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Less favourable climates constrain demographic strategies in plants

Identifieur interne : 000897 ( Main/Exploration ); précédent : 000896; suivant : 000898

Less favourable climates constrain demographic strategies in plants

Auteurs : Anna M. Cserg ; Roberto Salguero-G Mez ; Olivier Broennimann ; Shaun R. Coutts ; Antoine Guisan ; Amy L. Angert ; Erik Welk ; Iain Stott ; Brian J. Enquist ; Brian Mcgill ; Jens-Christian Svenning ; Cyrille Violle ; Yvonne M. Buckley

Source :

RBID : PMC:5575490

Abstract

Abstract

Correlative species distribution models are based on the observed relationship between species’ occurrence and macroclimate or other environmental variables. In climates predicted less favourable populations are expected to decline, and in favourable climates they are expected to persist. However, little comparative empirical support exists for a relationship between predicted climate suitability and population performance. We found that the performance of 93 populations of 34 plant species worldwide – as measured by in situ population growth rate, its temporal variation and extinction risk – was not correlated with climate suitability. However, correlations of demographic processes underpinning population performance with climate suitability indicated both resistance and vulnerability pathways of population responses to climate: in less suitable climates, plants experienced greater retrogression (resistance pathway) and greater variability in some demographic rates (vulnerability pathway). While a range of demographic strategies occur within species’ climatic niches, demographic strategies are more constrained in climates predicted to be less suitable.


Url:
DOI: 10.1111/ele.12794
PubMed: 28609810
PubMed Central: 5575490


Affiliations:


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