Density, Climate, and Stochasticity Shape Four Centuries of Population Dynamics for Two Long-Lived Tree Species.

Autor: Waddle E; Department of Ecology and Evolutionary Biology University of Colorado Boulder Boulder Colorado USA., Lesser MR; Center for Earth and Environmental Science SUNY Plattsburgh Plattsburgh New York USA., Steenbock C; Department of Ecology and Evolutionary Biology University of Colorado Boulder Boulder Colorado USA., Doak DF; Department of Environmental Studies University of Colorado Boulder Boulder Colorado USA.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2024 Dec 15; Vol. 14 (12), pp. e70664. Date of Electronic Publication: 2024 Dec 15 (Print Publication: 2024).
DOI: 10.1002/ece3.70664
Abstrakt: The dynamics of colonizing populations may be strongly influenced by both extrinsic (e.g., climate and competition) and intrinsic (e.g., density) forces as well as demographic and environmental stochasticity. Understanding the impacts of these effects is crucial for predicting range expansions, trailing edge dynamics, and the viability of rare species, but the general importance of each of these forces remains unclear. Here, we assemble establishment time and spatial locations of most individuals that have reached maturity in six isolated, establishing populations of two pine species. These data allow us to quantify the relative importance of multiple factors in controlling growth of these populations. We found that climate, density, site, and demographic stochasticity were of varying importance both within and across species, but that no driver appeared to dominate dynamics across all populations and time periods. Indeed, exclusion of any one of these effects greatly reduced predictive power of our population growth models. Given the similarity in the abiotic characteristics of these sites, the varying importance of these classes of effects was surprising but speaks to the need to consider multiple effects when predicting the dynamics of small and colonizing populations.
Competing Interests: The authors declare no conflicts of interest.
(© 2024 The Author(s). Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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