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全球自然草原的地面净初级生产率的长期网格数据集

Ziwei Chen^1,2, Dongsheng Zhao³, Zhiyuan Zhang⁴

¹University Key Lab of Soil Ecosystem Health and Regulation in Fujian, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

Scientific data

|February 26, 2026

概括

一个新的数据集为全球草原提供了关键的地面净初级生产率 (ANPP) 数据,有助于碳建模和土地管理. 这些长期ANPP数据支持气候变化适应战略.

科学领域:

生态生态学生态生态学
气候科学气候科学
数据科学数据科学数据科学

背景情况:

准确的地面净初级生产率 (ANPP) 数据对于全球自然草原对于碳循环建模和可持续土地管理至关重要.
现有的ANPP数据集往往缺乏地面和地下生产力的分离,或者仅代表干扰后的条件,从而限制了它们的实用性.

研究的目的:

为全球自然草原开发一个全面的,网格化的ANPP年度数据集,涵盖历史和未来的时期.
为评估气候驱动的生产力和人类对草原生态系统的影响提供可靠的基准.

主要方法:

利用机器学习创建一个网格化的年度ANPP数据集.
从TerraClimate数据 (1958-2023) 获得历史ANPP,分辨率为1/24°.
在SSP245和SSP585场景下,从CMIP6模型 (2015-2100) 中纳入未来ANPP预测,分辨率为1/2°.

主要成果:

开发的ANPP模型展示了强大的性能 (R2 = 0.675 ± 0.009) 与验证的时间和空间可靠性.
承认由于有限的实地观测,在高生产率地区 (>700 g m−2) 潜在的低估值.

结论:

新的数据集提供了草原ANPP的空间显式,气候驱动的基线.
这种资源对于评估人类影响和在不断变化的气候条件下为适应性管理策略提供信息至关重要.

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相关概念视频

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.

Light Acquisition

Light Acquisition

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.