Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada)
Evidence from remote sensing studies suggests that the frequency of thermokarst lake drainage events is increasing in response to climate change, but the consequences of these changes on the limnology of remaining waterbodies remain unknown. Here, we utilize a multiparameter paleolimnological record...
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crcansciencepubl:10.1139/as-2016-0012 2024-09-15T17:49:59+00:00 Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) Tondu, Jana M.E. Turner, Kevin W. Wiklund, Johan A. Wolfe, Brent B. Hall, Roland I. McDonald, Ian 2017 http://dx.doi.org/10.1139/as-2016-0012 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2016-0012 https://cdnsciencepub.com/doi/pdf/10.1139/as-2016-0012 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Arctic Science volume 3, issue 2, page 220-236 ISSN 2368-7460 2368-7460 journal-article 2017 crcansciencepubl https://doi.org/10.1139/as-2016-0012 2024-07-04T04:10:01Z Evidence from remote sensing studies suggests that the frequency of thermokarst lake drainage events is increasing in response to climate change, but the consequences of these changes on the limnology of remaining waterbodies remain unknown. Here, we utilize a multiparameter paleolimnological record and post-drainage water isotope and chemistry monitoring to characterize the limnological evolution of Zelma Lake in Old Crow Flats, Yukon. During the early part of the record (~1678 to 1900 CE), analysis of geochemical variables and algal pigments indicate relatively stable limnological conditions. Abruptly beginning at ~1900, Zelma Lake experienced a 40 year phase of reduced production, likely resulting from thermokarst shoreline expansion and associated increases in turbidity and low light availability. This was followed by ~70 years of increasing production, likely from the stabilization of shorelines combined with a warming climate. Zelma Lake catastrophically drained in June 2007. Post-drainage conditions were characterized by intense eutrophication marked by increases in nutrient and major ion concentrations and the unprecedented occurrence of okenone and diatoxanthin pigments. Comparison to the post-drainage paleolimnological record from another thermokarst lake in Old Crow Flats indicates that a sharp increase of production is likely a common outcome of thermokarst lake drainage, yet intensity differs owing to site-specific catchment characteristics. Article in Journal/Newspaper Arctic Old Crow Thermokarst Yukon Canadian Science Publishing Arctic Science 3 2 220 236 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Evidence from remote sensing studies suggests that the frequency of thermokarst lake drainage events is increasing in response to climate change, but the consequences of these changes on the limnology of remaining waterbodies remain unknown. Here, we utilize a multiparameter paleolimnological record and post-drainage water isotope and chemistry monitoring to characterize the limnological evolution of Zelma Lake in Old Crow Flats, Yukon. During the early part of the record (~1678 to 1900 CE), analysis of geochemical variables and algal pigments indicate relatively stable limnological conditions. Abruptly beginning at ~1900, Zelma Lake experienced a 40 year phase of reduced production, likely resulting from thermokarst shoreline expansion and associated increases in turbidity and low light availability. This was followed by ~70 years of increasing production, likely from the stabilization of shorelines combined with a warming climate. Zelma Lake catastrophically drained in June 2007. Post-drainage conditions were characterized by intense eutrophication marked by increases in nutrient and major ion concentrations and the unprecedented occurrence of okenone and diatoxanthin pigments. Comparison to the post-drainage paleolimnological record from another thermokarst lake in Old Crow Flats indicates that a sharp increase of production is likely a common outcome of thermokarst lake drainage, yet intensity differs owing to site-specific catchment characteristics. |
format |
Article in Journal/Newspaper |
author |
Tondu, Jana M.E. Turner, Kevin W. Wiklund, Johan A. Wolfe, Brent B. Hall, Roland I. McDonald, Ian |
spellingShingle |
Tondu, Jana M.E. Turner, Kevin W. Wiklund, Johan A. Wolfe, Brent B. Hall, Roland I. McDonald, Ian Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) |
author_facet |
Tondu, Jana M.E. Turner, Kevin W. Wiklund, Johan A. Wolfe, Brent B. Hall, Roland I. McDonald, Ian |
author_sort |
Tondu, Jana M.E. |
title |
Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) |
title_short |
Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) |
title_full |
Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) |
title_fullStr |
Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) |
title_full_unstemmed |
Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada) |
title_sort |
limnological evolution of zelma lake, a recently drained thermokarst lake in old crow flats (yukon, canada) |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/as-2016-0012 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2016-0012 https://cdnsciencepub.com/doi/pdf/10.1139/as-2016-0012 |
genre |
Arctic Old Crow Thermokarst Yukon |
genre_facet |
Arctic Old Crow Thermokarst Yukon |
op_source |
Arctic Science volume 3, issue 2, page 220-236 ISSN 2368-7460 2368-7460 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/as-2016-0012 |
container_title |
Arctic Science |
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3 |
container_issue |
2 |
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220 |
op_container_end_page |
236 |
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1810291824103784448 |