Advanced

The origin of polymorphic crypsis in a heterogeneous environment

Holmér, Jennie LU and Ripa, Jörgen LU (2010) In Evolution 64. p.1386-1394
Abstract
ABSTRACT Polymorphic crypsis has been observed in several taxa, but has, until now, lacked a firm theoretical understanding. How does a single morph, well camouflaged in one type of habitat, evolve crypsis in another, not isolated, habitat? We here analyze a model of one prey species living in two different habitats connected by passive dispersal. We find that the rate of dispersal, the trade-off between crypticity in the habitats, and the amount of predation determines whether the prey species can become cryptic in two different habitats through evolutionary branching. Intermediate values of all parameters seem to promote evolutionary branching leading to polymorphism, and a more extreme value of one parameter can be balanced by another.... (More)
ABSTRACT Polymorphic crypsis has been observed in several taxa, but has, until now, lacked a firm theoretical understanding. How does a single morph, well camouflaged in one type of habitat, evolve crypsis in another, not isolated, habitat? We here analyze a model of one prey species living in two different habitats connected by passive dispersal. We find that the rate of dispersal, the trade-off between crypticity in the habitats, and the amount of predation determines whether the prey species can become cryptic in two different habitats through evolutionary branching. Intermediate values of all parameters seem to promote evolutionary branching leading to polymorphism, and a more extreme value of one parameter can be balanced by another. Other parameter combinations lead to either a single habitat specialist or an intermediate generalist type, partly cryptic in both habitat. When the predator follows a type III functional response the parameter space for when the prey will undergo evolutionary branching is remarkably larger than the corresponding parameter space for a type II functional response. Evolutionary branching can occur both at the intermediate generalist strategy, or close to a specialist strategy. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Evolution
volume
64
pages
1386 - 1394
publisher
Wiley-Blackwell
external identifiers
  • wos:000277096400018
  • scopus:77953755987
ISSN
1558-5646
DOI
10.1111/j.1558-5646.2009.00918.x
language
English
LU publication?
yes
id
810a8de5-3409-45d4-a999-8c4e9f76744a (old id 1523665)
date added to LUP
2010-01-15 10:13:27
date last changed
2018-05-29 09:48:40
@article{810a8de5-3409-45d4-a999-8c4e9f76744a,
  abstract     = {ABSTRACT Polymorphic crypsis has been observed in several taxa, but has, until now, lacked a firm theoretical understanding. How does a single morph, well camouflaged in one type of habitat, evolve crypsis in another, not isolated, habitat? We here analyze a model of one prey species living in two different habitats connected by passive dispersal. We find that the rate of dispersal, the trade-off between crypticity in the habitats, and the amount of predation determines whether the prey species can become cryptic in two different habitats through evolutionary branching. Intermediate values of all parameters seem to promote evolutionary branching leading to polymorphism, and a more extreme value of one parameter can be balanced by another. Other parameter combinations lead to either a single habitat specialist or an intermediate generalist type, partly cryptic in both habitat. When the predator follows a type III functional response the parameter space for when the prey will undergo evolutionary branching is remarkably larger than the corresponding parameter space for a type II functional response. Evolutionary branching can occur both at the intermediate generalist strategy, or close to a specialist strategy.},
  author       = {Holmér, Jennie and Ripa, Jörgen},
  issn         = {1558-5646},
  language     = {eng},
  pages        = {1386--1394},
  publisher    = {Wiley-Blackwell},
  series       = {Evolution},
  title        = {The origin of polymorphic crypsis in a heterogeneous environment},
  url          = {http://dx.doi.org/10.1111/j.1558-5646.2009.00918.x},
  volume       = {64},
  year         = {2010},
}