New stomatal flux-based critical levels for ozone effects on vegetation
New stomatal flux-based critical levels for ozone effects on vegetation
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DOI：
10.1016/j.atmosenv.2011.06.009
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发表时间：
2011-09-01
影响因子：
5
通讯作者：
Simpson, David
中科院分区：
文献类型：
--
作者：
Mills, Gina;Pleijel, Hakan;Simpson, David
LRTAP 公约已经审查和修订了臭氧对植被影响的临界水平。基于累积的臭氧气孔通量（POD gamma，植物毒性臭氧剂量高于 Y nmol m(-2) PLA s(-1) 阈值通量，其中 PLA 是预计叶面积）已商定八个新的或修订的临界水平。对于每种受体，数据均来自于 2-4 个国家在自然波动的环境条件下进行的实验，从而与每种受体特有的反应变量形成线性剂量反应关系（r(2) = 0.49-0.87，p < 0.001）。对于农作物，得出了对小麦（谷物产量、谷物质量和蛋白质产量）、马铃薯（块茎产量）和番茄（果实产量）影响的临界水平。对于森林树木，得出了对山毛榉、桦木和挪威云杉全树生物量年增量变化影响的临界水平。对于（半）自然植被，对生产性和高保护价值的多年生草原影响的临界水平是基于对三叶草属（三叶草物种）的重要组成物种的影响。这些临界水平可用于评估臭氧对粮食安全、林木提供的重要生态系统服务（圆木生产、碳封存、土壤稳定性和防洪）以及牧场活力的破坏性影响。 (C) 2011 Elsevier Ltd. 保留所有权利。
The critical levels for ozone effects on vegetation have been reviewed and revised by the LRTAP Convention. Eight new or revised critical levels based on the accumulated stomatal flux of ozone (POD gamma, the Phytotoxic Ozone Dose above a threshold flux of Y nmol m(-2) PLA s(-1), where PLA is the projected leaf area) have been agreed. For each receptor, data were combined from experiments conducted under naturally fluctuating environmental conditions in 2-4 countries, resulting in linear dose response relationships with response variables specific to each receptor (r(2) = 0.49-0.87, p < 0.001 for all). For crops, critical levels were derived for effects on wheat (grain yield, grain mass, and protein yield), potato (tuber yield) and tomato (fruit yield). For forest trees, critical levels were derived for effects on changes in annual increment in whole tree biomass for beech and birch, and Norway spruce. For (semi-)natural vegetation, the critical level for effects on productive and high conservation value perennial grasslands was based on effects on important component species of the genus Trifolium (clover species). These critical levels can be used to assess protection against the damaging effects of ozone on food security, important ecosystem services provided by forest trees (round-wood production, C sequestration, soil stability and flood prevention) and the vitality of pasture. (C) 2011 Elsevier Ltd. All rights reserved.