Advanced

Linking vital rates to invasiveness of a perennial herb

Ramula, Satu LU (2014) In Oecologia 174(4). p.1255-1264
Abstract
Invaders generally show better individual performance than non-invaders and, therefore, vital rates (survival, growth, fecundity) could potentially be used to predict species invasiveness outside their native range. Comparative studies have usually correlated vital rates with the invasiveness status of species, while few studies have investigated them in relation to population growth rate. Here, I examined the influence of five vital rates (plant establishment, survival, growth, flowering probability, seed production) and their variability (across geographic regions, habitat types, population sizes and population densities) on population growth rate (lambda) using data from 37 populations of an invasive, iteroparous herb (Lupinus... (More)
Invaders generally show better individual performance than non-invaders and, therefore, vital rates (survival, growth, fecundity) could potentially be used to predict species invasiveness outside their native range. Comparative studies have usually correlated vital rates with the invasiveness status of species, while few studies have investigated them in relation to population growth rate. Here, I examined the influence of five vital rates (plant establishment, survival, growth, flowering probability, seed production) and their variability (across geographic regions, habitat types, population sizes and population densities) on population growth rate (lambda) using data from 37 populations of an invasive, iteroparous herb (Lupinus polyphyllus) in a part of its invaded range in Finland. Variation in vital rates was often related to habitat type and population density. The performance of the populations varied from declining to rapidly increasing independently of habitat type, population size or population density, but differed between regions. The population growth rate increased linearly with plant establishment, and with the survival and growth of vegetative individuals, while the survival of flowering individuals and annual seed production were not related to lambda. The vital rates responsible for rapid population growth varied among populations. These findings highlight the importance of both regional and local conditions to plant population dynamics, demonstrating that individual vital rates do not necessarily correlate with lambda. Therefore, to understand the role of individual vital rates in a species ability to invade, it is necessary to quantify their effect on population growth rate. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Demography, Fitness, Invasion ecology, Population dynamics, Population, growth rate
in
Oecologia
volume
174
issue
4
pages
1255 - 1264
publisher
Springer
external identifiers
  • wos:000333171400018
  • scopus:84896317992
ISSN
1432-1939
DOI
10.1007/s00442-013-2869-3
language
English
LU publication?
yes
id
7714785a-f27f-4bd5-abb1-a2dd0d52b0e2 (old id 4407557)
date added to LUP
2014-04-29 09:19:42
date last changed
2017-09-24 04:02:39
@article{7714785a-f27f-4bd5-abb1-a2dd0d52b0e2,
  abstract     = {Invaders generally show better individual performance than non-invaders and, therefore, vital rates (survival, growth, fecundity) could potentially be used to predict species invasiveness outside their native range. Comparative studies have usually correlated vital rates with the invasiveness status of species, while few studies have investigated them in relation to population growth rate. Here, I examined the influence of five vital rates (plant establishment, survival, growth, flowering probability, seed production) and their variability (across geographic regions, habitat types, population sizes and population densities) on population growth rate (lambda) using data from 37 populations of an invasive, iteroparous herb (Lupinus polyphyllus) in a part of its invaded range in Finland. Variation in vital rates was often related to habitat type and population density. The performance of the populations varied from declining to rapidly increasing independently of habitat type, population size or population density, but differed between regions. The population growth rate increased linearly with plant establishment, and with the survival and growth of vegetative individuals, while the survival of flowering individuals and annual seed production were not related to lambda. The vital rates responsible for rapid population growth varied among populations. These findings highlight the importance of both regional and local conditions to plant population dynamics, demonstrating that individual vital rates do not necessarily correlate with lambda. Therefore, to understand the role of individual vital rates in a species ability to invade, it is necessary to quantify their effect on population growth rate.},
  author       = {Ramula, Satu},
  issn         = {1432-1939},
  keyword      = {Demography,Fitness,Invasion ecology,Population dynamics,Population,growth rate},
  language     = {eng},
  number       = {4},
  pages        = {1255--1264},
  publisher    = {Springer},
  series       = {Oecologia},
  title        = {Linking vital rates to invasiveness of a perennial herb},
  url          = {http://dx.doi.org/10.1007/s00442-013-2869-3},
  volume       = {174},
  year         = {2014},
}