Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica
Microbial community dynamics within the fast sea ice of Prydz Bay (68S78E) were investigated over an annual cycle at two sites (1 and 3km offshore) between April and November 2008. There are few long-term sea ice studies, and few that cover the phase of winter darkness when autotrophic processes are...
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ftunivtasecite:oai:ecite.utas.edu.au:77892 2023-05-15T14:02:30+02:00 Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica Paterson, H Laybourn-Parry, J 2012 https://doi.org/10.1007/s00300-011-1146-3 http://ecite.utas.edu.au/77892 en eng Springer-Verlag http://dx.doi.org/10.1007/s00300-011-1146-3 Paterson, H and Laybourn-Parry, J, Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica, Polar Biology, 35, (7) pp. 993-1002. ISSN 0722-4060 (2012) [Refereed Article] http://ecite.utas.edu.au/77892 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2012 ftunivtasecite https://doi.org/10.1007/s00300-011-1146-3 2019-12-13T21:43:47Z Microbial community dynamics within the fast sea ice of Prydz Bay (68S78E) were investigated over an annual cycle at two sites (1 and 3km offshore) between April and November 2008. There are few long-term sea ice studies, and few that cover the phase of winter darkness when autotrophic processes are curtailed. Mean chlorophyll a concentrations in the ice column ranged between 0.76 and 44.8μgL −1 at the 1-km site (Site 1) and 3.11144.6μgL −1 at the 3-km site (Site 2). Highest chlorophyll a usually occurred at the base of the ice. Bacterial concentrations ranged between 0.30 and 2.0810 8 cellsL −1 , heterotrophic nanoflagellates (HNAN) between 0.2110 5 and 2.9810 5 cellsL −1 and phototrophic nanoflagellates (PNAN) 01.0610 5 cellsL −1 . While HNAN occurred throughout the year, PNAN were largely absent in winter. Dinoflagellates were a conspicuous and occasionally an abundant element of the community (maximum 17,460cellsL −1 ), while ciliates were sparse. The bacterial community showed considerable morphological diversity with a dominance of filamentous forms. Bacterial production continued throughout the year ranging between 0 and 22.92μgCL −1 day −1 throughout the ice column. Lowest rates occurred between late June and early August. The sea ice sustained an active and diverse microbial community through its annual extent. The data suggest that during winter darkness the microbial community is dominated by heterotrophic processes, sustained by a pool of dissolved organic carbon. Article in Journal/Newspaper Antarc* Antarctica Polar Biology Prydz Bay Sea ice eCite UTAS (University of Tasmania) Prydz Bay Polar Biology 35 7 993 1002 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Paterson, H Laybourn-Parry, J Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
Microbial community dynamics within the fast sea ice of Prydz Bay (68S78E) were investigated over an annual cycle at two sites (1 and 3km offshore) between April and November 2008. There are few long-term sea ice studies, and few that cover the phase of winter darkness when autotrophic processes are curtailed. Mean chlorophyll a concentrations in the ice column ranged between 0.76 and 44.8μgL −1 at the 1-km site (Site 1) and 3.11144.6μgL −1 at the 3-km site (Site 2). Highest chlorophyll a usually occurred at the base of the ice. Bacterial concentrations ranged between 0.30 and 2.0810 8 cellsL −1 , heterotrophic nanoflagellates (HNAN) between 0.2110 5 and 2.9810 5 cellsL −1 and phototrophic nanoflagellates (PNAN) 01.0610 5 cellsL −1 . While HNAN occurred throughout the year, PNAN were largely absent in winter. Dinoflagellates were a conspicuous and occasionally an abundant element of the community (maximum 17,460cellsL −1 ), while ciliates were sparse. The bacterial community showed considerable morphological diversity with a dominance of filamentous forms. Bacterial production continued throughout the year ranging between 0 and 22.92μgCL −1 day −1 throughout the ice column. Lowest rates occurred between late June and early August. The sea ice sustained an active and diverse microbial community through its annual extent. The data suggest that during winter darkness the microbial community is dominated by heterotrophic processes, sustained by a pool of dissolved organic carbon. |
format |
Article in Journal/Newspaper |
author |
Paterson, H Laybourn-Parry, J |
author_facet |
Paterson, H Laybourn-Parry, J |
author_sort |
Paterson, H |
title |
Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica |
title_short |
Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica |
title_full |
Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica |
title_fullStr |
Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica |
title_full_unstemmed |
Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica |
title_sort |
sea ice microbial dynamics over an annual ice cycle in prydz bay, antarctica |
publisher |
Springer-Verlag |
publishDate |
2012 |
url |
https://doi.org/10.1007/s00300-011-1146-3 http://ecite.utas.edu.au/77892 |
geographic |
Prydz Bay |
geographic_facet |
Prydz Bay |
genre |
Antarc* Antarctica Polar Biology Prydz Bay Sea ice |
genre_facet |
Antarc* Antarctica Polar Biology Prydz Bay Sea ice |
op_relation |
http://dx.doi.org/10.1007/s00300-011-1146-3 Paterson, H and Laybourn-Parry, J, Sea ice microbial dynamics over an annual ice cycle in Prydz Bay, Antarctica, Polar Biology, 35, (7) pp. 993-1002. ISSN 0722-4060 (2012) [Refereed Article] http://ecite.utas.edu.au/77892 |
op_doi |
https://doi.org/10.1007/s00300-011-1146-3 |
container_title |
Polar Biology |
container_volume |
35 |
container_issue |
7 |
container_start_page |
993 |
op_container_end_page |
1002 |
_version_ |
1766272794381778944 |