The modifiable areal unit problem(MAUP)of species diversity in the forest community of northern Fujian Province was studied.The results show that there were scale effect and zoning effect for species diversity in the studied communities.The scale effect and zoning effect might decrease if the sample area was increased.The effects of MAUP upon degraded forest caused by human recently and conserved forest shew a same tendency with the sample area extended.Using Jackknifing method was able to es...