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通过远程传感和机器学习技术估计厄瓜多尔高安第斯地区的初级生产率

Cindy Urgilés^1,2, Johanna Orellana-Alvear^3,4, Patricio Crespo^3,5

¹Departamento de Recursos Hídricos y Ciencias Ambientales, Universidad de Cuenca, Cuenca, 010207, Ecuador. cindyurgiles1996@gmail.com.

International journal of biometeorology

|November 27, 2024

概括

机器学习模型准确地估计了安第斯帕拉莫生态系统的总初级生产率 (GPP). 随机森林模型表现出色,确定太阳辐射是GPP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:

估计总初级生产率 (GPP) 对碳循环建模和气候变化缓解至关重要.
直接GPP测量超出叶子尺度是有限的,需要间接估计方法.
遥感和建模方法是提高GPP估计的关键.

研究的目的:

通过机器学习 (ML) 和传统模型,在湿的安第斯帕拉莫生态系统中估计GPP.
分析影响GPP的复杂,非线性关系,并评估气候预测模型的不确定性.
将ML模型 (随机森林,支持向量回归) 的性能与传统方法进行比较.

主要方法:

使用机器学习模型,特别是随机森林 (RF) 和支持向量回归 (SVR),用于GPP估计.
将ML模型的准确性和性能与传统的GPP估计技术进行了比较.
根据GPP估计,对未来气候预测进行不确定性分析.

主要成果:

基于ML的模型在估计GPP方面表现优于传统方法.
模型性能因季节性而异,相关系数 (R) 从0.24到0.86.8不等.
射频模型在较低湿度的季节显示出最高准确度 (R=0.86),RMSE和偏差较低.
太阳辐射被确定为帕拉莫生物群中GPP的主要预测因素,超过了水的影响.

结论:

机器学习模型提供了一种可靠的方法来估计复杂生态系统中的每日GPP流量.
了解GPP驱动因素,如帕拉莫的太阳辐射,对于准确的植被建模至关重要.
这项研究的结果支持开发改善的植被预测模型,以适应气候变化.

关键词:

总初级生产率 (GPP) 是指总初级生产率.这里是帕拉莫.随机的森林随机的森林支持矢量回归的支持矢量回归热带安第斯热带地区

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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.