Study

Soil and vegetation responses to hydrological manipulation in a partially drained polje fen in New Zealand

  • Published source details Sorrell B.K., Partridge T.R., Clarkson B.R., Jackson R.J., Chagué-Goff C., Ekanayake J., Payne J., Gerbeaux P. & Grainger N.P.J. (2007) Soil and vegetation responses to hydrological manipulation in a partially drained polje fen in New Zealand. Wetlands Ecology and Management, 15, 361-383

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 controlled, before-and-after study in 2000–2002 in a degraded fen in New Zealand (Sorrell et al. 2007) reported that following rewetting, total vegetation and upland plant cover decreased whilst wetland plant cover was stable. These results were not tested for statistical significance. Total vegetation cover declined in all four rewetted plots (before rewetting: 95–100%; one year after: 45–95%) but was stable in drained control plots (before: 92–100%; after: 90–100%). For two abundant, non-native, upland species, cover declined in all four rewetted plots (before: 5–40%; after: 0–5%) but was relatively stable in drained plots (before: 5–43%; after: 5–40%). For two abundant native species that only grow in wetlands, cover was stable in all rewetted plots (before: 22–90%; after: 24–90%) and all but one drained plot (where cover dropped from 13 to 0%). In March 2001, four plots within a fen were rewetted by blocking the main fen drain with soil dams. Nine plots remained drained. In 2000 and 2002, vegetation cover was estimated in four 4 m2 quadrats/plot.

Output references

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, terrestrial 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 17

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

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