Journal article
Build-up and decline of organic matter during PeECE III
Biogeosciences, Vol.5, pp.707-718
2008
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Source: InCites
Abstract
<p>Increasing atmospheric carbon dioxide (CO<sub>2</sub>) concentrations due to anthropogenic fossil fuel combustion are currently changing the ocean's chemistry. Increasing oceanic [CO<sub>2</sub>] and consequently decreasing seawater pH have the potential to significantly impact marine life. Here we describe and analyze the build-up and decline of a natural phytoplankton bloom initiated during the 2005 mesocosm Pelagic Ecosystem CO<sub>2</sub> Enrichment study (PeECE III). The draw-down of inorganic nutrients in the upper surface layer of the mesocosms was reflected by a concomitant increase of organic matter until day <em>t</em><sub>11</sub>, the peak of the bloom. From then on, biomass standing stocks steadily decreased as more and more particulate organic matter was lost into the deeper layer of the mesocosms. We show that organic carbon export to the deeper layer was significantly enhanced at elevated CO<sub>2</sub>. This phenomenon might have impacted organic matter remineralization leading to decreased oxygen concentrations in the deeper layer of the high CO<sub>2</sub> mesocosms as indicated by deep water ammonium concentrations. This would have important implications for our understanding of pelagic ecosystem functioning and future carbon cycling.<br /></p>
Details
- Title
- Build-up and decline of organic matter during PeECE III
- Creators
- Kai G Schulz - Leibniz Institute for Marine SciencesU Riebesell - Leibniz Institute for Marine SciencesR GJ Bellerby - University of BergenH Biswas - Leibniz Institute for Marine SciencesM Meyerhofer - Leibniz Institute for Marine SciencesM N Muller - Leibniz Institute for Marine SciencesJ K Egge - University of BergenJ C Nejstgaard - University of BergenC Neill - University of BergenJ Wohlers - Leibniz Institute for Marine SciencesE Zollner - Leibniz Institute for Marine Sciences
- Publication Details
- Biogeosciences, Vol.5, pp.707-718
- Identifiers
- 3016; 991012820745402368
- Academic Unit
- Centre for Coastal Biogeochemistry; School of Environment, Science and Engineering; Faculty of Science and Engineering; Science
- Resource Type
- Journal article