Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes
peer reviewed 1. Lakes and ponds in the Larsemann Hills and Bolingen Islands (East-Antarctica) were characterised by cyanobacteria-dominated, benthic microbial mats. A 56-lake dataset representing the limnological diversity among the more than 150 lakes and ponds in the region was developed to ident...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Blackwell Publishing Ltd
2004
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Online Access: | https://orbi.uliege.be/handle/2268/17375 https://orbi.uliege.be/bitstream/2268/17375/1/SalinitydepthmatsSabbeFB04.pdf https://doi.org/10.1111/j.1365-2427.2004.01186.x |
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ftorbi:oai:orbi.ulg.ac.be:2268/17375 2024-04-21T07:47:50+00:00 Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes Sabbe, Koen Hodgson, Dominic A. Verleyen, Elie Taton, Arnaud Wilmotte, Annick Vanhoutte, Koenraad Vyverman, Wim 2004-03 https://orbi.uliege.be/handle/2268/17375 https://orbi.uliege.be/bitstream/2268/17375/1/SalinitydepthmatsSabbeFB04.pdf https://doi.org/10.1111/j.1365-2427.2004.01186.x en eng Blackwell Publishing Ltd urn:issn:0046-5070 urn:issn:1365-2427 https://orbi.uliege.be/handle/2268/17375 info:hdl:2268/17375 https://orbi.uliege.be/bitstream/2268/17375/1/SalinitydepthmatsSabbeFB04.pdf doi:10.1111/j.1365-2427.2004.01186.x scopus-id:2-s2.0-1442314146 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Freshwater Biology, 49 (3), 296-319 (2004-03) Antarctica conductivity cyanobacteria diatom microbial mat Life sciences Microbiology Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Microbiologie Sciences aquatiques & océanologie Sciences de l’environnement & écologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2004 ftorbi https://doi.org/10.1111/j.1365-2427.2004.01186.x 2024-03-27T14:55:59Z peer reviewed 1. Lakes and ponds in the Larsemann Hills and Bolingen Islands (East-Antarctica) were characterised by cyanobacteria-dominated, benthic microbial mats. A 56-lake dataset representing the limnological diversity among the more than 150 lakes and ponds in the region was developed to identify and quantify the abiotic conditions associated with cyanobacterial and diatom communities. 2. Limnological diversity in the lakes of the Larsemann Hills and Bolingen Islands was associated primarily with conductivity and conductivity-related variables (concentrations of major ions and alkalinity), and variation in lake morphometry (depth, catchment and lake area). Low concentrations of pigments, phosphate, nitrogen, DOC and TOC in the water column of most lakes suggest extremely low water column productivity and hence high water clarity, and may thus contribute to the ecological success of benthic microbial mats in this region. 3. Benthic communities consisted of prostrate and sometimes finely laminated mats, flake mats, epilithic and interstitial microbial mats. Mat physiognomy and carotenoid/chlorophyll ratios were strongly related to lake depth, but not to conductivity. 4. Morphological-taxonomic analyses revealed the presence of 26 diatom morphospecies and 33 cyanobacterial morphotypes. Mats of shallow lakes (interstitial and flake mats) and those of deeper lakes (prostrate mats) were characterised by different dominant cyanobacterial morphotypes. No relationship was found between the distribution of these morphotypes and conductivity. In contrast, variation in diatom species composition was strongly related to both lake depth and conductivity. Shallow ponds were mainly characterised by aerial diatoms (e.g. Diadesmis cf. perpusilla and Hantzschia spp.). In deep lakes, communities were dominated by Psammothidium abundans and Stauroforma inermis. Lakes with conductivities higher than +/-1.5 mS cm(-1) became susceptible to freezing out of salts and hence pronounced conductivity fluctuations. In these lakes P. ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica University of Liège: ORBi (Open Repository and Bibliography) Freshwater Biology 49 3 296 319 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Antarctica conductivity cyanobacteria diatom microbial mat Life sciences Microbiology Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Microbiologie Sciences aquatiques & océanologie Sciences de l’environnement & écologie |
spellingShingle |
Antarctica conductivity cyanobacteria diatom microbial mat Life sciences Microbiology Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Microbiologie Sciences aquatiques & océanologie Sciences de l’environnement & écologie Sabbe, Koen Hodgson, Dominic A. Verleyen, Elie Taton, Arnaud Wilmotte, Annick Vanhoutte, Koenraad Vyverman, Wim Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes |
topic_facet |
Antarctica conductivity cyanobacteria diatom microbial mat Life sciences Microbiology Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Microbiologie Sciences aquatiques & océanologie Sciences de l’environnement & écologie |
description |
peer reviewed 1. Lakes and ponds in the Larsemann Hills and Bolingen Islands (East-Antarctica) were characterised by cyanobacteria-dominated, benthic microbial mats. A 56-lake dataset representing the limnological diversity among the more than 150 lakes and ponds in the region was developed to identify and quantify the abiotic conditions associated with cyanobacterial and diatom communities. 2. Limnological diversity in the lakes of the Larsemann Hills and Bolingen Islands was associated primarily with conductivity and conductivity-related variables (concentrations of major ions and alkalinity), and variation in lake morphometry (depth, catchment and lake area). Low concentrations of pigments, phosphate, nitrogen, DOC and TOC in the water column of most lakes suggest extremely low water column productivity and hence high water clarity, and may thus contribute to the ecological success of benthic microbial mats in this region. 3. Benthic communities consisted of prostrate and sometimes finely laminated mats, flake mats, epilithic and interstitial microbial mats. Mat physiognomy and carotenoid/chlorophyll ratios were strongly related to lake depth, but not to conductivity. 4. Morphological-taxonomic analyses revealed the presence of 26 diatom morphospecies and 33 cyanobacterial morphotypes. Mats of shallow lakes (interstitial and flake mats) and those of deeper lakes (prostrate mats) were characterised by different dominant cyanobacterial morphotypes. No relationship was found between the distribution of these morphotypes and conductivity. In contrast, variation in diatom species composition was strongly related to both lake depth and conductivity. Shallow ponds were mainly characterised by aerial diatoms (e.g. Diadesmis cf. perpusilla and Hantzschia spp.). In deep lakes, communities were dominated by Psammothidium abundans and Stauroforma inermis. Lakes with conductivities higher than +/-1.5 mS cm(-1) became susceptible to freezing out of salts and hence pronounced conductivity fluctuations. In these lakes P. ... |
format |
Article in Journal/Newspaper |
author |
Sabbe, Koen Hodgson, Dominic A. Verleyen, Elie Taton, Arnaud Wilmotte, Annick Vanhoutte, Koenraad Vyverman, Wim |
author_facet |
Sabbe, Koen Hodgson, Dominic A. Verleyen, Elie Taton, Arnaud Wilmotte, Annick Vanhoutte, Koenraad Vyverman, Wim |
author_sort |
Sabbe, Koen |
title |
Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes |
title_short |
Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes |
title_full |
Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes |
title_fullStr |
Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes |
title_full_unstemmed |
Salinity, depth and the structure and composition of microbial mats in continental Antarctic lakes |
title_sort |
salinity, depth and the structure and composition of microbial mats in continental antarctic lakes |
publisher |
Blackwell Publishing Ltd |
publishDate |
2004 |
url |
https://orbi.uliege.be/handle/2268/17375 https://orbi.uliege.be/bitstream/2268/17375/1/SalinitydepthmatsSabbeFB04.pdf https://doi.org/10.1111/j.1365-2427.2004.01186.x |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Freshwater Biology, 49 (3), 296-319 (2004-03) |
op_relation |
urn:issn:0046-5070 urn:issn:1365-2427 https://orbi.uliege.be/handle/2268/17375 info:hdl:2268/17375 https://orbi.uliege.be/bitstream/2268/17375/1/SalinitydepthmatsSabbeFB04.pdf doi:10.1111/j.1365-2427.2004.01186.x scopus-id:2-s2.0-1442314146 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/j.1365-2427.2004.01186.x |
container_title |
Freshwater Biology |
container_volume |
49 |
container_issue |
3 |
container_start_page |
296 |
op_container_end_page |
319 |
_version_ |
1796947264263946240 |