Journal
ENVIRONMENTAL POLLUTION
Volume 135, Issue 1, Pages 111-119Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2004.09.021
Keywords
air pollution; bark chemistry; forest dieback; forest ecology; sternflow chemistry
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Based on literature data, epiphytic lichen abundance was comparably studied in montane woodlands on healthy versus dead or dying conifers of Europe and North America in areas with different levels of atmospheric pollution. Study sites comprised Picea abies forests in the Harz Mountains and in the northern Alps, Germany, Picea rubens-Abies balsamea forests on Whiteface Mountain, Adirondacks, New York, U.S.A. and Picea engelmannii-Abies lasiocarpa forests in the Salish Mountains, Montana, U.S.A. Detrended correspondence analysis showed that epiphytic lichen vegetation differed more between healthy and dead or dying trees at high-versus low-polluted sites. This is attributed to greater differences in chemical habitat conditions between trees of different vitality in highly polluted areas. Based on these results, a hypothetical model of relative importance of site factors for small-scale variation of epiphytic lichen abundance versus atmospheric pollutant load is discussed. (C) 2004 Elsevier Ltd. All rights reserved.
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