Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum
Terrestrial vegetation communities in Antarctica are predominantly composed by bryophytes and lichens, as the extreme climatic conditions of this remote continent limit the colonization of vascular plants to 2 species in the Antarctic Peninsula. A decline in bryophyte species richness occurs with la...
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Società Botanica Italiana
2018
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ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/2079360 2024-01-28T10:00:49+01:00 Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum Nicoletta Cannone Isabella Vanetti Omar Rota-Stabelli Peter Convey Francesco Malfasi Paolo Gerola Alberto Vianelli Mauro Guglielmin Serena Zaccara Nicoletta Cannone, Isabella Vanetti, Omar Rota-Stabelli, Peter Convey, Francesco Malfasi, Paolo Gerola, Alberto Vianelli, Mauro Guglielmin, Serena Zaccara Cannone, Nicoletta Vanetti, Isabella Rota-Stabelli, Omar Convey, Peter Malfasi, Francesco Gerola, Paolo Vianelli, Alberto Guglielmin, Mauro Zaccara, Serena 2018 ELETTRONICO http://hdl.handle.net/11383/2079360 http://www.societabotanicaitaliana.it/uploaded/6165.pdf eng eng Società Botanica Italiana country:ITA place:Firenze info:eu-repo/semantics/altIdentifier/isbn/978-88-85915-22-0 ispartofbook:113° Congresso della Società Botanica Italiana onlus V INTERNATIONAL PLANT SCIENCE CONFERENCE (IPSC) 113° Congresso della Società Botanica Italiana V INTERNATIONAL PLANT SCIENCE CONFERENCE (IPSC) firstpage:65 lastpage:65 numberofpages:1 http://hdl.handle.net/11383/2079360 http://www.societabotanicaitaliana.it/uploaded/6165.pdf Moss Antarctica info:eu-repo/semantics/conferenceObject 2018 ftuninsubriairis 2024-01-03T17:52:09Z Terrestrial vegetation communities in Antarctica are predominantly composed by bryophytes and lichens, as the extreme climatic conditions of this remote continent limit the colonization of vascular plants to 2 species in the Antarctic Peninsula. A decline in bryophyte species richness occurs with latitude across the sub-Antarctic islands, Antarctic Peninsula and Antarctic continent, with a clear continent-Antarctic Peninsula separation, consistent with the Gressitt Line, a boundary identified for the invertebrate fauna, and now demonstrated also for bryophytes, suggesting a common feature in the evolutionary history of the vegetation and invertebrate fauna. Within continental Antarctica, the highest bryophyte diversity occurs in the Ross sector, despite its location is the least favorable for species migrating from the southern Hemisphere continents. Moreover, the occurrence in Antarctica of cosmopolitan species, such as Bryum argenteum, further highlights the need to understand the origin and evolution of the Antarctic flora and to investigate the role of Antarctica in explaining the dispersal routes of taxa with transoceanic or transcontinental disjunctions, with B. argenteum being an ideal target species. We reconstructed the phylogeny and divergence times of B. argenteum, both at global scale and focusing within Antarctica and Southern Hemisphere, using the nrITS region from more than 200 samples applying a molecular clock based on previously estimated substitution rates for mosses. Our analyses indicate that the distribution patterns of B. argenteum, at global scale, are the result of major paleoclimatic events occurring across the planet, and involving differentiation and migration/colonization during periods warmer than today since the Mid Miocene Climate Optimum (MMCO), as well as fragmentation during severe cooling, such as during the extensive Antarctic glaciations in the mid Miocene 14 Ma. Bryum argenteum first extensively colonized Antarctica around 9.77 Ma during the warm Tortonian (Miocene), using ... Conference Object Antarc* Antarctic Antarctic Peninsula Antarctica IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) Antarctic Antarctic Peninsula The Antarctic |
institution |
Open Polar |
collection |
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
op_collection_id |
ftuninsubriairis |
language |
English |
topic |
Moss Antarctica |
spellingShingle |
Moss Antarctica Nicoletta Cannone Isabella Vanetti Omar Rota-Stabelli Peter Convey Francesco Malfasi Paolo Gerola Alberto Vianelli Mauro Guglielmin Serena Zaccara Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum |
topic_facet |
Moss Antarctica |
description |
Terrestrial vegetation communities in Antarctica are predominantly composed by bryophytes and lichens, as the extreme climatic conditions of this remote continent limit the colonization of vascular plants to 2 species in the Antarctic Peninsula. A decline in bryophyte species richness occurs with latitude across the sub-Antarctic islands, Antarctic Peninsula and Antarctic continent, with a clear continent-Antarctic Peninsula separation, consistent with the Gressitt Line, a boundary identified for the invertebrate fauna, and now demonstrated also for bryophytes, suggesting a common feature in the evolutionary history of the vegetation and invertebrate fauna. Within continental Antarctica, the highest bryophyte diversity occurs in the Ross sector, despite its location is the least favorable for species migrating from the southern Hemisphere continents. Moreover, the occurrence in Antarctica of cosmopolitan species, such as Bryum argenteum, further highlights the need to understand the origin and evolution of the Antarctic flora and to investigate the role of Antarctica in explaining the dispersal routes of taxa with transoceanic or transcontinental disjunctions, with B. argenteum being an ideal target species. We reconstructed the phylogeny and divergence times of B. argenteum, both at global scale and focusing within Antarctica and Southern Hemisphere, using the nrITS region from more than 200 samples applying a molecular clock based on previously estimated substitution rates for mosses. Our analyses indicate that the distribution patterns of B. argenteum, at global scale, are the result of major paleoclimatic events occurring across the planet, and involving differentiation and migration/colonization during periods warmer than today since the Mid Miocene Climate Optimum (MMCO), as well as fragmentation during severe cooling, such as during the extensive Antarctic glaciations in the mid Miocene 14 Ma. Bryum argenteum first extensively colonized Antarctica around 9.77 Ma during the warm Tortonian (Miocene), using ... |
author2 |
Nicoletta Cannone, Isabella Vanetti, Omar Rota-Stabelli, Peter Convey, Francesco Malfasi, Paolo Gerola, Alberto Vianelli, Mauro Guglielmin, Serena Zaccara Cannone, Nicoletta Vanetti, Isabella Rota-Stabelli, Omar Convey, Peter Malfasi, Francesco Gerola, Paolo Vianelli, Alberto Guglielmin, Mauro Zaccara, Serena |
format |
Conference Object |
author |
Nicoletta Cannone Isabella Vanetti Omar Rota-Stabelli Peter Convey Francesco Malfasi Paolo Gerola Alberto Vianelli Mauro Guglielmin Serena Zaccara |
author_facet |
Nicoletta Cannone Isabella Vanetti Omar Rota-Stabelli Peter Convey Francesco Malfasi Paolo Gerola Alberto Vianelli Mauro Guglielmin Serena Zaccara |
author_sort |
Nicoletta Cannone |
title |
Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum |
title_short |
Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum |
title_full |
Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum |
title_fullStr |
Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum |
title_full_unstemmed |
Diversity trends of bryophytes in Antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of Bryum argenteum |
title_sort |
diversity trends of bryophytes in antarctica are the result of adaptation, evolution and survival (including cryptobiosis): the case study of the phylogeny of bryum argenteum |
publisher |
Società Botanica Italiana |
publishDate |
2018 |
url |
http://hdl.handle.net/11383/2079360 http://www.societabotanicaitaliana.it/uploaded/6165.pdf |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/isbn/978-88-85915-22-0 ispartofbook:113° Congresso della Società Botanica Italiana onlus V INTERNATIONAL PLANT SCIENCE CONFERENCE (IPSC) 113° Congresso della Società Botanica Italiana V INTERNATIONAL PLANT SCIENCE CONFERENCE (IPSC) firstpage:65 lastpage:65 numberofpages:1 http://hdl.handle.net/11383/2079360 http://www.societabotanicaitaliana.it/uploaded/6165.pdf |
_version_ |
1789325388641468416 |