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On the importance of life history and age structure in biological invasions

Järemo, Johannes LU and Bengtsson, Göran LU (2011) In Ecological Modelling 222(3). p.485-492
Abstract
The age specific patterns of reproduction and mortality dictated by the life history of an organism apply to potential invaders as well as resident species of an area, but whether certain life history traits are more invasive than others is an unresolved issue. We analyze a two-population system of an invading and a resident species and test the effects of age on the probability to invade when the organisms are iteroparous or semelparous. The life history characteristics of the populations are projected in Leslie matrices, and the probability that the invader exceeds different population sizes is calculated by Monte Carlo analysis. The simulations show that (a) the invasion probability of an iteroparous organism increases with age until... (More)
The age specific patterns of reproduction and mortality dictated by the life history of an organism apply to potential invaders as well as resident species of an area, but whether certain life history traits are more invasive than others is an unresolved issue. We analyze a two-population system of an invading and a resident species and test the effects of age on the probability to invade when the organisms are iteroparous or semelparous. The life history characteristics of the populations are projected in Leslie matrices, and the probability that the invader exceeds different population sizes is calculated by Monte Carlo analysis. The simulations show that (a) the invasion probability of an iteroparous organism increases with age until the individuals introduced are mature for first reproduction, and then becomes independent of age; (b) the invasion probability is more age sensitive for iteroparous organisms with high juvenile mortality (Type III organisms) than for those with a lower (Type I); (c) invading semelparous organisms are most affected by competition from resident organisms; (d) variations in vital rates of semelparous residents have greater influence on the invasion probability of an iteroparous organism than variations in traits of the invader. (C) 2010 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Invasion, Life history, Age structure, Semelparous, Iteroparous
in
Ecological Modelling
volume
222
issue
3
pages
485 - 492
publisher
Elsevier
external identifiers
  • wos:000286782200011
  • scopus:78650677837
ISSN
0304-3800
DOI
10.1016/j.ecolmodel.2010.11.012
language
English
LU publication?
yes
id
f3b52b89-a9dc-401b-a5db-b9907839b6a2 (old id 1882633)
date added to LUP
2011-03-30 11:55:42
date last changed
2017-05-14 04:01:35
@article{f3b52b89-a9dc-401b-a5db-b9907839b6a2,
  abstract     = {The age specific patterns of reproduction and mortality dictated by the life history of an organism apply to potential invaders as well as resident species of an area, but whether certain life history traits are more invasive than others is an unresolved issue. We analyze a two-population system of an invading and a resident species and test the effects of age on the probability to invade when the organisms are iteroparous or semelparous. The life history characteristics of the populations are projected in Leslie matrices, and the probability that the invader exceeds different population sizes is calculated by Monte Carlo analysis. The simulations show that (a) the invasion probability of an iteroparous organism increases with age until the individuals introduced are mature for first reproduction, and then becomes independent of age; (b) the invasion probability is more age sensitive for iteroparous organisms with high juvenile mortality (Type III organisms) than for those with a lower (Type I); (c) invading semelparous organisms are most affected by competition from resident organisms; (d) variations in vital rates of semelparous residents have greater influence on the invasion probability of an iteroparous organism than variations in traits of the invader. (C) 2010 Elsevier B.V. All rights reserved.},
  author       = {Järemo, Johannes and Bengtsson, Göran},
  issn         = {0304-3800},
  keyword      = {Invasion,Life history,Age structure,Semelparous,Iteroparous},
  language     = {eng},
  number       = {3},
  pages        = {485--492},
  publisher    = {Elsevier},
  series       = {Ecological Modelling},
  title        = {On the importance of life history and age structure in biological invasions},
  url          = {http://dx.doi.org/10.1016/j.ecolmodel.2010.11.012},
  volume       = {222},
  year         = {2011},
}