Warming but not enhanced CO2 quantitatively and qualitatively affects phytoplankton biomass

Paul, Carolin, Matthiessen, Birte and Sommer, Ulrich (2014) Warming but not enhanced CO2 quantitatively and qualitatively affects phytoplankton biomass [Talk] In: 15. Scientific Conference of the Phycology Section of the German Botanical Society, Stralsund, 23.-26.02.2014, Stralsund, Germany .

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Abstract

We investigated the impacts of ocean acidification and future warming on the quantity
and nutritional quality of a natural phytoplankton autumn bloom in a mesocosm
experiment. Since the effects of CO2-enrichment and temperature have usually been
studied in isolation, we were also interested in the interactive effects of both aspects
of climate change. In that way we used a factorial design with two temperature and
two acidification levels for our mesocosm experiment with a Baltic Sea phytoplankton
community. Our results report a significant influence of warming as average and
maximal phytoplankton carbon decreased significantly with increasing temperature.
Additionally fatty acid composition changed with increasing temperature and
biomass. Impacts of CO2 or synergetic effects of warming and acidification could not
be detected. Nevertheless our analyses suggest that biological effects of warming on
Baltic Sea phytoplankton are considerable and will influence the food cycle in case of
food quantity as well as quality.

Document Type: Conference or Workshop Item (Talk)
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Projects: BIOACID
Date Deposited: 22 Apr 2014 07:46
Last Modified: 09 May 2016 09:27
URI: http://oceanrep.geomar.de/id/eprint/24318

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