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| Dynamic changes of vegetation in Karst areas of Southwest China during 2001-2016 |
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| DOI：10.16768/j.issn.1004-874X.2017.12.015 |
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| Abstract: |
| Karst areas in Southwest China are important research areas of ecological civilization construction
and fragile ecological protection，and rocky desertification is the most important ecological environment problem
in these areas. Based on the dataset of MOD13Q1 NDVI during 2001－2016 and Karst spatial distribution data，
the trends of vegetation changes were calculated and the vegetation changes in different rock desertification control
modes were analyzed. The study areas included Guangxi，Guizhou and Yunnan provinces. The results indicated that
the karst areas of Southwest China had good vegetation coverage conditions. The vegetation coverage values from high
to low were Guangxi，Yunnan and Guizhou provinces. In 2009－2016，the vegetation coverage increased generally
compared with that in 2001－2008. There were biggest changes in Guizhou province，followed by Guangxi province，
and finally Yunnan province. In the past 16 years，the vegetation changes in southwest karst areas were mainly
increasing and the improving areas in 2009－2016 increase by 12.39% than those in 2001－2008. And Guangxi
province had the biggest increasing range. By comparing the vegetation changes under various rocky desertification control modes，the Small Watershed-Governance Model and Artificial Afforestation Model were better than other
modes. The economic forest mode had the least effect on vegetation improvement. This study can provide basic
information and reference for rocky desertification control in Southwest China. |
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