The effects of intraspecific and interspecific diversity on food web stability
The effects of intraspecific and interspecific diversity on food web stability
复制标题
种内和种间多样性对食物网稳定性的影响
DOI:
10.1007/s12080-020-00460-z
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发表时间:
2020
影响因子:
1.6
通讯作者:
Gouhier, Tarik C.
中科院分区:
文献类型:
--
作者:
Noto, Akana E.;Gouhier, Tarik C.
Although the effects of species diversity on food web stability have long been recognized, relatively little is known about the influence of intraspecific diversity. Empirical work has found that intraspecific diversity can increase community resilience and resistance, but few theoretical studies have attempted to use modeling approaches to determine how intraspecific diversity will affect food web stability. To begin to address this knowledge gap, we added intraspecific diversity to May’s classic random food web model. We found that, like species diversity, intraspecific diversity decreased stability. These effects on stability were not simply attributable to changes in interaction strengths, suggesting that intraspecific diversity can have its own independent effects on stability. Its effect depends on the relationship between inter- and intra-genotype interactions; when competition within genotypes was stronger than among them, food webs were generally more stable than when the converse was true. Overall, our model suggests that determining the direction and the magnitude of intraspecific diversity’s effects on stability in natural systems will require more empirical information about how its inclusion alters patterns of interaction strength and food web topology.
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DOI:
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发表时间:
2003
期刊:
影响因子:
--
作者:
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1999
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