Individual study: Specialist butterflies benefit most from the ecological restoration of mires
Noreika N., Kotze D.J., Loukola O.J., Sormunen N., Vuori A., Päivinen J., Penttinen J., Punttila P. & Kotiaho J.S. (2016) Specialist butterflies benefit most from the ecological restoration of mires. Biological Conservation, 196, 103-114
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Cut/remove/thin forest plantations and rewet peat
A replicated, paired, before-and-after, site comparison study in 2003–2007 in nine bogs and fens in Finland (Noreika et al. 2016) reported that a combination of tree thinning and rewetting reduced the number of tall trees for 1–3 years. Areas that were rewetted and cleared of trees contained fewer tall (>3 m) trees 1–3 years after restoration than before. Thus, the number of tall trees in restored areas became more like natural areas and less like degraded areas. Data were reported as graphical analyses and differences were not tested for statistical significance. Between 2003 and 2006, in each of nine peatlands, one area previously drained for forestry was restored by removing excess trees (above the natural tree density) and blocking drainage ditches. This was compared to one area that remained degraded (drained and fully forested) and one pristine area (never drained, sparsely forested). In 2003 (before intervention) and 2007, trees were counted and measured in six 100 m2 plots/area (18 plots/peatland). This study was based on the same experimental set-up as (9).
(Summarised by Nigel Taylor)