编者按：地球上的生态系统是一种复杂的生命支持系统，生态系统对人类的贡献，在生态学研究中经常用“社会效益和经济效益”来表述，是可以用经济价值来估算的。然而，由于其复杂性和不确定性，对这两个效益如何进行估价，一直是困扰生态学家和经济学家的重要问题。Ｃｏｓ... Editor’s Note: The Earth’s Ecosystem is a Complex Life Support System. The contribution of ecosystems to human beings, often expressed as “social and economic benefits” in ecological research, can be estimated using economic values. However, because of its complexity and uncertainty, how these two benefits are valued has long been an important issue for ecologists and economists. Cos ...