Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories
1. Global warming is predicted to cause changes in permafrost cover and stability in the Arctic. Zones of high ion concentration in regions of ice-rich permafrost are a reservoir of chemicals that can potentially be transferred to fresh waters during thawing. Consequently, input of enriched runoff f...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.816875 2024-09-15T17:51:30+00:00 Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories Mesquita, Patricia S Wrona, Frederick J Prowse, Terry D LATITUDE: 69.190000 * LONGITUDE: -134.150000 * DATE/TIME START: 2006-08-26T00:00:00 * DATE/TIME END: 2006-08-26T00:00:00 2010 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.816875 https://doi.org/10.1594/PANGAEA.816875 en eng PANGAEA Exact locations of lakes - jpeg file (2010). Mesquita et al. (2010), hdl:10013/epic.41826.d001 Exact locations of lakes - kmz file (2010). Mesquita et al. (2010), hdl:10013/epic.41826.d002 https://doi.pangaea.de/10.1594/PANGAEA.816875 https://doi.org/10.1594/PANGAEA.816875 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Mesquita, Patricia S; Wrona, Frederick J; Prowse, Terry D (2010): Effects of retrogressive permafrost thaw slumping on sediment chemistry and submerged macrophytes in Arctic tundra lakes. Freshwater Biology, 55(11), 2347-2358, https://doi.org/10.1111/j.1365-2427.2010.02450.x International Polar Year (2007-2008) IPY Mackenzie_area MULT Multiple investigations Northwest Territories Canada dataset publication series 2010 ftpangaea https://doi.org/10.1594/PANGAEA.81687510.1111/j.1365-2427.2010.02450.x 2024-07-24T02:31:21Z 1. Global warming is predicted to cause changes in permafrost cover and stability in the Arctic. Zones of high ion concentration in regions of ice-rich permafrost are a reservoir of chemicals that can potentially be transferred to fresh waters during thawing. Consequently, input of enriched runoff from the thaw and sediment and vegetation from the landscape could alter lakes by affecting their geochemistry and biological production. 2. Three undisturbed lakes and five lakes disturbed by retrogressive permafrost thaw slumps were sampled during late summer of 2006 to assess the potential effects of thermokarst shoreline slumping on water and sediment chemistry, the underwater light regime, and benthic macrophyte biomass and community structure. 3. Undisturbed lakes had sediments rich in organic material and selected micronutrients, while disturbed lakes had sediments richer in calcium, magnesium and strontium, greater transparency of the water column, and a well-developed submerged macrophyte community. 4. It is postulated that enriched runoff chemistry may alter nutrient availability at the sediment-water interface and also the degradation of organic material, thus affecting lake transparency and submerged macrophytes. The results suggest that retrogressive permafrost slumping can significantly affect food webs in arctic tundra lakes through an increase in macrophyte biomass and development of a more complex benthic habitat. Other/Unknown Material Arctic Global warming Ice International Polar Year IPY Northwest Territories permafrost Thermokarst Tundra PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-134.150000,-134.150000,69.190000,69.190000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY Mackenzie_area MULT Multiple investigations Northwest Territories Canada |
spellingShingle |
International Polar Year (2007-2008) IPY Mackenzie_area MULT Multiple investigations Northwest Territories Canada Mesquita, Patricia S Wrona, Frederick J Prowse, Terry D Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories |
topic_facet |
International Polar Year (2007-2008) IPY Mackenzie_area MULT Multiple investigations Northwest Territories Canada |
description |
1. Global warming is predicted to cause changes in permafrost cover and stability in the Arctic. Zones of high ion concentration in regions of ice-rich permafrost are a reservoir of chemicals that can potentially be transferred to fresh waters during thawing. Consequently, input of enriched runoff from the thaw and sediment and vegetation from the landscape could alter lakes by affecting their geochemistry and biological production. 2. Three undisturbed lakes and five lakes disturbed by retrogressive permafrost thaw slumps were sampled during late summer of 2006 to assess the potential effects of thermokarst shoreline slumping on water and sediment chemistry, the underwater light regime, and benthic macrophyte biomass and community structure. 3. Undisturbed lakes had sediments rich in organic material and selected micronutrients, while disturbed lakes had sediments richer in calcium, magnesium and strontium, greater transparency of the water column, and a well-developed submerged macrophyte community. 4. It is postulated that enriched runoff chemistry may alter nutrient availability at the sediment-water interface and also the degradation of organic material, thus affecting lake transparency and submerged macrophytes. The results suggest that retrogressive permafrost slumping can significantly affect food webs in arctic tundra lakes through an increase in macrophyte biomass and development of a more complex benthic habitat. |
format |
Other/Unknown Material |
author |
Mesquita, Patricia S Wrona, Frederick J Prowse, Terry D |
author_facet |
Mesquita, Patricia S Wrona, Frederick J Prowse, Terry D |
author_sort |
Mesquita, Patricia S |
title |
Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories |
title_short |
Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories |
title_full |
Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories |
title_fullStr |
Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories |
title_full_unstemmed |
Physical, chemical and biological characteristics of disturbed and undisturbed Arctic lakes, Northwest Territories |
title_sort |
physical, chemical and biological characteristics of disturbed and undisturbed arctic lakes, northwest territories |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.816875 https://doi.org/10.1594/PANGAEA.816875 |
op_coverage |
LATITUDE: 69.190000 * LONGITUDE: -134.150000 * DATE/TIME START: 2006-08-26T00:00:00 * DATE/TIME END: 2006-08-26T00:00:00 |
long_lat |
ENVELOPE(-134.150000,-134.150000,69.190000,69.190000) |
genre |
Arctic Global warming Ice International Polar Year IPY Northwest Territories permafrost Thermokarst Tundra |
genre_facet |
Arctic Global warming Ice International Polar Year IPY Northwest Territories permafrost Thermokarst Tundra |
op_source |
Supplement to: Mesquita, Patricia S; Wrona, Frederick J; Prowse, Terry D (2010): Effects of retrogressive permafrost thaw slumping on sediment chemistry and submerged macrophytes in Arctic tundra lakes. Freshwater Biology, 55(11), 2347-2358, https://doi.org/10.1111/j.1365-2427.2010.02450.x |
op_relation |
Exact locations of lakes - jpeg file (2010). Mesquita et al. (2010), hdl:10013/epic.41826.d001 Exact locations of lakes - kmz file (2010). Mesquita et al. (2010), hdl:10013/epic.41826.d002 https://doi.pangaea.de/10.1594/PANGAEA.816875 https://doi.org/10.1594/PANGAEA.816875 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81687510.1111/j.1365-2427.2010.02450.x |
_version_ |
1810293410668478464 |