Bacterioplankton production in freshwater Antarctic lakes
1. Bacterioplankton production was measured in the water columns of two ultra-oligotrophic, freshwater Antarctic lakes (Crooked Lake and Lake Druzhby) during an annual cycle. In both lakes bacterial production, measured by the incorporation of [H-3] thymidine, continued in winter and showed a cycle...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/12237/ http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2427.2004.01221.x/full |
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ftnerc:oai:nora.nerc.ac.uk:12237 2023-05-15T13:45:10+02:00 Bacterioplankton production in freshwater Antarctic lakes Laybourn-Parry, Johanna Henshaw, Tracey Jones, Davey J. Quayle, Wendy 2004 http://nora.nerc.ac.uk/id/eprint/12237/ http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2427.2004.01221.x/full unknown Blackwell Laybourn-Parry, Johanna; Henshaw, Tracey; Jones, Davey J.; Quayle, Wendy. 2004 Bacterioplankton production in freshwater Antarctic lakes. Freshwater Biology, 49 (6). 735-744. https://doi.org/10.1111/j.1365-2427.2004.01221.x <https://doi.org/10.1111/j.1365-2427.2004.01221.x> Biology and Microbiology Ecology and Environment Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1111/j.1365-2427.2004.01221.x 2023-02-04T19:27:51Z 1. Bacterioplankton production was measured in the water columns of two ultra-oligotrophic, freshwater Antarctic lakes (Crooked Lake and Lake Druzhby) during an annual cycle. In both lakes bacterial production, measured by the incorporation of [H-3] thymidine, continued in winter and showed a cycle over the year. The range of production was between 0 and 479 ng C L-1 h(-1) in Crooked Lake and 0-354 ng L-1 h(-1) in Lake Druzhby. 2. Abundance and mean cell volume both varied, producing marked changes in biomass during the year, with highest biomass occurring in the winter and early spring. Biomass showed similar seasonal trends in both lakes. 3. For most of the year inorganic forms of nitrogen and phosphorus were detectable in the water columns of the lakes and were unlikely to have limited bacterial production. Dissolved organic carbon (DOC) was below 3000 mug L-1. Dissolved amino acids and carbohydrates contributed 5-25% of the DOC pool in Crooked Lake and 5-64% in Lake Druzhby. Dissolved carbohydrates were consistently low, suggesting that this may have been the preferred carbon substrate for bacterioplankton. 4. Aggregate associated bacteria had higher mean cell volume, abundances and production than freely suspended bacteria in Lake Druzhby, while in Crooked Lake aggregate associated bacteria consistently had higher mean cell volumes than free bacteria, but abundance and production were on occasion higher in free bacteria compared with aggregate associated communities. 5. The data indicated that production is limited by continuous low temperatures and the limited availability of suitable DOC substrate. However, the bacterioplankton functions year round, responding to factors other than temperature. Article in Journal/Newspaper Antarc* Antarctic Natural Environment Research Council: NERC Open Research Archive Antarctic Crooked Lake ENVELOPE(78.382,78.382,-68.617,-68.617) Lake Druzhby ENVELOPE(78.314,78.314,-68.593,-68.593) Freshwater Biology 49 6 735 744 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Biology and Microbiology Ecology and Environment |
spellingShingle |
Biology and Microbiology Ecology and Environment Laybourn-Parry, Johanna Henshaw, Tracey Jones, Davey J. Quayle, Wendy Bacterioplankton production in freshwater Antarctic lakes |
topic_facet |
Biology and Microbiology Ecology and Environment |
description |
1. Bacterioplankton production was measured in the water columns of two ultra-oligotrophic, freshwater Antarctic lakes (Crooked Lake and Lake Druzhby) during an annual cycle. In both lakes bacterial production, measured by the incorporation of [H-3] thymidine, continued in winter and showed a cycle over the year. The range of production was between 0 and 479 ng C L-1 h(-1) in Crooked Lake and 0-354 ng L-1 h(-1) in Lake Druzhby. 2. Abundance and mean cell volume both varied, producing marked changes in biomass during the year, with highest biomass occurring in the winter and early spring. Biomass showed similar seasonal trends in both lakes. 3. For most of the year inorganic forms of nitrogen and phosphorus were detectable in the water columns of the lakes and were unlikely to have limited bacterial production. Dissolved organic carbon (DOC) was below 3000 mug L-1. Dissolved amino acids and carbohydrates contributed 5-25% of the DOC pool in Crooked Lake and 5-64% in Lake Druzhby. Dissolved carbohydrates were consistently low, suggesting that this may have been the preferred carbon substrate for bacterioplankton. 4. Aggregate associated bacteria had higher mean cell volume, abundances and production than freely suspended bacteria in Lake Druzhby, while in Crooked Lake aggregate associated bacteria consistently had higher mean cell volumes than free bacteria, but abundance and production were on occasion higher in free bacteria compared with aggregate associated communities. 5. The data indicated that production is limited by continuous low temperatures and the limited availability of suitable DOC substrate. However, the bacterioplankton functions year round, responding to factors other than temperature. |
format |
Article in Journal/Newspaper |
author |
Laybourn-Parry, Johanna Henshaw, Tracey Jones, Davey J. Quayle, Wendy |
author_facet |
Laybourn-Parry, Johanna Henshaw, Tracey Jones, Davey J. Quayle, Wendy |
author_sort |
Laybourn-Parry, Johanna |
title |
Bacterioplankton production in freshwater Antarctic lakes |
title_short |
Bacterioplankton production in freshwater Antarctic lakes |
title_full |
Bacterioplankton production in freshwater Antarctic lakes |
title_fullStr |
Bacterioplankton production in freshwater Antarctic lakes |
title_full_unstemmed |
Bacterioplankton production in freshwater Antarctic lakes |
title_sort |
bacterioplankton production in freshwater antarctic lakes |
publisher |
Blackwell |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/12237/ http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2427.2004.01221.x/full |
long_lat |
ENVELOPE(78.382,78.382,-68.617,-68.617) ENVELOPE(78.314,78.314,-68.593,-68.593) |
geographic |
Antarctic Crooked Lake Lake Druzhby |
geographic_facet |
Antarctic Crooked Lake Lake Druzhby |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Laybourn-Parry, Johanna; Henshaw, Tracey; Jones, Davey J.; Quayle, Wendy. 2004 Bacterioplankton production in freshwater Antarctic lakes. Freshwater Biology, 49 (6). 735-744. https://doi.org/10.1111/j.1365-2427.2004.01221.x <https://doi.org/10.1111/j.1365-2427.2004.01221.x> |
op_doi |
https://doi.org/10.1111/j.1365-2427.2004.01221.x |
container_title |
Freshwater Biology |
container_volume |
49 |
container_issue |
6 |
container_start_page |
735 |
op_container_end_page |
744 |
_version_ |
1766215000472420352 |