Owing to the far depart from the centre of the ecosystem,it is easy out of blance for the matter,energy and information in the ecosystem.So,they often are the ecological fragile zone.

• 生态交界带生态系统的结构、功能和物质、能量以及信息的交流与相邻生态系统有密切的联系,但又表现出明显的异质性。