Coupled landscape-lake evolution in High Arctic Canada
We profiled five ice-covered lakes and two ice-covered fiords of Ellesmere Island at the northern limit of High Arctic Canada to examine their environmental characteristics, and to evaluate the long-term limnological consequences of changes in their surrounding landscape through time (landscape evol...
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National Research Council Canada-N R C Research Press
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Online Access: | https://doi.org/10.1139/E06-003 http://ecite.utas.edu.au/41995 |
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ftunivtasecite:oai:ecite.utas.edu.au:41995 2023-05-15T14:25:01+02:00 Coupled landscape-lake evolution in High Arctic Canada Van Hove, PD Belzile, C Gibson, JAE Vincent, WF 2006 https://doi.org/10.1139/E06-003 http://ecite.utas.edu.au/41995 en eng National Research Council Canada-N R C Research Press http://dx.doi.org/10.1139/E06-003 Van Hove, PD and Belzile, C and Gibson, JAE and Vincent, WF, Coupled landscape-lake evolution in High Arctic Canada, Canadian Journal of Earth Sciences, 43, (5) pp. 533-546. ISSN 0008-4077 (2006) [Refereed Article] http://ecite.utas.edu.au/41995 Earth Sciences Physical Geography and Environmental Geoscience Geomorphology and Regolith and Landscape Evolution Refereed Article PeerReviewed 2006 ftunivtasecite https://doi.org/10.1139/E06-003 2019-12-13T21:18:40Z We profiled five ice-covered lakes and two ice-covered fiords of Ellesmere Island at the northern limit of High Arctic Canada to examine their environmental characteristics, and to evaluate the long-term limnological consequences of changes in their surrounding landscape through time (landscape evolution). All of the ecosystems showed strong patterns of thermal, chemical, and biological stratification with subsurface temperature maxima from 0.75 to 12.15 C; conductivities up to 98.1 mS cm-1 (twice that of seawater) in some bottom waters; pronounced gradients in nitrogen, phosphorus, pH, dissolved inorganic and organic carbon, manganese, iron, and oxygen; and stratified photosynthetic communities. These ecosystems form an inferred chronosequence that reflects different steps of landscape evolution including marine embayments open to the sea, inlets blocked by thick sea ice (Disraeli Fiord, Taconite Inlet), perennially ice-capped, saline lakes isolated from the sea by isostatic uplift (Lakes A, C1, C2), and isolated lakes that lose their ice cover in summer. The latter are subject to entrainment of saline water into their upper water column by wind-induced mixing (Lake Romulus; Lake A in 2000), or complete flushing of their basins by dilute snowmelt (Lake C3 and Char Lake, which lies 650 km to the south of the Ellesmere lakes region). This chronosequence illustrates how changes in geomorphology and other landscape properties may influence the limnology of coastal, high-latitude lakes, and it provides a framework to explore the potential impacts of climate change. 2006 NRC Canada. Article in Journal/Newspaper Arctic Arctic Climate change Ellesmere Island Sea ice eCite UTAS (University of Tasmania) Arctic Canada Disraeli Fiord ENVELOPE(-73.344,-73.344,82.819,82.819) Ellesmere Island Romulus Lake ENVELOPE(-85.083,-85.083,79.867,79.867) Taconite Inlet ENVELOPE(-78.213,-78.213,82.852,82.852) Canadian Journal of Earth Sciences 43 5 533 546 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Geomorphology and Regolith and Landscape Evolution |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Geomorphology and Regolith and Landscape Evolution Van Hove, PD Belzile, C Gibson, JAE Vincent, WF Coupled landscape-lake evolution in High Arctic Canada |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Geomorphology and Regolith and Landscape Evolution |
description |
We profiled five ice-covered lakes and two ice-covered fiords of Ellesmere Island at the northern limit of High Arctic Canada to examine their environmental characteristics, and to evaluate the long-term limnological consequences of changes in their surrounding landscape through time (landscape evolution). All of the ecosystems showed strong patterns of thermal, chemical, and biological stratification with subsurface temperature maxima from 0.75 to 12.15 C; conductivities up to 98.1 mS cm-1 (twice that of seawater) in some bottom waters; pronounced gradients in nitrogen, phosphorus, pH, dissolved inorganic and organic carbon, manganese, iron, and oxygen; and stratified photosynthetic communities. These ecosystems form an inferred chronosequence that reflects different steps of landscape evolution including marine embayments open to the sea, inlets blocked by thick sea ice (Disraeli Fiord, Taconite Inlet), perennially ice-capped, saline lakes isolated from the sea by isostatic uplift (Lakes A, C1, C2), and isolated lakes that lose their ice cover in summer. The latter are subject to entrainment of saline water into their upper water column by wind-induced mixing (Lake Romulus; Lake A in 2000), or complete flushing of their basins by dilute snowmelt (Lake C3 and Char Lake, which lies 650 km to the south of the Ellesmere lakes region). This chronosequence illustrates how changes in geomorphology and other landscape properties may influence the limnology of coastal, high-latitude lakes, and it provides a framework to explore the potential impacts of climate change. 2006 NRC Canada. |
format |
Article in Journal/Newspaper |
author |
Van Hove, PD Belzile, C Gibson, JAE Vincent, WF |
author_facet |
Van Hove, PD Belzile, C Gibson, JAE Vincent, WF |
author_sort |
Van Hove, PD |
title |
Coupled landscape-lake evolution in High Arctic Canada |
title_short |
Coupled landscape-lake evolution in High Arctic Canada |
title_full |
Coupled landscape-lake evolution in High Arctic Canada |
title_fullStr |
Coupled landscape-lake evolution in High Arctic Canada |
title_full_unstemmed |
Coupled landscape-lake evolution in High Arctic Canada |
title_sort |
coupled landscape-lake evolution in high arctic canada |
publisher |
National Research Council Canada-N R C Research Press |
publishDate |
2006 |
url |
https://doi.org/10.1139/E06-003 http://ecite.utas.edu.au/41995 |
long_lat |
ENVELOPE(-73.344,-73.344,82.819,82.819) ENVELOPE(-85.083,-85.083,79.867,79.867) ENVELOPE(-78.213,-78.213,82.852,82.852) |
geographic |
Arctic Canada Disraeli Fiord Ellesmere Island Romulus Lake Taconite Inlet |
geographic_facet |
Arctic Canada Disraeli Fiord Ellesmere Island Romulus Lake Taconite Inlet |
genre |
Arctic Arctic Climate change Ellesmere Island Sea ice |
genre_facet |
Arctic Arctic Climate change Ellesmere Island Sea ice |
op_relation |
http://dx.doi.org/10.1139/E06-003 Van Hove, PD and Belzile, C and Gibson, JAE and Vincent, WF, Coupled landscape-lake evolution in High Arctic Canada, Canadian Journal of Earth Sciences, 43, (5) pp. 533-546. ISSN 0008-4077 (2006) [Refereed Article] http://ecite.utas.edu.au/41995 |
op_doi |
https://doi.org/10.1139/E06-003 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
43 |
container_issue |
5 |
container_start_page |
533 |
op_container_end_page |
546 |
_version_ |
1766297459216089088 |