Phytoplankton ecology in an Antarctic lake
SUMMARY. The ecology of the phytoplankton of Heywood Lake, Signy Island, South Orkney Islands, Antarctica was investigated during 1969–72. The lake, which is ice‐covered for 8–10 months per year, is moderately eutrophic due to enrichment by seal excreta. The annual cycle of the phytoplankton is desc...
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ftnerc:oai:nora.nerc.ac.uk:524723 2023-05-15T13:41:44+02:00 Phytoplankton ecology in an Antarctic lake Light, J.J. Ellis-Evans, J. Cynan Priddle, J. 1981 http://nora.nerc.ac.uk/id/eprint/524723/ https://doi.org/10.1111/j.1365-2427.1981.tb01239.x unknown Light, J.J.; Ellis-Evans, J. Cynan; Priddle, J. 1981 Phytoplankton ecology in an Antarctic lake. Freshwater Biology, 11 (1). 11-26. https://doi.org/10.1111/j.1365-2427.1981.tb01239.x <https://doi.org/10.1111/j.1365-2427.1981.tb01239.x> Botany Publication - Article PeerReviewed 1981 ftnerc https://doi.org/10.1111/j.1365-2427.1981.tb01239.x 2023-02-04T19:49:01Z SUMMARY. The ecology of the phytoplankton of Heywood Lake, Signy Island, South Orkney Islands, Antarctica was investigated during 1969–72. The lake, which is ice‐covered for 8–10 months per year, is moderately eutrophic due to enrichment by seal excreta. The annual cycle of the phytoplankton is described. During the winter (approximately May‐September), very few algal cells could be detected in the water column and 14C fixation was below measurable limits. In spring (October‐November), a rapidly‐growing population of algae caused a large increase in the chlorophyll‐a concentration (maximum value 170 mg m−2) but carbon fixation remained low, with values <500 mg C m−2 day−1. The algae contributing to this peak were mainly small chlorophytes and chrysophytes. The summer open‐water period (December‐March) was characterized by a different phytoplankton population dominated by cryptophytes. Chlorophyll levels were lower (c. 40 mg m−2) but 14C fixation rates >3 g C m−2 day−1 were measured on bright days. Values for Assimilation Number were very high (maximum value 10.5 mg C h−1 mg−1 (chlorophyll‐a) in January (1971) though temperatures never exceeded 8°C. In autumn, the phytoplankton regressed to winter levels. Both spring and summer algal populations probably overwinter as resting stages. Article in Journal/Newspaper Antarc* Antarctic Antarctica Signy Island South Orkney Islands Natural Environment Research Council: NERC Open Research Archive Antarctic South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Heywood ENVELOPE(-59.683,-59.683,-62.317,-62.317) Heywood Lake ENVELOPE(-45.609,-45.609,-60.691,-60.691) Freshwater Biology 11 1 11 26 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Botany |
spellingShingle |
Botany Light, J.J. Ellis-Evans, J. Cynan Priddle, J. Phytoplankton ecology in an Antarctic lake |
topic_facet |
Botany |
description |
SUMMARY. The ecology of the phytoplankton of Heywood Lake, Signy Island, South Orkney Islands, Antarctica was investigated during 1969–72. The lake, which is ice‐covered for 8–10 months per year, is moderately eutrophic due to enrichment by seal excreta. The annual cycle of the phytoplankton is described. During the winter (approximately May‐September), very few algal cells could be detected in the water column and 14C fixation was below measurable limits. In spring (October‐November), a rapidly‐growing population of algae caused a large increase in the chlorophyll‐a concentration (maximum value 170 mg m−2) but carbon fixation remained low, with values <500 mg C m−2 day−1. The algae contributing to this peak were mainly small chlorophytes and chrysophytes. The summer open‐water period (December‐March) was characterized by a different phytoplankton population dominated by cryptophytes. Chlorophyll levels were lower (c. 40 mg m−2) but 14C fixation rates >3 g C m−2 day−1 were measured on bright days. Values for Assimilation Number were very high (maximum value 10.5 mg C h−1 mg−1 (chlorophyll‐a) in January (1971) though temperatures never exceeded 8°C. In autumn, the phytoplankton regressed to winter levels. Both spring and summer algal populations probably overwinter as resting stages. |
format |
Article in Journal/Newspaper |
author |
Light, J.J. Ellis-Evans, J. Cynan Priddle, J. |
author_facet |
Light, J.J. Ellis-Evans, J. Cynan Priddle, J. |
author_sort |
Light, J.J. |
title |
Phytoplankton ecology in an Antarctic lake |
title_short |
Phytoplankton ecology in an Antarctic lake |
title_full |
Phytoplankton ecology in an Antarctic lake |
title_fullStr |
Phytoplankton ecology in an Antarctic lake |
title_full_unstemmed |
Phytoplankton ecology in an Antarctic lake |
title_sort |
phytoplankton ecology in an antarctic lake |
publishDate |
1981 |
url |
http://nora.nerc.ac.uk/id/eprint/524723/ https://doi.org/10.1111/j.1365-2427.1981.tb01239.x |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-59.683,-59.683,-62.317,-62.317) ENVELOPE(-45.609,-45.609,-60.691,-60.691) |
geographic |
Antarctic South Orkney Islands Signy Island Heywood Heywood Lake |
geographic_facet |
Antarctic South Orkney Islands Signy Island Heywood Heywood Lake |
genre |
Antarc* Antarctic Antarctica Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctic Antarctica Signy Island South Orkney Islands |
op_relation |
Light, J.J.; Ellis-Evans, J. Cynan; Priddle, J. 1981 Phytoplankton ecology in an Antarctic lake. Freshwater Biology, 11 (1). 11-26. https://doi.org/10.1111/j.1365-2427.1981.tb01239.x <https://doi.org/10.1111/j.1365-2427.1981.tb01239.x> |
op_doi |
https://doi.org/10.1111/j.1365-2427.1981.tb01239.x |
container_title |
Freshwater Biology |
container_volume |
11 |
container_issue |
1 |
container_start_page |
11 |
op_container_end_page |
26 |
_version_ |
1766155635759513600 |