos
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