Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea?
The snow crab, Chionoecete opilio, is an invasive species in the Barents Sea. The spread of the species has know environmental impacts on the benthic community, removing species important for biominxing. By analyzing short sediment cores (10 cm) from locations with high density of snow crabs and low...
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ftoslouniv:oai:www.duo.uio.no:10852/89245 2023-05-15T15:38:23+02:00 Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? Sjøblom, Marie Amalie Nordqvist 2021 http://hdl.handle.net/10852/89245 http://urn.nb.no/URN:NBN:no-91851 eng eng http://urn.nb.no/URN:NBN:no-91851 Sjøblom, Marie Amalie Nordqvist. Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea?. Master thesis, University of Oslo, 2021 http://hdl.handle.net/10852/89245 URN:NBN:no-91851 Fulltext https://www.duo.uio.no/bitstream/handle/10852/89245/1/mariesjoblom_masterthesis.pdf Master thesis Masteroppgave 2021 ftoslouniv 2021-11-24T23:32:27Z The snow crab, Chionoecete opilio, is an invasive species in the Barents Sea. The spread of the species has know environmental impacts on the benthic community, removing species important for biominxing. By analyzing short sediment cores (10 cm) from locations with high density of snow crabs and low densities of snow crabs it is clear that the snow crab effects the benthic community. Both macrofauna and benthic foraminifera indicates sediment mixing in the areas with high crab densities. Foraminifera are single celled organisms found in all marine environments, and the main difference in microhabitat characteristic is between the epifaunal and infaunal benthic organisms. The main factors determining the vertical distribution of foraminifera are oxygen concentration and food availability. Sediment analysis of total organic carbon, water content and sediment size support the evidence of sediment mixing and livable conditions downcore, as the different parameters can be correlated. Master Thesis Barents Sea Snow crab Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Barents Sea |
institution |
Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
The snow crab, Chionoecete opilio, is an invasive species in the Barents Sea. The spread of the species has know environmental impacts on the benthic community, removing species important for biominxing. By analyzing short sediment cores (10 cm) from locations with high density of snow crabs and low densities of snow crabs it is clear that the snow crab effects the benthic community. Both macrofauna and benthic foraminifera indicates sediment mixing in the areas with high crab densities. Foraminifera are single celled organisms found in all marine environments, and the main difference in microhabitat characteristic is between the epifaunal and infaunal benthic organisms. The main factors determining the vertical distribution of foraminifera are oxygen concentration and food availability. Sediment analysis of total organic carbon, water content and sediment size support the evidence of sediment mixing and livable conditions downcore, as the different parameters can be correlated. |
format |
Master Thesis |
author |
Sjøblom, Marie Amalie Nordqvist |
spellingShingle |
Sjøblom, Marie Amalie Nordqvist Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? |
author_facet |
Sjøblom, Marie Amalie Nordqvist |
author_sort |
Sjøblom, Marie Amalie Nordqvist |
title |
Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? |
title_short |
Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? |
title_full |
Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? |
title_fullStr |
Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? |
title_full_unstemmed |
Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea? |
title_sort |
environmental changes in the barents sea – does the invasive snow crab disturb the sediment and geochemical composition in the barents sea? |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/89245 http://urn.nb.no/URN:NBN:no-91851 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Snow crab |
genre_facet |
Barents Sea Snow crab |
op_relation |
http://urn.nb.no/URN:NBN:no-91851 Sjøblom, Marie Amalie Nordqvist. Environmental changes in the Barents Sea – Does the invasive snow crab disturb the sediment and geochemical composition in the Barents Sea?. Master thesis, University of Oslo, 2021 http://hdl.handle.net/10852/89245 URN:NBN:no-91851 Fulltext https://www.duo.uio.no/bitstream/handle/10852/89245/1/mariesjoblom_masterthesis.pdf |
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1766369283850371072 |