Relationships of ozone exposure to pine injury in the Sierra Nevada and San Bernardino Mountains of California, USA
Relationships of ozone exposure to pine injury in the Sierra Nevada and San Bernardino Mountains of California, USA
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DOI：
10.1016/s0269-7491(98)00027-x
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发表时间：
1998-01-01
影响因子：
8.9
通讯作者：
Procter, T
中科院分区：
文献类型：
--
作者：
Arbaugh, MJ;Miller, PR;Procter, T
在加州的Sierra内华达州和圣贝纳迪诺山区收集了每小时的环境臭氧暴露数据和树冠损伤测量值，以建立美国黄松的臭氧损伤指数（OII）、森林害虫管理指数（FPM）、褪绿斑驳、纤维束保留（OII指数组分）和累积环境臭氧指数之间的关系。和美国赤松Pinus jeffreyi Grev.还有Balf 11个地点位于周围的臭氧监测点附近的针叶混交林每年进行评估，为期4年。对圣贝纳迪诺山区的其他四个地点进行了为期1年的评价。分析表明，OII在功能上与FPM相当（r（2）= 0.96），并且仅取决于第四轮的束保持和褪绿斑驳（R-2 = 0.95）（或者如果在该地点不存在四轮，则大多数树木存在最后一轮）。OII和4年24小时之间存在显著相关性。夏季SUMO、SUM 06、W126和HRS 80臭氧指数。三个网站有较高水平的累积褪绿斑驳的个人轮和大量的树木与可见的树冠损伤比其他网站具有类似的累积环境臭氧水平。包括一个指标变量来区分这两组网站增加R-2和降低均方根（RMSE）的所有指标，特别是SUMO（R-2 = 0.93，RMSE降低了46%）。(C)1998由Elsevier Science Ltd.出版。保留所有权利。
Hourly ambient ozone exposure data and crown injury measurements were gathered in the Sierra Nevada and San Bernardino Mountains of California to develop relationships between the Ozone Injury Index (OII), the Forest Pest Management Index (FPM), chlorotic mottle, fascicle retention (OII index components) and cumulative ambient ozone indices for Pinus ponderosa Dougl. ex Laws and Pinus jeffreyi Grev. and Balf. Eleven sites located in the mixed conifer forest near ambient ozone monitoring sites were evaluated annually for 4 years. Four other sites in the San Bernardino Mountains were evaluated for 1 year. Analyses showed OII to be functionally equivalent ( r(2) = 0.96) to the FPM, and to depend only on fascicle retention and chlorotic mottle (R-2 = 0.95) of the fourth whorl (or if four whorls are not present at the site, then the last whorl present for the majority of trees). Significant associations were found between OII and 4-year 24-h. summer SUMO, SUM06, W126 and HRS80 ozone indices. Three sites had higher levels of cumulative chlorotic mottle for individual whorls and larger numbers of trees with visible crown injury than other sites with similar cumulative ambient ozone levels. Including an indicator variable to discriminate between these two groups of sites increased R-2 and decreased root mean square (RMSE) for all indices, especially SUMO (R-2 = 0.93, RMSE reduced by 46%). (C) 1998 Published by Elsevier Science Ltd. All rights reserved.