Disjunctions of Needle-leaved Sedge (Carex duriuscula) and Thread-leaved Sedge (Carex filifolia) in the Husky Lakes area of Northwest Territories—first records for the Canadian true Arctic and possible Pleistocene relicts

Disjunctions are reported for Needle-leaved Sedge (Carex duriuscula) and Thread-leaved Sedge (Carex filifolia) into the Arctic region of Northwest Territories at the Husky Lakes south of Tuktoyaktuk. These are significant additions to the Canadian Arctic flora and may be part of a group of relicts o...

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Bibliographic Details
Published in:The Canadian Field-Naturalist
Main Authors: Catling, Paul M., Kostiuk, Brenda
Format: Article in Journal/Newspaper
Language:English
Published: The Ottawa Field-Naturalists' Club 2020
Subjects:
Cyperaceae
Carex duriuscula
Carex filifolia
phytogeography
relict
Tundra-steppe
Beringia
Northwest Territories
Arctic
Husky Lakes
Mackenzie Delta
Tuktoyaktuk
Tundra
Online Access:https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/2363
https://doi.org/10.22621/cfn.v134i3.2363
Description
Summary:Disjunctions are reported for Needle-leaved Sedge (Carex duriuscula) and Thread-leaved Sedge (Carex filifolia) into the Arctic region of Northwest Territories at the Husky Lakes south of Tuktoyaktuk. These are significant additions to the Canadian Arctic flora and may be part of a group of relicts of the Arctic vegetation of the Pleistocene, specifically the Tundra-steppe. The occurrence of relict vegetation east of the Mackenzie Delta is east of its frequently cited eastern limit in North America.

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