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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Blackwell Publishing Ltd
1996
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ftunivtasecite:oai:ecite.utas.edu.au:49079 2023-05-15T13:40:51+02:00 Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica Laybourn-Parry, J Bayliss, P 1996 https://doi.org/10.1046/j.1365-2427.1996.00480.x http://ecite.utas.edu.au/49079 en eng Blackwell Publishing Ltd http://dx.doi.org/10.1046/j.1365-2427.1996.00480.x Laybourn-Parry, J and Bayliss, P, Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica, Freshwater Biology, 35, (1) pp. 57-67. ISSN 0046-5070 (1996) [Refereed Article] http://ecite.utas.edu.au/49079 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 1996 ftunivtasecite https://doi.org/10.1046/j.1365-2427.1996.00480.x 2019-12-13T21:23:45Z 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 g 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 m 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 m 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 2C to 11.8 bacteria cell -1 day -1 at 4C. 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 g 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 eCite UTAS (University of Tasmania) Antarctic Lake Druzhby ENVELOPE(78.314,78.314,-68.593,-68.593) Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) Vestfold Vestfold Hills Freshwater Biology 35 1 57 67 |
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) Laybourn-Parry, J Bayliss, P Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
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 g 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 m 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 m 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 2C to 11.8 bacteria cell -1 day -1 at 4C. 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 g 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, J Bayliss, P |
author_facet |
Laybourn-Parry, J Bayliss, P |
author_sort |
Laybourn-Parry, J |
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 |
Blackwell Publishing Ltd |
publishDate |
1996 |
url |
https://doi.org/10.1046/j.1365-2427.1996.00480.x http://ecite.utas.edu.au/49079 |
long_lat |
ENVELOPE(78.314,78.314,-68.593,-68.593) ENVELOPE(80.367,80.367,-68.500,-68.500) |
geographic |
Antarctic Lake Druzhby Princess Elizabeth Land Vestfold Vestfold Hills |
geographic_facet |
Antarctic Lake Druzhby Princess Elizabeth Land Vestfold Vestfold Hills |
genre |
Antarc* Antarctic Antarctica Princess Elizabeth Land |
genre_facet |
Antarc* Antarctic Antarctica Princess Elizabeth Land |
op_relation |
http://dx.doi.org/10.1046/j.1365-2427.1996.00480.x Laybourn-Parry, J and Bayliss, P, Seasonal dynamics of the planktonic community in Lake Druzhby, Princess Elizabeth Land, Eastern Antarctica, Freshwater Biology, 35, (1) pp. 57-67. ISSN 0046-5070 (1996) [Refereed Article] http://ecite.utas.edu.au/49079 |
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_ |
1766141365800927232 |