Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica
1. Beaver Lake, a large epishelf lake in eastern Antarctica was sampled on two occasions during the austral summer of 2000. Two sites, one 1 km offshore and another 6 km offshore were sampled at intervals to depths of 40 and 110 m, respectively. 2. The lake is an end member of ultra-oligotrophic lak...
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2001
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Online Access: | http://nora.nerc.ac.uk/id/eprint/19814/ http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2427.2001.00741.x/pdf |
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ftnerc:oai:nora.nerc.ac.uk:19814 2023-05-15T13:45:12+02:00 Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica Laybourn-Parry, Johanna Quayle, Wendy C. Henshaw, Tracey Ruddell, Andrew Marchant, Harvey J. 2001 http://nora.nerc.ac.uk/id/eprint/19814/ http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2427.2001.00741.x/pdf unknown Blackwell Laybourn-Parry, Johanna; Quayle, Wendy C.; Henshaw, Tracey; Ruddell, Andrew; Marchant, Harvey J. 2001 Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica. Freshwater Biology, 46 (9). 1205-1217. https://doi.org/10.1046/j.1365-2427.2001.00741.x <https://doi.org/10.1046/j.1365-2427.2001.00741.x> Hydrology Publication - Article PeerReviewed 2001 ftnerc https://doi.org/10.1046/j.1365-2427.2001.00741.x 2023-02-04T19:32:30Z 1. Beaver Lake, a large epishelf lake in eastern Antarctica was sampled on two occasions during the austral summer of 2000. Two sites, one 1 km offshore and another 6 km offshore were sampled at intervals to depths of 40 and 110 m, respectively. 2. The lake is an end member of ultra-oligotrophic lake systems with a very low carbon pool. Dissolved organic carbon concentrations ranged between 95 and 652 lg L±1. Nutrient levels were generally low with soluble reactive phosphorus ranging from undetectable to 8.4 lg L±1, ammonium ranged between 1.8 and 5.0 lg L±1, nitrate from undetectable to 161 lg L±1 and nitrite 1.1±5.3 lg L±1. 3. Chlorophyll a concentrations (0.39±4.38 lg L±1) showed an unusual distribution with the highest levels close to the lake bottom at the offshore site (110 m) where the phototrophic nano¯agellates (PNAN) displayed strong auto¯uorescence. 4. Bacterial concentrations were low, with a maximum of 7.60 ´ 107 L±1, as were the concentrations of heterotrophic nano¯agellates that exploit them. 5. Primary production ranged between 19.7 and 25.49 lg C L±1 day±1 and bacterial production from 0.32 to 1.15 lg C L±1 day±1. 6. In common with other continental Antarctic lakes, the system was dominated by a microbial plankton. However, a dwarf variety of the calanoid copepod, Boeckella poppei, occurred below 25 m at concentrations of 3±5 L±1. 7. The data suggest that primary production and bacterial production were not limited by nutrient availability, but by other factors, e.g. in the case of bacterial production by organic carbon concentrations and primary production by low temperatures. Article in Journal/Newspaper Antarc* Antarctic Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic Austral Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Beaver Lake ENVELOPE(68.295,68.295,-70.793,-70.793) Freshwater Biology 46 9 1205 1217 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Hydrology |
spellingShingle |
Hydrology Laybourn-Parry, Johanna Quayle, Wendy C. Henshaw, Tracey Ruddell, Andrew Marchant, Harvey J. Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica |
topic_facet |
Hydrology |
description |
1. Beaver Lake, a large epishelf lake in eastern Antarctica was sampled on two occasions during the austral summer of 2000. Two sites, one 1 km offshore and another 6 km offshore were sampled at intervals to depths of 40 and 110 m, respectively. 2. The lake is an end member of ultra-oligotrophic lake systems with a very low carbon pool. Dissolved organic carbon concentrations ranged between 95 and 652 lg L±1. Nutrient levels were generally low with soluble reactive phosphorus ranging from undetectable to 8.4 lg L±1, ammonium ranged between 1.8 and 5.0 lg L±1, nitrate from undetectable to 161 lg L±1 and nitrite 1.1±5.3 lg L±1. 3. Chlorophyll a concentrations (0.39±4.38 lg L±1) showed an unusual distribution with the highest levels close to the lake bottom at the offshore site (110 m) where the phototrophic nano¯agellates (PNAN) displayed strong auto¯uorescence. 4. Bacterial concentrations were low, with a maximum of 7.60 ´ 107 L±1, as were the concentrations of heterotrophic nano¯agellates that exploit them. 5. Primary production ranged between 19.7 and 25.49 lg C L±1 day±1 and bacterial production from 0.32 to 1.15 lg C L±1 day±1. 6. In common with other continental Antarctic lakes, the system was dominated by a microbial plankton. However, a dwarf variety of the calanoid copepod, Boeckella poppei, occurred below 25 m at concentrations of 3±5 L±1. 7. The data suggest that primary production and bacterial production were not limited by nutrient availability, but by other factors, e.g. in the case of bacterial production by organic carbon concentrations and primary production by low temperatures. |
format |
Article in Journal/Newspaper |
author |
Laybourn-Parry, Johanna Quayle, Wendy C. Henshaw, Tracey Ruddell, Andrew Marchant, Harvey J. |
author_facet |
Laybourn-Parry, Johanna Quayle, Wendy C. Henshaw, Tracey Ruddell, Andrew Marchant, Harvey J. |
author_sort |
Laybourn-Parry, Johanna |
title |
Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica |
title_short |
Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica |
title_full |
Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica |
title_fullStr |
Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica |
title_full_unstemmed |
Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica |
title_sort |
life on the edge: the plankton and chemistry of beaver lake, an ultra-oligotrophic epishelf lake, antarctica |
publisher |
Blackwell |
publishDate |
2001 |
url |
http://nora.nerc.ac.uk/id/eprint/19814/ http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2427.2001.00741.x/pdf |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(68.295,68.295,-70.793,-70.793) |
geographic |
Antarctic Austral Boeckella Beaver Lake |
geographic_facet |
Antarctic Austral Boeckella Beaver Lake |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Laybourn-Parry, Johanna; Quayle, Wendy C.; Henshaw, Tracey; Ruddell, Andrew; Marchant, Harvey J. 2001 Life on the edge: the plankton and chemistry of Beaver Lake, an ultra-oligotrophic epishelf lake, Antarctica. Freshwater Biology, 46 (9). 1205-1217. https://doi.org/10.1046/j.1365-2427.2001.00741.x <https://doi.org/10.1046/j.1365-2427.2001.00741.x> |
op_doi |
https://doi.org/10.1046/j.1365-2427.2001.00741.x |
container_title |
Freshwater Biology |
container_volume |
46 |
container_issue |
9 |
container_start_page |
1205 |
op_container_end_page |
1217 |
_version_ |
1766216897411416064 |