Plankton metabolism and bacterial growth efficiency in offshore waters along a latitudinal transect between the UK and Svalbard |
| |
| Institution: | 1. Dept. Ecología y biología animal, Facultad de Ciencias del Mar, Universidad de Vigo, CP 36210 Vigo (Pontevedra), Spain;2. Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA Scotland, UK;1. Biology Department & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal;2. Chemistry Department & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal;3. BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Str. 11, D-12489 Berlin, Germany;1. School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA;2. Boone Pickens School of Geology, Oklahoma State University, Stillwater, OK 74078-3031, USA;3. Center for Geomicrobiology, Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark;1. Instituto Andaluz de Ciencias de la Tierra, IACT (CSIC–UGR), Avenida de Las Palmeras 4, 18100 Armilla, Granada, Spain;2. King Abdullah University of Science and Technology (KAUST), Division of Biological and Environmental Sciences and Engineering (BESE), Red Sea Research Center (RSRC), Thuwal 23955-6900, Saudi Arabia;3. Centre de Formation et de Recherche sur les Environnements Méditerranéens (CEFREM), UMR5110, Université de Perpignan Via Domitia, 66860 Perpignan, France;4. Laboratoire des sciences de l’Environnement MARin (LEMAR), UMR 6539, Université de Bretagne Occidentale, Rue Dumont D’Urville, 29280 Plouzané, France;5. School of Biological Sciences, Oceanlab, University of Aberdeen, Aberdeen, Scotland AB41 6AA, UK;6. Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, Sopot 81-712, Poland;7. Ocean and Ecosystem Sciences Division, Fisheries and Oceans Canada, Bedford Institute of Oceanography, 1 Challenger Drive, Dartmouth, NS B2Y 4A2, Canada;8. Takuvik, Joint International Laboratory, Université Laval and CNRS, Département de Biologie, Pavillon Alexandre-Vachon, 1045, avenue de la Médecine, Québec City, QC G1V 0A6, Canada;1. Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal;2. Departamento de Química & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal;3. CIIMAR, Universidade do Porto, 4050-123 Porto, Portugal |
| |
| Abstract: | Euphotic zone gross primary production, community respiration and net community production were determined from in vitro changes of dissolved oxygen, and from in vivo INT reduction capacity fractionated into two size classes, in offshore waters along a latitudinal transect crossing the North, Norwegian and Greenland Seas between the UK and Svalbard. Rates of gross primary production were higher and more variable than community respiration, so net autotrophy prevailed in the euphotic zone with an average net community production of 164±64 mmol O2 m?2 d?1. Respiration seemed to be mainly attributed to large eukaryotic cells (>0.8 µm) with smaller cells, mainly bacteria, accounting for a mean of 25% (range 5–48%) of community respiration. Estimates of bacterial growth efficiency were very variable (range 7–69%) due to uncoupling between bacterial respiration and production. Larger cells tended to contribute more towards total respiration in communities with high gross primary production and low community respiration, while bacteria contributed more towards total respiration in communities with lower gross primary production, typical of microbial-dominated systems. This suggests that community respiration is related to the size structure of the plankton community. |
| |
| Keywords: | Gross primary production Community respiration Bacterial respiration Bacterial growth efficiency Atlantic Sub-Arctic region |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
