获取有关多边环境协议的信息

  • 土地和农业
  • 环境治理

Definition(s)

A sequence of organisms on successive trophic levels within a community, through which energy is transferred by feeding; energy enters the food chain during fixation by primary producers (mainly green plants) and passes to the herbivores (primary consumers) and then to the carnivores (secondary and tertiary consumers). (Source: GEMET/LBC)