Study

Actions

This study is summarised as evidence for the following.

Action Category

Allow shrubland to regenerate without active management

Action Link
Shrubland and Heathland Conservation
  1. Allow shrubland to regenerate without active management

    A replicated, randomized, controlled study between 1998 and 2008 in sagebrush scrub in Oregon, USA (Boyd & Svejcar 2011) found that allowing shrubland to recover from disturbance without any active restoration increased shrub cover to a level similar to that found in undisturbed shrublands, while annual grass cover was higher than seen in undisturbed shrublands and perennial grass cover was lower. Ten years after all vegetation was removed shrub cover had increased from 2% to 22%, similar to the cover of 24% seen in undisturbed shrublands. Over 10 years perennial grass cover increased from 0% to 10% but was still lower than the cover of 25% found in undisturbed shrubland. Annual grass cover increased from 2% to 7% and this was higher than the 2% cover seen in undisturbed shrubland. However, annual forb cover declined from 20% to 3%, similar to the cover of 1% seen in undisturbed shrubland. Perennial forb cover did not show a significant change over time (1% vs 2%) and was not significantly different from cover seen in undisturbed shrubland (1%). In 1998 all vegetation was removed from five 36 m2 plots using glyphosate herbicide with a further five plots receiving no treatment. Vegetation cover was estimated in five 0.2 m2 quadrats in each experimental plot between 1999 and 2008.

Output references
What Works in Conservation

What Works in Conservation

What Works in Conservation assesses the research looking at whether interventions are beneficial or not. It is based on summarised evidence in synopses, on topics such as amphibians, bats, biodiversity in European farmland, and control of freshwater invasive species. More are available and in progress.

More about What Works in Conservation

Download free PDF or purchase
Our Journal: Conservation Evidence

Our Journal:
Conservation Evidence

A unique, free to publish open-access journal publishing research and case studies that measure the effects of conservation actions.

Read latest volume: Volume 16

Special issues: Amphibian special issue

Go to the 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 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