干旱区研究

Arid Zone Research >

2022 , Vol. 39 >Issue 6: 1907 - 1916

DOI: https://doi.org/10.13866/j.azr.2022.06.21

Ecology and Environment

Temporal and spatial variation of vegetation ecological quality and its driving mechanism in Aksu prefecture

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  • 1. Zhejiang Climate Center, Hangzhou 310017, Zhejiang, China
    2. Aksu Prefecture Meteorological Administration, Aksu Prefecture 843000, Xinjiang, China
    3. Shaoxing Meteorological Administration, Shaoxing 312000, Zhejiang, China
    4. Zhuji Meteorological Administration, Zhuji 311800, Zhejiang, China
    5. State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

Received date: 2021-12-29

  Revised date: 2022-03-01

  Online published: 2023-01-17

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Abstract

Under the guidance of the theory of “Two mountains”, the construction of ecological civilization has been vigorously promoted in Aksu prefecture. Today a new path of high-quality development giving priority to ecological conservation and green development with Aksu characteristics has been found in Aksu prefecture. The vegetation ecological quality information is an important index to evaluate land ecosystems. Applying remote sensing technology to research vegetation ecological quality spatiotemporal variation offers practical scientific applications for developing eco-civilization. Aksu prefecture is typical sensitive area of climate change and fragile area of vegetation ecological environment in China, thus, it has a great practical significance to study vegetation ecological status in Aksu prefecture. Combined with multi-source remote sensing data and meteorological observation data, in this paper, we explore the temporal and spatial variations of vegetation ecological quality in the growing season (from July to September) and dominant factors of climate change and human activities in Asku prefecture from 2000 to 2021. The main result of this study as follows: (1) Both of fractional vegetation cover (FVC) and net primary productivity (NPP) showed an upward trend, while the "green degree" of vegetation increased significantly in Asku prefecture from 2000 to 2020; (2) The vegetation ecological quality showed a fluctuating upward trend in Aksu from 2000 to 2020. The ecological quality of vegetation in desert and bare land area of oasis edge increased significantly; (3) The dominant factor of VEQI change in most areas of Aksu is human activities, while climate change dominates VEQI change only in a small number of areas such as the north of Wensu county. In this paper, the temporal and spatial variation of vegetation ecological quality and its driving factors in Aksu prefecture in recent 22 years were analyzed by using several vegetation ecological parameters, which could provide data base and technical support for ecological civilization construction.

Key words： NPP; vegetation coverage; vegetation ecological quality; spatiotemporal variation; Aksu prefecture

Cite this article

FANG He,YAN Peiwen,SHI Jian,KANG Juan,LIU Hairong,CHEN Dan,LUO Ji,XU Dong . Temporal and spatial variation of vegetation ecological quality and its driving mechanism in Aksu prefecture[J]. Arid Zone Research, 2022 , 39(6) : 1907 -1916 . DOI: 10.13866/j.azr.2022.06.21

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