Browsing by Author "University of Minnesota Voyageurs Wolf Project"

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    Data for: Wolves alter the trajectory of forests by shaping the central-place foraging behavior of an ecosystem engineer
    (2023-04-12) Gable, Thomas D; Johnson-Bice, Sean M; Homkes, Austin T; Fieberg, John R; Bump, Joseph K; gable079@umn.edu; Gable, Thomas D; University of Minnesota Voyageurs Wolf Project
    Dataset for Gable et al. 2023 where the authors describe how wolves indirectly alter the trajectory of forests by constraining the distance that beavers, a central place forager and prolific ecosystem engineer, forage from water. Specifically, Gable et al. demonstrate wolves wait-in-ambush and kill beavers on longer feeding trails than would be expected based on the spatiotemporal availability of beavers. This pattern is driven by temporal dynamics of beaver foraging: beavers make more foraging trips and spend more time on land per trip on longer feeding trails that extend farther from water. As a result, beavers are more vulnerable on longer feeding trails than shorter ones. Wolf predation appears to be a selective evolutionary pressure propelled by consumptive and non-consumptive mechanisms that constrain the distance from water beavers forage, which in turn limits the area of forest around wetlands, lakes, and rivers beavers alter through foraging. Thus, wolves appear intricately linked to boreal forest dynamics by shaping beaver foraging behavior, a form of natural disturbance that alters the successional and ecological states of forests.
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    Observations of wolves eating berries in the Greater Voyageurs Ecosystem
    (2024-07-18) Evavold, Isabella; Gable, Thomas D; Homkes, Austin T; Bump, Joseph K; gable079@umn.edu; Gable, Thomas; University of Minnesota Voyageurs Wolf Project
    Wolves are opportunistic generalists that can respond quickly to new and unique food sources. Wolves in some ecosystems will consume berries and other fruits when they are abundant and available, however many aspects of this behavior remain unknown. In the Greater Voyageurs Ecosystem (GVE), Minnesota, USA, wolves consistently consume berries, particularly blueberries, when they are available. We deployed remote cameras in blueberry patches to record wolves foraging on berries over several years. We captured footage of wolves of all age-classes, social statuses, and sex foraging on blueberries alone or with other wolves. Our observations indicate berry consumption by wolves is a widespread behavior in the GVE and likely similar southern boreal ecosystems. We hope our work spurs researchers across wolf range to examine whether berry consumption by wolves is a widespread and ubiquitous behavior for wolves.