Temporal and Spatial Changes in Vegetation Ecological Quality and Driving Mechanism in Kökyar Project Area from 2000 to 2021

Ziyi Wang, Tingting Bai, Dong Xu, Juan Kang, Jian Shi, He Fang, Cong Nie, Zhijun Zhang, Peiwen Yan and Dingning Wang
Additional contact information
Ziyi Wang: School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
Tingting Bai: School of Business Administration, Northeastern University, Shenyang 110819, China
Dong Xu: State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
Juan Kang: Aksu Prefecture Meteorological Administration, Aksu 843000, China
Jian Shi: Aksu Prefecture Meteorological Administration, Aksu 843000, China
He Fang: Zhejiang Climate Center, Hangzhou 310051, China
Cong Nie: College of Geomatics Science and Technology, Nanjing Tech University, Nanjing 211816, China
Zhijun Zhang: Aksu Forestry Development Guarantee Center, Aksu 842008, China
Peiwen Yan: Aksu Prefecture Meteorological Administration, Aksu 843000, China
Dingning Wang: School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, China

Sustainability, 2022, vol. 14, issue 13, 1-18

Abstract: The “Kökyar Greening Project” in the suburb of Aksu, Xinjiang, is a model of large-area artificial afforestation in an environment of drought and water scarcity. As an important part of the “3-North Shelter Forest Program”, it plays an important role in promoting the economic development and the environmentally friendly construction of Aksu and even of the whole Xinjiang region. Based on multisource remote-sensing data and meteorological observation data, this study explored the temporal and spatial changes in the vegetation parameters (FVC, NPP, and VEQI) and the ecological parameters (RSEI and LULC) in the Kökyar Project Area from 2000 to 2021. Based on the Theil–Sen median and TSS-RESTREND, this study investigated the path of mutual influence among the FVC, NPP, VEQI, and RSEI, as well as their responses to climate change and human activities. The results show that: (1) from 2000 to 2021, the FVC, NPP, VEQI, and RSEI in the Kökyar Project Area showed a significant upward trend and showed the distribution characteristics of “high in the south and low in the north”. (2) Over the past 22 years, the RSEI has shown a significant increase with the FVC, NPP and VEQI ( p < 0.001), indicating that the “Kökyar Greening Project” has achieved significant ecological benefits. (3) The changes in the vegetation parameters and RSEI in the Kökyar Project Area were dominated by human activities. (4) The Kökyar Project Area has caused great changes to the ecosystem pattern of the region, and the vegetation parameters and RSEI in the Kökyar Project Area have increased, mainly in the form of cropland and grassland expansion over the past 22 years.

Keywords: Kökyar greening project; net primary productivity; fractional vegetation cover; vegetation ecological quality index; remote-sensing ecological index; land use and land cover (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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