Interactive effect of warming, nitrogen and phosphorus limitation on phytoplankton cell size.

Peter, Kalista Higini and Sommer, Ulrich (2015) Interactive effect of warming, nitrogen and phosphorus limitation on phytoplankton cell size. Open Access Ecology and Evolution, 5 (5). pp. 1011-1024. DOI 10.1002/ece3.1241.

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Abstract

Cell size is one of the ecologically most important traits of phytoplankton. The cell size variation is frequently related to temperature and nutrient limitation. In order to disentangle the role of both factors, an experiment was conducted to determine the possible interactions of these factors. Baltic Sea water containing the natural plankton community was used. We performed a factorial combined experiment of temperature, type of nutrient limitation (N vs. P), and strength of nutrient limitation. The type of nutrient limitation was manipulated by altering the N:P ratio of the medium (balanced, N and P limitation) and strength by the dilution rate (0% and 50%) of the semicontinuous cultures. The negative effect of temperature on cell size was strongest under N limitation, intermediate under P limitation, and weakest when N and P were supplied at balanced ratios. However, temperature also influenced the intensity of nutrient imitation, because at higher temperature there was a tendency for dissolved nutrient concentrations to be lower, while the C:N or C:P ratio being higher... higher at identical dilution rates and medium composition. Analyzing the response of cell size to C:N ratios (as index of N limitation) and C:P ratios (as index of P limitation) indicated a clear dominance of the nutrient effect over the direct temperature effect, although the temperature effect was also significant.

Document Type: Article
Additional Information: WOS:000350647800002
Keywords: Cell size; Nutrient limitation; Phytoplankton; Temperature
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1002/ece3.1241
ISSN: 2045-7758
Date Deposited: 12 Mar 2015 08:52
Last Modified: 24 May 2019 11:55
URI: http://oceanrep.geomar.de/id/eprint/28000

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