Evidence map›Paper›PMID 34429359›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Variable strategies to solve risk-reward tradeoffs in carnivore communities.

Joel Ruprecht, Charlotte E Eriksson, Tavis D Forrester, Derek B Spitz, Darren A Clark, Michael J Wisdom, Marcus Bianco, Mary M Rowland, Joshua B Smith, Bruce K Johnson and 1 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed.

  1. Article
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  5. Diets, dominance hierarchies, and kleptoparasitism drive asymmetrical interactions between wolves and cougars.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  6. Density and Coexistence Patterns of an Apex Carnivore (Animals : an open access journal from MDPI · 2026
    Article
  7. Article
  8. Article
  9. Article
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  11. Article
  12. Article
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  15. Nearby night lighting, rather than sky glow, is associated with habitat selection by a top predator in human-dominated landscapes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Article
  16. Diet selection in the CoyoteJournal of mammalogy · 2023
    Article
  17. Article
  18. Article
  19. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Joel RuprechtDepartment of Fisheries, Wildlife, and Conservation Sciences, Oregon State University, Corvallis, OR 97331; ruprechtjoel@gmail.com.ORCID 0000-0002-9443-7582
Charlotte E ErikssonDepartment of Fisheries, Wildlife, and Conservation Sciences, Oregon State University, Corvallis, OR 97331.
Tavis D ForresterOregon Department of Fish and Wildlife, La Grande, OR 97850.ORCID 0000-0001-6762-4115
Derek B SpitzEnvironmental Studies Department, University of California, Santa Cruz, CA 95064.
Darren A ClarkOregon Department of Fish and Wildlife, La Grande, OR 97850.ORCID 0000-0002-8738-9826
Michael J WisdomUS Department of Agriculture Forest Service Pacific Northwest Research Station, La Grande, OR 97850.ORCID 0000-0001-7899-4277
Marcus BiancoOregon Department of Fish and Wildlife, La Grande, OR 97850.
Mary M RowlandUS Department of Agriculture Forest Service Pacific Northwest Research Station, La Grande, OR 97850.ORCID 0000-0001-5766-8683
Joshua B SmithOregon Department of Fish and Wildlife, La Grande, OR 97850.
Bruce K JohnsonOregon Department of Fish and Wildlife, La Grande, OR 97850.
Taal LeviDepartment of Fisheries, Wildlife, and Conservation Sciences, Oregon State University, Corvallis, OR 97331.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mesopredator release theory suggests that dominant predators suppress subordinate carnivores and ultimately shape community dynamics, but the assumption that subordinate species are only negatively affected ignores the possibility of facilitation through scavenging. We examined the interplay within a carnivore community consisting of cougars, coyotes, black bears, and bobcats using contemporaneous Global Positioning System telemetry data from 51 individuals; diet analysis from 972 DNA-metabarcoded scats; and data from 128 physical investigations of cougar kill sites, 28 of which were monitored with remote cameras. Resource provisioning from competitively dominant cougars to coyotes through scavenging was so prolific as to be an overwhelming determinant of coyote behavior, space use, and resource acquisition. This was evident via the strong attraction of coyotes to cougar kill sites, frequent scavenging of cougar-killed prey, and coyote diets that nearly matched cougars in the magnitude of ungulate consumption. Yet coyotes were often killed by cougars and used space to minimize encounters, complicating the fitness benefits gained from scavenging. We estimated that 23% (95% CI: 8 to 55%) of the coyote population in our study area was killed by cougars annually, suggesting that coyote interactions with cougars are a complex behavioral game of risk and reward. In contrast, we found no indication that bobcat space use or diet was influenced by cougars. Black bears avoided cougars, but there was no evidence of attraction to cougar kill sites and much lower levels of ungulate consumption and carcass visitation than for coyotes. Interspecific interactions among carnivores are multifaceted, encompassing both suppression and facilitation.

Indexed as

Food ChainPredatory BehaviorRewardAnimalsCarnivoraCoyotesEcosystemLynxPopulation DynamicsPumaUrsidaecarnivorefacilitationmesopredator releasescavengingsuppression

Identifiers

PMID34429359
PMCPMC8536332

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.