Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica
1. The temporal abundance and composition of the plankton of a continental Antarctic lake (Lake Druzhby) situated in the Vestfold Hills, Eastern Antarctica was investigated from December 1992 to December 1993. The system was dominated by microbial plankton (cyanobacteria, heterotrophic bacteria and...
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Language: | English |
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Online Access: | http://dx.doi.org/10.1046/j.1365-2427.1996.00480.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.1996.00480.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.1996.00480.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1365-2427.1996.00480.x |
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crwiley:10.1046/j.1365-2427.1996.00480.x 2024-06-02T07:56:39+00:00 Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica LAYBOURN‐PARRY, JOHANNA BAYLISS, PETER 1996 http://dx.doi.org/10.1046/j.1365-2427.1996.00480.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.1996.00480.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.1996.00480.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1365-2427.1996.00480.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 35, issue 1, page 57-67 ISSN 0046-5070 1365-2427 journal-article 1996 crwiley https://doi.org/10.1046/j.1365-2427.1996.00480.x 2024-05-03T11:23:11Z 1. The temporal abundance and composition of the plankton of a continental Antarctic lake (Lake Druzhby) situated in the Vestfold Hills, Eastern Antarctica was investigated from December 1992 to December 1993. The system was dominated by microbial plankton (cyanobacteria, heterotrophic bacteria and protozoans) with few metazoans. 2. Chlorophyll a concentrations ranged between 0.15 and 1.1 μg l –1 and showed highest levels from late winter to spring. 3. Heterotrophic bacteria ranged between 75 and 250 × 10 6 l –1 with highest abundances in late winter/spring. Mean bacterial biovolumes showed considerable seasonal variation (0.05–0.31 μm 3 ). Largest biovolumes occurred in summer and this was the time of highest community biomass. 4. Heterotrophic nanoflagellates reached highest abundances in late summer (maximum 14 × 10 5 l –1 ). Their mean biovolume also exhibited considerable seasonal variation, ranging between 1.77 and 27.0 μm 3 , with largest size resulting in community biomass peaking in early summer. Ciliated protozoa were poorly represented and sparse. Phototrophic nanoflagellates were sparse in this lake; instead the phototrophic plankton was dominated by a small rod‐shaped cyanobacterium which constituted the largest carbon pool in the system. It was common throughout the year, its biomass peaking in autumn. Its presence is discussed in relation to lake morphometry and light climate. 5. Heterotrophic flagellate grazing rates ranged from 6.78 bacteria cell –1 day –1 at 2 °C to 11.8 bacteria cell –1 day –1 at 4 °C. They remove around 2% of the bacterial carbon pool per day during summer and winter. 6. Nutrient levels were low and recorded in pulses. Dissolved and particulate organic carbon were also low, usually less than 3 mg l –1 and 600 μg l –1 , respectively. The carbon pools were derived from autochthonous sources. This lake system is driven by bottom‐up forces and lacks top‐down control, which fits into the picture currently seen for continental Antarctic lakes. Article in Journal/Newspaper Antarc* Antarctic Antarctica Princess Elizabeth Land Wiley Online Library Antarctic Vestfold Hills Vestfold Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) Lake Druzhby ENVELOPE(78.314,78.314,-68.593,-68.593) Freshwater Biology 35 1 57 67 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
1. The temporal abundance and composition of the plankton of a continental Antarctic lake (Lake Druzhby) situated in the Vestfold Hills, Eastern Antarctica was investigated from December 1992 to December 1993. The system was dominated by microbial plankton (cyanobacteria, heterotrophic bacteria and protozoans) with few metazoans. 2. Chlorophyll a concentrations ranged between 0.15 and 1.1 μg l –1 and showed highest levels from late winter to spring. 3. Heterotrophic bacteria ranged between 75 and 250 × 10 6 l –1 with highest abundances in late winter/spring. Mean bacterial biovolumes showed considerable seasonal variation (0.05–0.31 μm 3 ). Largest biovolumes occurred in summer and this was the time of highest community biomass. 4. Heterotrophic nanoflagellates reached highest abundances in late summer (maximum 14 × 10 5 l –1 ). Their mean biovolume also exhibited considerable seasonal variation, ranging between 1.77 and 27.0 μm 3 , with largest size resulting in community biomass peaking in early summer. Ciliated protozoa were poorly represented and sparse. Phototrophic nanoflagellates were sparse in this lake; instead the phototrophic plankton was dominated by a small rod‐shaped cyanobacterium which constituted the largest carbon pool in the system. It was common throughout the year, its biomass peaking in autumn. Its presence is discussed in relation to lake morphometry and light climate. 5. Heterotrophic flagellate grazing rates ranged from 6.78 bacteria cell –1 day –1 at 2 °C to 11.8 bacteria cell –1 day –1 at 4 °C. They remove around 2% of the bacterial carbon pool per day during summer and winter. 6. Nutrient levels were low and recorded in pulses. Dissolved and particulate organic carbon were also low, usually less than 3 mg l –1 and 600 μg l –1 , respectively. The carbon pools were derived from autochthonous sources. This lake system is driven by bottom‐up forces and lacks top‐down control, which fits into the picture currently seen for continental Antarctic lakes. |
format |
Article in Journal/Newspaper |
author |
LAYBOURN‐PARRY, JOHANNA BAYLISS, PETER |
spellingShingle |
LAYBOURN‐PARRY, JOHANNA BAYLISS, PETER Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
author_facet |
LAYBOURN‐PARRY, JOHANNA BAYLISS, PETER |
author_sort |
LAYBOURN‐PARRY, JOHANNA |
title |
Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
title_short |
Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
title_full |
Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
title_fullStr |
Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
title_full_unstemmed |
Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
title_sort |
seasonal dynamics of the planktonic community in lake druzhby, princess elizabeth land, eastern antarctica |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1046/j.1365-2427.1996.00480.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.1996.00480.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.1996.00480.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1365-2427.1996.00480.x |
long_lat |
ENVELOPE(80.367,80.367,-68.500,-68.500) ENVELOPE(78.314,78.314,-68.593,-68.593) |
geographic |
Antarctic Vestfold Hills Vestfold Princess Elizabeth Land Lake Druzhby |
geographic_facet |
Antarctic Vestfold Hills Vestfold Princess Elizabeth Land Lake Druzhby |
genre |
Antarc* Antarctic Antarctica Princess Elizabeth Land |
genre_facet |
Antarc* Antarctic Antarctica Princess Elizabeth Land |
op_source |
Freshwater Biology volume 35, issue 1, page 57-67 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2427.1996.00480.x |
container_title |
Freshwater Biology |
container_volume |
35 |
container_issue |
1 |
container_start_page |
57 |
op_container_end_page |
67 |
_version_ |
1800757551570092032 |