Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean

The actual Arctic biota shows a strong affinity with that of the Boreal Atlantic and Pacific ones, as a result of an active recolonization process after the Quaternary glaciations. The geographic distribution of sessile species is usually linked to larvae dispersive capabilities which can be directl...

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Published in:Journal of Experimental Marine Biology and Ecology
Main Authors: Demarchi, Maria Milagros, Chiappero, Marina Beatriz, Laudien, Jürgen, Sahade, Ricardo Jose
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier Science
Subjects:
Online Access:http://hdl.handle.net/11336/242172
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author Demarchi, Maria Milagros
Chiappero, Marina Beatriz
Laudien, Jürgen
Sahade, Ricardo Jose
author_facet Demarchi, Maria Milagros
Chiappero, Marina Beatriz
Laudien, Jürgen
Sahade, Ricardo Jose
author_sort Demarchi, Maria Milagros
collection CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
container_issue 1
container_start_page 29
container_title Journal of Experimental Marine Biology and Ecology
container_volume 364
description The actual Arctic biota shows a strong affinity with that of the Boreal Atlantic and Pacific ones, as a result of an active recolonization process after the Quaternary glaciations. The geographic distribution of sessile species is usually linked to larvae dispersive capabilities which can be directly related with time spent in the plankton. Ascidians larvae are lecitothorphic and short-lived, which suggest that ascidians could be not efficient dispersers. However, the solitary ascidian Styela rustica (Linnaeus, 1767) (Tunicata, Ascidiacea) shows a wide distribution pattern from the North Atlantic to the Arctic that, together with the relatively recent colonization of the Arctic system could indicate that this species efficiently disperses and colonizes new habitats. In this study we used ISSR-PCR markers to study the genetic structure of five populations of the ascidian Styela rustica at Kongsfjorden, west Spitsbergen (Svalbard archipelago). We analyzed whether this species presents a low genetic structure, as can be expected due to the historical process of recent post glaciations colonization, or if there is genetic differentiation at a local scale, caused by short-lived larvae and limited dispersal potential. The genetic diversity in each population assessed using the marker diversity index (M) ranged from 0.288 to 0.324. Population HN, situated close to a fast retreating glacier, showed the lowest diversity. Processes associated with deglatiation (icebergs calving from the glacier that scour the benthos and the increment of inorganic particulate matter on the water column) would drive to reduced population sizes and explain the reduced genetic variability observed in the HN population with respect to the others in the fjord. This suggests a possible linkage with the global warming process. Although the weak genetic structure found among the studied populations could indicate a founder effect, the genetic landscape shape analysis together with a positive relationship between genetic and geographic distances ...
format Article in Journal/Newspaper
genre Arctic
Arctic Ocean
glacier
Global warming
Iceberg*
Kongsfjord*
Kongsfjorden
North Atlantic
Svalbard
Spitsbergen
genre_facet Arctic
Arctic Ocean
glacier
Global warming
Iceberg*
Kongsfjord*
Kongsfjorden
North Atlantic
Svalbard
Spitsbergen
geographic Arctic
Arctic Ocean
Kongsfjord
Pacific
Svalbard
Svalbard Archipelago
geographic_facet Arctic
Arctic Ocean
Kongsfjord
Pacific
Svalbard
Svalbard Archipelago
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institution Open Polar
language English
long_lat ENVELOPE(29.319,29.319,70.721,70.721)
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op_doi https://doi.org/10.1016/j.jembe.2008.06.022
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http://hdl.handle.net/11336/242172
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publisher Elsevier Science
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spelling ftconicet:oai:ri.conicet.gov.ar:11336/242172 2025-01-16T20:19:58+00:00 Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean Demarchi, Maria Milagros Chiappero, Marina Beatriz Laudien, Jürgen Sahade, Ricardo Jose application/pdf http://hdl.handle.net/11336/242172 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022098108002918 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jembe.2008.06.022 http://hdl.handle.net/11336/242172 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ARCTIC ASCIDIAN GENETIC STRUCTURE https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.jembe.2008.06.022 2024-10-04T09:34:05Z The actual Arctic biota shows a strong affinity with that of the Boreal Atlantic and Pacific ones, as a result of an active recolonization process after the Quaternary glaciations. The geographic distribution of sessile species is usually linked to larvae dispersive capabilities which can be directly related with time spent in the plankton. Ascidians larvae are lecitothorphic and short-lived, which suggest that ascidians could be not efficient dispersers. However, the solitary ascidian Styela rustica (Linnaeus, 1767) (Tunicata, Ascidiacea) shows a wide distribution pattern from the North Atlantic to the Arctic that, together with the relatively recent colonization of the Arctic system could indicate that this species efficiently disperses and colonizes new habitats. In this study we used ISSR-PCR markers to study the genetic structure of five populations of the ascidian Styela rustica at Kongsfjorden, west Spitsbergen (Svalbard archipelago). We analyzed whether this species presents a low genetic structure, as can be expected due to the historical process of recent post glaciations colonization, or if there is genetic differentiation at a local scale, caused by short-lived larvae and limited dispersal potential. The genetic diversity in each population assessed using the marker diversity index (M) ranged from 0.288 to 0.324. Population HN, situated close to a fast retreating glacier, showed the lowest diversity. Processes associated with deglatiation (icebergs calving from the glacier that scour the benthos and the increment of inorganic particulate matter on the water column) would drive to reduced population sizes and explain the reduced genetic variability observed in the HN population with respect to the others in the fjord. This suggests a possible linkage with the global warming process. Although the weak genetic structure found among the studied populations could indicate a founder effect, the genetic landscape shape analysis together with a positive relationship between genetic and geographic distances ... Article in Journal/Newspaper Arctic Arctic Ocean glacier Global warming Iceberg* Kongsfjord* Kongsfjorden North Atlantic Svalbard Spitsbergen CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Arctic Arctic Ocean Kongsfjord ENVELOPE(29.319,29.319,70.721,70.721) Pacific Svalbard Svalbard Archipelago Journal of Experimental Marine Biology and Ecology 364 1 29 34
spellingShingle ARCTIC
ASCIDIAN
GENETIC STRUCTURE
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
Demarchi, Maria Milagros
Chiappero, Marina Beatriz
Laudien, Jürgen
Sahade, Ricardo Jose
Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean
title Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean
title_full Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean
title_fullStr Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean
title_full_unstemmed Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean
title_short Population genetic structure of the ascidian Styela rustica at Kongsfjord, Svalbard, Arctic Ocean
title_sort population genetic structure of the ascidian styela rustica at kongsfjord, svalbard, arctic ocean
topic ARCTIC
ASCIDIAN
GENETIC STRUCTURE
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
topic_facet ARCTIC
ASCIDIAN
GENETIC STRUCTURE
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
url http://hdl.handle.net/11336/242172