Spatiotemporal Evolution of Vegetation Coverage and Its Response to Climate Change in Upper Reaches of Ganjiang River Basin During 2000-2018

Liu Mingxia; Liu Youcun; Chen Ming; Li Qi; Liang Qi; Zou Jieping; Qiaolipanguli·Tuerhong

doi:10.13961/j.cnki.stbctb.2020.05.041

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Spatiotemporal Evolution of Vegetation Coverage and Its Response to Climate Change in Upper Reaches of Ganjiang River Basin During 2000-2018

- Spatiotemporal Evolution of Vegetation Coverage and Its Response to Climate Change in Upper Reaches of Ganjiang River Basin During 2000-2018
- Bulletin of Soiland Water Conservation Vol. 40, Issue 5, Pages: 284-290(2020)
- 作者机构：
  
  1. 江西理工大学建筑与测绘工程学院,江西,赣州,341000
  2. 江西理工大学资源与环境工程学院,江西,赣州,341000
  3. 江西环境工程职业学院生态建设与环境保护学院,江西,赣州,341000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2020.05.041
  CLC： TP79;X171
- Published：2020
- 稿件说明：
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Liu Mingxia, Liu Youcun, Chen Ming, et al. Spatiotemporal Evolution of Vegetation Coverage and Its Response to Climate Change in Upper Reaches of Ganjiang River Basin During 2000-2018[J]. Bulletin of Soiland Water Conservation, 2020, 40(5): 284-290.
DOI：

Liu Mingxia, Liu Youcun, Chen Ming, et al. Spatiotemporal Evolution of Vegetation Coverage and Its Response to Climate Change in Upper Reaches of Ganjiang River Basin During 2000-2018[J]. Bulletin of Soiland Water Conservation, 2020, 40(5): 284-290. DOI： 10.13961/j.cnki.stbctb.2020.05.041.

摘要

[目的] 对赣江上游植被覆盖度时空演化及其对气候变化响应的研究，为区域的生态环境保护提供科学依据和数据支撑。[方法] 基于MODIS NDVI数据，结合年平均气温和年降水量数据，运用趋势分析、变异系数、Hurst指数与相关分析等方法对赣江上游2000—2018年的植被覆盖度时空演化及其对气候变化的响应进行了分析。[结果] ①赣江上游植被覆盖度呈显著增加趋势，增速为5.21%/10 a，空间上呈现四周高中间低的特征，且以高植被覆盖为主；研究区植被覆盖度呈极显著和显著增加的分别占25.59%和39.7%，极显著和显著减少的分别占1.32%和2.46%，而变化不显著的占57.84%；②研究区植被覆盖总体上比较稳定，平均变异系数为14.73%；Hurst分析显示赣江上游植被变化反持续性要强于持续性，总体上以弱反持续性为主；③研究区植被生长总体上受气温影响强于降水量，但存在空间差异。[结论] 赣江上游植被覆盖度变化较小，未来将呈微弱下降趋势，气温是影响植被生长的主要气候因子。

Abstract

[Objective] The spatiotemporal evolution of vegetation coverage and its response to climate change in the upper reaches of the Ganjiang River basin were studied to provide a scientific basis and data support for regional ecological environmental protection.[Methods] Based on MODIS normalized difference vegetation index (NDVI) data

combined with annual average temperature and annual precipitation data

the trend analysis

coefficient of variation

Hurst index

and correlation analysis were used to analyze the spatiotemporal evolution of vegetation coverage and its response to climate change in the upper reaches of the Ganjiang River basin from 2000 to 2018.[Results] ① The fractional vegetation coverage in the upper reaches of the Ganjiang River basin showed a significant increase

with a growth rate of 5.21%/10 a. Spatially

the vegetation coverage showed the distribution characteristics of being low in the middle and high in the surroundings

mainly with high vegetation coverage. The fractional vegetation coverage in the study area showed an extremely significant increase and a significant increase account for 25.59% and 39.70%

respectively

and an extremely significant decrease and a significant decrease account for 1.32% and 2.46%

respectively. Insignificant change accounts for 57.84%. ② The vegetation coverage was generally stable in the study area

with an average coefficient of variation of 14.73%. Hurst analysis showed that the antisustainability of vegetation changes in the upper reaches of the Ganjiang River basin was stronger than the sustainability

and weak antisustainability was mainly dominant. ③ The vegetation growth in the study area was generally more affected by temperature than by precipitation

but there were spatial differences.[Conclusion] The fractional vegetation coverage in the upper reaches of Ganjiang River basin changes little and will decrease slightly in the future. Temperature is the main climate factor affecting vegetation growth.

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