Reconciling the contribution of environmental and stochastic structuring of tropical forest diversity through the lens of imaging spectroscopy. (26th July 2019)

• Record Type: Journal Article
• Authors: Bongalov, Boris; Burslem, David F. R. P.; Jucker, Tommaso; Thompson, Samuel E. D.; Rosindell, James; Swinfield, Tom; Nilus, Reuben; Clewley, Daniel; Phillips, Oliver L.; Coomes, David A.
• Editors: Comita, Liza
• Is Part Of: Ecology letters. Volume 22:Number 10(2019)
• Page Start: 1608
• Page End: 1619
• Publication Date: 2019-07-26
• Subjects: Beta diversity -- dispersal -- hyperspectral -- LiDAR -- neutral theory -- niche -- tropical forest; Ecology -- Periodicals; 577
• DOI: 10.1111/ele.13357
• Languages: English
• ISSNs: 1461-023X

Abstract

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.