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Beyond neutrality:adding habitat filtering to neutral models

Ecological Processes 2020年第1期9卷 305-313页

作者： Wasana Abeysinghe Ruwan Punchi-Manage Department of Statistics and Computer Science Faculty of ScienceUniversity of PeradeniyaPeradeniya 20400Sri Lanka

Background:Understanding the processes that structure species is one of the primary focuses in community ***’s neutral model shows stochastic processes alone can describe the two macro-ecological patterns,species richness and species-area relationship,of the *** Hubbell’s neutral model can explain the macro-ecological patterns of the species at large scales,it paid less attention to construct the spatial structure of the *** studies suggest that such spatial structures are mostly due to habitat filtering processes work at the intermediate spatial ***,Hubbell’s neutral model does not explain the full picture of the community structuring due to its fully stochastic ***:In this study,we proposed a two-schema model that has the habitat filtering component and the stochastic component to construct the species assemblages seen in the community *** proposed model uses one additional parameter(*** of individuals in habitat)in addition to Hubbell’s three-parameter neutral model(*** bio-diversity number(θ),dispersal limitation(m)and speciation(v)).The proposed model works at two spatial scales:habitat filtering at the intermediate scales and stochastic processes at the large and very small spatial *** model coupled the local community dynamics with the meta-community *** local community has a fixed area with carrying capacity that is proportional to the local community *** number of habitats in the proposed model can *** are placed into habitats with probabilities according to the habitat *** richness and species composition in each habitat were *** model is fitted for differentθvalues,m values,and a different number of ***:We assume that habitat filtering plays an important role together with stochastic processes to structure species in ***,the proposed model with only four parameters can explai

关键词： Neutral theory habitat models Fundamental bio-diversity number Immigration Local community

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