The effects of stand structure on ground-floor bryophyte assemblages in temperate mixed forests |
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Authors: | S Márialigeti B Németh F Tinya P Ódor |
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Institution: | 1. Department of Plant Taxonomy and Ecology, Loránd E?tv?s University, Pázmány P. stny. 1/C, 1117, Budapest, Hungary 2. Department of Plant Pathology, Corvinus University of Budapest, Ménesi út 44, 1118, Budapest, Hungary
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Abstract: | The effect of tree species composition, stand structure characteristics and substrate availability on ground-floor bryophyte
assemblages was studied in mixed deciduous forests of Western Hungary. Species composition, species richness and cover of
bryophytes occurring on the soil and logs were analysed as dependent variables. The whole assemblage and functional groups
defined on the basis of substrate preference were investigated separately. Substrate availability (open soil, logs) was the
most prominent factor in determining species composition, cover and diversity positively, while the litter of deciduous trees
had a negative effect on the occurrence of forest floor bryophytes. Besides, bryophyte species richness increased with tree
species and stand structural diversity, and for specialist epiphytic and epixylic species log volume was essential. Sapling
density and light heterogeneity were influential on bryophyte cover, especially for the dominant terricolous species. Many
variables of the forest floor bryophyte community can be estimated efficiently by examining stand structure in the studied
region. Selective cutting increasing tree species diversity, stand structural heterogeneity and dead wood volume can maintain
higher bryophyte diversity in this region than the shelter-wood system producing even-aged, monodominant, structurally homogenous
stands. |
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Keywords: | Species composition Species richness Diversity Functional groups Forest structure |
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