Effects of rising temperature on pelagic biogeochemistry in mesocosm systems: a comparative analysis of the AQUASHIFT Kiel experiments.

Wohlers-Zöllner, Julia, Biermann, Antje, Engel, Anja , Dörge, Petra, Lewandowska, Aleksandra M., Scheibner, Markus and Riebesell, Ulf (2012) Effects of rising temperature on pelagic biogeochemistry in mesocosm systems: a comparative analysis of the AQUASHIFT Kiel experiments. Marine Biology, 159 . pp. 2503-2518. DOI 10.1007/s00227-012-1958-x.

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Abstract

A comparative analysis of data, obtained during four indoor-mesocosm experiments with natural spring plankton communities from the Baltic Sea, was conducted to investigate whether biogeochemical cycling is affected by an increase in water temperature of up to 6 °C above present-day conditions. In all experiments, warming stimulated in particular heterotrophic bacterial processes and had an accelerating effect on the temporal development of phytoplankton blooms. This was also mirrored in the build-up and partitioning of organic matter between particulate and dissolved phases. Thus, warming increased both the magnitude and rate of dissolved organic carbon (DOC) build-up, whereas the accumulation of particulate organic carbon (POC) and phosphorus (POP) decreased with rising temperature. In concert, the observed temperature-mediated changes in biogeochemical components suggest strong shifts in the functioning of marine pelagic food webs and the ocean’s biological carbon pump, hence providing potential feedback mechanisms to Earth’s climate system.

Document Type: Article
Additional Information: WOS:000310586900012
Keywords: AQUASHIFT; climate change; temperature; DISSOLVED ORGANIC-MATTER; EXOPOLYMER PARTICLES TEP; CLIMATE-CHANGE; DIATOM BLOOM; SPRING BLOOM; BACTERIOPLANKTON PRODUCTION; SURFACE WATERS; CARBON FLUX; NORTH-SEA; OCEAN
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/s00227-012-1958-x
ISSN: 0025-3162
Projects: AQUASHIFT, Future Ocean
Date Deposited: 21 Sep 2012 09:41
Last Modified: 29 Jun 2018 11:47
URI: http://oceanrep.geomar.de/id/eprint/15318

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