1 The character of intertidal biotic community is a result of interaction between environmental factors and interspecific competition.

2 Consistency of biotic community and eco logicaI environment is a basic element of ecosystem.

3 Under stable operation conditions, biotic community with relatively stable microorganism biomass and microbial activity was gradually developed in wetland substrate.

4 As a kind of biotic community, the enterprise cluster possesses some behavioral traits of the animal community.

5 A significant range of Shirley Geok-lin Lim's poetry dwells on place and the fraught relationship between self and place: a relationship often expressed in terms of the land and the biotic community.

6 The enterprise cluster, which possesses some behavioral traits of the biotic community, is a social ecological system.

7 Which is, does it make us better citizens of the biotic community?

8 The ecosystem is not only the substantial and environmental foundation of human' s survival and development, but the integrative entia of biotic community and the environment.

9 Diversity of river fOrm is the core of ecological environment of river basin ecosystem, and base for the diversity of biotic community.

10 The decisivenfactors of aggregation are stability of animal quantity, diversity of biotic community, complexity of landscape and sickly foci.