4.2 factors controlling succession 控制演替的主要因素 plant seed migration,dispersal;animal activities Environmental changes inside/outside the communities (e.g.fire,wind,water.) Intraspecific/interspecific relationship changes farming practices/land management 66 plant seed migration, dispersal; animal activities Environmental changes inside/outside the communities (e.g. fire, wind, water.) Intraspecific/interspecific relationship changes farming practices/ land management 4.2 factors controlling succession 控制演替的主要因素