Botanical data analysis 2013


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 before-and-after study in 2006–2013 seven degraded peatlands in England, UK (Glendinning & Hand 2014) reported that following rewetting, plant community types and purple moor grass Molinia caerulea abundance typically did not change, but Sphagnum mosses became more abundant. These results were not tested for statistical significance. Initially, all seven sites contained wet heath plant communities. After 2–6 years, four rewetted sites were still wet heaths but three had developed peatland plant communities. Purple moor grass abundance was similar (present in 95–100% of quadrats) before and after rewetting in all sites. Sphagnum moss species became more abundant after rewetting in most (21 of 34) comparisons. Abundance of blunt-leaved bog moss Sphagnum palustre consistently increased (six of six comparisons). Sedge Carex spp. and common cottongrass Eriophorum angustifolium abundance showed mixed responses depending on species and site. Between 2008 and 2013, one drainage ditch was blocked in each of seven peatlands. Vegetation (species presence/absence) was recorded before ditch blocking and 3–7 years after. In each site 120–160 quadrats (0.25 m2), arranged along a 30–40 m transect perpendicular to the blocked ditch, were surveyed in summer or autumn.

    (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