Analysis based on Hurlbert diversity index shows that the communitystability of inside level is less than the outside one.
群落物种个体数的差异，东、南、西、北比上、中、下和内、外部位小。
2
The insect communitystability of the plot of the longest organic management time was the best, while the control plot of conventional management was the worst.
其中有机管理年限最长地块的昆虫群落的稳定性最好，常规管理的对照地块的昆虫群落稳定性最差。
3
Accompanied with the implementation of community policing strategy, community police room plays an important role in maintaining communitystability and promoting social harmony.