在2000-2021年期间,中国西北地区的空间时间变化及其NDVI的驱动因素
Jiaxin Zhang1,2, Tao Yang1,2, Mingjiang Deng1,3
1State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China.
Environmental science and pollution research international
|November 3, 2023
概括
中国西北地区的植被呈现出改善的趋势,但人类活动是主要的驱动因素,影响了生态恢复工作. 了解这些动态对于该地区的可持续发展至关重要.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 西北中国 (WTL) 是一个重要的生态区和经济走廊,极易受到气候变化和人类影响.
- 在WTL的植被健康对于生态稳定和区域发展战略,如"一带一路"至关重要.
研究的目的:
- 用标准化差异植被指数 (NDVI) 数据分析WTL植被的时空演变.
- 研究植被变化背后的驱动机制,并预测未来的趋势.
- 为 WTL 生态系统恢复提供科学建议.
主要方法:
- 利用NDVI数据来评估植物随时间和空间的变化.
- 使用地质探测器,部分相关性分析和剩余趋势分析来确定驱动因素.
- 纳入降水量,植被类型,土地使用和土壤类型作为关键影响参数.
主要成果:
- 总体而言,NDVI呈现出改善的趋势,从中心增加到外围,尽管49%的地区呈现出恶化.
- 植被变化的趋势在很大程度上是不可持续的,57.45%的地区显示不确定未来的植被覆盖面.
- 人类活动是NDVI变化的主要驱动因素 (80.28%),超过气候变化 (19.72%),因因素之间的相互作用影响.
结论:
- 人类活动对WTL的植被动态有重大影响,需要有针对性的保护策略.
- 这些发现凸显了WTL生态系统的脆弱性,以及需要采用综合管理方法.
- 了解气候和人类因素的相互作用对于有效的生态恢复和可持续的土地利用规划至关重要.
相关概念视频
01:50Global Climate Change
24.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.4K
02:16Light Acquisition
8.5K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.5K