10.5061/DRYAD.T474MN0
Service, Christina N.
University of Victoria
Raincoast Conservation Foundation
Bateman, Andrew W.
University of Alberta
University of Victoria
Adams, Megan S.
University of Victoria
Raincoast Conservation Foundation
Artelle, Kyle A.
University of Victoria
Raincoast Conservation Foundation
Simon Fraser University
Reimchen, Thomas E.
University of Victoria
Paquet, Paul C.
University of Victoria
Raincoast Conservation Foundation
Darimont, Chris T.
University of Victoria
Raincoast Conservation Foundation
Data from: Salmonid species diversity predicts salmon consumption by
terrestrial wildlife
Dryad
dataset
2019
grizzly bear
stable isotope analysis
Ursus
Foraging
Salmon
Black bear
resource waves
2019-01-09T21:25:43Z
2019-01-09T21:25:43Z
en
https://doi.org/10.1111/1365-2656.12932
20243 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Resource waves - spatial variation in resource phenology that extends
feeding opportunities for mobile consumers - can affect the behaviour and
productivity of recipient populations. Interspecific diversity among
Pacific salmon species (Oncorhynchus spp.) creates staggered spawning
events across space and time, thereby prolonging availability to
terrestrial wildlife. 2. We aim to understand how such variation might
influence consumption by terrestrial predators compared with resource
abundance and intra- and inter- specific competition. 3. Using stable
isotope analysis, we investigated how the proportion of salmon in the
annual diet of male black bears (Ursus americanus; n = 405) varies with
species diversity and density of spawning salmon biomass, while also
accounting for competition with conspecific black and grizzly bears (U.
arctos horribilis), in coastal British Columbia, Canada. 4. We found that
the proportion of salmon in the annual diet of black bears increased by
≈40% in the absence of grizzly bears, but detected little effect of
relative black bear density and salmon biomass density. Rather, salmon
diversity had the largest positive effect on consumption. On average,
increasing diversity from one salmon species to ~four (with equal biomass
contributions) approximately triples the proportion of salmon in diet. 5.
Given the importance of salmon to bear reproduction, this work provides
early empirical support for how resource waves may increase the
productivity of consumers at population and landscape scales. Accordingly,
terrestrial wildlife management might consider maintaining not only salmon
abundance but also diversity.
Data from Service et al. JAEAll data to support the analysis of black bear
salmon consumption ("prop.salmon") in relationship to salmon
species diversity ("diversity"), salmon biomass
("biomass"), grizzly bear presence ("griz"), and black
bear abundance ("blackbear"). All continuous data are presented
raw (suffix ".raw") and in centered and standardized form (no
suffix). Random effects of year ("year") and watershed
("wsdID") are included. All bear related data are from a
multiyear field sampling effort. All salmon related data are derived from
a publically available salmon enumeration database that is curated by the
Department of Fisheries and Oceans
(Canada).Service_et_al_2018_JAE_data.csv