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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/5971

Title: Evaluation of bio-indication methods using epiphytes by correlating with SO2-pollution parameters
Authors: GEEBELEN, Wouter
Hoffmann, M.
Issue Date: 2001
Citation: The lichenologist, 33(3). p. 249-260
Abstract: In order to evaluate the relative usefulness of the numerous bio-indication methods that use epiphytes as indicators for air pollution, a range of these different methods was applied within the same region (Flanders, Northern Belgium). The study area shows important air pollution gradients and little climatic differentiation. Ninety-one IAP indices were calculated with data collected in the immediate vicinity of SO2 measuring stations on one randomly chosen tree, on ten neighbouring trees and in a sampling grid placed on the tree carrying the largess number of epiphytes. A large majority of indices showed a significant Spearman rank order correlation with mean SO2 winter values over the 5 years 1990-94. Indices based on a selection of 17 lichens gave better results than those based on all lichens. The latter indices showed higher correlation than those using all epiphytes (including bryophytes). Indices using a quantitative estimate of cover or abundance or a combination of these did not result in a higher correlation. Sampling ten trees gave slightly higher correlation than the grid method or sampling of one tree. Taking into account supplementary evaluation criteria (time investment and degree of lichenological knowledge required), sampling of 17 bio-indicator species using a sampling grid is recommended within the study area. Monitoring the presence of all corticolous lichens within a sampling grid is recommended in general.
URI: http://hdl.handle.net/1942/5971
DOI: 10.1006/lich.2000.0320
ISI #: 000169011500007
ISSN: 0024-2829
Category: A1
Type: Journal Contribution
Validation: ecoom, 2002
Appears in Collections: Research publications

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