Contrasting chironomid assemblages in two high Arctic streams on Svalbard
Chironomid communities were investigated twice in summer 1997 in a glacier-fed (Bayelva) and a non-glacial stream (Londonelva), fed by snowmelt and rainfall near Ny-Ålesund (Svalbard Archipelago, 78°N). Environmental conditions (discharge, water temperature, suspended sediment) were harsher for the...
Published in: | Fundamental and Applied Limnology |
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Online Access: | http://hdl.handle.net/2434/58043 https://doi.org/10.1127/1863-9135/2007/0170-0211 |
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ftunivmilanoair:oai:air.unimi.it:2434/58043 2024-01-21T10:03:15+01:00 Contrasting chironomid assemblages in two high Arctic streams on Svalbard B. Lods Crozet V. Lencioni J. Brittain L. Marziali B. Rossaro B. Lods-Crozet V. Lencioni J. Brittain L. Marziali B. Rossaro 2007 http://hdl.handle.net/2434/58043 https://doi.org/10.1127/1863-9135/2007/0170-0211 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000251958200003 volume:170 issue:3 firstpage:211 lastpage:222 journal:FUNDAMENTAL AND APPLIED LIMNOLOGY http://hdl.handle.net/2434/58043 doi:10.1127/1863-9135/2007/0170-0211 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-38049161668 proglacial stream high arctic Chironomidae Oligochaeta Spitzbergen water temperature Settore BIO/05 - Zoologia Settore BIO/07 - Ecologia info:eu-repo/semantics/article 2007 ftunivmilanoair https://doi.org/10.1127/1863-9135/2007/0170-0211 2023-12-26T23:18:08Z Chironomid communities were investigated twice in summer 1997 in a glacier-fed (Bayelva) and a non-glacial stream (Londonelva), fed by snowmelt and rainfall near Ny-Ålesund (Svalbard Archipelago, 78°N). Environmental conditions (discharge, water temperature, suspended sediment) were harsher for the fauna in the glacial system than in the non-glacial one. In all, 29 chironomid species were identified from larval, pupal and male adult material, including six species new to Svalbard. Diamesa was the best represented genus, showing contrasting distributional trends at the species level in the two streams: Diamesa aberrata and D. bohemani were more characteristic of the glacial stream, while D. arctica and D. bertrami colonised primarily the snowmelt-fed one. Total abundance of chironomid larvae was ten times greater in Londonelva than in Bayelva. The prevailing harsh conditions in glacial streams, such as high and fluctuating discharge, high sediment transport and substrate instability, strongly influenced the abundance of the chironomid fauna, demonstrating the key importance of water source in Arctic streams. Article in Journal/Newspaper Arctic glacier Ny Ålesund Ny-Ålesund Spitzbergen Svalbard The University of Milan: Archivio Istituzionale della Ricerca (AIR) Arctic Svalbard Ny-Ålesund Svalbard Archipelago Bayelva ENVELOPE(11.898,11.898,78.933,78.933) Fundamental and Applied Limnology 170 3 211 222 |
institution |
Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
proglacial stream high arctic Chironomidae Oligochaeta Spitzbergen water temperature Settore BIO/05 - Zoologia Settore BIO/07 - Ecologia |
spellingShingle |
proglacial stream high arctic Chironomidae Oligochaeta Spitzbergen water temperature Settore BIO/05 - Zoologia Settore BIO/07 - Ecologia B. Lods Crozet V. Lencioni J. Brittain L. Marziali B. Rossaro Contrasting chironomid assemblages in two high Arctic streams on Svalbard |
topic_facet |
proglacial stream high arctic Chironomidae Oligochaeta Spitzbergen water temperature Settore BIO/05 - Zoologia Settore BIO/07 - Ecologia |
description |
Chironomid communities were investigated twice in summer 1997 in a glacier-fed (Bayelva) and a non-glacial stream (Londonelva), fed by snowmelt and rainfall near Ny-Ålesund (Svalbard Archipelago, 78°N). Environmental conditions (discharge, water temperature, suspended sediment) were harsher for the fauna in the glacial system than in the non-glacial one. In all, 29 chironomid species were identified from larval, pupal and male adult material, including six species new to Svalbard. Diamesa was the best represented genus, showing contrasting distributional trends at the species level in the two streams: Diamesa aberrata and D. bohemani were more characteristic of the glacial stream, while D. arctica and D. bertrami colonised primarily the snowmelt-fed one. Total abundance of chironomid larvae was ten times greater in Londonelva than in Bayelva. The prevailing harsh conditions in glacial streams, such as high and fluctuating discharge, high sediment transport and substrate instability, strongly influenced the abundance of the chironomid fauna, demonstrating the key importance of water source in Arctic streams. |
author2 |
B. Lods-Crozet V. Lencioni J. Brittain L. Marziali B. Rossaro |
format |
Article in Journal/Newspaper |
author |
B. Lods Crozet V. Lencioni J. Brittain L. Marziali B. Rossaro |
author_facet |
B. Lods Crozet V. Lencioni J. Brittain L. Marziali B. Rossaro |
author_sort |
B. Lods Crozet |
title |
Contrasting chironomid assemblages in two high Arctic streams on Svalbard |
title_short |
Contrasting chironomid assemblages in two high Arctic streams on Svalbard |
title_full |
Contrasting chironomid assemblages in two high Arctic streams on Svalbard |
title_fullStr |
Contrasting chironomid assemblages in two high Arctic streams on Svalbard |
title_full_unstemmed |
Contrasting chironomid assemblages in two high Arctic streams on Svalbard |
title_sort |
contrasting chironomid assemblages in two high arctic streams on svalbard |
publishDate |
2007 |
url |
http://hdl.handle.net/2434/58043 https://doi.org/10.1127/1863-9135/2007/0170-0211 |
long_lat |
ENVELOPE(11.898,11.898,78.933,78.933) |
geographic |
Arctic Svalbard Ny-Ålesund Svalbard Archipelago Bayelva |
geographic_facet |
Arctic Svalbard Ny-Ålesund Svalbard Archipelago Bayelva |
genre |
Arctic glacier Ny Ålesund Ny-Ålesund Spitzbergen Svalbard |
genre_facet |
Arctic glacier Ny Ålesund Ny-Ålesund Spitzbergen Svalbard |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000251958200003 volume:170 issue:3 firstpage:211 lastpage:222 journal:FUNDAMENTAL AND APPLIED LIMNOLOGY http://hdl.handle.net/2434/58043 doi:10.1127/1863-9135/2007/0170-0211 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-38049161668 |
op_doi |
https://doi.org/10.1127/1863-9135/2007/0170-0211 |
container_title |
Fundamental and Applied Limnology |
container_volume |
170 |
container_issue |
3 |
container_start_page |
211 |
op_container_end_page |
222 |
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1788693515121721344 |