Evidence for widespread endemism among Antarctic micro-organisms
Understanding the enormous diversity of microbes, their multiple roles in the functioning of ecosystems, and their response to large-scale environmental and climatic changes, are at the forefront of the international research agenda. In Antarctica, where terrestrial and lacustrine environments are p...
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ftvliz:oai:oma.vliz.be:199697 2023-05-15T13:33:15+02:00 Evidence for widespread endemism among Antarctic micro-organisms Vyverman, W. Verleyen, E. Wilmotte, A. Hodgson, D.A. Willems, A. Peeters, K. Van de Vijver, B. De Wever, A. Leliaert, F. Sabbe, K. 2010 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=199697 en eng info:eu-repo/semantics/altIdentifier/wos/000209450100003 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.polar.2010.03.006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=199697 info:eu-repo/semantics/restrictedAccess %3Ci%3EPolar+Science+4%282%29%3C%2Fi%3E%3A+103-113.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.polar.2010.03.006%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.polar.2010.03.006%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2010 ftvliz https://doi.org/10.1016/j.polar.2010.03.006 2022-05-01T09:23:04Z Understanding the enormous diversity of microbes, their multiple roles in the functioning of ecosystems, and their response to large-scale environmental and climatic changes, are at the forefront of the international research agenda. In Antarctica, where terrestrial and lacustrine environments are predominantly microbial realms, an active and growing community of microbial ecologists is probing this diversity and its role in ecosystem processes. In a broader context, this work has the potential to make a significant contribution to the long-standing debate as to whether microbes are fundamentally different from macroorganisms in their biogeography. According to the ubiquity hypothesis, microbial community composition is not constrained by dispersal limitation and is solely the result of species sorting along environmental gradients. However, recent work on several groups of microalgae is challenging this view. Global analyses using morphology-based diatom inventories have demonstrated that, in addition to environmental harshness, geographical isolation underlies the strong latitudinal gradients in local and regional diversity in the Southern hemisphere. Increasing evidence points to a strong regionalization of diatom floras in the Antarctic and sub-Antarctic regions, mirroring the biogeographical regions that have been recognized for macroorganisms. Likewise, the application of molecular-phylogenetic techniques to cultured and uncultured diversity revealed a high number of Antarctic endemics among cyanobacteria and green algae. Calibration of these phylogenies suggests that several clades have an ancient evolutionary history within the Antarctic continent, possibly dating back to 330 Ma. These findings are in line with the current view on the origin of Antarctic terrestrial metazoa, including springtails, chironomids and mites, with most evidence suggesting a long history of geographic isolation on a multi-million year, even pre-Gondwana break-up timescale. Article in Journal/Newspaper Antarc* Antarctic Antarctica Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic The Antarctic Polar Science 4 2 103 113 |
institution |
Open Polar |
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Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Understanding the enormous diversity of microbes, their multiple roles in the functioning of ecosystems, and their response to large-scale environmental and climatic changes, are at the forefront of the international research agenda. In Antarctica, where terrestrial and lacustrine environments are predominantly microbial realms, an active and growing community of microbial ecologists is probing this diversity and its role in ecosystem processes. In a broader context, this work has the potential to make a significant contribution to the long-standing debate as to whether microbes are fundamentally different from macroorganisms in their biogeography. According to the ubiquity hypothesis, microbial community composition is not constrained by dispersal limitation and is solely the result of species sorting along environmental gradients. However, recent work on several groups of microalgae is challenging this view. Global analyses using morphology-based diatom inventories have demonstrated that, in addition to environmental harshness, geographical isolation underlies the strong latitudinal gradients in local and regional diversity in the Southern hemisphere. Increasing evidence points to a strong regionalization of diatom floras in the Antarctic and sub-Antarctic regions, mirroring the biogeographical regions that have been recognized for macroorganisms. Likewise, the application of molecular-phylogenetic techniques to cultured and uncultured diversity revealed a high number of Antarctic endemics among cyanobacteria and green algae. Calibration of these phylogenies suggests that several clades have an ancient evolutionary history within the Antarctic continent, possibly dating back to 330 Ma. These findings are in line with the current view on the origin of Antarctic terrestrial metazoa, including springtails, chironomids and mites, with most evidence suggesting a long history of geographic isolation on a multi-million year, even pre-Gondwana break-up timescale. |
format |
Article in Journal/Newspaper |
author |
Vyverman, W. Verleyen, E. Wilmotte, A. Hodgson, D.A. Willems, A. Peeters, K. Van de Vijver, B. De Wever, A. Leliaert, F. Sabbe, K. |
spellingShingle |
Vyverman, W. Verleyen, E. Wilmotte, A. Hodgson, D.A. Willems, A. Peeters, K. Van de Vijver, B. De Wever, A. Leliaert, F. Sabbe, K. Evidence for widespread endemism among Antarctic micro-organisms |
author_facet |
Vyverman, W. Verleyen, E. Wilmotte, A. Hodgson, D.A. Willems, A. Peeters, K. Van de Vijver, B. De Wever, A. Leliaert, F. Sabbe, K. |
author_sort |
Vyverman, W. |
title |
Evidence for widespread endemism among Antarctic micro-organisms |
title_short |
Evidence for widespread endemism among Antarctic micro-organisms |
title_full |
Evidence for widespread endemism among Antarctic micro-organisms |
title_fullStr |
Evidence for widespread endemism among Antarctic micro-organisms |
title_full_unstemmed |
Evidence for widespread endemism among Antarctic micro-organisms |
title_sort |
evidence for widespread endemism among antarctic micro-organisms |
publishDate |
2010 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=199697 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000209450100003 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.polar.2010.03.006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=199697 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.polar.2010.03.006 |
container_title |
Polar Science |
container_volume |
4 |
container_issue |
2 |
container_start_page |
103 |
op_container_end_page |
113 |
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1766040349310976000 |