The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae)
The largest habitat on Earth, the abyssal oceans below 3500 m depth, is commonly assumed to represent a continuous environment due to homogeneity of environmental factors and the lack of physical barriers. Yet, the presence of bathymetric features, such as Mid-Ocean Ridges, and hadal trenches provid...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | https://biblio.ugent.be/publication/8560837 http://hdl.handle.net/1854/LU-8560837 https://doi.org/10.1016/j.dsr2.2017.10.005 https://biblio.ugent.be/publication/8560837/file/8609227 |
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ftunivgent:oai:archive.ugent.be:8560837 2023-06-11T04:14:58+02:00 The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) Riehl, Torben Lins Pereira, Lidia Brandt, Angelika Brandt, Angelika Kaiser, Stefanie Riehl, Torben 2018 application/pdf https://biblio.ugent.be/publication/8560837 http://hdl.handle.net/1854/LU-8560837 https://doi.org/10.1016/j.dsr2.2017.10.005 https://biblio.ugent.be/publication/8560837/file/8609227 eng eng https://biblio.ugent.be/publication/8560837 http://hdl.handle.net/1854/LU-8560837 http://dx.doi.org/10.1016/j.dsr2.2017.10.005 https://biblio.ugent.be/publication/8560837/file/8609227 No license (in copyright) info:eu-repo/semantics/restrictedAccess DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY ISSN: 0967-0645 Biology and Life Sciences Earth and Environmental Sciences Isolation by distance Species range Dispersal Biogeography Peracarida Speciation Variance Population genetics VEMA FRACTURE-ZONE SOURCE-SINK HYPOTHESIS PUERTO-RICO TRENCH DEEP-SEA FAUNA SOUTHERN-OCEAN HARPACTICOID COPEPODS POPULATION-STRUCTURE MITOCHONDRIAL-DNA SPECIES-DIVERSITY BIOLOGICAL IDENTIFICATIONS journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.1016/j.dsr2.2017.10.005 2023-05-10T22:27:09Z The largest habitat on Earth, the abyssal oceans below 3500 m depth, is commonly assumed to represent a continuous environment due to homogeneity of environmental factors and the lack of physical barriers. Yet, the presence of bathymetric features, such as Mid-Ocean Ridges, and hadal trenches provide a discontinuation. During the Vema-TRANSIT expedition in 2014/2015 to the tropical North Atlantic, a transatlantic transect was studied following the full extent of the Vema Fracture Zone in an east-west direction and including the Puerto Rico Trench (PRT). The aim of this study was to test whether large bathymetric features represent barriers to dispersal and may lead to differentiation and eventually speciation. In this study, these potential barriers included the Mid-Atlantic Ridge (MAR) and the transition (similar to 3000 m) from the hadal PRT to the adjacent abyss. Genetic differentiation and differences in community structure (species composition) from east and west of the MAR, as well as abyssal and hadal depth zones were tested for using the poor dispersers Macrostylidae (Crustacea, Isopoda) as a model Distribution patterns showed that certain macrostylid species have ranges extending more than 2000 km, in some cases across oceanic ridges and trench-abyss transitions. Contrastingly, there was a clear signal for geographic population structure coinciding with the east-west division of the Atlantic by the MAR as well as with the abyss-hadal zonation. These results support the hypotheses that depth gradients as well as oceanic ridges reduce dispersal even though barriers may not be absolute. Additionally, positive correlation between genetic- and geographic distances showed that the vast size of the deep sea itself is a factor responsible for creating diversity. Article in Journal/Newspaper North Atlantic Southern Ocean Copepods Ghent University Academic Bibliography Southern Ocean Mid-Atlantic Ridge Deep Sea Research Part II: Topical Studies in Oceanography 148 74 90 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Earth and Environmental Sciences Isolation by distance Species range Dispersal Biogeography Peracarida Speciation Variance Population genetics VEMA FRACTURE-ZONE SOURCE-SINK HYPOTHESIS PUERTO-RICO TRENCH DEEP-SEA FAUNA SOUTHERN-OCEAN HARPACTICOID COPEPODS POPULATION-STRUCTURE MITOCHONDRIAL-DNA SPECIES-DIVERSITY BIOLOGICAL IDENTIFICATIONS |
spellingShingle |
Biology and Life Sciences Earth and Environmental Sciences Isolation by distance Species range Dispersal Biogeography Peracarida Speciation Variance Population genetics VEMA FRACTURE-ZONE SOURCE-SINK HYPOTHESIS PUERTO-RICO TRENCH DEEP-SEA FAUNA SOUTHERN-OCEAN HARPACTICOID COPEPODS POPULATION-STRUCTURE MITOCHONDRIAL-DNA SPECIES-DIVERSITY BIOLOGICAL IDENTIFICATIONS Riehl, Torben Lins Pereira, Lidia Brandt, Angelika The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) |
topic_facet |
Biology and Life Sciences Earth and Environmental Sciences Isolation by distance Species range Dispersal Biogeography Peracarida Speciation Variance Population genetics VEMA FRACTURE-ZONE SOURCE-SINK HYPOTHESIS PUERTO-RICO TRENCH DEEP-SEA FAUNA SOUTHERN-OCEAN HARPACTICOID COPEPODS POPULATION-STRUCTURE MITOCHONDRIAL-DNA SPECIES-DIVERSITY BIOLOGICAL IDENTIFICATIONS |
description |
The largest habitat on Earth, the abyssal oceans below 3500 m depth, is commonly assumed to represent a continuous environment due to homogeneity of environmental factors and the lack of physical barriers. Yet, the presence of bathymetric features, such as Mid-Ocean Ridges, and hadal trenches provide a discontinuation. During the Vema-TRANSIT expedition in 2014/2015 to the tropical North Atlantic, a transatlantic transect was studied following the full extent of the Vema Fracture Zone in an east-west direction and including the Puerto Rico Trench (PRT). The aim of this study was to test whether large bathymetric features represent barriers to dispersal and may lead to differentiation and eventually speciation. In this study, these potential barriers included the Mid-Atlantic Ridge (MAR) and the transition (similar to 3000 m) from the hadal PRT to the adjacent abyss. Genetic differentiation and differences in community structure (species composition) from east and west of the MAR, as well as abyssal and hadal depth zones were tested for using the poor dispersers Macrostylidae (Crustacea, Isopoda) as a model Distribution patterns showed that certain macrostylid species have ranges extending more than 2000 km, in some cases across oceanic ridges and trench-abyss transitions. Contrastingly, there was a clear signal for geographic population structure coinciding with the east-west division of the Atlantic by the MAR as well as with the abyss-hadal zonation. These results support the hypotheses that depth gradients as well as oceanic ridges reduce dispersal even though barriers may not be absolute. Additionally, positive correlation between genetic- and geographic distances showed that the vast size of the deep sea itself is a factor responsible for creating diversity. |
author2 |
Brandt, Angelika Kaiser, Stefanie Riehl, Torben |
format |
Article in Journal/Newspaper |
author |
Riehl, Torben Lins Pereira, Lidia Brandt, Angelika |
author_facet |
Riehl, Torben Lins Pereira, Lidia Brandt, Angelika |
author_sort |
Riehl, Torben |
title |
The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) |
title_short |
The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) |
title_full |
The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) |
title_fullStr |
The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) |
title_full_unstemmed |
The effects of depth, distance, and the Mid-Atlantic Ridge on genetic differentiation of abyssal and hadal isopods (Macrostylidae) |
title_sort |
effects of depth, distance, and the mid-atlantic ridge on genetic differentiation of abyssal and hadal isopods (macrostylidae) |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8560837 http://hdl.handle.net/1854/LU-8560837 https://doi.org/10.1016/j.dsr2.2017.10.005 https://biblio.ugent.be/publication/8560837/file/8609227 |
geographic |
Southern Ocean Mid-Atlantic Ridge |
geographic_facet |
Southern Ocean Mid-Atlantic Ridge |
genre |
North Atlantic Southern Ocean Copepods |
genre_facet |
North Atlantic Southern Ocean Copepods |
op_source |
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY ISSN: 0967-0645 |
op_relation |
https://biblio.ugent.be/publication/8560837 http://hdl.handle.net/1854/LU-8560837 http://dx.doi.org/10.1016/j.dsr2.2017.10.005 https://biblio.ugent.be/publication/8560837/file/8609227 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2017.10.005 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
148 |
container_start_page |
74 |
op_container_end_page |
90 |
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1768371399825555456 |