No effect of intraspecific relatedness on public goods cooperation in a complex community.

No effect of intraspecific relatedness on public goods cooperation in a complex community.
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DOI:
10.1111/evo.13479
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发表时间:
2018-05
期刊:
Evolution; international journal of organic evolution
影响因子:
--
通讯作者:
Buckling A
Buckling A
中科院分区:
其他
文献类型:
--
作者:
O'Brien S;Hesse E;Luján A;Hodgson DJ;Gardner A;Buckling A

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许多有机体,特别是微生物,都是嵌入在复杂的群落中的,在那里,以排泄物的形式存在的合作行为可以使其他物种受益。在这种情况下,种内相互作用在推动合作的演变方面可能不那么重要。我们首先用一个简单的理论模型来说明这个想法,表明当物种之间共享公共物品时,相关性(具有相同合作等位基因的个体相互作用的程度)对合作进化的影响会降低。我们使用铜绿假单胞菌菌株进行经验性测试,这些菌株在铜污染的堆肥(一种间公共产品)中产生金属螯合铁载体。我们发现,nonsiderophore生产者生长不良,相对于生产者在高相关性,但这种成本可以减轻的存在下的同基因生产者(低相关性)和/或堆肥微生物群落。因此,当公共物品提供种间利益时,相关性可能变得不重要。
Many organisms—notably microbes—are embedded within complex communities where cooperative behaviors in the form of excreted public goods can benefit other species. Under such circumstances, intraspecific interactions are likely to be less important in driving the evolution of cooperation. We first illustrate this idea with a simple theoretical model, showing that relatedness—the extent to which individuals with the same cooperative alleles interact with each other—has a reduced impact on the evolution of cooperation when public goods are shared between species. We test this empirically using strain of Pseudomonas aeruginosa that vary in their production of metal‐chelating siderophores in copper contaminated compost (an interspecific public good). We show that nonsiderophore producers grow poorly relative to producers under high relatedness, but this cost can be alleviated by the presence of the isogenic producer (low relatedness) and/or the compost microbial community. Hence, relatedness can become unimportant when public goods provide interspecific benefits.
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