Size-Dependent Intraguild Predation, Cannibalism, and Resource Allocation Determine the Outcome of Species Coexistence
Size-Dependent Intraguild Predation, Cannibalism, and Resource Allocation Determine the Outcome of Species Coexistence
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大小相关的行会内捕食、同类相食和资源分配决定了物种共存的结果
DOI:
10.1086/723600
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Travis, Joseph
中科院分区:
文献类型:
--
作者:
Bassar, Ronald D.;Coulson, Tim;Travis, Joseph
Intraguild predation (IGP), a system in which species compete for resources and prey on each other, is more common than existing theory predicts. In theory, an IG predator and its prey can coexist if the IG predator is a weaker competitor for a shared resource and the predator directly benefits from consuming the prey. However, many species that are IG predators also consume members of their own species (cannibalism). Here, we ask whether cannibalism can help resolve the paradox of IGP systems. Our approach differs from previous work on IGP and cannibalism by explicitly considering the size dependence of predatory interactions and how the benefits of predation are allocated to survival, growth, and fecundity of the predator or cannibal. Our results show that cannibalism facilitates coexistence under conditions that are opposite of those predicted by standard IGP theory: species can coexist when the cannibal is a better competitor on the shared resources, directly benefits little from consuming conspecifics, and allocates resources from predation more toward growth and fecundity over survival. Because the effects of IGP and cannibalism are opposite, when an IGP predator is also a cannibal, coexistence between the IGP predator and its prey is not possible and instead depends on the operation of other coexistence mechanisms (e.g., resource partitioning). These results point to the importance of understanding the relative rates of IGP and cannibalism as well as the resource allocation strategy of the IG predator in determining the likelihood of species coexistence.
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DOI:
10.1101/119446
发表时间:
2017
期刊:
bioRxiv
影响因子:
--
作者:
R. Bassar;J. Travis;T. Coulson
通讯作者:
T. Coulson
影响因子:
4.8
作者:
T. Potter;L. King;J. Travis;R. Bassar
通讯作者:
R. Bassar
DOI:
10.1086/587517
发表时间:
2008
期刊:
The American Naturalist
影响因子:
--
作者:
Jason D. Moll;Joel s. Brown
通讯作者:
Joel s. Brown
影响因子:
2.9
作者:
Benjamin J. Toscano;V. Hin;V. Rudolf
通讯作者:
V. Rudolf
影响因子:
2.9
作者:
J. Ohlberger;Ø. Langangen;N. Stenseth;L. A. Vøllestad
通讯作者:
L. A. Vøllestad