Climate-driven changes in the composition of New World plant communities

K. J. Feeley (), C. Bravo-Avila, B. Fadrique, T. M. Perez and D. Zuleta
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K. J. Feeley: University of Miami
C. Bravo-Avila: University of Miami
B. Fadrique: University of Miami
T. M. Perez: University of Miami
D. Zuleta: Universidad Nacional de Colombia Sede Medellín

Nature Climate Change, 2020, vol. 10, issue 10, 965-970

Abstract: Abstract Climate change is altering the distributions of species, which in turn causes shifts in the composition of plant communities. Specifically, rising temperatures should cause increasing relative abundances of heat-loving or heat-tolerant species (that is, ‘thermophilization’) and changes in precipitation should cause altered abundances of water-demanding species. We analysed millions of records of thousands of species and found that the plant communities in most ecoregions in North, Central and South America have experienced thermophilization over the past four decades (1970–2011). Thermophilization was fastest in ecoregions with intermediate temperatures and was positively correlated with warming rates within many biomes. Changes in the relative abundances of water-demanding species were less consistent and were not correlated with changes in precipitation, meaning that the drought sensitivity of some ecoregions may be increasing despite decreasing rainfall and increasing probabilities of drought. Climate-driven changes in plant community composition will affect the function and stability of New World ecoregions.

Date: 2020
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DOI: 10.1038/s41558-020-0873-2

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