Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited
Ponds and lakes distributed across northern treeline in the Hudson Bay Lowlands near Churchill (Manitoba) were revisited to analyse and document the local ecoclimatic and limnological changes that occurred over the period 1997-2012. Our analyses revealed that single events may cause significant chan...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:24487 2023-05-15T15:06:34+02:00 Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited Viehberg, Finn A. Pienitz, Reinhard 2017 https://kups.ub.uni-koeln.de/24487/ eng eng PAGEPRESS PUBL Viehberg, Finn A. and Pienitz, Reinhard (2017). Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited. J. Limnol., 76 (3). S. 451 - 469. PAVIA: PAGEPRESS PUBL. ISSN 1723-8633 ddc:no doc-type:article publishedVersion 2017 ftubkoeln 2022-11-09T07:19:46Z Ponds and lakes distributed across northern treeline in the Hudson Bay Lowlands near Churchill (Manitoba) were revisited to analyse and document the local ecoclimatic and limnological changes that occurred over the period 1997-2012. Our analyses revealed that single events may cause significant changes in salinity, pH and silicate content because of the limited buffer capacity of the inter-connected waters. Planktic freshwater microcrustaceans (Cladocera) presented less diverse assemblages and appeared to favour waters that are situated in the boreal forest, while the diversity of benthic species assemblages (Cladocera and Ostracoda) was highest in waters located closer to the coastline and in open tundra vegetation. We identified three species that are distinctive for the boreal ecozone (i.e., Candona acuta, Can. acutula and Can. decora) and two species (i.e., Tonnacypris glacialis and Can. rawsoni) that are elements of (sub-)arctic landscapes and potentially endangered as the northern treeline expands due to rapid warming. These species are thought to be useful indicators for future ecosystem quality assessments and/or ecosystem service management programs. Our findings were compared to other studies completed in the boreal Yukon Territory and revealed that species diversity is closely linked to landscape history. Article in Journal/Newspaper Arctic Churchill Hudson Bay Subarctic Tundra Yukon Cologne University: KUPS Arctic Canada Hudson Hudson Bay Yukon |
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English |
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ddc:no Viehberg, Finn A. Pienitz, Reinhard Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited |
topic_facet |
ddc:no |
description |
Ponds and lakes distributed across northern treeline in the Hudson Bay Lowlands near Churchill (Manitoba) were revisited to analyse and document the local ecoclimatic and limnological changes that occurred over the period 1997-2012. Our analyses revealed that single events may cause significant changes in salinity, pH and silicate content because of the limited buffer capacity of the inter-connected waters. Planktic freshwater microcrustaceans (Cladocera) presented less diverse assemblages and appeared to favour waters that are situated in the boreal forest, while the diversity of benthic species assemblages (Cladocera and Ostracoda) was highest in waters located closer to the coastline and in open tundra vegetation. We identified three species that are distinctive for the boreal ecozone (i.e., Candona acuta, Can. acutula and Can. decora) and two species (i.e., Tonnacypris glacialis and Can. rawsoni) that are elements of (sub-)arctic landscapes and potentially endangered as the northern treeline expands due to rapid warming. These species are thought to be useful indicators for future ecosystem quality assessments and/or ecosystem service management programs. Our findings were compared to other studies completed in the boreal Yukon Territory and revealed that species diversity is closely linked to landscape history. |
format |
Article in Journal/Newspaper |
author |
Viehberg, Finn A. Pienitz, Reinhard |
author_facet |
Viehberg, Finn A. Pienitz, Reinhard |
author_sort |
Viehberg, Finn A. |
title |
Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited |
title_short |
Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited |
title_full |
Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited |
title_fullStr |
Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited |
title_full_unstemmed |
Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited |
title_sort |
trends in ostracoda and cladocera distribution and water chemistry in subarctic canada: churchill (manitoba) lakes and ponds revisited |
publisher |
PAGEPRESS PUBL |
publishDate |
2017 |
url |
https://kups.ub.uni-koeln.de/24487/ |
geographic |
Arctic Canada Hudson Hudson Bay Yukon |
geographic_facet |
Arctic Canada Hudson Hudson Bay Yukon |
genre |
Arctic Churchill Hudson Bay Subarctic Tundra Yukon |
genre_facet |
Arctic Churchill Hudson Bay Subarctic Tundra Yukon |
op_relation |
Viehberg, Finn A. and Pienitz, Reinhard (2017). Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited. J. Limnol., 76 (3). S. 451 - 469. PAVIA: PAGEPRESS PUBL. ISSN 1723-8633 |
_version_ |
1766338142702403584 |