Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia)
The cold-water coral Lophelia pertusa is the most important reef-building coral species in the NE Atlantic Ocean. The reef framework creates a complex structural habitat that sustains high species diversity in the deep-sea. During the last decades, powered by improvements in deep-sea research equipm...
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ftunivgoeteborg:oai:gupea.ub.gu.se:2077/31819 2023-10-29T02:37:48+01:00 Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) Dahl, Mikael 2013-02-21 application/pdf http://hdl.handle.net/2077/31819 eng eng I. Dahl M.P., Pereyra R. T., Lundälv T., André C. (2012) Fine-scale spatial genetic structure and clonal distribution of the cold-water coral Lophelia pertusa. Coral Reefs, 31, 1135-1148.::doi::10.1007/s00338-012-0937-5 II. Dahl M.P., Pereyra R. T., Lundälv T., Järnegren J., Arnaud-Haond S., André C. (Manuscript) Genetic structure and the postglacial colonization process in the East Atlantic Ocean of the cold-water coral Lophelia pertusa. III. Flot J.-F., Dahl M.P., André C. (In review) Lophelia pertusa from the Ionian and Barents seas share identical nuclear ITS2 and near-identical mitochondrial genome sequences. BMC Research Notes. IV. Larsson A. I., Järnegren J., Strömberg S. S., Dahl M.P., Lundälv T., Brooke S. (Manuscript) Embryogenesis and larval biology of the cold-water coral Lophelia pertusa. V. Jonsson L.G*., Dahl M.P*., Strömberg S.S., Lindegarth M., André C., Lundälv T. (Manuscript) In situ measurement of survival and growth of genotyped transplanted fragments of the cold-water coral reef Lophelia pertusa. *equal contribution 91-89677-54-4 http://hdl.handle.net/2077/31819 Conservation genetics cold-water corals Text Doctoral thesis Doctor of Philosophy 2013 ftunivgoeteborg 2023-10-04T21:13:36Z The cold-water coral Lophelia pertusa is the most important reef-building coral species in the NE Atlantic Ocean. The reef framework creates a complex structural habitat that sustains high species diversity in the deep-sea. During the last decades, powered by improvements in deep-sea research equipment, it has become clear that threats imposed by anthropogenic activities have caused considerable destruction of these cold-water coral ecosystems. To assist cold-water coral management and conservation, this thesis aim to improve the understanding of L. pertusa biology, focusing on genetic population structure, larval development and restoration. First, we investigated the fine-scale genetic structure within and among reefs in the NE Skagerrak using microsatellite markers. Clonal reproduction was common resulting in an aggregated distribution of genotypes within reefs. There was a significant genetic differentiation among reef localities at spatial scales of tens of km (paper I). On the scale of the NE Atlantic genetic structure could be explained in terms of holocene range expansion (paper II). Finally, we compared the whole mitochondrial genomes of two geographically separated individuals (Norway and Italy, respectively) and found virtually no sequence differences (paper III). This result corroborates previous findings of low diversity in Anthozoa mitochondrial DNA, but is also in line with the hypothesis of long-range gene flow and a Mediterranean origin of L. pertusa populations on the Scandinavian continental margin. The larval stage is the only dispersal phase of corals and therefore tightly associated with connectivity among reefs. Using laboratory crossings and larval rearing we show for the first time that L. pertusa produce pelagic larvae that can live in the watercolumn for several weeks (paper IV). Bottom trawling has caused extensive destruction of cold-water coral habitats worldwide. In Sweden only one of six reefs is still alive, but the risk that this reef also will be lost is imminent. We tested the ... Doctoral or Postdoctoral Thesis Lophelia pertusa University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
institution |
Open Polar |
collection |
University of Gothenburg: GUPEA (Gothenburg University Publications Electronic Archive) |
op_collection_id |
ftunivgoeteborg |
language |
English |
topic |
Conservation genetics cold-water corals |
spellingShingle |
Conservation genetics cold-water corals Dahl, Mikael Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) |
topic_facet |
Conservation genetics cold-water corals |
description |
The cold-water coral Lophelia pertusa is the most important reef-building coral species in the NE Atlantic Ocean. The reef framework creates a complex structural habitat that sustains high species diversity in the deep-sea. During the last decades, powered by improvements in deep-sea research equipment, it has become clear that threats imposed by anthropogenic activities have caused considerable destruction of these cold-water coral ecosystems. To assist cold-water coral management and conservation, this thesis aim to improve the understanding of L. pertusa biology, focusing on genetic population structure, larval development and restoration. First, we investigated the fine-scale genetic structure within and among reefs in the NE Skagerrak using microsatellite markers. Clonal reproduction was common resulting in an aggregated distribution of genotypes within reefs. There was a significant genetic differentiation among reef localities at spatial scales of tens of km (paper I). On the scale of the NE Atlantic genetic structure could be explained in terms of holocene range expansion (paper II). Finally, we compared the whole mitochondrial genomes of two geographically separated individuals (Norway and Italy, respectively) and found virtually no sequence differences (paper III). This result corroborates previous findings of low diversity in Anthozoa mitochondrial DNA, but is also in line with the hypothesis of long-range gene flow and a Mediterranean origin of L. pertusa populations on the Scandinavian continental margin. The larval stage is the only dispersal phase of corals and therefore tightly associated with connectivity among reefs. Using laboratory crossings and larval rearing we show for the first time that L. pertusa produce pelagic larvae that can live in the watercolumn for several weeks (paper IV). Bottom trawling has caused extensive destruction of cold-water coral habitats worldwide. In Sweden only one of six reefs is still alive, but the risk that this reef also will be lost is imminent. We tested the ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Dahl, Mikael |
author_facet |
Dahl, Mikael |
author_sort |
Dahl, Mikael |
title |
Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) |
title_short |
Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) |
title_full |
Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) |
title_fullStr |
Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) |
title_full_unstemmed |
Conservation genetics of the cold-water coral Lophelia pertusa (Scleractinia) |
title_sort |
conservation genetics of the cold-water coral lophelia pertusa (scleractinia) |
publishDate |
2013 |
url |
http://hdl.handle.net/2077/31819 |
genre |
Lophelia pertusa |
genre_facet |
Lophelia pertusa |
op_relation |
I. Dahl M.P., Pereyra R. T., Lundälv T., André C. (2012) Fine-scale spatial genetic structure and clonal distribution of the cold-water coral Lophelia pertusa. Coral Reefs, 31, 1135-1148.::doi::10.1007/s00338-012-0937-5 II. Dahl M.P., Pereyra R. T., Lundälv T., Järnegren J., Arnaud-Haond S., André C. (Manuscript) Genetic structure and the postglacial colonization process in the East Atlantic Ocean of the cold-water coral Lophelia pertusa. III. Flot J.-F., Dahl M.P., André C. (In review) Lophelia pertusa from the Ionian and Barents seas share identical nuclear ITS2 and near-identical mitochondrial genome sequences. BMC Research Notes. IV. Larsson A. I., Järnegren J., Strömberg S. S., Dahl M.P., Lundälv T., Brooke S. (Manuscript) Embryogenesis and larval biology of the cold-water coral Lophelia pertusa. V. Jonsson L.G*., Dahl M.P*., Strömberg S.S., Lindegarth M., André C., Lundälv T. (Manuscript) In situ measurement of survival and growth of genotyped transplanted fragments of the cold-water coral reef Lophelia pertusa. *equal contribution 91-89677-54-4 http://hdl.handle.net/2077/31819 |
_version_ |
1781062909393108992 |