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Intraguild (IG) predation and interspecific competition may affect the settlement and success of species in their habitats. Using data on forest-dwelling hawks from Finland, we addressed the impact of an IG predator, the northern goshawk Accipiter gentilis (goshawk), on the breeding of an IG prey, the common buzzard Buteo buteo. We hypothesized that the subordinate common buzzard avoids breeding in the proximity of goshawks and that interspecific competitors, mainly Strix owls, may also disturb common buzzards by competing for nests and food. Our results show that common buzzards more frequently occupied territories with a low IG predation threat and with no interspecific competitors. We also observed that common buzzards avoided territories with high levels of grouse, the main food of goshawks, possibly due to a risk of IG predation since abundant grouse can attract goshawks. High levels of small rodents attracted interspecific competitors to common buzzard territories and created a situation where there was not only an abundance of food but also an abundance of competitors for the food. These results suggest interplay between top-down and bottom-up processes which influence the interactions between avian predator species. We conclude that the common buzzard needs to balance the risks of IG predation and interference competition with the availability of its own resources. The presence of other predators associated with high food levels may impede a subordinate predator taking full advantage of the available food. Based on our results, it appears that interspecific interactions with dominant predators have the potential to influence the distribution pattern of subordinate predators.
Bird-of-prey, Competitive Behavior, Food Chain, Forests, dominance, Predator avoidance, Species Specificity, BARRED OWLS, INTERFERENCE COMPETITION, bird-of-prey, Animals, Interference competition, FIELD EXPERIMENTS, HABITAT, Dominance, BUZZARD BUTEO-BUTEO, Finland, COMMON BUZZARD, BOTTOM-UP, GOSHAWK ACCIPITER-GENTILIS, SPOTTED OWLS, food conflict, Food conflict, Strigiformes, interference competition, Hawks, Ecology, evolutionary biology, predator avoidance, Predatory Behavior, ta1181, TOP-DOWN
Bird-of-prey, Competitive Behavior, Food Chain, Forests, dominance, Predator avoidance, Species Specificity, BARRED OWLS, INTERFERENCE COMPETITION, bird-of-prey, Animals, Interference competition, FIELD EXPERIMENTS, HABITAT, Dominance, BUZZARD BUTEO-BUTEO, Finland, COMMON BUZZARD, BOTTOM-UP, GOSHAWK ACCIPITER-GENTILIS, SPOTTED OWLS, food conflict, Food conflict, Strigiformes, interference competition, Hawks, Ecology, evolutionary biology, predator avoidance, Predatory Behavior, ta1181, TOP-DOWN
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 21 | |
popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |