Analysis of Driving Factors of Ecosystem Service Value in Rocky Desertification Area of Panzhou City
The purpose of this study was to analyze the driving factors of ecosystem service value in rocky desertification area of Pan-zhou City.By using the comprehensive index method,the distribution maps of six ecosystems in the rocky desertification area of Pan-zhou City,including no obvious rocky desertification,potential rocky desertification,light rocky desertification,moderate rocky deser-tification,intense rocky desertification and extremely intense rocky desertification,were selected,and the runaway dynamic model of rocky desertification was adopted to analyze the change characteristics of rocky desertification in the 15 years from 2005 to 2020.Prin-cipal component analysis was used to determine the weights of driving factors in different ecosystems.The results showed that no obvi-ous rocky desertification and potential rocky desertification showed negative changes from 2005 to 2010;mild rocky desertification,moderate rocky desertification,intense rocky desertification and extremely intense rocky desertification showed positive changes;no ob-vious rocky desertification,potential rocky desertification and mild rocky desertification showed positive changes from 2010 to 2015 and 2015 to 2020.Moderate rocky desertification,intense rocky desertification and very intense rocky desertification showed negative chan-ges.The proportion of moderate,intense and extremely intense rocky desertification areas during 2015-2020 was 11.18%,2.29%and 1.44%,respectively,less than that during 2005-2010 and 2010-2015.The main driving forces affecting the evolution of rocky deser-tification in Panzhou City are the gross agricultural product,total population,population density and cultivated land area,and the q value is stable at about 0.2.Therefore,according to the general situation of the rocky desertification area in Panzhou City,combined with multiple factors such as natural geography and social economy,ecological management is carried out according to the driving factor evaluation index,so as to promote regional sustainable development.
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