Research

Multi-mode fluctuating selection in host-parasite coevolution


Reference:

Ashby, B. and Boots, M., 2017. Multi-mode fluctuating selection in host-parasite coevolution. Ecology Letters, 20 (3), pp. 357-365.

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      Official URL:

      https://doi.org/10.1111/ele.12734

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      Abstract

      Understanding fluctuating selection is important for our understanding of patterns of spatial and temporal diversity in nature. Host-parasite theory has classically assumed fluctuations either occur between highly specific genotypes (Matching Alleles: MA) or from specialism to generalism (Gene-for-Gene: GFG). However, while MA can only generate one mode of fluctuating selection, we show that GFG can in fact produce both rapid “within-range” fluctuations (among genotypes with identical levels of investment but which specialise on different subsets of the population) and slower cycling “between ranges” (different levels of investment), emphasising that MA is a subset of GFG. Our findings closely match empirical observations, although sampling rates need to be high to detect these novel dynamics empirically. Within-range cycling is an overlooked process by which fluctuating selection can occur in nature, suggesting that fluctuating selection may be a more common and important process than previously thought in generating and maintaining diversity.

      Details

      Item Type Articles
      CreatorsAshby, B.and Boots, M.
      DOI10.1111/ele.12734
      Related URLs
      URLURL Type
      https://doi.org/10.1111/ele.12734Free Full-text
      Uncontrolled Keywordshost-parasite systems,coevolution,fluctuating selection,infection genetics,ecology, evolution, behavior and systematics,applied mathematics
      DepartmentsFaculty of Science > Mathematical Sciences
      RefereedYes
      StatusPublished
      ID Code53637

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