Evolution of resource competition between mutually dependent digital organisms
Evolution of resource competition between mutually dependent digital organisms
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DOI：
10.1162/106454604773563577
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发表时间：
2004-03-01
期刊：
影响因子：
2.6
通讯作者：
Wilke, CO
中科院分区：
文献类型：
--
作者：
Johnson, TJ;Wilke, CO
我们研究的出现和动态竞争菌株的数字生物在世界上有两个可消耗的资源。一种资源的消耗会产生另一种资源的副产品，反之亦然。结果，出现了两种相互依赖的生物，每一种猎物都以另一种猎物的废物为食。在没有突变的情况下，即在纯粹的生态环境中，两种生物的丰度表现出广泛的不同类型的振荡，从振幅较大的规则振荡到振幅从小到大的不规则振荡。在这种情况下，时间平均丰度水平似乎是由缺乏资源的生物体的相对适合度控制的。另一方面，在突变压力下，种群的进化似乎避免了中大振幅的振荡。在这种情况下，生物在资源存在下的相对适合度在时间平均丰度水平中也起着重要作用。
We study the emergence and dynamics of competing strains of digital organisms in a world with two depletable resources. Consumption of one resource produces the other resource as a by-product, and vice versa. As a consequence, two types of mutually dependent organisms emerge that each prey oil the waste product of the other. In the absence of mutations, that is, in a purely ecological setting, the abundances of the two types of organisms display a wide range of different types of oscillations, from regular oscillations with large amplitude to irregular oscillations with amplitudes ranging from small to large. In this regime, time-averaged abundance levels seem to be controlled by the relative fitness of the organisms in the absence Of resources. Under mutational pressure, on the other hand, populations evolve that seem to avoid the oscillations of intermediate to large amplitudes. In this case, the relative fitness of the organisms in the presence of resources plays an important role in the time-averaged abundance levels as well.