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预测臭氧对树长期生长的影响,利用在田间室中种植的苗木开发的响应功能

Jeffrey D Herrick¹, S Douglas Kaylor¹, Jean-Jacques B Dubois¹

¹United States Environmental Protection Agency, Office of Research and Development, Center for Public Health and Environmental Assessment, North Carolina, USA.

Global change biology

|December 21, 2024

概括

有控制的树木研究准确地预测了热层臭氧 (O3) 在11年内对森林生长的影响. 这一发现证实了使用苗木数据来评估大树和生态系统对O3污染的风险.

科学领域:

环境科学环境科学
生态生态学生态生态学
植物生理学植物生理学

背景情况:

热带层臭氧 (O3) 是一个重要的空气污染物,对生态系统产生影响.
开放式室 (OTC) 用于研究O3对树苗的影响,但它们对成熟树的适用性是不确定的.
评估O3风险需要准确的暴露-反应数据,用于各种树种.

研究的目的:

评估O3暴露-响应模型的预测准确度,这些模型是从苗木研究中得出的,当应用到成熟树木时.
为了确定在受控苗木实验中观察到的O3效应是否转化为自然森林环境中的长期影响.
为了验证OTC衍生数据在美国O3风险评估中的使用.

主要方法:

利用了来自 (Populus tremuloides) 苗木OTC研究中的O3暴露-反应关系.
应用了这些关系来预测11年的阿斯面孔自由空气O3暴露实验的增长.
从阿斯 FACE 实验获得的个体树木生长数据和每小时 O3 暴露数据.
计算的年度O3暴露指标与苗木研究中使用的标准一致.

主要成果:

一个简单的经验模型,用OTC苗木数据进行参数化,准确地预测了Aspen FACE树在11年内地面生物质损失的百分比.
在实验的早期确定了O3暴露的影响,并在后来的几年里持续而没有恶化.
该研究表明,O3对不同实验持续时间和规模的树木生长的影响是一致的.

结论:

来自OTC苗木研究的O3暴露-反应关系可靠地推断对较大,成熟树木的影响.
场外实验为估计O3污染对森林生态系统的风险提供了有效的基础.
调查结果支持对现有的经验模型充满信心地用于国家O3风险评估.

关键词:

在面对面,面对面.空气污染空气污染在阿斯 (Aspen) 这里.生物质的生物质是生物质.暴露-反应暴露-反应暴露-响应建模的暴露-响应建模.开放顶部的室内室.臭氧层中的臭氧.树的生长树的生长树的生长

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