Tree and stand level variables influencing diversity of lichens on temperate broad-leaved trees in boreo-nemoral floodplain forests |
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Authors: | Inga Jüriado Jaan Liira Jaanus Paal Ave Suija |
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Institution: | (1) Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St., 51005 Tartu, Estonia;(2) Natural History Museum of the University of Tartu, 38 Lai St., 51005 Tartu, Estonia |
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Abstract: | Tree and stand level variables affecting the species richness, cover and composition of epiphytic lichens on temperate broad-leaved
trees (Fraxinus excelsior, Quercus robur, Tilia cordata, Ulmus glabra, and U. laevis) were analysed in floodplain forest stands in Estonia. The effect of tree species, substrate characteristics, and stand and
regional variables were tested by partial canonical correspondence analysis (pCCA) and by general linear mixed models (GLMM).
The most pronounced factors affecting the species richness, cover and composition of epiphytic lichens are acidity of tree
bark, bryophyte cover and circumference of tree stems. Stand level characteristics have less effects on the species richness
of epiphytic lichens, however, lichen cover and composition was influenced by stand age and light availability. The boreo-nemoral
floodplain forests represent valuable habitats for epiphytic lichens. As substrate-related factors influence the species diversity
of lichens on temperate broad-leaved trees differently, it is important to consider the effect of each tree species in biodiversity
and conservation studies of lichens.
Nomenclature Randlane et al. (2007) for lichens; Leht (2007) for vascular plants. |
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Keywords: | Bark pH Bryophytes Circumference Epiphytes Floodplain forest Species richness Stand age Temperate broad-leaved trees |
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