Resource supply and the evolution of public-goods cooperation in bacteria.

Resource supply and the evolution of public-goods cooperation in bacteria.
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DOI:
10.1186/1741-7007-6-20
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发表时间:
2008-05-14
期刊:
影响因子:
5.4
通讯作者:
Gardner A
Gardner A
中科院分区:
生物学2区
文献类型:
--
作者:
Brockhurst MA;Buckling A;Racey D;Gardner A

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解释公共产品合作是进化生物学的一个挑战。然而,如果费用较低,预计合作将更容易发展。随着资源供应量的增加,这种合作成本预计会下降,而资源供应量是一个在性质上差异很大的生态参数。我们实验测试的影响,资源供应的演变合作使用两个研究良好的细菌公益性状:生物膜形成的荧光假单胞菌和铁载体生产的铜绿假单胞菌。在两种细菌的公益性状的背景下,合作细菌的频率随着资源供应而增加。在这两种情况下,这都是由于随着资源供应的增加,对公益合作的投资成本下降。我们对细菌的实证检验表明,由于合作成本降低,公共产品合作可能会随着资源供应的增加而增加,这证实了资源供应是合作演变的一个重要因素。
Explaining public-goods cooperation is a challenge for evolutionary biology. However, cooperation is expected to more readily evolve if it imposes a smaller cost. Such costs of cooperation are expected to decline with increasing resource supply, an ecological parameter that varies widely in nature. We experimentally tested the effect of resource supply on the evolution of cooperation using two well-studied bacterial public-good traits: biofilm formation by Pseudomonas fluorescens and siderophore production by Pseudomonas aeruginosa. The frequency of cooperative bacteria increased with resource supply in the context of both bacterial public-good traits. In both cases this was due to decreasing costs of investment into public-goods cooperation with increasing resource supply. Our empirical tests with bacteria suggest that public-goods cooperation is likely to increase with increasing resource supply due to reduced costs of cooperation, confirming that resource supply is an important factor in the evolution of cooperation.
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