Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica
The colonization capacity and demographic structure of populations of Deschampsia antarctica and Colobanthus quitensis were studied in different microhabitats between 10 and 147 m a.s.l. on Livingston Island, South Shetland Islands, near the Spanish Antarctic base Juan Carlos I, in February 2002. At...
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Norwegian Polar Institute
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ftdoajarticles:oai:doaj.org/article:83c6c6ac07014db488fae01b59a45a24 2023-05-15T14:03:19+02:00 Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica María Luisa Vera 2011-05-01T00:00:00Z https://doi.org/10.3402/polar.v30i0.7146 https://doaj.org/article/83c6c6ac07014db488fae01b59a45a24 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/view/7146/pdf_92 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 doi:10.3402/polar.v30i0.7146 0800-0395 1751-8369 https://doaj.org/article/83c6c6ac07014db488fae01b59a45a24 Polar Research, Vol 30, Iss 0, Pp 1-10 (2011) Antarctic vascular plants altitude and habitat effect colonization population structure Environmental sciences GE1-350 Oceanography GC1-1581 article 2011 ftdoajarticles https://doi.org/10.3402/polar.v30i0.7146 2022-12-31T08:35:58Z The colonization capacity and demographic structure of populations of Deschampsia antarctica and Colobanthus quitensis were studied in different microhabitats between 10 and 147 m a.s.l. on Livingston Island, South Shetland Islands, near the Spanish Antarctic base Juan Carlos I, in February 2002. At the highest site (147 m a.s.l.), mean temperatures were about 1°C lower than at sea level. Both species are less common in inland areas and at the highest altitudes only occur at restricted sites that are frequently snow-free in the early austral summer. The diameters of the largest plants (C. quitensis cushions 7–8 cm; D. antarctica tufts 10–11 cm) in the populations growing at the highest altitudes (110 and 147 m a.s.l.) suggest that these populations were established about 24–28 years ago. The largest diameter plants (Deschampsia 20 cm; Colobanthus 18 cm) were found at the lowest altitudes on deep soil. The presence of numerous seedlings and young individuals on the periphery of populations established several years ago or at recently colonized sites suggests an active process of expansion. There were more emerged seedlings of C. quitensis than of D. antarctica, but the density of established individuals was higher for D. antarctica, suggesting these species have different demographic strategies. Article in Journal/Newspaper Antarc* Antarctic Antarctica Livingston Island Polar Research South Shetland Islands Directory of Open Access Journals: DOAJ Articles Antarctic Austral Base Juan Carlos I ENVELOPE(-60.383,-60.383,-62.650,-62.650) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Shetland Islands Polar Research 30 1 7146 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic vascular plants altitude and habitat effect colonization population structure Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Antarctic vascular plants altitude and habitat effect colonization population structure Environmental sciences GE1-350 Oceanography GC1-1581 María Luisa Vera Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica |
topic_facet |
Antarctic vascular plants altitude and habitat effect colonization population structure Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
The colonization capacity and demographic structure of populations of Deschampsia antarctica and Colobanthus quitensis were studied in different microhabitats between 10 and 147 m a.s.l. on Livingston Island, South Shetland Islands, near the Spanish Antarctic base Juan Carlos I, in February 2002. At the highest site (147 m a.s.l.), mean temperatures were about 1°C lower than at sea level. Both species are less common in inland areas and at the highest altitudes only occur at restricted sites that are frequently snow-free in the early austral summer. The diameters of the largest plants (C. quitensis cushions 7–8 cm; D. antarctica tufts 10–11 cm) in the populations growing at the highest altitudes (110 and 147 m a.s.l.) suggest that these populations were established about 24–28 years ago. The largest diameter plants (Deschampsia 20 cm; Colobanthus 18 cm) were found at the lowest altitudes on deep soil. The presence of numerous seedlings and young individuals on the periphery of populations established several years ago or at recently colonized sites suggests an active process of expansion. There were more emerged seedlings of C. quitensis than of D. antarctica, but the density of established individuals was higher for D. antarctica, suggesting these species have different demographic strategies. |
format |
Article in Journal/Newspaper |
author |
María Luisa Vera |
author_facet |
María Luisa Vera |
author_sort |
María Luisa Vera |
title |
Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica |
title_short |
Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica |
title_full |
Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica |
title_fullStr |
Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica |
title_full_unstemmed |
Colonization and demographic structure of Deschampsia antarctica and Colobanthus quitensis along an altitudinal gradient on Livingston Island, South Shetland Islands, Antarctica |
title_sort |
colonization and demographic structure of deschampsia antarctica and colobanthus quitensis along an altitudinal gradient on livingston island, south shetland islands, antarctica |
publisher |
Norwegian Polar Institute |
publishDate |
2011 |
url |
https://doi.org/10.3402/polar.v30i0.7146 https://doaj.org/article/83c6c6ac07014db488fae01b59a45a24 |
long_lat |
ENVELOPE(-60.383,-60.383,-62.650,-62.650) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Austral Base Juan Carlos I Livingston Island South Shetland Islands |
geographic_facet |
Antarctic Austral Base Juan Carlos I Livingston Island South Shetland Islands |
genre |
Antarc* Antarctic Antarctica Livingston Island Polar Research South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Livingston Island Polar Research South Shetland Islands |
op_source |
Polar Research, Vol 30, Iss 0, Pp 1-10 (2011) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/view/7146/pdf_92 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 doi:10.3402/polar.v30i0.7146 0800-0395 1751-8369 https://doaj.org/article/83c6c6ac07014db488fae01b59a45a24 |
op_doi |
https://doi.org/10.3402/polar.v30i0.7146 |
container_title |
Polar Research |
container_volume |
30 |
container_issue |
1 |
container_start_page |
7146 |
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1766273933598785536 |