The Gondwanan legacy in South American biogeography
Abstract The tropical conservatism hypothesis ( TCH ) suggests that phylogenetic niche conservatism (the tendency for traits to be maintained during diversification) should be the main driver of latitudinal diversity gradients. For example, the tropical–temperate diversity gradient for woody angiosp...
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crwiley:10.1111/jbi.12459 2024-06-23T07:46:52+00:00 The Gondwanan legacy in South American biogeography Segovia, Ricardo A. Armesto, Juan J. Svenning, Jens‐Christian FONDECYT CONICYT-PFB 23 2015 http://dx.doi.org/10.1111/jbi.12459 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjbi.12459 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.12459 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 42, issue 2, page 209-217 ISSN 0305-0270 1365-2699 journal-article 2015 crwiley https://doi.org/10.1111/jbi.12459 2024-06-06T04:21:59Z Abstract The tropical conservatism hypothesis ( TCH ) suggests that phylogenetic niche conservatism (the tendency for traits to be maintained during diversification) should be the main driver of latitudinal diversity gradients. For example, the tropical–temperate diversity gradient for woody angiosperms should reflect the tropical, older origin of most clades, the constrained evolution of cold tolerance, and the fact that few clades were able to persist in temperate zones after the beginning of the global cooling in the Eocene. Evidence for this explanation has been discussed primarily from a Northern Hemisphere perspective. Recently, two studies have presented diversity and clade–age relationships in South American forests that are inconsistent with the TCH , with older woody families being more frequent at higher latitudes and higher elevations in the Andes. We argue that a broader framework considering the ancient history of the Southern Hemisphere flora and the recent history of the Andean flora can help explain these discordant patterns. Here, we provide an initial discussion of this new perspective, emphasizing the historical development of a unique and rich palaeoflora of Gondwanan ancestry at mid‐ to high latitudes of South America and Antarctica. We suggest that the idea of Austral niche conservatism ( ANC ) of a warm‐temperate Antarctic–South American biota should be explored further to improve our understanding of biogeographical patterns in the Southern Hemisphere. Article in Journal/Newspaper Antarc* Antarctic Antarctica Wiley Online Library Antarctic Austral Journal of Biogeography 42 2 209 217 |
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English |
description |
Abstract The tropical conservatism hypothesis ( TCH ) suggests that phylogenetic niche conservatism (the tendency for traits to be maintained during diversification) should be the main driver of latitudinal diversity gradients. For example, the tropical–temperate diversity gradient for woody angiosperms should reflect the tropical, older origin of most clades, the constrained evolution of cold tolerance, and the fact that few clades were able to persist in temperate zones after the beginning of the global cooling in the Eocene. Evidence for this explanation has been discussed primarily from a Northern Hemisphere perspective. Recently, two studies have presented diversity and clade–age relationships in South American forests that are inconsistent with the TCH , with older woody families being more frequent at higher latitudes and higher elevations in the Andes. We argue that a broader framework considering the ancient history of the Southern Hemisphere flora and the recent history of the Andean flora can help explain these discordant patterns. Here, we provide an initial discussion of this new perspective, emphasizing the historical development of a unique and rich palaeoflora of Gondwanan ancestry at mid‐ to high latitudes of South America and Antarctica. We suggest that the idea of Austral niche conservatism ( ANC ) of a warm‐temperate Antarctic–South American biota should be explored further to improve our understanding of biogeographical patterns in the Southern Hemisphere. |
author2 |
Svenning, Jens‐Christian FONDECYT CONICYT-PFB 23 |
format |
Article in Journal/Newspaper |
author |
Segovia, Ricardo A. Armesto, Juan J. |
spellingShingle |
Segovia, Ricardo A. Armesto, Juan J. The Gondwanan legacy in South American biogeography |
author_facet |
Segovia, Ricardo A. Armesto, Juan J. |
author_sort |
Segovia, Ricardo A. |
title |
The Gondwanan legacy in South American biogeography |
title_short |
The Gondwanan legacy in South American biogeography |
title_full |
The Gondwanan legacy in South American biogeography |
title_fullStr |
The Gondwanan legacy in South American biogeography |
title_full_unstemmed |
The Gondwanan legacy in South American biogeography |
title_sort |
gondwanan legacy in south american biogeography |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/jbi.12459 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjbi.12459 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.12459 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Journal of Biogeography volume 42, issue 2, page 209-217 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jbi.12459 |
container_title |
Journal of Biogeography |
container_volume |
42 |
container_issue |
2 |
container_start_page |
209 |
op_container_end_page |
217 |
_version_ |
1802648873382969344 |