Harvesting can stabilise population fluctuations and buffer the impacts of extreme climatic events - Archive ouverte HAL Access content directly
Journal Articles Ecology Letters Year : 2022

Harvesting can stabilise population fluctuations and buffer the impacts of extreme climatic events

Abstract

Harvesting can magnify the destabilising effects of environmental perturbations on population dynamics and, thereby, increase extinction risk. However, population-dynamic theory predicts that impacts of harvesting depend on the type and strength of density-dependent regulation. Here, we used logistic population growth models and an empirical reindeer case study to show that low to moderate harvesting can actually buffer populations against environmental perturbations. This occurs because of density-dependent environmental stochasticity, where negative environmental impacts on vital rates are amplified at high population density due to intra-specific resource competition. Simulations from our population models show that even low levels of harvesting may prevent overabundance, thereby dampening population fluctuations and reducing the risk of population collapse and quasi-extinction following environmental perturbations. Thus, depending on the species' life history and the strength of density-dependent environmental drivers, low to moderate harvesting can improve population resistance to increased climate variability and extreme weather expected under global warming
Fichier principal
Vignette du fichier
Peeters et al. 2022.pdf (1013.35 Ko) Télécharger le fichier
Origin : Explicit agreement for this submission

Dates and versions

hal-03550898 , version 1 (14-12-2023)

Identifiers

Cite

Bart Peeters, Vidar Grøtan, Marlène Gamelon, Vebjørn Veiberg, Aline m. Lee, et al.. Harvesting can stabilise population fluctuations and buffer the impacts of extreme climatic events. Ecology Letters, 2022, 25 (4), pp.863-875. ⟨10.1111/ele.13963⟩. ⟨hal-03550898⟩
64 View
17 Download

Altmetric

Share

Gmail Facebook X LinkedIn More