A biome-dependent distribution gradient of tree species range edges is strongly dictated by climate spatial heterogeneity

David Lerner*, Marcos Fernández Martínez, Stav Livne-Luzon, Jonathan Belmaker, Josep Peñuelas, Tamir Klein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Understanding the causes of the arrest of species distributions has been a fundamental question in ecology and evolution. These questions are of particular interest for trees owing to their long lifespan and sessile nature. A surge in data availability evokes a macro-ecological analysis to determine the underlying forces limiting distributions. Here we analyse the spatial distribution of >3,600 major tree species to determine geographical areas of range-edge hotspots and find drivers for their arrest. We confirmed biome edges to be strong delineators of distributions. Importantly, we identified a stronger contribution of temperate than tropical biomes to range edges, adding strength to the notion that tropical areas are centres of radiation. We subsequently identified a strong association of range-edge hotspots with steep spatial climatic gradients. We linked spatial and temporal homogeneity and high potential evapotranspiration in the tropics as the strongest predictors of this phenomenon. We propose that the poleward migration of species in light of climate change might be hindered because of steep climatic gradients.

Original languageEnglish
Pages (from-to)544-553
Number of pages10
JournalNature Plants
Volume9
Issue number4
DOIs
StatePublished - Apr 2023

Funding

FundersFunder number
EU/PRTR
Estate of Helen NichunskyPID2019-110521GB-I00, TED2021-132627B-I00
Ministry for Science and InnovationAEI/10.13039/501100011033
Tom Beck-Canadian Center for Alternative Energy Research
“la Caixa” Foundation100010434, LCF/BQ/PI21/11830010
Masonic Charitable Foundation
‘la Caixa’ Foundation

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