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Article Dans Une Revue Global Ecology and Biogeography Année : 2022

Bioclimatic context of species' populations determines community stability

Luke Christopher Evans
Yolanda Melero
Reto Schmucki
Philipp H Boersch‐supan
Lluís Brotons
  • Fonction : Auteur
Frédéric Jiguet
Mikko Kuussaari
  • Fonction : Auteur
Dario Massimino
  • Fonction : Auteur
Robert A Robinson
  • Fonction : Auteur
David B Roy
  • Fonction : Auteur
Oliver Schweiger
  • Fonction : Auteur
Josef Settele
  • Fonction : Auteur
Constanti Stefanescu
  • Fonction : Auteur
Chris a M van Turnhout
  • Fonction : Auteur
Tom Henry Oliver
  • Fonction : Auteur

Résumé

Aim: It is important to understand the factors affecting community stability because ecosystem function is increasingly at risk from biodiversity loss. Here, we evaluate how a key factor, the position of local environmental conditions within the thermal range of the species, influences the stability of butterfly communities at a continental scale. Location: Spain, UK and Finland. Time period: 1999–2017. Major taxa studied: Butterflies. Methods: We tested the following hypotheses about how species responses to temperature anomalies aggregate to influence stability: Hypothesis 1, species have contrasting responses to local temperature anomalies at opposing edges of their thermal range; hypothesis 2, communities with central thermal range positions have higher community stability; and the impacts of thermal range position on community stability are driven by hypothesis 3, population asynchrony, or hypothesis 4, additive population stability. Data were analysed at 876 sites for 157 species. Results: We found some support for hypothesis 1, because there were interactions between thermal range and response to temperature anomalies such that species at different range edges could provide weak compensatory dynamics. However, responses were nonlinear, suggesting strong declines with extreme anomalies, particularly at the hot range edge. Hypothesis 2 was supported in part, because community stability increased with central thermal range positions and declined at the edges, after accounting for species richness and community abundance. Thermal range position was weakly correlated with asynchrony (hypothesis 3) and population stability (hypothesis 4), although species richness and population abundance had larger impacts.
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Dates et versions

hal-03766966 , version 1 (01-09-2022)

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Luke Christopher Evans, Yolanda Melero, Reto Schmucki, Philipp H Boersch‐supan, Lluís Brotons, et al.. Bioclimatic context of species' populations determines community stability. Global Ecology and Biogeography, 2022, 31, pp.1542 - 1555. ⟨10.1111/geb.13527⟩. ⟨hal-03766966⟩
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