Health Assessment Methods And Appilication Of Island Ecosystem

Ecosystem health is one of the important research directions in ecology fields. Most research results were based on qualitative methods or combining qualitative methods with quantitative ones to give descriptive evaluation for Ecological health status. Island is a compound ecological system and it is still a relatively independent physiognomy cell. This paper discussed rudimental theories and evaluation methods of the island ecological health. Furthermore, a case study was carried out in Chang-island.The research contents of this paper include:1. Correlation theory analysis of the island ecological system The method of studying the character of island ecological system is that the whole characters, biological characters, environmental characters, social and economic characters of the island ecological system were analyzed respectively. Moreover, the existed problems presently in China associated with island ecological health were still discussed in this paper.2. Health evaluation method of island ecological systemAs a complex ecological system, island was decomposed into three subsystems, which include island land, tideland, and onshore. The indexes of health evaluation of the island ecological system were composed of vigor, organize ability, heterogeneity and harmony in this paper. Vigor is focused on describing the status of whole island ecological system. Organize ability mainly treated with the biological status of the island ecological system. Heterogeneity mainly emphasized biological environment status of the island ecological system. Harmony primarily reflects the harmony degree between mankind and ecological system. Every index is composed of some measurable factors, which include initial production power analysis, explain structure modeling, pattern analysis of biological environment, ecological footmark...