Development of ombrotrophic raised bogs in north-east Germany 17 years after the adoption of a protective program

  • Published source details Bönsel A. & Sonneck A.-G. (2012) Development of ombrotrophic raised bogs in north-east Germany 17 years after the adoption of a protective program. Wetlands Ecology and Management, 20, 503-520.


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 site comparison study in 2007 in two bogs in Germany (Bönsel & Sonneck 2012) found that a fully rewetted bog contained more plant species, greater moss cover and greater cover of some herbs than a partially rewetted bog, but less tree and rush cover. After 10 years, there were more plant species on the fully rewetted bog (208) than the partially rewetted bog (68). The fully rewetted bog also had greater cover of mosses overall (44 vs 4%) and Sphagnum mosses (25 vs 14%). Beaked sedge Carex rostrata, purple moor grass Molinia caerulea and one of two Eriophorum cottongrass species were more abundant, relative to other plant species, in the fully rewetted bog than the partially rewetted bog (reported as an abundance index). The fully rewetted bog had less cover of rushes (19 vs 39%) and trees (22 vs 57%). Both bogs had similar cover of herbs overall (67 vs 65%) and shrubs (8 vs 6%). In 1997, drainage ditches in and around both bogs were blocked. In one bog all blockages were successful (water table 17–25 cm below peat surface) but in the other bog only some blockages were successful, so the water table was lower (40–50 cm below surface). In 2007, plant species were counted and vegetation cover estimated in 25 m2 plots: 35 on the fully rewetted and 21 on the partially rewetted bog.

    (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 20

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