Soft-bottom communities in Balsfjord. Stable over time of under change?
The soft-bottom macrofauna (>1 mm) was investigated at three different locations in Balsfjord; Andersdal, Svartnes and Tennes. The Svartnes data was then merged with Eivind Ougs long-term series from 1977-1994. The data showed that there were large variation between the three different stations i...
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UiT Norges arktiske universitet
2015
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Online Access: | https://hdl.handle.net/10037/9142 |
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ftunivtroemsoe:oai:munin.uit.no:10037/9142 2023-05-15T15:37:25+02:00 Soft-bottom communities in Balsfjord. Stable over time of under change? Henriksen, Nina Elisabeth 2015-12-15 https://hdl.handle.net/10037/9142 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/9142 URN:NBN:no-uit_munin_8727 openAccess Copyright 2015 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 BIO-3950 Master thesis Mastergradsoppgave 2015 ftunivtroemsoe 2021-06-25T17:54:42Z The soft-bottom macrofauna (>1 mm) was investigated at three different locations in Balsfjord; Andersdal, Svartnes and Tennes. The Svartnes data was then merged with Eivind Ougs long-term series from 1977-1994. The data showed that there were large variation between the three different stations in number of taxa and individuals found. A total of 59 taxa and 1514 (0.7 m2) individuals were found. The polychaeta Maldane sarsi and Galathowenia oculata were the dominate taxa at all three stations in number of individuals but the echinoderm Ctenodiscus cripatus dominated in biomass at Andersdal and Tennes. Andersdal was found to have the most number of taxa and individuals. Svartnes was the most divers with Shannon-Wiener index of 2.54 followed by Tennes with 1.99 and Andersdal with 1.69. The long-term study showed that species assemblage had changed little, but that the number of individuals had decreased from 1994 to 2013. Tubificoides cruspisetosus that was found in large numbers in 1994, was found in only one of the grab samples at Svartnes, represented by only one individual. Long-term monitoring in Balsfjord is now more important than ever since 3 small red king crab Paralithodes camtschaticus was captured in October 2014 at Tennes, especially considering the potential effect this invasive species has on the ecosystem. Master Thesis Balsfjord Paralithodes camtschaticus Red king crab University of Tromsø: Munin Open Research Archive Balsfjord ENVELOPE(19.227,19.227,69.240,69.240) Tennes ENVELOPE(18.833,18.833,69.667,69.667) Andersdal ENVELOPE(18.214,18.214,69.266,69.266) |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 BIO-3950 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 BIO-3950 Henriksen, Nina Elisabeth Soft-bottom communities in Balsfjord. Stable over time of under change? |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 BIO-3950 |
description |
The soft-bottom macrofauna (>1 mm) was investigated at three different locations in Balsfjord; Andersdal, Svartnes and Tennes. The Svartnes data was then merged with Eivind Ougs long-term series from 1977-1994. The data showed that there were large variation between the three different stations in number of taxa and individuals found. A total of 59 taxa and 1514 (0.7 m2) individuals were found. The polychaeta Maldane sarsi and Galathowenia oculata were the dominate taxa at all three stations in number of individuals but the echinoderm Ctenodiscus cripatus dominated in biomass at Andersdal and Tennes. Andersdal was found to have the most number of taxa and individuals. Svartnes was the most divers with Shannon-Wiener index of 2.54 followed by Tennes with 1.99 and Andersdal with 1.69. The long-term study showed that species assemblage had changed little, but that the number of individuals had decreased from 1994 to 2013. Tubificoides cruspisetosus that was found in large numbers in 1994, was found in only one of the grab samples at Svartnes, represented by only one individual. Long-term monitoring in Balsfjord is now more important than ever since 3 small red king crab Paralithodes camtschaticus was captured in October 2014 at Tennes, especially considering the potential effect this invasive species has on the ecosystem. |
format |
Master Thesis |
author |
Henriksen, Nina Elisabeth |
author_facet |
Henriksen, Nina Elisabeth |
author_sort |
Henriksen, Nina Elisabeth |
title |
Soft-bottom communities in Balsfjord. Stable over time of under change? |
title_short |
Soft-bottom communities in Balsfjord. Stable over time of under change? |
title_full |
Soft-bottom communities in Balsfjord. Stable over time of under change? |
title_fullStr |
Soft-bottom communities in Balsfjord. Stable over time of under change? |
title_full_unstemmed |
Soft-bottom communities in Balsfjord. Stable over time of under change? |
title_sort |
soft-bottom communities in balsfjord. stable over time of under change? |
publisher |
UiT Norges arktiske universitet |
publishDate |
2015 |
url |
https://hdl.handle.net/10037/9142 |
long_lat |
ENVELOPE(19.227,19.227,69.240,69.240) ENVELOPE(18.833,18.833,69.667,69.667) ENVELOPE(18.214,18.214,69.266,69.266) |
geographic |
Balsfjord Tennes Andersdal |
geographic_facet |
Balsfjord Tennes Andersdal |
genre |
Balsfjord Paralithodes camtschaticus Red king crab |
genre_facet |
Balsfjord Paralithodes camtschaticus Red king crab |
op_relation |
https://hdl.handle.net/10037/9142 URN:NBN:no-uit_munin_8727 |
op_rights |
openAccess Copyright 2015 The Author(s) |
_version_ |
1766367980886687744 |