Study

Rewetting of drained boreal spruce swamp forests results in rapid recovery of Sphagnum production

  • Published source details Maanavilja L., Kangas L., Mehtätalo L. & Tuittila E.-S. (2015) Rewetting of drained boreal spruce swamp forests results in rapid recovery of Sphagnum production. Journal of Applied Ecology, 52, 1355-1363.

Actions

This study is summarised as evidence for the following.

Action Category

Rewet peatland (raise water table)

Action Link
Peatland Conservation
  1. Rewet peatland (raise water table)

    A replicated site comparison study in 2011–2012 in 36 forested fens in Finland (Maanavilja et al. 2015) found that in rewetted sites, Sphagnum moss growth was greater than in drained sites, and similar to undrained sites. After 3–16 years, Sphagnum biomass growth in rewetted sites (147 g/m2/year) was significantly greater than in sites that remained drained (76 g/m2/year) and not significantly different to never-drained sites (128 g/m2/year). The same was true for length growth (rewetted: 6; drained: 3; never-drained: 5 g/m2/year). Of the 36 forested fens studied, 18 had been rewetted in 1995–2008 by filling or blocking drainage ditches, nine remained drained (ditches open) and nine had never been drained. In May 2011, nine 13 x 13 cm plastic nets were installed on the rewetted peat in each site. In May 2012, all Sphagnum growing above each net was harvested, then dried and weighed. Stem length was measured for 20 shoots/net. This study used the same sites as (30).

    (Summarised by: Nigel Taylor)

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 19

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust