Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region
The distribution of the Southern Ocean (SO) biota is the result of major geological, oceanographic, and climate changes during the last 50 million years (Ma). Several groups of marine benthic organisms exhibit marked taxonomic similarities between the Antarctic Peninsula and southern South America,...
Published in: | Journal of Applied Phycology |
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Online Access: | https://doi.org/10.1007/s10811-018-1656-2 https://repositorio.uchile.cl/handle/2250/171899 |
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ftunivchile:oai:repositorio.uchile.cl:2250/171899 2023-05-15T13:56:31+02:00 Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region Ocaranza Barrera, Paula González Wevar, Claudio Guillemin, Marie-Laure Rosenfeld, Sebastián Mansilla, Andrés 2019 application/pdf https://doi.org/10.1007/s10811-018-1656-2 https://repositorio.uchile.cl/handle/2250/171899 en eng Springer Netherlands Journal of Applied Phycology (2019) 31:939–949 15735176 09218971 doi:10.1007/s10811-018-1656-2 https://repositorio.uchile.cl/handle/2250/171899 Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND Journal of Applied Phycology Antarctic Circumpolar Current Biogeography Cryptic speciation Rhodophyta Southern Ocean Vicariance Artículo de revista 2019 ftunivchile https://doi.org/10.1007/s10811-018-1656-2 2023-01-22T01:03:26Z The distribution of the Southern Ocean (SO) biota is the result of major geological, oceanographic, and climate changes during the last 50 million years (Ma). Several groups of marine benthic organisms exhibit marked taxonomic similarities between the Antarctic Peninsula and southern South America, where families, genera, and even species are currently co-distributed in these continents. Several species of macroalgae including Gigartina skottsbergii, Plocamium cartilagineum, and Iridaea cordata are currently found on both sides of the Drake Passage. Advances in molecular techniques have allowed estimating phylogenetic relationships, levels of differentiation and divergence time estimates between populations from these continents in order to determine whether they constitute separate evolutionary units. In this study, we determine whether Iridaea cordata represents the same evolutionary unit in southern South America and the Antarctic Peninsula or if populations on the two sides of the Drake Passage represent different genetic lineages. According to our results, I. cordata populations from the Antarctic Peninsula and South America are clearly distinguishable evolutionary units with 8.31% and 3.17% mtDNA and cpDNA molecular divergence, respectively. The separation between Antarctic and South American populations of I. cordata occurred at the end of the Miocene, between 5 Ma (rbcL) and 9 Ma (COI-5P). These results are similar to those reported in G. skottsbergii on both sides of the Drake Passage. Thus, I. cordata populations on the two sides of the Drake Passage should be considered two sister species. Cryptic speciation plays an important role in the evolution of the Southern Ocean; thus, the systematics, biogeography, and biodiversity of the region require major revisions. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Drake Passage Southern Ocean Universidad de Chile: Repositorio académico Antarctic Antarctic Peninsula Bory ENVELOPE(40.372,40.372,64.489,64.489) Drake Passage Saint-Vincent ENVELOPE(-59.515,-59.515,50.600,50.600) Southern Ocean The Antarctic Journal of Applied Phycology 31 2 939 949 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
topic |
Antarctic Circumpolar Current Biogeography Cryptic speciation Rhodophyta Southern Ocean Vicariance |
spellingShingle |
Antarctic Circumpolar Current Biogeography Cryptic speciation Rhodophyta Southern Ocean Vicariance Ocaranza Barrera, Paula González Wevar, Claudio Guillemin, Marie-Laure Rosenfeld, Sebastián Mansilla, Andrés Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region |
topic_facet |
Antarctic Circumpolar Current Biogeography Cryptic speciation Rhodophyta Southern Ocean Vicariance |
description |
The distribution of the Southern Ocean (SO) biota is the result of major geological, oceanographic, and climate changes during the last 50 million years (Ma). Several groups of marine benthic organisms exhibit marked taxonomic similarities between the Antarctic Peninsula and southern South America, where families, genera, and even species are currently co-distributed in these continents. Several species of macroalgae including Gigartina skottsbergii, Plocamium cartilagineum, and Iridaea cordata are currently found on both sides of the Drake Passage. Advances in molecular techniques have allowed estimating phylogenetic relationships, levels of differentiation and divergence time estimates between populations from these continents in order to determine whether they constitute separate evolutionary units. In this study, we determine whether Iridaea cordata represents the same evolutionary unit in southern South America and the Antarctic Peninsula or if populations on the two sides of the Drake Passage represent different genetic lineages. According to our results, I. cordata populations from the Antarctic Peninsula and South America are clearly distinguishable evolutionary units with 8.31% and 3.17% mtDNA and cpDNA molecular divergence, respectively. The separation between Antarctic and South American populations of I. cordata occurred at the end of the Miocene, between 5 Ma (rbcL) and 9 Ma (COI-5P). These results are similar to those reported in G. skottsbergii on both sides of the Drake Passage. Thus, I. cordata populations on the two sides of the Drake Passage should be considered two sister species. Cryptic speciation plays an important role in the evolution of the Southern Ocean; thus, the systematics, biogeography, and biodiversity of the region require major revisions. |
format |
Article in Journal/Newspaper |
author |
Ocaranza Barrera, Paula González Wevar, Claudio Guillemin, Marie-Laure Rosenfeld, Sebastián Mansilla, Andrés |
author_facet |
Ocaranza Barrera, Paula González Wevar, Claudio Guillemin, Marie-Laure Rosenfeld, Sebastián Mansilla, Andrés |
author_sort |
Ocaranza Barrera, Paula |
title |
Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region |
title_short |
Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region |
title_full |
Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region |
title_fullStr |
Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region |
title_full_unstemmed |
Molecular divergence between Iridaea cordata (Turner) Bory de Saint-Vincent from the Antarctic Peninsula and the Magellan Region |
title_sort |
molecular divergence between iridaea cordata (turner) bory de saint-vincent from the antarctic peninsula and the magellan region |
publisher |
Springer Netherlands |
publishDate |
2019 |
url |
https://doi.org/10.1007/s10811-018-1656-2 https://repositorio.uchile.cl/handle/2250/171899 |
long_lat |
ENVELOPE(40.372,40.372,64.489,64.489) ENVELOPE(-59.515,-59.515,50.600,50.600) |
geographic |
Antarctic Antarctic Peninsula Bory Drake Passage Saint-Vincent Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bory Drake Passage Saint-Vincent Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Drake Passage Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Drake Passage Southern Ocean |
op_source |
Journal of Applied Phycology |
op_relation |
Journal of Applied Phycology (2019) 31:939–949 15735176 09218971 doi:10.1007/s10811-018-1656-2 https://repositorio.uchile.cl/handle/2250/171899 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1007/s10811-018-1656-2 |
container_title |
Journal of Applied Phycology |
container_volume |
31 |
container_issue |
2 |
container_start_page |
939 |
op_container_end_page |
949 |
_version_ |
1766264020798537728 |