Study

Structure and composition changes following restoration treatments of longleaf pine forests on the Gulf Coastal Plain of Alabama

  • Published source details Outcalt K.W. & Brockway D.G. (2010) Structure and composition changes following restoration treatments of longleaf pine forests on the Gulf Coastal Plain of Alabama. Forest Ecology and Management, 259, 1615-1623

Actions

This study is summarised as evidence for the following.

Action Category

Use prescribed fire: effect on understory plants

Action Link
Forest Conservation

Thin trees within forests: effects on understory plants

Action Link
Forest Conservation
  1. Use prescribed fire: effect on understory plants

    A replicated, randomized, controlled study in 2002-2005 in temperate coniferous forest in Alabama, USA (Outcalt & Brockway 2009) found that prescribed fire decreased the density of understory shrubs and trees and increased the cover of grasses. The density of small hardwoods (<3 cm diameter at breast height) (burned: ~300; unburned: >1,500 trees/ha) and cover of tall shrubs (>1.4 m) (burned: 10%; unburned: 33%) were higher in unburned plots. The cover of grasses was higher in burned plots (burned: 20%; unburned: 7%) and the cover of short shrubs (<1.4 m) (45-57%) and forbs (3-10%) was similar between treatments. Control (unburned) and burned (prescribed burned in 2002 and 2004) treatment units were replicated in three blocks. Data were collected in 2005 in ten 20 × 50 m subplots within each treatment unit.

     

  2. Thin trees within forests: effects on understory plants

    A replicated, randomized, controlled study in 2002-2008 in temperate coniferous forest in Alabama, USA (Outcalt & Brockway 2010) found that thinning decreased the density of understory shrubs and trees and increased the cover of grasses. Density (stems/ha) of hardwood trees <3 cm DBH (thinned: <50; unthinned: >1,500) and cover of shrubs >1.4 m tall (thinned: <1%; unthinned: 33%) were higher in control plots, while cover of grasses (thinned: 20%; unthinned: 7%) was higher in thinned plots. Cover of shrubs <1.4 m tall (~55%) and forbs (3%-8%) were similar between treatments. Unthinned and thinned (leaving 11.5–13.5 m2 basal area of longleaf pine Pinus palustris, removing hardwoods and other pines) treatment units (12 ha) were replicated in three blocks. Thinning was in April 2002. Data were collected in 2005 in ten 20 × 50 m subplots within each treatment unit.

     

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 18

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