Study

Actions

This study is summarised as evidence for the following.

Action Category

Use prescribed burning

Action Link
Bat Conservation

Thin trees within forest and woodland

Action Link
Bat Conservation
  1. Use prescribed burning

    A replicated, controlled, site comparison study in 2001–2002 in nine pine forest sites in South Carolina, USA (Loeb & Waldrop 2008) found that burned tree stands had similar activity of three bat species to unburned control tree stands, and two bat species had higher activity in thinned stands than burned stands. Activity of big brown bats Eptesicus fuscus, eastern red bats Lasiurus borealis and eastern pipistrelles Perimyotis subflavus did not differ significantly between burned tree stands (big brown bats: average 0.3 bat passes/night; red bats: 0.3 bat passes/night; eastern pipistrelles: 0.1 bat passes/night) and unburned control stands (big brown bats: 0.1 bat passes/night; red bats: 0.5 bat passes/night; eastern pipistrelles: 0.1 bat passes/night). Activity was significantly higher in thinned tree stands than burned stands for big brown bats (1.2 bat passes/night) and eastern red bats (0.7 bat passes/night), but similar for eastern pipistrelles (0.4 bat passes/night). Nine 14 ha stands (loblolly pine Pinus taeda and shortleaf pine Pinus echinata) were surveyed with three replicates of three treatment types: thinning to 18 m2/ha (in winter 2000–2001), prescribed burning (burned in April 2001 with strip head fire and flanking fires), and a control with no treatment. Bat activity was sampled with two bat detectors at random points in each of 12 stands for two full nights/month from May–August 2001 and 2002.

  2. Thin trees within forest and woodland

    A replicated, controlled, site comparison study in 2001–2002 of nine pine forest sites in South Carolina, USA (Loeb & Waldrop 2008) found that thinned tree stands had higher activity for two of three bat species than unthinned control tree stands. Activity of big brown bats Eptesicus fuscus and eastern red bats Lasiurus borealis was significantly higher in thinned tree stands (big brown bats: average 1.2 bat passes/night; eastern red bats: 0.7 bat passes/night) than in unthinned control stands (big brown bats: 0.1 bat passes/night; eastern red bats: 0.5 bat passes/night) or burned stands (big brown bats: 0.3 bat passes/night; eastern red bats: 0.3 bat passes/night). Activity of eastern pipistrelles Perimyotis subflavus did not differ significantly between thinned (0.4 bat passes/night), unthinned (0.1 bat passes/night) or burned stands (0.1 bat passes/night). Nine 14 ha stands (loblolly pine Pinus taeda and shortleaf pine Pinus echinata) were surveyed with three replicates of three treatment types: thinning to 18 m2/ha (in winter 2000–2001), prescribed burning (burned in April 2001 with strip head fire and flanking fires), and a control with no treatment. Bat activity was sampled with two bat detectors at random points in each of 12 stands for two full nights/month in May–August 2001 and 2002.

Output references
What Works in Conservation

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