Distributing Defenses: How Resource Defendability Shapes the Optimal Response to Risk
Distributing Defenses: How Resource Defendability Shapes the Optimal Response to Risk
复制标题
分配防御:资源防御性如何塑造对风险的最佳响应
DOI:
10.1086/718715
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Dornhaus, Anna
中科院分区:
文献类型:
--
作者:
Donaldson-Matasci, Matina C.;Powell, Scott;Dornhaus, Anna
Many organisms divide limited defenses among heterogeneous assets. Plants allocate defensive chemicals among tissues differing in value, cost of defense, and risk of herbivory. Some ant colonies allocate specialized defenders among multiple nests differing in volume, entrance size, and risk of attack. We develop a general mathematical model to determine the optimal strategy for dividing defenses among assets depending on their value, defendability, and risk of attack. We build on plant defense theory by focusing on defendability, which we define as the functional relationship between defensive investment and successful defense. We show that if hard-to-defend assets cost more to defend, as assumed in resource defense theory, the optimal strategy allocates more defenses to those assets, regardless of risk. Inspired by cavity-nesting ants, we also consider the possibility that hard-to-defend assets have a lower chance to be successfully defended, even when defensive investment is high. Under this assumption, the optimal response to elevated risk is to reduce defensive allocation to hard-to-defend assets, a conservative strategy previously observed in turtle ants (Cephalotes). This new perspective on defendability suggests that in systems where assets differ in the chance of successful defense, defensive strategies may evolve to be sensitive to risk in surprising ways.
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影响因子:
2.3
作者:
J. Mitani;P. Rodman
通讯作者:
P. Rodman
DOI:
--
发表时间:
2020
影响因子:
11.1
作者:
S. Powell;S. Price;D. Kronauer
通讯作者:
D. Kronauer
影响因子:
2.2
作者:
C. Tanner
通讯作者:
C. Tanner
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
F. Wäckers;Claire Bonifay
通讯作者:
Claire Bonifay
影响因子:
2.1
作者:
Hassall, M;Walters, RJ;Hassall, MRJ
通讯作者:
Hassall, MRJ