Over the limit: Consequences of gray squirrel personality on the shifting range limits of oak and hickory species

IF 3.5 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Global Ecology and Conservation Pub Date : 2025-03-12 DOI:10.1016/j.gecco.2025.e03539
Margaret R. Merz , Francesca Colombini , Alessio Mortelliti
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引用次数: 0

Abstract

Many trees must shift their ranges to track changing climate conditions, but their movement often depends on animal dispersers, which are overlooked in range shift predictions. We addressed this knowledge gap by assessing the dispersal of novel (i.e., not previously encountered) seeds by gray squirrels (Sciurus carolinensis) and analyzing intraspecific variation in dispersal decisions. We established a field experiment spanning the northern range limits of multiple oak (Quercus) and hickory (Carya) species in Northeastern USA and measured personality of 222 squirrels, further recording seed decisions by 50 individuals. Squirrels dispersed novel seeds, illustrating their critical role in tree range shifts, with sociality and weight mediating decisions. Seed novelty mediated certain decisions such as the consumption of removed seeds, while other decisions were consistent regardless of novelty. Overall, individuals contributed to novel seed dispersal differently based on personality, highlighting the need to preserve behavioral diversity to facilitate tree range shifts.
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来源期刊
Global Ecology and Conservation
Global Ecology and Conservation Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.10
自引率
5.00%
发文量
346
审稿时长
83 days
期刊介绍: Global Ecology and Conservation is a peer-reviewed, open-access journal covering all sub-disciplines of ecological and conservation science: from theory to practice, from molecules to ecosystems, from regional to global. The fields covered include: organismal, population, community, and ecosystem ecology; physiological, evolutionary, and behavioral ecology; and conservation science.
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