Broad aggressive interactions among African carnivores suggest intraguild killing is driven by more than competition

Theory on intraguild killing (IGK) is central to mammalian carnivore community ecology and top-down ecosystem regulation. Yet, the cryptic nature of IGK hinders empirical evaluations. Using a novel data source – online photographs of interspecific aggression between African carnivores – we revisited...

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Vydáno v:Ecology (Durham) Ročník 103; číslo 2; s. 1 - 12
Hlavní autoři: Curveira-Santos, Gonçalo, Gigliotti, Laura, Silva, André P., Sutherland, Chris, Foord, Stefan, Santos-Reis, Margarida, Swanepoel, Lourens H.
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States John Wiley and Sons, Inc 01.02.2022
Ecological Society of America
Témata:
Aggression
Animals
Carnivora
Carnivora - physiology
Carnivores
Community ecology
Competition
ecological networks
Ecology
Ecosystem
ecosystems
Felidae
Google Images
interspecific killing
intraguild predation
mammals
Mass ratios
mesopredator release
Predatory Behavior - physiology
Species
species interactions
Sympatric populations
sympatry
top-down control
Google Images
interspecific killing
Carnivora
ecological networks
top-down control
species interactions
intraguild predation
competition
mesopredator release
ISSN:0012-9658, 1939-9170, 1939-9170
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Popis
Shrnutí:Theory on intraguild killing (IGK) is central to mammalian carnivore community ecology and top-down ecosystem regulation. Yet, the cryptic nature of IGK hinders empirical evaluations. Using a novel data source – online photographs of interspecific aggression between African carnivores – we revisited existing predictions about the extent and drivers of IGK. Compared with seminal reviews, our constructed IGK network yielded 10 more species and nearly twice as many interactions. The extent of interactions increased 37% when considering intraguild aggression (direct attack) as a precursor of killing events. We show that IGKoccurs over a wider range of body-mass ratios than predicted by standing competition-based views, with highly asymmetrical interactions being pervasive. Evidence that large species, particularly hypercarnivore felids, target sympatric carnivores with a wide range of body sizes suggests that current IGK theory is incomplete, underestimating alternative competition pathways and the role of predatory and incidental killing. Our findings reinforce the potential for IGK-mediated cascades in species-rich assemblages and community-wide suppressive effects of large carnivores.
Bibliografie:Corresponding Editor: Matthew J. Kauffman.
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ISSN:0012-9658
1939-9170
1939-9170
DOI:10.1002/ecy.3600