Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction
Abstract Aim This paper seeks to investigate whether alpine floras on isolated mountains in boreal forest show nestedness, and, if that is the case, to determine whether selective extinction or colonization is the likely cause of the observed patterns. Location Isolated mountains in the boreal conif...
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crwiley:10.1046/j.1365-2699.2003.00806.x 2024-06-02T08:12:12+00:00 Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction Bruun, Hans Henrik Moen, Jon 2003 http://dx.doi.org/10.1046/j.1365-2699.2003.00806.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2699.2003.00806.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2699.2003.00806.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 30, issue 2, page 297-303 ISSN 0305-0270 1365-2699 journal-article 2003 crwiley https://doi.org/10.1046/j.1365-2699.2003.00806.x 2024-05-03T11:09:57Z Abstract Aim This paper seeks to investigate whether alpine floras on isolated mountains in boreal forest show nestedness, and, if that is the case, to determine whether selective extinction or colonization is the likely cause of the observed patterns. Location Isolated mountains in the boreal coniferous forests of northern Sweden (province of Norrbotten, c . 66°N; 18°E). The timberline in the region probably has been 300–400 m above the present some thousands of years before present, potentially covering these mountains. Methods A data matrix of twenty‐seven alpine plant species on twenty‐seven isolated mountains was subjected to nested subsets analysis. Extinction probability was assumed to increase with decreasing area, and colonization probability was assumed to decrease with increasing isolation. By sorting the data matrix by these factors and sequentially computing the degree of nestedness, we were able to determine whether the alpine floras were structured mainly by selective extinction or mainly by differential colonization. Results When ordered by decreasing area the data matrix was significantly more nested than random, but that was not the case when ordered by decreasing isolation. Ordering by maximum altitude also produced significant nestedness. Main conclusions Contrary to the conventional view that isolated mountains were completely covered with boreal forest some thousands of years ago, the nestedness patterns of alpine plants indicate that many of them survived the forest period on the isolated mountains, probably on cliffs and slopes too steep for the formation of closed forest. Article in Journal/Newspaper Northern Sweden Norrbotten Wiley Online Library Journal of Biogeography 30 2 297 303 |
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English |
description |
Abstract Aim This paper seeks to investigate whether alpine floras on isolated mountains in boreal forest show nestedness, and, if that is the case, to determine whether selective extinction or colonization is the likely cause of the observed patterns. Location Isolated mountains in the boreal coniferous forests of northern Sweden (province of Norrbotten, c . 66°N; 18°E). The timberline in the region probably has been 300–400 m above the present some thousands of years before present, potentially covering these mountains. Methods A data matrix of twenty‐seven alpine plant species on twenty‐seven isolated mountains was subjected to nested subsets analysis. Extinction probability was assumed to increase with decreasing area, and colonization probability was assumed to decrease with increasing isolation. By sorting the data matrix by these factors and sequentially computing the degree of nestedness, we were able to determine whether the alpine floras were structured mainly by selective extinction or mainly by differential colonization. Results When ordered by decreasing area the data matrix was significantly more nested than random, but that was not the case when ordered by decreasing isolation. Ordering by maximum altitude also produced significant nestedness. Main conclusions Contrary to the conventional view that isolated mountains were completely covered with boreal forest some thousands of years ago, the nestedness patterns of alpine plants indicate that many of them survived the forest period on the isolated mountains, probably on cliffs and slopes too steep for the formation of closed forest. |
format |
Article in Journal/Newspaper |
author |
Bruun, Hans Henrik Moen, Jon |
spellingShingle |
Bruun, Hans Henrik Moen, Jon Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
author_facet |
Bruun, Hans Henrik Moen, Jon |
author_sort |
Bruun, Hans Henrik |
title |
Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
title_short |
Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
title_full |
Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
title_fullStr |
Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
title_full_unstemmed |
Nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
title_sort |
nested communities of alpine plants on isolated mountains: relative importance of colonization and extinction |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1046/j.1365-2699.2003.00806.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2699.2003.00806.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2699.2003.00806.x |
genre |
Northern Sweden Norrbotten |
genre_facet |
Northern Sweden Norrbotten |
op_source |
Journal of Biogeography volume 30, issue 2, page 297-303 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2699.2003.00806.x |
container_title |
Journal of Biogeography |
container_volume |
30 |
container_issue |
2 |
container_start_page |
297 |
op_container_end_page |
303 |
_version_ |
1800758561991557120 |