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Species abundance distributions as a proxy for the niche-neutrality continuum

Journal of Plant Ecology 2018年第3期11卷 445-452页

作者： Xianzhi Wang M.D.Farnon Ellwood Dexiecuo Ai Renyi Zhang Gang Wang State Key Laboratory of Grassland Agro-Ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou University768 Jiayuguan RoadChengguan DistrictLanzhou730020China Centre for Research in Biosciences University of the West of EnglandColdharbour LaneBristol BS161QYUK State Key Laboratory of Grassland Agro-Ecosystems School of Life SciencesLanzhou University222 Tianshui RoadChengguan DistrictLanzhou730000China

Aims Species abundance distributions(SADs)are often used to verify mechanistic theories underlying community ***,it is now accepted that SADs alone are not sufficient to reveal biological *** attention focuses on the relative importance of stochastic dispersal processes versus deterministic processes such as interspecific competition and environmental ***,we combine a study of the commonness and rarity of species(*** SAD)with mechanistic processes underlying community *** comparing the occurrence frequen-cies of each and every species with its abundance,we quantify the relative contributions of common and rare species to the maintenance of community ***,we relate the continuum between commonness and rarity with that of niches and *** An individual-based,spatially explicit model was used to simu-late local communities in niche spaces with the same *** generated sets of assemblages from which species were elim-inated in opposing sequences:from common to rare and from rare to common,and investigated the relationship between the abundance and frequency of *** tested the predictions of our model with empirical data from a field experiment in the environmentally homogeneous alpine meadows of the Qinghai-Tibetan *** Findings Our simulations support the widespread notion that common species maintain community structure,while rare species maintain species diversity,in both local and regional *** results,both from theoretical simulations and from empirical observations,revealed positive correlations between the abundance of a particular species and its occurrence *** curves describe a continuum between commonness and *** species from the‘rare’end of this continuum has little effect on the similarity of communities,but remov-ing species from the‘common’end of the continuum causes significant increases in beta diversity,or specie

关键词： rarity commonness continuum occurrence frequency community similarities

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