Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4427721 | Environmental Pollution | 2007 | 12 Pages |
Abstract
This study investigated the distribution and diversity of epiphytes in London in relation to NOx using fine-scale atmospheric dispersion modelling. The survey recorded over 3000 epiphytes from 334 trees (Fraxinus excelsior) representing 74 lichen, 14 moss, 7 fungal and 3 algal species. There was a significant inverse relationship between diversity and NOx. Diversity declined where NOx exceeded 70 μg m−3 and NO2 exceeded 40 μg m−3, suggesting a phytotoxic effect. However, there was a significant positive relationship between NOx and lichen abundance due to the ubiquitous distribution of pollution tolerant species, mainly associated with eutrophication. A scale of lichen sensitivity to NOx has been derived.
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Authors
L. Davies, J.W. Bates, J.N.B. Bell, P.W. James, O.W. Purvis,