Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic
We describe the physical and chemical properties of sixty-one tundra lakes, sampled in a latitudinal transect (65-71°N, 105-108°W) across mainland and island regions of Nunavut, central Canadian Arctic, and examine the influence of geology, geography, climate, and vegetation on lake water chemistry....
Published in: | Fundamental and Applied Limnology |
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2009
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Online Access: | https://ir.lib.uwo.ca/geographypub/122 https://doi.org/10.1127/1863-9135/2009/0175-0093 |
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ftunivwestonta:oai:ir.lib.uwo.ca:geographypub-1129 2023-10-01T03:53:22+02:00 Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic Westover, Karlyn S. Moser, Katrina A. Porinchu, David F. MacDonald, Glen M. Wang, Xiaowa 2009-07-01T07:00:00Z https://ir.lib.uwo.ca/geographypub/122 https://doi.org/10.1127/1863-9135/2009/0175-0093 unknown Scholarship@Western https://ir.lib.uwo.ca/geographypub/122 doi:10.1127/1863-9135/2009/0175-0093 http://dx.doi.org/10.1127/1863-9135/2009/0175-0093 Geography & Environment Publications Tundra Lakes Lake Water Chemistry Climate Change Ecoregions Geography article 2009 ftunivwestonta https://doi.org/10.1127/1863-9135/2009/0175-0093 2023-09-03T06:51:50Z We describe the physical and chemical properties of sixty-one tundra lakes, sampled in a latitudinal transect (65-71°N, 105-108°W) across mainland and island regions of Nunavut, central Canadian Arctic, and examine the influence of geology, geography, climate, and vegetation on lake water chemistry. This dataset complements earlier limnological surveys of the Canadian Arctic and provides valuable information for evaluating the vulnerability of tundra lakes to predicted climate change. Principal components analysis revealed a geographical clustering of lakes; pH, DIC, specific conductivity, and trace metal concentrations reflected major lithological differences between the mainland and Victoria Island. Clustering of mainland lakes by ecoregion was also detected. Lakes of the Queen Maud Gulf Lowland and Garry Lake Lowland ecoregions (north) differed from lakes of the Takijuq Lake Upland ecoregion (south) in depth, pH, and specific conductivity as well as nutrient, DOC, and chlorophyll-a concentrations. Ionic composition of the northern mainland lakes also indicated that the influence of marine aerosols and/or leaching of residual marine salts from post-glacial marine deposits exposed by isostatic rebound. The northern mainland lakes were the most nutrient-rich and biologically productive of the three lake clusters and were characterized by median concentrations of total dissolved nitrogen (518 μg l−1) and chlorophyll-a (1.6 μg l−1) that were higher than previously reported for tundra lakes in the Canadian Arctic. These lakes were chemically similar to lakes of the Tuktoyaktuk Peninsula, in the western Canadian Arctic. Lakes of the southern mainland were dilute, acidic, and nutrient-poor, in accord with earlier limnological surveys in this ecoregion. Concentrations of nutrients, DOC, and chlorophyll-a in Victoria Island lakes fell in the middle of the ranges reported from other islands in the Canadian Arctic. Lithologic and edaphic factors strongly influenced the limnological properties of the tundra lakes surveyed ... Article in Journal/Newspaper Arctic Climate change Nunavut Queen Maud Gulf Tundra Victoria Island The University of Western Ontario: Scholarship@Western Arctic Garry ENVELOPE(-62.233,-62.233,-63.350,-63.350) Island Lakes ENVELOPE(-128.226,-128.226,62.344,62.344) Nunavut Queen Maud Gulf ENVELOPE(-102.002,-102.002,68.334,68.334) Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) Tuktoyaktuk Peninsula ENVELOPE(-131.339,-131.339,69.750,69.750) Fundamental and Applied Limnology 175 2 93 112 |
institution |
Open Polar |
collection |
The University of Western Ontario: Scholarship@Western |
op_collection_id |
ftunivwestonta |
language |
unknown |
topic |
Tundra Lakes Lake Water Chemistry Climate Change Ecoregions Geography |
spellingShingle |
Tundra Lakes Lake Water Chemistry Climate Change Ecoregions Geography Westover, Karlyn S. Moser, Katrina A. Porinchu, David F. MacDonald, Glen M. Wang, Xiaowa Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic |
topic_facet |
Tundra Lakes Lake Water Chemistry Climate Change Ecoregions Geography |
description |
We describe the physical and chemical properties of sixty-one tundra lakes, sampled in a latitudinal transect (65-71°N, 105-108°W) across mainland and island regions of Nunavut, central Canadian Arctic, and examine the influence of geology, geography, climate, and vegetation on lake water chemistry. This dataset complements earlier limnological surveys of the Canadian Arctic and provides valuable information for evaluating the vulnerability of tundra lakes to predicted climate change. Principal components analysis revealed a geographical clustering of lakes; pH, DIC, specific conductivity, and trace metal concentrations reflected major lithological differences between the mainland and Victoria Island. Clustering of mainland lakes by ecoregion was also detected. Lakes of the Queen Maud Gulf Lowland and Garry Lake Lowland ecoregions (north) differed from lakes of the Takijuq Lake Upland ecoregion (south) in depth, pH, and specific conductivity as well as nutrient, DOC, and chlorophyll-a concentrations. Ionic composition of the northern mainland lakes also indicated that the influence of marine aerosols and/or leaching of residual marine salts from post-glacial marine deposits exposed by isostatic rebound. The northern mainland lakes were the most nutrient-rich and biologically productive of the three lake clusters and were characterized by median concentrations of total dissolved nitrogen (518 μg l−1) and chlorophyll-a (1.6 μg l−1) that were higher than previously reported for tundra lakes in the Canadian Arctic. These lakes were chemically similar to lakes of the Tuktoyaktuk Peninsula, in the western Canadian Arctic. Lakes of the southern mainland were dilute, acidic, and nutrient-poor, in accord with earlier limnological surveys in this ecoregion. Concentrations of nutrients, DOC, and chlorophyll-a in Victoria Island lakes fell in the middle of the ranges reported from other islands in the Canadian Arctic. Lithologic and edaphic factors strongly influenced the limnological properties of the tundra lakes surveyed ... |
format |
Article in Journal/Newspaper |
author |
Westover, Karlyn S. Moser, Katrina A. Porinchu, David F. MacDonald, Glen M. Wang, Xiaowa |
author_facet |
Westover, Karlyn S. Moser, Katrina A. Porinchu, David F. MacDonald, Glen M. Wang, Xiaowa |
author_sort |
Westover, Karlyn S. |
title |
Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic |
title_short |
Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic |
title_full |
Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic |
title_fullStr |
Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic |
title_full_unstemmed |
Physical and Chemical Limnology of a 61-lake Transect across Mainland Nunavut and Southeastern Victoria Island, Central Canadian Arctic |
title_sort |
physical and chemical limnology of a 61-lake transect across mainland nunavut and southeastern victoria island, central canadian arctic |
publisher |
Scholarship@Western |
publishDate |
2009 |
url |
https://ir.lib.uwo.ca/geographypub/122 https://doi.org/10.1127/1863-9135/2009/0175-0093 |
long_lat |
ENVELOPE(-62.233,-62.233,-63.350,-63.350) ENVELOPE(-128.226,-128.226,62.344,62.344) ENVELOPE(-102.002,-102.002,68.334,68.334) ENVELOPE(-133.006,-133.006,69.425,69.425) ENVELOPE(-131.339,-131.339,69.750,69.750) |
geographic |
Arctic Garry Island Lakes Nunavut Queen Maud Gulf Tuktoyaktuk Tuktoyaktuk Peninsula |
geographic_facet |
Arctic Garry Island Lakes Nunavut Queen Maud Gulf Tuktoyaktuk Tuktoyaktuk Peninsula |
genre |
Arctic Climate change Nunavut Queen Maud Gulf Tundra Victoria Island |
genre_facet |
Arctic Climate change Nunavut Queen Maud Gulf Tundra Victoria Island |
op_source |
Geography & Environment Publications |
op_relation |
https://ir.lib.uwo.ca/geographypub/122 doi:10.1127/1863-9135/2009/0175-0093 http://dx.doi.org/10.1127/1863-9135/2009/0175-0093 |
op_doi |
https://doi.org/10.1127/1863-9135/2009/0175-0093 |
container_title |
Fundamental and Applied Limnology |
container_volume |
175 |
container_issue |
2 |
container_start_page |
93 |
op_container_end_page |
112 |
_version_ |
1778519891310018560 |