BROWSE

Related Researcher

Author

Tlusty, Tsvi
Living and Soft Matter Theory Group
Research Interests
  • Systems biology, non-equilibrium physics, physical biology, molecular information, proteins

ITEM VIEW & DOWNLOAD

Where Two Are Fighting, the Third Wins: Stronger Selection Facilitates Greater Polymorphism in Traits Conferring Competition-Dispersal Tradeoffs

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Where Two Are Fighting, the Third Wins: Stronger Selection Facilitates Greater Polymorphism in Traits Conferring Competition-Dispersal Tradeoffs
Author
Tlusty, Tsvi(Lampert, Adam
Keywords
INTRASPECIFIC COMPETITION; SYMPATRIC SPECIATION; EPHEMERAL RESOURCE; EVOLUTION; COOPERATION; DYNAMICS; MODELS; SIZE; BIODIVERSITY; COEXISTENCE
Issue Date
201602
Publisher
PUBLIC LIBRARY SCIENCE
Citation
PLOS ONE , v.11, no.2, pp.e0147970 -
Abstract
A major conundrum in evolution is that, despite natural selection, polymorphism is still omnipresent in nature: Numerous species exhibit multiple morphs, namely several abundant values of an important trait. Polymorphism is particularly prevalent in asymmetric traits, which are beneficial to their carrier in disruptive competitive interference but at the same time bear disadvantages in other aspects, such as greater mortality or lower fecundity. Here we focus on asymmetric traits in which a better competitor disperses fewer offspring in the absence of competition. We report a general pattern in which polymorphic populations emerge when disruptive selection increases: The stronger the selection, the greater the number of morphs that evolve. This pattern is general and is insensitive to the form of the fitness function. The pattern is somewhat counterintuitive since directional selection is excepted to sharpen the trait distribution and thereby reduce its diversity (but note that similar patterns were suggested in studies that demonstrated increased biodiversity as local selection increases in ecological communities). We explain the underlying mechanism in which stronger selection drives the population towards more competitive values of the trait, which in turn reduces the population density, thereby enabling lesser competitors to stably persist with reduced need to directly compete. Thus, we believe that the pattern is more general and may apply to asymmetric traits more broadly. This robust pattern suggests a comparative, unified explanation to a variety of polymorphic traits in nature.
URI
Go to Link
DOI
http://dx.doi.org/10.1371/journal.pone.0147970
ISSN
1932-6203
Appears in Collections:
SNS_Journal Papers
Files in This Item:
000369552800023.PDFDownload

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU