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Submitted on: 01 October 2003.
Revised on: 09 January 2004.
Accepted on: 29 February 2004.
___________________Ecosystem Health and Sustainability
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http://reply.papertrans.cn/1/80/8000/8000-14.png
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http://reply.papertrans.cn/1/80/8000/8000-16.png
Submitted on: 09 April 2016.
Revised on: 31 May 2016.
Accepted on: 11 June 2016.
___________________Ecosystem Health and Sustainability
http://reply.papertrans.cn/1/80/8000/8000-18.png
Submitted on: 11 July 2013.
Revised on: 22 August 2013.
Accepted on: 09 October 2013.
___________________Ecosystem Health and Sustainability
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