October 3, 2025Quaternary ResearchOpen Access

Latest Pleistocene (17,500–13,500 cal yr BP) Arctic ground squirrel (Sciuridae: Urocitellus parryii) middens record late persistence of steppe-tundra in central Yukon Territory

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Findings indicate steppe-tundra persistence until at least 13,680 cal yr BP, contrasting with shrub expansion elsewhere.
Plant and invertebrate macrofossil records featured 24 and 20 taxa, respectively, highlighting unique ecological data.
Palaeoecological analysis examined Arctic ground squirrel middens across three sites in the Yukon Territory.
Study emphasizes the ecological dynamics of steppe-tundra despite regional shifts towards shrubland.

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Palaeoecological analysis shows late persistence of steppe-tundra in Yukon, indicating ecological dynamics.

Cocker et al. (2025) studied this question.

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