Ecological protection and restoration strategy for Haitan Island based on identification of ecological network function

Nowadays, optimizing the pattern of land space development, ecological protection and restoration becomes an important pusher to promote the construction of ecological civilization. Its important breakthrough point is to construct regional ecological network and to identify the key ecological function areas. This paper takes Haitan Island as an example. By using remote sensing information and GIS spatial analysis technology, the potential functional structure of ecological network is identified. Then, the importance of ecological source land and ecological node of Haitan Island is revealed based on the evaluation of important landscape connectivity, and finally the ecological protection and restoration strategies are proposed. The result shows that, firstly, there are 30 ecological sources, 219 ecological corridors and 67 ecological nodes which constitute the regionallypotential ecological network of Haitan Island. Secondly, the ecological function of ecological occupation in Haitan Island is mainly in the low value area, followed by the median value area and high value area, which accounts for 54.8%, 25.3% and 19.9% of the area studied, respectively. Thirdly, the overall integral index of connectivity (dIIC) of Haitan Island landscape is poor, the spatial distribution character of flux index (dF) orients from southwest to northeast through the whole island and the probability of connectivity index (dPC) presents the characteristics of gradient transition from south to north. At last, according to the analyzed results of ecological network function, we should regulate the interference activities of human beings and restore the damaged areas in key areas so as to strengthen the relationship between landscape structure and function for enhancement of ecosystem safety and stability.