On the view of the symbiosis coupled relationship among enterprises in the ecological industrial chain network,the recognition of the enterprise niche factors and key species enterprise in the ecological industrial chain network were discussed,and a new method to build and optimize the ecological industrial chain network was established.

Study on Eco-Industrial Chain Growing Mechanism;

Study on eco-industrial chain (net) and industry scale in mining area

Based on the theory of "keystone species" in ecology,this paper puts forward a concept of keystone industry in pursuit of setting up an eco-industrial chain for the projected industrial park based on the coking industry in Xiaoyi City of Shanxi Province,where mineral resources abound such as coal and aluminum.

Then ecological industry chain system is constructed.

This paper is the first to present the concept of the ecological industry chain system and universality method.

Study on the Ecological Industrial Chain s Construction and Evaluation for Iron and Steel Industrial Park;

Constructing ecological industrial chain and developing eco-industry is effective way of changing global economic model from linear to ecological economy.

The ecological industry chain of industry was analyzed by introduced the theory of niche and it was thought that the niches of the chain of industry included two meanings.

,which is based on ecological conditions and viticulture,guaranteed by wine production and by-products utilization,and constitutes an extremely effective ecological industry chain,in which waste from manufactures can be recycled to optimize wine industry,as well as highlighting the embodiment of coupling resources to ecosystem.