Regulation of photosynthesis and oxygen consumption in a hypersaline cyanobacterial mat (Camargue, France) by irradiance, temperature and salinity

DSpace/Manakin Repository

Search OPUS

Advanced Search


My Account

Show simple item record Wieland, A Kühl, M 2011-02-07T06:20:03Z 2006-02
dc.identifier.citation FEMS Microbiology Ecology, 2006, 55 (2), pp. 195 - 210
dc.identifier.issn 0168-6496
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Short-term effects of irradiance (0-1560 μmol 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 μmol 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. © 2005 Federation of European Microbiological Societies Published by Blackwell Publishing Ltd. All rights reserved.
dc.language eng
dc.relation.isbasedon 10.1111/j.1574-6941.2005.00031.x
dc.title Regulation of photosynthesis and oxygen consumption in a hypersaline cyanobacterial mat (Camargue, France) by irradiance, temperature and salinity
dc.type Journal Article
dc.description.version Published
dc.parent FEMS Microbiology Ecology
dc.journal.volume 2
dc.journal.volume 55
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 0605 Microbiology
dc.personcode 107129
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 Microbial mat
dc.description.keywords Microsensors
dc.description.keywords Oxygen turnover
dc.description.keywords Photosynthesis
dc.description.keywords Salinity
dc.description.keywords Temperature
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc false
utslib.collection.history Closed (ID: 3)

Files in this item

This item appears in the following Collection(s)

Show simple item record