Gradients in intact polar diacylglycerolipids across the Mediterranean Sea are related to phosphate availability


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dc.contributor.author Popendorf, Kimberly J.
dc.contributor.author Tanaka, T.
dc.contributor.author Pujo-Pay, M.
dc.contributor.author Lagaria, A.
dc.contributor.author Courties, C.
dc.contributor.author Conan, P.
dc.contributor.author Oriol, L.
dc.contributor.author Sofen, L. E.
dc.contributor.author Moutin, T.
dc.contributor.author Van Mooy, Benjamin A. S.
dc.date.accessioned 2012-04-03T14:29:26Z
dc.date.available 2012-04-03T14:29:26Z
dc.date.issued 2011-12-20
dc.identifier.citation Biogeosciences 8 (2011): 3733-3745 en_US
dc.identifier.uri http://hdl.handle.net/1912/5107
dc.description © The Author(s), 2011. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 8 (2011): 3733-3745, doi:10.5194/bg-8-3733-2011. en_US
dc.description.abstract Intact polar membrane lipids compose a significant fraction of cellular material in plankton and their synthesis imposes a substantial constraint on planktonic nutrient requirements. As a part of the Biogeochemistry from the Oligotrophic to the Ultraoligotrophic Mediterranean (BOUM) cruise we examined the distribution of several classes of intact polar diacylglycerolipids (IP-DAGs) across the Mediterranean, and found that phospholipid concentration as a percent of total lipids correlated with phosphate concentration. In addition, the ratios of non-phosphorus lipids to phospholipids – sulfoquinovosyldiacylglycerol (SQDG) to phosphatidylglycerol (PG), and betaine lipids to phosphatidylcholine (PC) – were also found to increase from west to east across the Mediterranean. Additionally, microcosm incubations from across the Mediterranean were amended with phosphate and ammonium, and in the course of several days nutrient amendments elicited a shift in the ratios of IP-DAGs. These experiments were used to assess the relative contribution of community shifts and physiological response to the observed change in IP-DAGs across the Mediterranean. The ratio of SQDG to chlorophyll-a was also explored as an indicator of phytoplankton response to nitrogen availability. This study is the first to demonstrate the dynamic response of membrane lipid composition to changes in nutrients in a natural, mixed planktonic community. en_US
dc.description.sponsorship Funding for this work was provided by a grant from the National Science Foundation (OCE-0646944 and OCE-1031143). en_US
dc.format.mimetype application/pdf
dc.language.iso en en_US
dc.publisher Copernicus Publications on behalf of the European Geosciences Union en_US
dc.relation.uri http://dx.doi.org/10.5194/bg-8-3733-2011
dc.rights.uri http://creativecommons.org/licenses/by/3.0/ *
dc.title Gradients in intact polar diacylglycerolipids across the Mediterranean Sea are related to phosphate availability en_US
dc.type Article en_US
dc.identifier.doi 10.5194/bg-8-3733-2011

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