Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak
Skagerrak has been subject to several anthropogenic influences over the past decades, with climate change and eutrophication being considered as the most serious and large-scale disturbance factors. The present study reports monitoring data from six soft bottom stations in 50–380 m depth at the Norw...
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Online Access: | http://hdl.handle.net/11250/2611650 https://doi.org/10.1016/j.seares.2018.08.007 |
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ftimr:oai:imr.brage.unit.no:11250/2611650 2023-05-15T17:34:05+02:00 Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak Trannum, Hilde Cecilie Gundersen, Hege Oug, Eivind Rygg, Brage Norderhaug, Kjell Magnus 2018 application/pdf http://hdl.handle.net/11250/2611650 https://doi.org/10.1016/j.seares.2018.08.007 eng eng Norges forskningsråd: 160016 Journal of Sea Research. 2018, 141 83-98. urn:issn:1385-1101 http://hdl.handle.net/11250/2611650 https://doi.org/10.1016/j.seares.2018.08.007 cristin:1620646 83-98 141 Journal of Sea Research Journal article Peer reviewed 2018 ftimr https://doi.org/10.1016/j.seares.2018.08.007 2021-09-23T20:15:15Z Skagerrak has been subject to several anthropogenic influences over the past decades, with climate change and eutrophication being considered as the most serious and large-scale disturbance factors. The present study reports monitoring data from six soft bottom stations in 50–380 m depth at the Norwegian Skagerrak coast aimed at investigating to which degree changes in environmental conditions have affected species communities and diversity. Sampling was carried out yearly in the period 1990–2010. Links between benthic community patterns and climate factors and physicochemical variables from the water mases were examined using uni- and multivariate statistical methods. Throughout the period species richness gradually increased. Although all stations showed distinct species assemblages, the community composition gradually changed towards increased importance of sensitive small molluscs and tube-building annelids concurrent with a general temperature increase and reduction of nutrients in the water masses. The trend was largely similar over the stations, indicating that large-scale changes in the Skagerrak water masses were driving factors compared to possible influences from local sources. The faunal changes during the study period thus indicate an improved status of the soft bottom benthos, which possibly could be related to a reduction in the eutrophication. On a shorter scale, species richness was found to vary in relation to North Atlantic Oscillation (NAO) Index in the previous year (decline), nutrient concentrations in spring (decline), and winter water temperature (incline). acceptedVersion Article in Journal/Newspaper North Atlantic North Atlantic oscillation Institute for Marine Research: Brage IMR Journal of Sea Research 141 83 98 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Skagerrak has been subject to several anthropogenic influences over the past decades, with climate change and eutrophication being considered as the most serious and large-scale disturbance factors. The present study reports monitoring data from six soft bottom stations in 50–380 m depth at the Norwegian Skagerrak coast aimed at investigating to which degree changes in environmental conditions have affected species communities and diversity. Sampling was carried out yearly in the period 1990–2010. Links between benthic community patterns and climate factors and physicochemical variables from the water mases were examined using uni- and multivariate statistical methods. Throughout the period species richness gradually increased. Although all stations showed distinct species assemblages, the community composition gradually changed towards increased importance of sensitive small molluscs and tube-building annelids concurrent with a general temperature increase and reduction of nutrients in the water masses. The trend was largely similar over the stations, indicating that large-scale changes in the Skagerrak water masses were driving factors compared to possible influences from local sources. The faunal changes during the study period thus indicate an improved status of the soft bottom benthos, which possibly could be related to a reduction in the eutrophication. On a shorter scale, species richness was found to vary in relation to North Atlantic Oscillation (NAO) Index in the previous year (decline), nutrient concentrations in spring (decline), and winter water temperature (incline). acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Trannum, Hilde Cecilie Gundersen, Hege Oug, Eivind Rygg, Brage Norderhaug, Kjell Magnus |
spellingShingle |
Trannum, Hilde Cecilie Gundersen, Hege Oug, Eivind Rygg, Brage Norderhaug, Kjell Magnus Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak |
author_facet |
Trannum, Hilde Cecilie Gundersen, Hege Oug, Eivind Rygg, Brage Norderhaug, Kjell Magnus |
author_sort |
Trannum, Hilde Cecilie |
title |
Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak |
title_short |
Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak |
title_full |
Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak |
title_fullStr |
Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak |
title_full_unstemmed |
Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak |
title_sort |
soft bottom benthos and responses to climate variation and eutrophication in skagerrak |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2611650 https://doi.org/10.1016/j.seares.2018.08.007 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
83-98 141 Journal of Sea Research |
op_relation |
Norges forskningsråd: 160016 Journal of Sea Research. 2018, 141 83-98. urn:issn:1385-1101 http://hdl.handle.net/11250/2611650 https://doi.org/10.1016/j.seares.2018.08.007 cristin:1620646 |
op_doi |
https://doi.org/10.1016/j.seares.2018.08.007 |
container_title |
Journal of Sea Research |
container_volume |
141 |
container_start_page |
83 |
op_container_end_page |
98 |
_version_ |
1766132792896258048 |