Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas
The enigmatic fauna of chemosynthesis-based ecosystems (CBEs), i.e. hydrothermal vents, cold seeps and organic falls, has been the subject of intensive research over the last decades. However, there are still many aspects of these ecosystems that are poorly understood. There are many shared families...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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The University of Bergen
2018
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Online Access: | https://hdl.handle.net/1956/17715 |
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ftunivbergen:oai:bora.uib.no:1956/17715 |
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institution |
Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The enigmatic fauna of chemosynthesis-based ecosystems (CBEs), i.e. hydrothermal vents, cold seeps and organic falls, has been the subject of intensive research over the last decades. However, there are still many aspects of these ecosystems that are poorly understood. There are many shared families and genera of animals between the different types of CBEs, which shows that there is an evolutionary link between them, but the prevalence of shared species and present-day connectivity between different CBEs is debated. The existence of “intermediate” habitats such as sedimented hydrothermal vents and hydrothermal seeps, led to the suggestion that CBEs should be considered a continuum of reducing conditions, rather than completely distinct phenomena. However, it is not clear which environmental factors are most important in structuring the fauna of CBEs, or what determines the habitat specificity of taxa. Evolutionary studies of CBE-adapted taxa often show a gradual adaptation to more extreme environments, with organic falls or cold seeps serving as evolutionary stepping-stones into the hydrothermal vent habitat. Most of these studies, however, have been focused on symbiotrophic taxa, and the evolutionary role of intermediate habitats has not been assessed in a phylogenetic context. Sampling of CBEs is still patchy and biased, both in terms of geographic regions and habitats, which hampers our understanding of biogeographic patterns. The main objective of this project was to contribute to filling these knowledge gaps by focusing on the annelid fauna of CBEs on the Arctic Mid-Ocean Ridge and in the Nordic Seas. The target taxa were worms in the family Ampharetidae, which are commonly found in all types of CBEs around the world, and Sclerolinum contortum and Nicomache lokii, which are abundant habitat-builders in Arctic CBEs. The project aimed to: 1 – describe the new species of Ampharetidae from Loki’s Castle Vent Field (LCVF), 2 – reconstruct the evolutionary history of Ampharetidae, 3 – assess the relationship ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Eilertsen, Mari Heggernes |
spellingShingle |
Eilertsen, Mari Heggernes Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas |
author_facet |
Eilertsen, Mari Heggernes |
author_sort |
Eilertsen, Mari Heggernes |
title |
Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas |
title_short |
Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas |
title_full |
Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas |
title_fullStr |
Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas |
title_full_unstemmed |
Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas |
title_sort |
evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the arctic mid-ocean ridge and the nordic seas |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/17715 |
long_lat |
ENVELOPE(-63.992,-63.992,-64.786,-64.786) |
geographic |
Arctic Stepping Stones |
geographic_facet |
Arctic Stepping Stones |
genre |
Arctic Arctic Nordic Seas Stepping Stones |
genre_facet |
Arctic Arctic Nordic Seas Stepping Stones |
op_relation |
Paper I: Kongsrud, J.A., Eilertsen, M.H., Alvestad, T., Kongshavn, K. & Rapp, H.T. (2017) New species of Ampharetidae (Annelida: Polychaeta) from the Arctic Loki Castle vent field. Deep Sea Research Part II Topical Studies in Oceanography, 137: 232-245. The article is available at: http://hdl.handle.net/1956/16250 Paper II: Eilertsen, M.H., Kongsrud, J.A., Alvestad, T., Stiller, J., Rouse, G.W., Rapp, H.T. (2017) Do ampharetids take sedimented steps between vents and seeps? Phylogeny and habitat-use of Ampharetidae (Annelida, Terebelliformia) in chemosynthesis-based ecosystems. BMC Evolutionary Biology, 17: 222. The article is available at: http://hdl.handle.net/1956/17387 Paper III: Georgieva, M. N., Wiklund, H., Bell, J. B., Eilertsen, M. H., Mills, R. A., Little, C. T. S., & Glover, A. G. (2015). A chemosynthetic weed: the tubeworm Sclerolinum contortum is a bipolar, cosmopolitan species. BMC Evolutionary Biology, 15: 1-17. The article is available at: http://hdl.handle.net/1956/12183 Paper IV: Eilertsen, M.H., Georgieva, M.N., Kongsrud, J.A., Wiklund, H., Glover, A.G. Rapp, H.T. (2018) Genetic connectivity from the Arctic to the Antarctic: Sclerolinum contortum and Nicomache lokii (Annelida) are both widespread in reducing environments. Scientific Reports, 8: 4810. The article is available at: http://hdl.handle.net/1956/17714 https://hdl.handle.net/1956/17715 cristin:1571421 |
op_rights |
Copyright the author. All rights reserved |
_version_ |
1766302026791124992 |
spelling |
ftunivbergen:oai:bora.uib.no:1956/17715 2023-05-15T14:27:56+02:00 Evolutionary history, connectivity and habitat-use of annelids from deep-sea chemosynthesis-based ecosystems, with an emphasis on the Arctic mid-Ocean Ridge and the Nordic Seas Eilertsen, Mari Heggernes 2018-03-16 application/pdf https://hdl.handle.net/1956/17715 eng eng The University of Bergen Paper I: Kongsrud, J.A., Eilertsen, M.H., Alvestad, T., Kongshavn, K. & Rapp, H.T. (2017) New species of Ampharetidae (Annelida: Polychaeta) from the Arctic Loki Castle vent field. Deep Sea Research Part II Topical Studies in Oceanography, 137: 232-245. The article is available at: http://hdl.handle.net/1956/16250 Paper II: Eilertsen, M.H., Kongsrud, J.A., Alvestad, T., Stiller, J., Rouse, G.W., Rapp, H.T. (2017) Do ampharetids take sedimented steps between vents and seeps? Phylogeny and habitat-use of Ampharetidae (Annelida, Terebelliformia) in chemosynthesis-based ecosystems. BMC Evolutionary Biology, 17: 222. The article is available at: http://hdl.handle.net/1956/17387 Paper III: Georgieva, M. N., Wiklund, H., Bell, J. B., Eilertsen, M. H., Mills, R. A., Little, C. T. S., & Glover, A. G. (2015). A chemosynthetic weed: the tubeworm Sclerolinum contortum is a bipolar, cosmopolitan species. BMC Evolutionary Biology, 15: 1-17. The article is available at: http://hdl.handle.net/1956/12183 Paper IV: Eilertsen, M.H., Georgieva, M.N., Kongsrud, J.A., Wiklund, H., Glover, A.G. Rapp, H.T. (2018) Genetic connectivity from the Arctic to the Antarctic: Sclerolinum contortum and Nicomache lokii (Annelida) are both widespread in reducing environments. Scientific Reports, 8: 4810. The article is available at: http://hdl.handle.net/1956/17714 https://hdl.handle.net/1956/17715 cristin:1571421 Copyright the author. All rights reserved Doctoral thesis 2018 ftunivbergen 2023-03-14T17:45:00Z The enigmatic fauna of chemosynthesis-based ecosystems (CBEs), i.e. hydrothermal vents, cold seeps and organic falls, has been the subject of intensive research over the last decades. However, there are still many aspects of these ecosystems that are poorly understood. There are many shared families and genera of animals between the different types of CBEs, which shows that there is an evolutionary link between them, but the prevalence of shared species and present-day connectivity between different CBEs is debated. The existence of “intermediate” habitats such as sedimented hydrothermal vents and hydrothermal seeps, led to the suggestion that CBEs should be considered a continuum of reducing conditions, rather than completely distinct phenomena. However, it is not clear which environmental factors are most important in structuring the fauna of CBEs, or what determines the habitat specificity of taxa. Evolutionary studies of CBE-adapted taxa often show a gradual adaptation to more extreme environments, with organic falls or cold seeps serving as evolutionary stepping-stones into the hydrothermal vent habitat. Most of these studies, however, have been focused on symbiotrophic taxa, and the evolutionary role of intermediate habitats has not been assessed in a phylogenetic context. Sampling of CBEs is still patchy and biased, both in terms of geographic regions and habitats, which hampers our understanding of biogeographic patterns. The main objective of this project was to contribute to filling these knowledge gaps by focusing on the annelid fauna of CBEs on the Arctic Mid-Ocean Ridge and in the Nordic Seas. The target taxa were worms in the family Ampharetidae, which are commonly found in all types of CBEs around the world, and Sclerolinum contortum and Nicomache lokii, which are abundant habitat-builders in Arctic CBEs. The project aimed to: 1 – describe the new species of Ampharetidae from Loki’s Castle Vent Field (LCVF), 2 – reconstruct the evolutionary history of Ampharetidae, 3 – assess the relationship ... Doctoral or Postdoctoral Thesis Arctic Arctic Nordic Seas Stepping Stones University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Stepping Stones ENVELOPE(-63.992,-63.992,-64.786,-64.786) |