Triin Triisberg, Edgar Karofeld, Jaan Liira and Jaanus Paal
Proceedings of the 14th International Peat Congress
environmental-variables, landscape-scale, propagules, time
Theme V. Restoration, rehabilitation and after-use of disturbed peatlands
To reveal the regularities and driving factors in re-vegetation we synthesized the results of inventory data from 64 extracted peatlands from all over Estonia (carried out by the Estonian Geological Survey) and the results of a fresh seed bank study from greenhouse experiments with peat blocks from three extracted peatlands. In the flat areas the species number is positively correlated with the time elapsed since the cessation of mining. In ditches, the re-vegetation is largely influenced by the depth of the well decomposed peat layer. The number of species, accumulated from the seed rain during last year, was similar in edges and centres, but there was a difference in species composition. Fertilization had a larger effect on species composition than on species number.