Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish
The rare and acidification-tolerant Coenagrion lunulatum became extinct in Romundstadtjern, a small acidic lake in southern Norway, at some time between 1950 and 1980. The reason was suspected to be liming of the lake to raise the pH level before releasing fish (trout). To substantiate the hypothesi...
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Online Access: | http://hdl.handle.net/11250/2590728 https://doi.org/10.5281/zenodo.1239949 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2590728 2023-05-15T15:55:46+02:00 Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish. Dolmen, Dag Pedersen, Jonny 2018 http://hdl.handle.net/11250/2590728 https://doi.org/10.5281/zenodo.1239949 eng eng Osmylus Scientific Publishers Odonatologica. 2018, 47 100-120. urn:issn:0375-0183 http://hdl.handle.net/11250/2590728 https://doi.org/10.5281/zenodo.1239949 cristin:1635197 100-120 47 Odonatologica Journal article Peer reviewed 2018 ftntnutrondheimi https://doi.org/10.5281/zenodo.1239949 2019-09-17T06:54:32Z The rare and acidification-tolerant Coenagrion lunulatum became extinct in Romundstadtjern, a small acidic lake in southern Norway, at some time between 1950 and 1980. The reason was suspected to be liming of the lake to raise the pH level before releasing fish (trout). To substantiate the hypothesis, in 1998–2001 we experimentally limed two other small acidic lakes, Øynaheia A (pH 4.6) and B (pH 4.8), which were also inhabited by C. lunulatum. Instead of being made extinct by the liming and the rise of the pH to 7.0, the C. lunulatum population at Øynaheia grew strongly during the experimental period. However, when fish (perch) were released later, before 2011, the invertebrate fauna became tremendously impoverished, and C. lunulatum was not observed there in 2012, 2014 or 2016. Therefore, liming of lakes does not seem to be a threat to C. lunulatum, but the release of fish may probably lead to its extinction. A coexisting population of C. hastulatum also grew during the years of liming, but not as much as C. lunulatum. However, it survived the introduction of fish, although in low numbers. publishedVersion Published by: Osmylus Scientific Publishers Article in Journal/Newspaper Coenagrion lunulatum NTNU Open Archive (Norwegian University of Science and Technology) Norway |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
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ftntnutrondheimi |
language |
English |
description |
The rare and acidification-tolerant Coenagrion lunulatum became extinct in Romundstadtjern, a small acidic lake in southern Norway, at some time between 1950 and 1980. The reason was suspected to be liming of the lake to raise the pH level before releasing fish (trout). To substantiate the hypothesis, in 1998–2001 we experimentally limed two other small acidic lakes, Øynaheia A (pH 4.6) and B (pH 4.8), which were also inhabited by C. lunulatum. Instead of being made extinct by the liming and the rise of the pH to 7.0, the C. lunulatum population at Øynaheia grew strongly during the experimental period. However, when fish (perch) were released later, before 2011, the invertebrate fauna became tremendously impoverished, and C. lunulatum was not observed there in 2012, 2014 or 2016. Therefore, liming of lakes does not seem to be a threat to C. lunulatum, but the release of fish may probably lead to its extinction. A coexisting population of C. hastulatum also grew during the years of liming, but not as much as C. lunulatum. However, it survived the introduction of fish, although in low numbers. publishedVersion Published by: Osmylus Scientific Publishers |
format |
Article in Journal/Newspaper |
author |
Dolmen, Dag Pedersen, Jonny |
spellingShingle |
Dolmen, Dag Pedersen, Jonny Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish |
author_facet |
Dolmen, Dag Pedersen, Jonny |
author_sort |
Dolmen, Dag |
title |
Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish |
title_short |
Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish |
title_full |
Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish |
title_fullStr |
Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish |
title_full_unstemmed |
Coenagrion hastulatum and C. lunulatum – their responses to the liming of acidified lakes and the release of fish |
title_sort |
coenagrion hastulatum and c. lunulatum – their responses to the liming of acidified lakes and the release of fish |
publisher |
Osmylus Scientific Publishers |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2590728 https://doi.org/10.5281/zenodo.1239949 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Coenagrion lunulatum |
genre_facet |
Coenagrion lunulatum |
op_source |
100-120 47 Odonatologica |
op_relation |
Odonatologica. 2018, 47 100-120. urn:issn:0375-0183 http://hdl.handle.net/11250/2590728 https://doi.org/10.5281/zenodo.1239949 cristin:1635197 |
op_doi |
https://doi.org/10.5281/zenodo.1239949 |
_version_ |
1766391269027741696 |