Abstract Antarctica is the continent with the harshest climate on the Earth. Antarctic lakes, however, usually presents liquid water, at least during part of the year or below the ice cover, especially those from the sub-Antarctic islands and the maritime Antarctic region where climatic conditions a...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.455.1478 2023-05-15T13:43:36+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.1478 http://www.environmental-expert.com/Files%5C6063%5Carticles%5C8640%5C4-12-2.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.1478 http://www.environmental-expert.com/Files%5C6063%5Carticles%5C8640%5C4-12-2.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.environmental-expert.com/Files%5C6063%5Carticles%5C8640%5C4-12-2.pdf text ftciteseerx 2016-01-08T06:08:21Z Abstract Antarctica is the continent with the harshest climate on the Earth. Antarctic lakes, however, usually presents liquid water, at least during part of the year or below the ice cover, especially those from the sub-Antarctic islands and the maritime Antarctic region where climatic conditions are less extreme. Planktonic commu-nities in these lakes are mostly dominated by microorganisms, including bacteria and photo-trophic and heterotrophic protists, and by meta-zooplankton, usually represented by rotifers and calanoid copepods, the latter mainly from the genus Boeckella. Here I report and discuss on studies performed during the last decade that show that there is a potential for top–down con-trol of the structure of the planktonic microbial food web in sub-Antarctic and maritime Antarc-tic lakes. In some of the studied lakes, the effect of copepod grazing on protozoa, either ciliates or flagellates, depending on size of both the predator and the prey, could promote cascade effects that would be transmitted to the bacterioplankton assemblage. Text Antarc* Antarctic Antarctica Copepods Unknown Antarctic Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) |
institution |
Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Abstract Antarctica is the continent with the harshest climate on the Earth. Antarctic lakes, however, usually presents liquid water, at least during part of the year or below the ice cover, especially those from the sub-Antarctic islands and the maritime Antarctic region where climatic conditions are less extreme. Planktonic commu-nities in these lakes are mostly dominated by microorganisms, including bacteria and photo-trophic and heterotrophic protists, and by meta-zooplankton, usually represented by rotifers and calanoid copepods, the latter mainly from the genus Boeckella. Here I report and discuss on studies performed during the last decade that show that there is a potential for top–down con-trol of the structure of the planktonic microbial food web in sub-Antarctic and maritime Antarc-tic lakes. In some of the studied lakes, the effect of copepod grazing on protozoa, either ciliates or flagellates, depending on size of both the predator and the prey, could promote cascade effects that would be transmitted to the bacterioplankton assemblage. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.1478 http://www.environmental-expert.com/Files%5C6063%5Carticles%5C8640%5C4-12-2.pdf |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) |
geographic |
Antarctic Boeckella |
geographic_facet |
Antarctic Boeckella |
genre |
Antarc* Antarctic Antarctica Copepods |
genre_facet |
Antarc* Antarctic Antarctica Copepods |
op_source |
http://www.environmental-expert.com/Files%5C6063%5Carticles%5C8640%5C4-12-2.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.1478 http://www.environmental-expert.com/Files%5C6063%5Carticles%5C8640%5C4-12-2.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766190997173174272 |