生态系统健康与相关概念的逻辑关系

Logical interrelations between ecosystem health and its related notions

生态系统健康是近年才发展起来的生态学上的一个研究热点。与可持续性一样 ,生态系统健康在生态学中也是很重要的新的研究领域。本文对生态系统健康及与之相关的概念进行了逻辑上的比较与推断。这些概念包括可持续性、稳定性、连续性和持久性。并得出了以下结论 :①稳定性是健康、可持续性、连续性和持久性的必要条件而不是充分条件 ;②连续性是健康、可持续性、稳定性的充分条件而非必要条件 ,是持久性的充分必要条件 ;③持久性是可持续性和连续性的充分必要条件 ,是健康和稳定性的充分而非必要条件 ;④健康是可持续性、连续性和持久性的必要而非充分条件 ,是稳定性的充分而非必要条件 ;⑤可持续性是稳定性、健康的充分而非必要条件 ,是连续性的必要而非充分条件 。

Ecosystem health is an integrative science that develops in recent years.As ecological sustainability is an important notion in ecology,this paper investigates the logical interrelations between four properties that may be useful in understanding different aspects of ecosystem health and making it a more operational and useful concept.These properties include sustainability,system stability,continuation and longevity.The principal findings are as follows:①stability is necessary but not sufficient for sustainability,continuation,longevity and health;②continuation is sufficient but not necessary for sustainability,stability,and health and both sufficient and necessary for longevity;③longevity is sufficient and necessary for sustainability and continuation and sufficient but not necessary for stability and health;④health is necessary but not sufficient for sustainability,continuation,and longevity and sufficient but not necessary for stability;⑤sustainability is sufficient but not necessary for stability and health;necessary but not sufficient for continuation,and both sufficient and necessary for longevity.