Skip to main content
construction release_alert
Scholars@Duke will be undergoing maintenance April 11-15. Some features may be unavailable during this time.
cancel
Journal cover image

Variation in stochastic demography between and within central and peripheral regions in a widespread short-lived herb.

Publication ,  Journal Article
Villellas, J; Morris, WF; García, MB
Published in: Ecology
June 2013

Analyzing intraspecific variation in population dynamics in relation to environmental factors is crucial to understand the current and future distributions of plant species. Across ranges, peripheral populations are often expected to show lower and more temporally variable vital rates than central populations, although it remains unclear how much any differences in vital rates actually contribute to differences in population growth rates. Moreover, few demographic studies accounting for environmental stochasticity have been carried out both at continental and regional scales. In this study we calculated stochastic growth rates in five central and six northern peripheral populations of the widespread shortlived herb Plantago coronopus along the Atlantic Coast in Europe. To evaluate at two spatial scales how mean values and variability of vital rates (i.e., fecundity, recruitment, survival, growth, and shrinkage) contributed to the differences in stochastic growth rates, we performed Stochastic Life Table Response Experiment (SLTRE) analyses between and within central and peripheral regions. Additionally, we searched for correlations between vital rate contributions and local environmental conditions. Lower mean values and greater variability for some vital rates in peripheral than in central populations had an overall negative but nonsignificant effect on the stochastic growth rates in the periphery. Different life cycle components accounted for differences in population growth depending on spatial scale, although recruitment was the vital rate with the highest influence both between and within regions. Interestingly, the same pattern of differentiation among populations was found within central and peripheral areas: in both regions, one group of populations displayed positive contributions of growth and shrinkage and negative contributions of recruitment and survival; the opposite pattern was found in the remaining populations. These differences in vital rate contributions among populations within regions were correlated with precipitation regime, whereas at the continental scale, differences in contribution patterns were related to temperature. Altogether, our results show how populations of P. coronopus exhibit life cycle differences that may enable the species to persist in locations with widely varying environmental conditions. This demographic flexibility may help to explain the success of widespread plants across large and heterogeneous ranges.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Ecology

DOI

EISSN

1939-9170

ISSN

1939-9170

Publication Date

June 2013

Volume

94

Issue

6

Start / End Page

1378 / 1388

Related Subject Headings

  • Stochastic Processes
  • Plantago
  • Models, Biological
  • Life Tables
  • Europe
  • Ecology
  • Demography
  • Asia
  • Africa
  • 4102 Ecological applications
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Villellas, J., Morris, W. F., & García, M. B. (2013). Variation in stochastic demography between and within central and peripheral regions in a widespread short-lived herb. Ecology, 94(6), 1378–1388. https://doi.org/10.1890/12-1163.1
Villellas, Jesús, William F. Morris, and María B. García. “Variation in stochastic demography between and within central and peripheral regions in a widespread short-lived herb.Ecology 94, no. 6 (June 2013): 1378–88. https://doi.org/10.1890/12-1163.1.
Villellas, Jesús, et al. “Variation in stochastic demography between and within central and peripheral regions in a widespread short-lived herb.Ecology, vol. 94, no. 6, June 2013, pp. 1378–88. Epmc, doi:10.1890/12-1163.1.
Journal cover image

Published In

Ecology

DOI

EISSN

1939-9170

ISSN

1939-9170

Publication Date

June 2013

Volume

94

Issue

6

Start / End Page

1378 / 1388

Related Subject Headings

  • Stochastic Processes
  • Plantago
  • Models, Biological
  • Life Tables
  • Europe
  • Ecology
  • Demography
  • Asia
  • Africa
  • 4102 Ecological applications