EVOLUTION OF GENERALISTS AND SPECIALISTS IN SPATIALLY HETEROGENEOUS ENVIRONMENTS - PubMed (original) (raw)
EVOLUTION OF GENERALISTS AND SPECIALISTS IN SPATIALLY HETEROGENEOUS ENVIRONMENTS
Peter H Van Tienderen. Evolution. 1991 Sep.
Abstract
Quantitative genetic models are used to investigate the evolution of generalists and specialists in a coarse-grained environment with two habitat types when there are costs attached to being a generalist. The outcomes for soft and hard selection models are qualitatively different. Under soft selection (e.g., for juvenile or male-reproductive traits) the population evolves towards the single peak in the adaptive landscape. At equilibrium, the population mean phenotype is a compromise between the reaction that would be optimal in both habitats and the reaction with the lowest cost. Furthermore, the equilibrium is closer to the optimal phenotype in the most frequent habitat, or the habitat in which selection on the focal trait is stronger. A specialist genotype always has a lower fitness than a generalist, even when the costs are high. In contrast, under hard selection (e.g., for adult or female-reproductive traits) the adaptive landscape can have one, two, or three peaks; a peak represents a population specialized to one habitat, equally adapted to both habitats, or an intermediate. One peak is always found when the reaction with the lowest cost is not much different from the optimal reaction, and this situation is similar to the soft selection case. However, multiple peaks are present when the costs become higher, and the course of evolution is then determined by initial conditions, and the region of attraction of each peak. This implies that the evolution of specialization and phenotypic plasticity may not only depend on selection regimes within habitats, but also on contingent, historical events (migration, mutation). Furthermore, the evolutionary dynamics in changing environments can be widely different for populations under hard and soft selection. Approaches to measure costs in natural and experimental populations are discussed.
Keywords: Cost of adaptation; genotype-environment interaction; phenotypic plasticity; quantitative genetics.
© 1991 The Society for the Study of Evolution.
Similar articles
- GENERALISTS, SPECIALISTS, AND THE EVOLUTION OF PHENOTYPIC PLASTICITY IN SYMPATRIC POPULATIONS OF DISTINCT SPECIES.
van Tienderen PH. van Tienderen PH. Evolution. 1997 Oct;51(5):1372-1380. doi: 10.1111/j.1558-5646.1997.tb01460.x. Evolution. 1997. PMID: 28568610 - GENOTYPE-ENVIRONMENT INTERACTION AND THE EVOLUTION OF PHENOTYPIC PLASTICITY.
Via S, Lande R. Via S, et al. Evolution. 1985 May;39(3):505-522. doi: 10.1111/j.1558-5646.1985.tb00391.x. Evolution. 1985. PMID: 28561964 - Coexistence of habitat specialists and generalists in metapopulation models of multiple-habitat landscapes.
Nagelkerke CJ, Menken SB. Nagelkerke CJ, et al. Acta Biotheor. 2013 Dec;61(4):467-80. doi: 10.1007/s10441-013-9186-4. Epub 2013 Aug 13. Acta Biotheor. 2013. PMID: 23943092 - A critical review of adaptive genetic variation in Atlantic salmon: implications for conservation.
Garcia de Leaniz C, Fleming IA, Einum S, Verspoor E, Jordan WC, Consuegra S, Aubin-Horth N, Lajus D, Letcher BH, Youngson AF, Webb JH, Vøllestad LA, Villanueva B, Ferguson A, Quinn TP. Garcia de Leaniz C, et al. Biol Rev Camb Philos Soc. 2007 May;82(2):173-211. doi: 10.1111/j.1469-185X.2006.00004.x. Biol Rev Camb Philos Soc. 2007. PMID: 17437557 Review. - Quantifying the effects of migration and mutation on adaptation and demography in spatially heterogeneous environments.
Débarre F, Ronce O, Gandon S. Débarre F, et al. J Evol Biol. 2013 Jun;26(6):1185-202. doi: 10.1111/jeb.12132. Epub 2013 May 3. J Evol Biol. 2013. PMID: 23639097 Review.
Cited by
- Selection maintains a nonadaptive floral polyphenism.
Gómez JM, González-Megías A, Armas C, Narbona E, Navarro L, Perfectti F. Gómez JM, et al. Evol Lett. 2024 Apr 25;8(4):610-621. doi: 10.1093/evlett/qrae017. eCollection 2024 Aug. Evol Lett. 2024. PMID: 39100232 Free PMC article. - On the evolutionary origin of discrete phenotypic plasticity.
Sakamoto T, Innan H. Sakamoto T, et al. G3 (Bethesda). 2024 Sep 4;14(9):jkae144. doi: 10.1093/g3journal/jkae144. G3 (Bethesda). 2024. PMID: 38984708 Free PMC article. - Spatial and temporal heterogeneity alter the cost of plasticity in Pristionchus pacificus.
Kalirad A, Sommer RJ. Kalirad A, et al. PLoS Comput Biol. 2024 Jan 30;20(1):e1011823. doi: 10.1371/journal.pcbi.1011823. eCollection 2024 Jan. PLoS Comput Biol. 2024. PMID: 38289972 Free PMC article. - Radiation impacts gene redundancy and biofilm regulation of cryoconite microbiomes in Northern Hemisphere glaciers.
Zhang Z, Liu Y, Zhao W, Ji M. Zhang Z, et al. Microbiome. 2023 Oct 18;11(1):228. doi: 10.1186/s40168-023-01621-y. Microbiome. 2023. PMID: 37848997 Free PMC article. - Condition dependence and the paradox of missing plasticity costs.
De Lisle SP, Rowe L. De Lisle SP, et al. Evol Lett. 2023 Mar 20;7(2):67-78. doi: 10.1093/evlett/qrad009. eCollection 2023 Apr 1. Evol Lett. 2023. PMID: 37033877 Free PMC article.
LinkOut - more resources
Full Text Sources