Temperature shapes opposing latitudinal gradients of plant taxonomic and phylogenetic β diversity

Ian R. McFadden, Brody Sandel, Constantinos Tsirogiannis, Naia Morueta-Holme, Jens Christian Svenning, Brian Enquist, Nathan J.B. Kraft

Research output: Contribution to journalLetter

2 Citations (Scopus)

Abstract

Latitudinal and elevational richness gradients have received much attention from ecologists but there is little consensus on underlying causes. One possible proximate cause is increased levels of species turnover, or β diversity, in the tropics compared to temperate regions. Here, we leverage a large botanical dataset to map taxonomic and phylogenetic β diversity, as mean turnover between neighboring 100 × 100 km cells, across the Americas and determine key climatic drivers. We find taxonomic and tip-weighted phylogenetic β diversity is higher in the tropics, but that basal-weighted phylogenetic β diversity is highest in temperate regions. Supporting Janzen's ‘mountain passes’ hypothesis, tropical mountainous regions had higher β diversity than temperate regions for taxonomic and tip-weighted metrics. The strongest climatic predictors of turnover were average temperature and temperature seasonality. Taken together, these results suggest β diversity is coupled to latitudinal richness gradients and that temperature is a major driver of plant community composition and change.

Original languageEnglish (US)
JournalEcology letters
DOIs
StatePublished - Jan 1 2019

Fingerprint

latitudinal gradient
tropics
phylogenetics
turnover
phylogeny
temperature
ecologists
plant communities
mountains
community composition
seasonality
plant community
mountain
cells

Keywords

  • Americas
  • biome assembly
  • elevation
  • Jaccard dissimilarity
  • New World
  • UniFrac

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

McFadden, I. R., Sandel, B., Tsirogiannis, C., Morueta-Holme, N., Svenning, J. C., Enquist, B., & Kraft, N. J. B. (2019). Temperature shapes opposing latitudinal gradients of plant taxonomic and phylogenetic β diversity. Ecology letters. https://doi.org/10.1111/ele.13269

Temperature shapes opposing latitudinal gradients of plant taxonomic and phylogenetic β diversity. / McFadden, Ian R.; Sandel, Brody; Tsirogiannis, Constantinos; Morueta-Holme, Naia; Svenning, Jens Christian; Enquist, Brian; Kraft, Nathan J.B.

In: Ecology letters, 01.01.2019.

Research output: Contribution to journalLetter

McFadden, Ian R. ; Sandel, Brody ; Tsirogiannis, Constantinos ; Morueta-Holme, Naia ; Svenning, Jens Christian ; Enquist, Brian ; Kraft, Nathan J.B. / Temperature shapes opposing latitudinal gradients of plant taxonomic and phylogenetic β diversity. In: Ecology letters. 2019.
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