Reconciling the contribution of environmental and stochastic structuring of tropical forest diversity through the lens of imaging spectroscopy

Boris Bongalov, David F.R.P. Burslem, Tommaso Jucker, Samuel E.D. Thompson, James Rosindell, Tom Swinfield, Reuben Nilus, Daniel Clewley, Oliver L. Phillips, David A. Coomes

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)
165 Downloads (Pure)

Abstract

Both niche and stochastic dispersal processes structure the extraordinary diversity of tropical plants, but determining their relative contributions has proven challenging. We address this question using airborne imaging spectroscopy to estimate canopy β-diversity for an extensive region of a Bornean rainforest and challenge these data with models incorporating niches and dispersal. We show that remotely sensed and field-derived estimates of pairwise dissimilarity in community composition are closely matched, proving the applicability of imaging spectroscopy to provide β-diversity data for entire landscapes of over 1000 ha containing contrasting forest types. Our model reproduces the empirical data well and shows that the ecological processes maintaining tropical forest diversity are scale dependent. Patterns of β-diversity are shaped by stochastic dispersal processes acting locally whilst environmental processes act over a wider range of scales.

Original languageEnglish
Pages (from-to)1608-1619
Number of pages12
JournalEcology Letters
Volume22
Issue number10
Early online date26 Jul 2019
DOIs
Publication statusPublished - Oct 2019

Keywords

  • Beta diversity
  • dispersal
  • hyperspectral
  • LiDAR
  • neutral theory
  • niche
  • tropical forest

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