کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4425683 1309111 2009 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visible injury, crown condition, and growth responses of selected Italian forests in relation to ozone exposure
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Visible injury, crown condition, and growth responses of selected Italian forests in relation to ozone exposure
چکیده انگلیسی

The impact of ozone on forest ecosystems in Italy is monitored within the CONECOFOR programme. Ozone levels are measured in 30 plots using passive samplers. Response parameters used are: crown condition (transparency), BAI (basal area increment), and visible symptoms on spontaneous vegetation. Levels of AOT40 are above the concentration-based critical level of 5 ppmh in all sites, but the evidence of impact on forest vegetation remains limited. Ozone is a predictor of crown transparency residuals in beech sites over two consecutive years, but the variance explained amounts to less than 10%. The relation between BAI reduction and ozone is even less certain. Transparency and BAI are more readily explainable in terms of ecological conditions of the site and climate fluctuations. The interpretation of visible symptoms is doubtful, and is conditioned by the prevailing ecological factors in the areas.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 157, Issue 5, May 2009, Pages 1427–1437
نویسندگان
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