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在现象变化和人类影响下,三河源地区净初级生产率的时间和空间演变

Fujiang Liu¹, Tianqi Wu¹, Weihua Lin²

¹School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China.

Environmental monitoring and assessment

|July 2, 2024

概括

三河河头地区的净初级生产率 (NPP) 从西北向东南呈低至高的分布,观察到显著的改善. 土壤水分和降水等气候因素是这些变化的关键驱动因素.

科学领域:

生态生态学生态生态学
环境科学环境科学
气候变化研究气候变化研究

背景情况:

了解净初级生产率 (NPP) 的时空变化对于气候脆弱地区的生态保护至关重要.
三河源区是一个面临环境压力的关键生态系统.

研究的目的:

在2000年至2020年期间,模拟三河源地区的实际NPP (NPPA) 和气候潜力NPP (NPPC).
分析NPPA和NPPC的时空变化模式.
调查人类活动和气候因素对NPPA的影响.

主要方法:

泰尔-森中位数方法和曼-肯德尔突变分析用于时空变异.
地理加权回归和机器学习用于因素影响分析.
模拟实际的核电站 (NPPA) 和气候潜在的核电站 (NPPC).

主要成果:

平均NPPA为382.506,分布从西北到东南从低到高.
年度NPPA增加了大约1.034,长江源区表现出最大的改善 (74.1%).
在2002-2003年间,NPPA经历了突然的变化,在2005年之后出现了更明显的上升趋势. 人类造成的影响随着时间的推移而变化,土壤水分和降雨是主要的驱动因素.

结论:

三河源区的NPPA显示出整体上升趋势,特别是在长江源区.
气候因素,特别是土壤水分和降水,是NPPA变化的主要驱动因素,随着时间的推移而产生不同的影响.
该研究为该地区的生态评估和保护工作提供了关键的理论支持.

关键词:

人类活动对人类活动的影响.卡内基·艾姆斯·斯坦福的方法.气候和环境的影响.机器学习是机器学习.净初级生产率净初级生产率三河源地区的三河源地区

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Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

Global Climate Change

Global Climate Change

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.