Regulation of photosynthesisand oxygen consumption ina hypersaline cyanobacterialmat (Camargue, France)byirradiance, temperatureandsalinity

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Show simple item record Wieland, Andrea en_US Kuhl, Michael en_US
dc.contributor.editor en_US 2011-02-07T06:20:03Z 2011-02-07T06:20:03Z 2006 en_US
dc.identifier 2009005261 en_US
dc.identifier.citation Wieland A. and Kuhl Michael 2006, 'Regulation of photosynthesisand oxygen consumption ina hypersaline cyanobacterialmat (Camargue, France)byirradiance, temperatureandsalinity', Wiley-Blackwell Publishing Ltd., vol. 55, no. 2, pp. 195-210. en_US
dc.identifier.issn 0168-6496 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Short-term effects of irradiance (0?1560 ?mol photons m-2 s-1), temperature (10?25?C), and salinity (40?160) on oxygenic photosynthesis and oxygen consumption in a hypersaline mat (Salin-de-Giraud, France) were investigated with microsensors under controlled laboratory conditions. Dark O2 consumption rates were mainly regulated by the mass transfer limitations imposed by the diffusive boundary layer. Areal rates of net photosynthesis increased with irradiance and saturated at irradiances >400 ?mol photons m-2 s-1. At low irradiances, oxygen consumption increased more strongly with temperature than photosynthesis, whereas the opposite was observed at saturating irradiances. Net photosynthesis vs. irradiance curves were almost unaffected by decreasing salinity (100 to 40), whereas increasing salinities (100 to 160) led to a decrease of net photosynthesis at each irradiance. Dark O2 consumption rates, maximal gross and net photosynthesis at light saturation were relatively constant over a broad salinity range (60?100) and decreased at salinities above the in situ salinity of 100. Within the range of natural variation, temperature was more important than salinity in regulating photosynthesis and oxygen consumption. At higher salinities the inhibitory impact of salinity on these processes and therefore the importance of salinity as a regulating environmental parameter increased, indicating that in more hypersaline systems, salinity has a stronger limiting effect on microbial activity. en_US
dc.language en_US
dc.publisher Wiley-Blackwell Publishing Ltd. en_US
dc.relation.isbasedon en_US
dc.title Regulation of photosynthesisand oxygen consumption ina hypersaline cyanobacterialmat (Camargue, France)byirradiance, temperatureandsalinity en_US
dc.parent F E M S Microbiology Ecology en_US
dc.journal.volume 55 en_US
dc.journal.number 2 en_US
dc.publocation United Kingdom en_US
dc.identifier.startpage 195 en_US
dc.identifier.endpage 210 en_US SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 060500 en_US
dc.personcode 0000062139 en_US
dc.personcode 107129 en_US
dc.percentage 100 en_US Microbiology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords microsensors ? temperature ? salinity ? microbial mat ? photosynthesis ? oxygen turnover en_US
dc.staffid en_US
dc.staffid 107129 en_US

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