Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics
Under fundamental ecosystem changes in high latitude lakes, a functional paleolimnological approach may increase holistic understanding of lake responses and resilience to climate warming. A ~2000-year sediment record from Lake Loažžejávri in the tundra of northern Finnish Lapland was examined for f...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/305963 2023-05-15T18:40:12+02:00 Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics Nevalainen, Liisa Kivilä, E. Henriikka Rantala, Marttiina V. Luoto, Tomi P. 2019-09-27 http://hdl.handle.net/10138/305963 eng eng Multidisciplinary Digital Publishing Institute Nevalainen, L.; Kivilä, E.H.; Rantala, M.V.; Luoto, T.P. Cladoceran (Crustacea) Niches, Sex, and Sun Bathing—A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics. Water 2019, 11, 2008. http://hdl.handle.net/10138/305963 http://purl.org/eprint/entityType/JournalArticle http://purl.org/eprint/entityType/Expression 2019 ftunivhelsihelda 2022-11-02T23:58:03Z Under fundamental ecosystem changes in high latitude lakes, a functional paleolimnological approach may increase holistic understanding of lake responses and resilience to climate warming. A ~2000-year sediment record from Lake Loažžejávri in the tundra of northern Finnish Lapland was examined for fossil Cladocera assemblages to examine long-term environmental controls on aquatic communities. In addition, cladoceran functional attributes, including functional diversity (FD), UV absorbance (ABS UV ) of Alona carapaces, and sexual reproduction (ephippia) in Bosmina and Chydoridae were analyzed. Cladoceran communities responded to a major change in benthic habitat quality, reflected as elevated (increasingly benthic) sediment organic matter δ 13 C signal since the 17th century. FD fluctuations showed association with climate oscillation, FD being generally higher during warm climate periods. These ecological changes were likely attributable to diversification of littoral-benthic consumer habitat space. ABS UV , irrespective of increases during the Little Ice Age (LIA) due to higher UV transparency of lake water, was lower under increasing autochthony (benthic production) suggesting establishment of physical UV refugia by the benthic vegetative substrata. Bosmina ephippia exhibited a decreasing trend associated with increasing benthic production, indicating favorable environmental regime, and, together with chydorid ephippia, transient increases during the climate cooling of the LIA driven by shorter open-water season. Other/Unknown Material Tundra Lapland Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
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Open Polar |
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Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
description |
Under fundamental ecosystem changes in high latitude lakes, a functional paleolimnological approach may increase holistic understanding of lake responses and resilience to climate warming. A ~2000-year sediment record from Lake Loažžejávri in the tundra of northern Finnish Lapland was examined for fossil Cladocera assemblages to examine long-term environmental controls on aquatic communities. In addition, cladoceran functional attributes, including functional diversity (FD), UV absorbance (ABS UV ) of Alona carapaces, and sexual reproduction (ephippia) in Bosmina and Chydoridae were analyzed. Cladoceran communities responded to a major change in benthic habitat quality, reflected as elevated (increasingly benthic) sediment organic matter δ 13 C signal since the 17th century. FD fluctuations showed association with climate oscillation, FD being generally higher during warm climate periods. These ecological changes were likely attributable to diversification of littoral-benthic consumer habitat space. ABS UV , irrespective of increases during the Little Ice Age (LIA) due to higher UV transparency of lake water, was lower under increasing autochthony (benthic production) suggesting establishment of physical UV refugia by the benthic vegetative substrata. Bosmina ephippia exhibited a decreasing trend associated with increasing benthic production, indicating favorable environmental regime, and, together with chydorid ephippia, transient increases during the climate cooling of the LIA driven by shorter open-water season. |
format |
Other/Unknown Material |
author |
Nevalainen, Liisa Kivilä, E. Henriikka Rantala, Marttiina V. Luoto, Tomi P. |
spellingShingle |
Nevalainen, Liisa Kivilä, E. Henriikka Rantala, Marttiina V. Luoto, Tomi P. Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics |
author_facet |
Nevalainen, Liisa Kivilä, E. Henriikka Rantala, Marttiina V. Luoto, Tomi P. |
author_sort |
Nevalainen, Liisa |
title |
Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics |
title_short |
Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics |
title_full |
Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics |
title_fullStr |
Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics |
title_full_unstemmed |
Cladoceran (Crustacea) Niches, Sex, and Sun Bathing : A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics |
title_sort |
cladoceran (crustacea) niches, sex, and sun bathing : a long-term record of tundra lake (lapland) functioning and paleo-optics |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
http://hdl.handle.net/10138/305963 |
genre |
Tundra Lapland |
genre_facet |
Tundra Lapland |
op_relation |
Nevalainen, L.; Kivilä, E.H.; Rantala, M.V.; Luoto, T.P. Cladoceran (Crustacea) Niches, Sex, and Sun Bathing—A Long-Term Record of Tundra Lake (Lapland) Functioning and Paleo-Optics. Water 2019, 11, 2008. http://hdl.handle.net/10138/305963 |
_version_ |
1766229467418591232 |