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Effect of ecological restoration and climate change on ecosystems: a case study in the Three-Rivers Headwater Region, China

Environmental Monitoring and Assessment volume 188, Article number: 382 (2016) Cite this article

Abstract

The Three-Rivers Headwater Region (TRHR) is the headwater of the Yangtze River Basin (YARB), Yellow River Basin (YRB), and Lancang River Basin (LRB); it is known as China’s ‘Water Tower’ owing to its important supply of freshwater. In order to assess ecosystem changes in the TRHR during 2000–2012, we systematically and comprehensively evaluated a combination of model simulation results and actual observational data. The results showed the following: (1) Ecosystem pattern was relatively stable during 2000–2010, with a slight decrease in farmland and desert areas, and a slight increase in grassland and wetland/water-body areas. (2) A warmer and wetter climate, and ecological engineering, caused the vegetation cover and productivity to significantly improve. (3) Precipitation was the main controlling factor for streamflow. A significant increase in precipitation during 2000–2012 resulted in an obvious increase in annual and seasonal streamflow. Glacier melting also contributed to the streamflow increase. (4) The total amount of soil conservation increased slightly from 2000 to 2012. The increase in precipitation caused rainfall erosivity to increase, which enhanced the intensity of soil erosion. The decrease in wind speed decreased wind erosion and the frequency of sandstorms. (5) The overall habitat quality in the TRHR was stable between 2000 and 2010, and the spatial pattern exhibited obvious heterogeneity. In some counties that included nature reserves, habitat quality was slightly higher in 2010 than in 2000, which reflected the effectiveness of the ecological restoration. Overall, the aforementioned ecosystem changes are the combined results of ecological restoration and climate change, and they are likely a local and temporary improvement, rather than a comprehensive and fundamental change. Therefore, more investments and efforts are needed to preserve natural ecosystems.

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Acknowledgments

We express our respect and gratitude to the anonymous reviewer and the handling editor for their helpful and constructive comments and suggestions, which have substantially improved the quality of this manuscript. This research was jointly funded by a key consulting project from the Chinese Academy of Engineering (2014–XZ–31) and the Chinese Research Academy of Environmental Sciences special funding for basic scientific research (2014–YKY–003).

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Authors and Affiliations

  1. College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, People’s Republic of China

    Chong Jiang

  2. Joint Center for Global Change Studies, Beijing, 100875, People’s Republic of China

    Chong Jiang

  3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People’s Republic of China

    Linbo Zhang

  4. Key Laboratory of Regional Eco-Process and Function Assessment and State Environment Protection, Chinese Academy of Environmental Sciences, Beijing, 100012, People’s Republic of China

    Linbo Zhang

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  1. Chong Jiang
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Correspondence to Chong Jiang or Linbo Zhang.

Electronic supplementary material

Appendix A

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Supplementary Figure 1

Spatial distribution of (a) meteorological and hydrological stations and natural reserves and (b) administrative divisions in the TRHR (JPEG 5823 kb)

Supplementary Figure 2

Temporal variations in (a) livestock capacity, (b) area of closed hillsides, and (c) artificial rainfall amount during 2005−2012 in the TRHR (JPEG 787 kb)

Supplementary Table 1

(DOC 40 kb)

Supplementary Table 2

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Supplementary Table 3

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Supplementary Table 4

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Jiang, C., Zhang, L. Effect of ecological restoration and climate change on ecosystems: a case study in the Three-Rivers Headwater Region, China. Environ Monit Assess 188, 382 (2016). https://doi.org/10.1007/s10661-016-5368-2

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  • DOI: https://doi.org/10.1007/s10661-016-5368-2

Keywords

  • Three-Rivers Headwater Region, China
  • Ecosystem change
  • Ecological restoration
  • Climate change
  • Ecosystem service