Land utility structure changing trend and its response to ecological service functions—A case study in Zhanjiang City,Guangdong Province

The present paper is aimed at introducing its analysis of the effect of land utility structure on the ecosystem service function.For this purpose,the paper takes the land use situation in Zhanjiang City,Guangdong,as a case study.Quoting the alternative land use investigation data of the city during the period from 1996 to 2005,the paper has analyzed the land use changing situation by way of landscape ecology along with the response of the ecosystem service functions to the land use structure changing situation with the ecosystem service function unit area of the Chinese terrestrial ecosystem proposed by Mr.Xie Gaodi.The results of the paper's analysis show that the GMi,Hi and Ei of the land utility continue to increase.whereas the Di of land utility goes on decreasing in the city from 1996 to 2005,which may account for the ever more diversifying trend and the ever more equalization of land use types.It also accounts for the complexity and stability of ecosystem being ever more enhanced in the city.Moreover,it is necessary to point out that the ecosystem service function also changes noticeably because of such a land use structure change,though the change seems somewhat irregular with timely fluctuation.In spite of this,the correlation analysis between the ecosystem service values and the GMi,Hi,Di and Ei of land use also reveals that correlation because their correlation coefficients are only 0.143,0.104,-0.104 and 0.103 is not enough evident.However,the stability of the land use ecosystem remains the basis and prerequisite to improving the ecosystem service functions.Therefore,measures are to be taken to adjust the land use structure in the new round of land utility planning revision so as to improve the ecosystem service functions of Zhanjiang City.