
Protection policy impacts on landscape pattern changes and ecosystem service value responses in Fuxian Lake basin
LI Sirong, SU Tongxiang
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (3) : 145-154.
Protection policy impacts on landscape pattern changes and ecosystem service value responses in Fuxian Lake basin
【Objective】 Changes in landscape patterns and ecosystem service values (ESVs) in the Fuxian Lake basin are affected by the “Four Retreats and Three Returns” protection policy. Quantitatively understanding such changes can provide a reference for the protection of watershed landscapes. 【Method】 Four sets of remote sensing images taken from 2006 to 2021 (before and after the implementation of the “Four Retreats and Three Returns” protection policy) were selected for landscape classification, and the land use dynamics, transfer matrix and landscape pattern indices were calculated. The ESVs were evaluated using the equivalent factor method and the SPSS software package was used to analyze the correlations between the ESVs in the watershed and the landscape pattern indices. 【Result】 The results indicated that the forested and water system areas in the Fuxian Lake basin were small, while the construction land area was expanding before the implementation of the “Four Retreats and Three Returns” protection policy. The landscape pattern was also complicated and fragmented, with weak connectivity and low ESVs. After the policy was implemented, the forested area increased significantly, the expansion of construction land slowed significantly, and the rate of water system reduction decreased. The degree of fragmentation of the landscape pattern also decreased and the connectivity was enhanced. The ESVs in the basin increased significantly. (2) The ESVs in the Fuxian Lake basin were connected with the landscape pattern, and the total basin ESV was significantly positively correlated with CONTAGE and negatively correlated with SHDI and SHEI. Among the individual ESVs, supply services were significantly negatively correlated with LPI, regulation and support services were significantly positively correlated with CONTAGE and significantly negatively correlated with SHDI and SHEI, and cultural services were significantly positively correlated with CONTAGE. 【Conclusion】 Future studies should focus on the mechanism behind these changes and provide a reference for the next step in protecting and managing the Fuxian Lake basin.
ecosystem service value(ESV) / landscape pattern / ‘Four Retreats and Three Refunds’ policy / Fuxian Lake basin of Yunnan Province
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