Journal of Resources and Ecology ›› 2020, Vol. 11 ›› Issue (6): 606-616.DOI: 10.5814/j.issn.1674-764x.2020.06.008

Special Issue: 中国耕地资源与粮食安全

• Land Resource and Land Use • Previous Articles     Next Articles

Effect of Land Use and Land Cover Change on the Changes in Net Primary Productivity in Karst Areas of Southwest China: A Case Study of Huanjiang Maonan Autonomous County

ZHANG Mengyu1,2,3(), ZHANG Li1,2,4,*(), REN Xiaoli1,2, HE Honglin1,2,4, LV Yan1,2,3, WANG Junbang1, YAN Huimin5   

  1. 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    2. National Ecosystem Science Data Center, Beijing 100101, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
    4. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
    5. Key Laboratory of Resource Utilization and Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2020-03-18 Accepted:2020-06-01 Online:2020-11-30 Published:2020-10-25
  • Contact: ZHANG Li
  • About author:ZHANG Mengyu, E-mail: zhangmy.18s@igsnrr.ac.cn
  • Supported by:
    The National Key Research & Development Program of China(2016YFC0500204);The National Natural Science Foundation of China(41571130043);The National Natural Science Foundation of China(31420103917);The National Natural Science Foundation of China(31971512)

Abstract:

Karst areas in southwest China have experienced significant land cover and land use change (LUCC) due to utilization for human activity and a comprehensive rocky desertification control project (RDCP) since 2008. It is important to quantify the effect of LUCC on ecosystem productivity in this region for assessing the overall benefit of this ecological restoration project. In this study, we used using MODIS land cover and NPP products to investigate the relative contribution of LUCC to the change in net primary productivity (NPP) during 2008-2013 in Huanjiang County, one of first one hundred pilot counties to implement RDCP. Our results show that NPP increased in 95.53% of the county, and the average growth of NPP in non-rocky desertification area was higher than in rocky desertification or potential rocky desertification areas. LUCC has an important contribution (25.23%) to the NPP increase in the county, especially in the LUCC area (70.97%), which increased the average NPP by 3.9% and 10.5%, respectively. Across the six RDCP regions in the county, the average increase in NPP for the vegetation restoration measure of governed karst area is significantly greater than in the ungoverned karst area, and the positive change in NPP increased with the increasing implementation area of the vegetation restoration measure.

Key words: land use change, net primary productivity, karst area, comprehensive control project for rocky desertification