Farthest north lake and fjord populations of calanoid copepods Limnocalanus macrurus and Drepanopus bungei in the Canadian high Arctic

Polar Biology ◽  
2001 ◽  
Vol 24 (5) ◽  
pp. 303-307 ◽  
Author(s):  
Patrick Van Hove ◽  
Kerrie Swadling ◽  
John Gibson ◽  
Claude Belzile ◽  
Warwick Vincent
Keyword(s):  
High Arctic ◽  
Calanoid Copepods ◽  
Canadian High Arctic ◽  
Limnocalanus Macrurus ◽  
North Lake

Slow growth and decomposition of mosses in Arctic lakes

1999 ◽  
Vol 56 (3) ◽  
pp. 388-393 ◽  
Author(s):  
Kaj Sand-Jensen ◽  
Tenna Riis ◽  
Stiig Markager ◽  
Warwick F Vincent
Keyword(s):  
High Arctic ◽  
Arctic Lakes ◽  
Canadian High Arctic ◽  
Cold Temperatures ◽  
Direct Measurements ◽  
Aquatic Mosses ◽  
Lake Bottom ◽  
Different Depths ◽  
North Lake ◽  
Methodological Difficulties

Aquatic mosses are often the exclusive form of macrophytic vegetation in Arctic lakes. Despite the cold nutrient-poor water and the short ice-free summer, the mosses form dense stands on the lake bottom down to great depths. The environmental conditions suggest that moss growth and decomposition are extremely slow, but logistical and methodological difficulties have so far precluded direct measurements of the processes. Here, we use temporal changes in the size and density of leaves along the axis of moss shoots collected from different depths in Char Lake and North Lake in the Canadian High Arctic to reconstruct the annual growth and decomposition of the mosses during the past 10-17 years. Our results show low but remarkably constant annual elongation rates (about 10 mm·shoot-1) in the long-lived shoots that carry green leaves for several years and decompose slowly. Cold temperatures and low nutrient supply in combination with the short Arctic growing season can account for the low growth rate, the low decomposition rates, and the unprecedented longevity of these moss communities relative to other submerged macrophytes.

Structural variation in the songs of Atlantic walruses breeding in the Canadian High Arctic

2003 ◽  
Vol 29 (2) ◽  
pp. 297-318 ◽  
Author(s):  
Becky Sjare ◽  
Ian Stirling ◽  
Cheryl Spencer
Keyword(s):  
Structural Variation ◽  
High Arctic ◽  
Canadian High Arctic

In situ optical and microphysical properties of tropospheric aerosols in the Canadian High Arctic from 2016 to 2019

2021 ◽  
Vol 250 ◽  
pp. 118254
Author(s):  
Andy Vicente-Luis ◽  
Samantha Tremblay ◽  
Joelle Dionne ◽  
Rachel Y.-W. Chang ◽  
Pierre F. Fogal ◽  
...  
Keyword(s):  
High Arctic ◽  
Canadian High Arctic ◽  
Microphysical Properties ◽  
Tropospheric Aerosols

scholarly journals Climate Change Drives Widespread and Rapid Thermokarst Development in Very Cold Permafrost in the Canadian High Arctic

2019 ◽  
Vol 46 (12) ◽  
pp. 6681-6689 ◽  
Author(s):  
Louise M. Farquharson ◽  
Vladimir E. Romanovsky ◽  
William L. Cable ◽  
Donald A. Walker ◽  
Steven V. Kokelj ◽  
...  
Keyword(s):  
Climate Change ◽  
High Arctic ◽  
Canadian High Arctic

Carbon sources for lake food webs in the Canadian High Arctic and other regions of Arctic North America

Polar Biology ◽  
2010 ◽  
Vol 33 (8) ◽  
pp. 1111-1123 ◽  
Author(s):  
John Chételat ◽  
Louise Cloutier ◽  
Marc Amyot
Keyword(s):  
North America ◽  
Food Webs ◽  
Carbon Sources ◽  
High Arctic ◽  
Canadian High Arctic
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