Assessing the relative role of climate and human activities on vegetation cover changes in the up–down stream of Danjiangkou, China

doi:10.1093/jpe/rtab082

Journal of Plant Ecology ›› 2022, Vol. 15 ›› Issue (1): 180-195.DOI: 10.1093/jpe/rtab082

收稿日期:2021-04-09 修回日期:2021-05-18 接受日期:2021-06-28 出版日期:2022-02-01 发布日期:2022-03-21

Assessing the relative role of climate and human activities on vegetation cover changes in the up–down stream of Danjiangkou, China

Hai Liu^1,2, Feng Liu^1,2, Hongmeng Yuan^1,2, Liang Zheng^3,*, and Yuan Zhang⁴

¹ Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China, ² Key Laboratory of Regional Development and Environmental Response, Hubei University, Wuhan 430062, China, ³ State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China, ⁴ Ecological Research Laboratory, Environmental Monitoring Center Station of Hubei Province, Wuhan 430071, China

^*Corresponding author. E-mail: liangzheng@whu.edu.cn

Received:2021-04-09 Revised:2021-05-18 Accepted:2021-06-28 Online:2022-02-01 Published:2022-03-21

摘要/Abstract

摘要：

气候与人类活动对丹江口上下游植被覆盖变化的影响

丹江口水库是南水北调中线工程的水源地，研究丹江口水库植被覆盖动态变化及其影响因素，对于了解南水北调中线工程的生态环境及制定保护措施具有重要意义。本研究采用归一化植被指数(NDVI)分析了1982–2018年丹江口大坝上下游植被的动态变化及其影响因素。研究结果表明，研究时段内NDVI呈0.017year^-1的增加趋势(P < 0.05)，显著增加的区域位于大坝上游河谷附近，显著减少的区域主要分布在大坝下游流域和中心城区周围。气候变化和人类活动对NDVI变化的综合贡献率分别为92.03%和7.97%。大坝上游的人类活动主要体现在退耕还林等生态措施的实施，大坝下游的人类活动主要表现为城市扩张、建设用地占用耕地和林地等。

关键词: 遥感监测, NDVI, 气候变化, 城市扩张, 退耕还林

Abstract:

Danjiangkou Reservoir is water source of Middle Route Project of the South-to-North Water Diversion (SNWD) Project, research on the dynamic changes in vegetation cover and its influencing factors is of great significance for understanding the ecological environment of the water diversion area and formulating protection measures. In this study, the normalized difference in vegetation index (NDVI) was used to analyze the dynamic changes and influencing factors of vegetation in the upstream and downstream of Danjiangkou Dam from 1982 to 2018. The results showed that the NDVI exhibited an upward trend of 0.017 year⁻¹ (P < 0.05), and that the significantly increased area was located near the valley upstream of the dam, while the significantly decreased area was mainly distributed in the basin downstream of the dam and around the central city. The comprehensive contributions of climate and human activity factors to NDVI changes were 92.03% and 7.97%, respectively. The human activities in the upstream of the dam were mainly reflected in the ecological measures such as returning farmland to forest; the human activities at the downstream of the dam were mainly reflected in urban expansion, occupation of cultivated land and forest land by construction land.

Key words: remote sensing monitoring, NDVI, climate change, urban expansion, returning farmland to forest

. [J]. Journal of Plant Ecology, 2022, 15(1): 180-195.

Hai Liu, Feng Liu, Hongmeng Yuan, Liang Zheng, and Yuan Zhang. Assessing the relative role of climate and human activities on vegetation cover changes in the up–down stream of Danjiangkou, China[J]. J Plant Ecol, 2022, 15(1): 180-195.

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Assessing the relative role of climate and human activities on vegetation cover changes in the up–down stream of Danjiangkou, China

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