Lags in the response of mountain plant communities to climate change

Research output: Journal contributionsScientific review articlesResearch

Authors

  • Jake M. Alexander
  • Loïc Chalmandrier
  • Jonathan Lenoir
  • Treena I. Burgess
  • Franz Essl
  • Sylvia Haider
  • Christoph Kueffer
  • Keith McDougall
  • Ann Milbau
  • Martin A. Nuñez
  • Aníbal Pauchard
  • Wolfgang Rabitsch
  • Lisa J. Rew
  • Nathan J. Sanders
  • Loïc Pellissier

Rapid climatic changes and increasing human influence at high elevations around the world will have profound impacts on mountain biodiversity. However, forecasts from statistical models (e.g. species distribution models) rarely consider that plant community changes could substantially lag behind climatic changes, hindering our ability to make temporally realistic projections for the coming century. Indeed, the magnitudes of lags, and the relative importance of the different factors giving rise to them, remain poorly understood. We review evidence for three types of lag: “dispersal lags” affecting plant species’ spread along elevational gradients, “establishment lags” following their arrival in recipient communities, and “extinction lags” of resident species. Variation in lags is explained by variation among species in physiological and demographic responses, by effects of altered biotic interactions, and by aspects of the physical environment. Of these, altered biotic interactions could contribute substantially to establishment and extinction lags, yet impacts of biotic interactions on range dynamics are poorly understood. We develop a mechanistic community model to illustrate how species turnover in future communities might lag behind simple expectations based on species’ range shifts with unlimited dispersal. The model shows a combined contribution of altered biotic interactions and dispersal lags to plant community turnover along an elevational gradient following climate warming. Our review and simulation support the view that accounting for disequilibrium range dynamics will be essential for realistic forecasts of patterns of biodiversity under climate change, with implications for the conservation of mountain species and the ecosystem functions they provide.

Original languageEnglish
JournalGlobal Change Biology
Volume24
Issue number2
Pages (from-to)563-579
Number of pages17
ISSN1354-1013
DOIs
Publication statusPublished - 07.11.2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 John Wiley & Sons Ltd

DOI

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