5Rapport D J. Biosphere in Distress[J]. World and I, 2000, 15(4) :142 - 151.
6Jamieson D. Ecosystem health: some preventive medicine[ J]. Environmental Values, 1995, 4(4): 333- 344.
7Russow L M. Ecosystem health: an objective evaluation? [J]. Environmental Values, 1995, 4(4): 363- 369.
8De Leo G A , Levin S. The muhifaceted aspects of ecosystem integrity[J]. Conservation Ecology, 1997, 1 (1) : 3.
9Hull R B , Richert D , Seekamp E, et al. Understandings of environmental quality: ambiguities and values held by environmental professionals[J]. Environmental Management, 2003, 31, 1- 13.
10Brennan A, Lo Yeuk-Sze. Environmental Ethics [ EB/OL]. http://plato.stanford.edu/archives/sum2002/entries/ethics-environmental/,2004-11-20.
