Abstract: 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.

Key words: Copper, R.kamoji, Root growth, Seed germination