Point patterns of tree distribution determined by habitat heterogeneity and dispersal limitation

摘要: Understanding processes underlying spatial distribution of tree species is fundamental to studying coexistence and diversity. This study modeled point patterns distribution, expressed by Cartesian coordinates individual trees within a mapped forest stand, for the purpose identifying that may generate communities. We used four primary pattern (homogeneous Poisson process, inhomogeneous homogeneous Thomas process) model in two stem-mapped forests Taiwan, Republic China. These models simulate habitat association seed dispersal, allowing us evaluate potential contribution heterogeneity dispersal limitation formation species. The results showed process was best fit described most studied, suggesting might be formed joint effects associations limitation. effect second model. also found could predicted attributes, including abundance mode. significant traits, however, differed between plots demonstrated site-specific patterns. indicated interactive operation niche-based (habitat heterogeneity) neutral-based (dispersal limitation) important generating