Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes
1. Viral and microbial loop dynamics were investigated over an annual cycle in threecontrasting saline Antarctic lakes Highway Lake (salinity 4&), Pendant Lake (salinity19&) and Ace Lake, a meromictic system (with a mixolimnion salinity of 18&) in order toassess the importance of viruses...
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Blackwell Publishing Ltd
2005
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Online Access: | http://interscience.wiley.com https://doi.org/10.1111/j.1365-2427.2005.01399.x http://ecite.utas.edu.au/49050 |
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ftunivtasecite:oai:ecite.utas.edu.au:49050 2023-05-15T13:40:51+02:00 Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes Madan, NJ Marshall, WA Laybourn-Parry, J 2005 application/pdf http://interscience.wiley.com https://doi.org/10.1111/j.1365-2427.2005.01399.x http://ecite.utas.edu.au/49050 en eng Blackwell Publishing Ltd http://ecite.utas.edu.au/49050/1/Virus -FWB PDF.pdf http://dx.doi.org/10.1111/j.1365-2427.2005.01399.x Madan, NJ and Marshall, WA and Laybourn-Parry, J, Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes, Freshwater Biology, 50, (8) pp. 1291-1300. ISSN 0046-5070 (2005) [Refereed Article] http://ecite.utas.edu.au/49050 Biological Sciences Microbiology Microbial Ecology Refereed Article PeerReviewed 2005 ftunivtasecite https://doi.org/10.1111/j.1365-2427.2005.01399.x 2019-12-13T21:23:45Z 1. Viral and microbial loop dynamics were investigated over an annual cycle in threecontrasting saline Antarctic lakes Highway Lake (salinity 4&), Pendant Lake (salinity19&) and Ace Lake, a meromictic system (with a mixolimnion salinity of 18&) in order toassess the importance of viruses in extreme, microbially dominated systems.2. Virus like particles (VLP) showed no clear seasonal pattern, with high concentrationsoccurring in both winter and summer (range 0.89 107 0.038 to12.017 107 1.28 mL)1). VLP abundances reflected lake productivity based on chlorophylla concentrations. Bacterial abundances and biomass did not correlate with VLPnumbers except in Pendant Lake, the most productive of the three lakes studied.3. Pendant Lake supported the highest bacterial biomass (range Highway: 18.44 1.35 to59.43 2.80 ng C mL)1; Ace: 14.42 2.69 to 68.39 2.95 ng C mL)1; Pendant: 31.36 3.94to 115.95 4.49 ng C mL)1) so that virus to bacteria ratios (VBR) (range 30.48 7.96 to96.67 8.21) were higher in Ace Lake (range 30.58 3.98 to 80.037 1.60) and HighwayLake (range 18.63 3.12 to 126.74 6.50).4. Negative correlations occurred between VLP and cryptophytes (dominant phototrophicnanoflagellates), suggesting that they were not hosts to lytic viruses. Among the otherprotists only the heterotrophic nanoflagellates of Highway Lake (dominated by the marinechoanoflagellate Diaphanoeca grandis) showed a positive correlation with VLP.5. The VLP was negatively correlated with photosynthetically active radiation (PAR) andtemperature, both of which increased with ice thinning and breakout, increasing viraldecay. In winter VLP probably persisted in cold, dark water.6. High VLP concentrations and high VBR (values at the upper end of those reported formarine and lacustrine systems) indicated that viruses, most of which were probablybacteriophage, are a major element within the microbial communities in extreme, salinelakes. Article in Journal/Newspaper Antarc* Antarctic eCite UTAS (University of Tasmania) Ace Lake ENVELOPE(78.188,78.188,-68.472,-68.472) Antarctic Highway Lake ENVELOPE(78.223,78.223,-68.463,-68.463) Pendant Lake ENVELOPE(78.240,78.240,-68.462,-68.462) Freshwater Biology 50 8 1291 1300 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Microbiology Microbial Ecology |
spellingShingle |
Biological Sciences Microbiology Microbial Ecology Madan, NJ Marshall, WA Laybourn-Parry, J Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes |
topic_facet |
Biological Sciences Microbiology Microbial Ecology |
description |
1. Viral and microbial loop dynamics were investigated over an annual cycle in threecontrasting saline Antarctic lakes Highway Lake (salinity 4&), Pendant Lake (salinity19&) and Ace Lake, a meromictic system (with a mixolimnion salinity of 18&) in order toassess the importance of viruses in extreme, microbially dominated systems.2. Virus like particles (VLP) showed no clear seasonal pattern, with high concentrationsoccurring in both winter and summer (range 0.89 107 0.038 to12.017 107 1.28 mL)1). VLP abundances reflected lake productivity based on chlorophylla concentrations. Bacterial abundances and biomass did not correlate with VLPnumbers except in Pendant Lake, the most productive of the three lakes studied.3. Pendant Lake supported the highest bacterial biomass (range Highway: 18.44 1.35 to59.43 2.80 ng C mL)1; Ace: 14.42 2.69 to 68.39 2.95 ng C mL)1; Pendant: 31.36 3.94to 115.95 4.49 ng C mL)1) so that virus to bacteria ratios (VBR) (range 30.48 7.96 to96.67 8.21) were higher in Ace Lake (range 30.58 3.98 to 80.037 1.60) and HighwayLake (range 18.63 3.12 to 126.74 6.50).4. Negative correlations occurred between VLP and cryptophytes (dominant phototrophicnanoflagellates), suggesting that they were not hosts to lytic viruses. Among the otherprotists only the heterotrophic nanoflagellates of Highway Lake (dominated by the marinechoanoflagellate Diaphanoeca grandis) showed a positive correlation with VLP.5. The VLP was negatively correlated with photosynthetically active radiation (PAR) andtemperature, both of which increased with ice thinning and breakout, increasing viraldecay. In winter VLP probably persisted in cold, dark water.6. High VLP concentrations and high VBR (values at the upper end of those reported formarine and lacustrine systems) indicated that viruses, most of which were probablybacteriophage, are a major element within the microbial communities in extreme, salinelakes. |
format |
Article in Journal/Newspaper |
author |
Madan, NJ Marshall, WA Laybourn-Parry, J |
author_facet |
Madan, NJ Marshall, WA Laybourn-Parry, J |
author_sort |
Madan, NJ |
title |
Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes |
title_short |
Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes |
title_full |
Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes |
title_fullStr |
Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes |
title_full_unstemmed |
Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes |
title_sort |
virus and microbial loop dynamics over an annual cycle in three contrasting antarctic lakes |
publisher |
Blackwell Publishing Ltd |
publishDate |
2005 |
url |
http://interscience.wiley.com https://doi.org/10.1111/j.1365-2427.2005.01399.x http://ecite.utas.edu.au/49050 |
long_lat |
ENVELOPE(78.188,78.188,-68.472,-68.472) ENVELOPE(78.223,78.223,-68.463,-68.463) ENVELOPE(78.240,78.240,-68.462,-68.462) |
geographic |
Ace Lake Antarctic Highway Lake Pendant Lake |
geographic_facet |
Ace Lake Antarctic Highway Lake Pendant Lake |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://ecite.utas.edu.au/49050/1/Virus -FWB PDF.pdf http://dx.doi.org/10.1111/j.1365-2427.2005.01399.x Madan, NJ and Marshall, WA and Laybourn-Parry, J, Virus and microbial loop dynamics over an annual cycle in three contrasting Antarctic lakes, Freshwater Biology, 50, (8) pp. 1291-1300. ISSN 0046-5070 (2005) [Refereed Article] http://ecite.utas.edu.au/49050 |
op_doi |
https://doi.org/10.1111/j.1365-2427.2005.01399.x |
container_title |
Freshwater Biology |
container_volume |
50 |
container_issue |
8 |
container_start_page |
1291 |
op_container_end_page |
1300 |
_version_ |
1766141343281709056 |