Abstract

It is hard to describe the population dynamics by specific numbers because there are many influencing factors, such as
accepting pollination, nutrition source, predator, disease and breeding way, and so on. The paper adopts the method of
appropriate concentric circle and new population dispersing index for population dynamics study.
Its main purposes includes: ????1. the comparison for same area in different years; ????2. the comparison for same community
in different areas; 3. the comparison for the advantages and disadvantages in different population in same community.
Meanwhile, the paper points out the advantages and disadvantages of this index, probe into the further optimized
measures and try to study the population dynamics scientifically and rationally.

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