Size-Class Effect Contributes to Tree Species Assembly through Influencing Dispersal in Tropical Forests

摘要: We have investigated the processes of community assembly using size classes trees. Specifically our work examined (1) whether point process models incorporating an effect size-class produce more realistic summary outcomes than do without this effect; (2) which three selected incorporating, respectively environmental effects, dispersal and joint-effect both these, is most useful in explaining species-area relationships (SARs) dispersion patterns. For evaluation we used tree species data from 50-ha forest dynamics plot Barro Colorado Island, Panama comparable 20 ha at Bubeng, Southwest China. Our results demonstrated that dramatically improved SAR estimation plots when only model was used. The joint produced similar improvement but for Panama. patterns were not by incorporation effects any models. indicate likely to be a key determining SARs environment-only joint-effects effective level level, respectively. conclude it critical use multiple characteristics modelling spatial levels if comprehensive understanding ecological shape species’ distributions sought; may inherent biases. By influencing dispersal, contributes enhances coexistence.