dc.contributor.author | Seuthe, Lena | eng |
dc.contributor.author | Töpper, Birte | eng |
dc.contributor.author | Reigstad, Marit | eng |
dc.contributor.author | Thyrhaug, Runar | eng |
dc.contributor.author | Vaquer-Sunyer, Raquel | eng |
dc.date.accessioned | 2012-08-09T07:48:00Z | |
dc.date.issued | 2011-09-20 | eng |
dc.Published | Aquatic Microbial Ecology 64(3): 253-266 | |
dc.identifier.issn | 0948-3055 | en_US |
dc.identifier.uri | http://hdl.handle.net/1956/5931 | |
dc.description.abstract | Marine microbial communities have been little studied in Arctic waters, especially during the winter–spring transition before the development of extensive phytoplankton blooms. This study investigated microbial plankton in the ice-covered polar surface waters of the northwestern Fram Strait (75 to 80°N) at the onset of the 24 h light period in spring (April to May). The system we encountered was characterised by low concentrations of chlorophyll a (<0.2 μg l−1) and a low abundance of both bacteria (1.4 to 2.5 × 108 cells l−1) and protists (1 to 1.7 × 105 cells l−1). Bacterial production was very low (≤0.63 μg C l−1 d−1), despite the dominance of nucleic-acid-rich bacteria (58 ± 6% of total bacterial abundance). Small (2 to 5 μm) phototrophs dominated the eukaryotic assemblage in the surface and most probably had profound effects on the composition and metabolic balance of the microbial community as a whole. Most stations appeared to have been net-autotrophic, and calculations of phagotrophy indicated a balanced carbon budget for the microbial community. Mixotrophy was seen in a large part of the ciliate assemblage and may have contributed to the productivity and stability of the pre-bloom system that we encountered. | en_US |
dc.language.iso | eng | eng |
dc.publisher | Inter-Research | en_US |
dc.relation.ispartof | <a href="http://hdl.handle.net/1956/5929" target="blank">Bacterial community structures in the Arctic Ocean: the effect of increased carbon load on nutrient competition and bacterial diversity</a> | en_US |
dc.subject | Flow cytometry | eng |
dc.subject | Bacteria | eng |
dc.subject | Microzooplankton | eng |
dc.subject | Mixotrophy | eng |
dc.subject | Planktonic metabolism | eng |
dc.title | Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright Inter-Research. All rights reserved. | en_US |
dc.identifier.doi | https://doi.org/10.3354/ame01525 | |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 | en_US |
dc.date.embargoenddate | 2014-09-20 | |