Stephen R Proulx, Taom Sakal, Zach L Reitz, Kelly M Thomasson
{"title":"元种群中孢子策略的选择可导致共存。","authors":"Stephen R Proulx, Taom Sakal, Zach L Reitz, Kelly M Thomasson","doi":"10.1093/evolut/qpae161","DOIUrl":null,"url":null,"abstract":"<p><p>In constant environments, the coexistence of similar species or genotypes is generally limited. In a metapopulation context, however, types that utilize the same resource but are distributed along a competition-colonization trade-off can coexist. Prior work used a generic trade-off between within-deme competitive ability and between-deme dispersal ability. We show that sporulation in yeasts and other microbes can create a natural trade-off such that strains that initiate sporulation at higher rates suffer in terms of within-deme competition but benefit in terms of between deme dispersal. Using chemostat dynamics within patches, we first show that the rate of sporulation determines the colonization ability of the strain, with colonization ability increasing with sporulation rate up to a point. Metapopulation stability of a single strain exists in a defined range of sporulation rates. We pairwise invasability plots to show that coexistence of strains with different sporulation rates generally occurs, but that the set of sporulation rates that can potentially coexist is smaller than the set that allows for stable metapopulations. We also show how a continuous set of strains can coexist and verify our conclusions with numerical calculations and stochastic simulations. Stable variation in sporulation rates is expected under a wide range of ecological conditions.</p>","PeriodicalId":12082,"journal":{"name":"Evolution","volume":" ","pages":"249-260"},"PeriodicalIF":3.1000,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Selection on sporulation strategies in a metapopulation can lead to coexistence.\",\"authors\":\"Stephen R Proulx, Taom Sakal, Zach L Reitz, Kelly M Thomasson\",\"doi\":\"10.1093/evolut/qpae161\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>In constant environments, the coexistence of similar species or genotypes is generally limited. In a metapopulation context, however, types that utilize the same resource but are distributed along a competition-colonization trade-off can coexist. Prior work used a generic trade-off between within-deme competitive ability and between-deme dispersal ability. We show that sporulation in yeasts and other microbes can create a natural trade-off such that strains that initiate sporulation at higher rates suffer in terms of within-deme competition but benefit in terms of between deme dispersal. Using chemostat dynamics within patches, we first show that the rate of sporulation determines the colonization ability of the strain, with colonization ability increasing with sporulation rate up to a point. Metapopulation stability of a single strain exists in a defined range of sporulation rates. We pairwise invasability plots to show that coexistence of strains with different sporulation rates generally occurs, but that the set of sporulation rates that can potentially coexist is smaller than the set that allows for stable metapopulations. We also show how a continuous set of strains can coexist and verify our conclusions with numerical calculations and stochastic simulations. Stable variation in sporulation rates is expected under a wide range of ecological conditions.</p>\",\"PeriodicalId\":12082,\"journal\":{\"name\":\"Evolution\",\"volume\":\" \",\"pages\":\"249-260\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-02-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Evolution\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1093/evolut/qpae161\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Evolution","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1093/evolut/qpae161","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}
Selection on sporulation strategies in a metapopulation can lead to coexistence.
In constant environments, the coexistence of similar species or genotypes is generally limited. In a metapopulation context, however, types that utilize the same resource but are distributed along a competition-colonization trade-off can coexist. Prior work used a generic trade-off between within-deme competitive ability and between-deme dispersal ability. We show that sporulation in yeasts and other microbes can create a natural trade-off such that strains that initiate sporulation at higher rates suffer in terms of within-deme competition but benefit in terms of between deme dispersal. Using chemostat dynamics within patches, we first show that the rate of sporulation determines the colonization ability of the strain, with colonization ability increasing with sporulation rate up to a point. Metapopulation stability of a single strain exists in a defined range of sporulation rates. We pairwise invasability plots to show that coexistence of strains with different sporulation rates generally occurs, but that the set of sporulation rates that can potentially coexist is smaller than the set that allows for stable metapopulations. We also show how a continuous set of strains can coexist and verify our conclusions with numerical calculations and stochastic simulations. Stable variation in sporulation rates is expected under a wide range of ecological conditions.
期刊介绍:
Evolution, published for the Society for the Study of Evolution, is the premier publication devoted to the study of organic evolution and the integration of the various fields of science concerned with evolution. The journal presents significant and original results that extend our understanding of evolutionary phenomena and processes.