title: Tracing decadal environmental change in ombrotrophic bogs using diatoms from herbarium collections and transfer functions.
abstract: Central European mountain bogs, among the most valuable and threatened of habitats, were exposed to intensive human impact during the 20th century. We reconstructed the subrecent water chemistry and water-table depths using diatom based transfer functions calibrated from modern sampling. Herbarium Sphagnum specimens collected during the period 1918-1998 were used as a source of historic diatom samples. We classified samples into hummocks and hollows according to the identity of dominant Sphagnum species, to reduce bias caused by uneven sampling of particular microhabitats. Our results provide clear evidence for bog pollution by grazing during the period 1918-1947 and by undocumented aerial liming in the early 90-ies. We advocate use of herbarized epibryon as a source of information on subrecent conditions in recently polluted mires.
authors.affiliation: Department of Botany, Faculty of Science, Palacký University in Olomouc, Šlechtitelů 11, CZ-78371 Olomouc, Czech Republic. aloisie.poulickova@upol.cz
authors.forename: Aloisie
authors.initials: A
authors.lastname: Poulíčková
authors.forename: Petra
authors.initials: P
authors.lastname: Hájková
authors.forename: Kateřina
authors.initials: K
authors.lastname: Kintrová
authors.forename: Romana
authors.initials: R
authors.lastname: Bat'ková
authors.forename: Markéta
authors.initials: M
authors.lastname: Czudková
authors.forename: Michal
authors.initials: M
authors.lastname: Hájek
mesh_terms: D057231:Climate Change / Q000706:statistics & numerical data*; D017377:Diatoms / Q000502:physiology*; D004784:Environmental Monitoring / Q000379:methods*; D051639:Gardening; D012987:Soil; D044003:Sphagnopsida; D053833:Wetlands
chemical_list: D012987:Soil