Study

Actions

This study is summarised as evidence for the following.

Action Category

Use selective harvesting/logging instead of clearcutting

Action Link
Bird Conservation

Clear or open patches in forests

Action Link
Bird Conservation
  1. Use selective harvesting/logging instead of clearcutting

    In oak-hickory forest in the Missouri Ozarks, USA, in 1991-2000, a replicated, randomised, controlled study (Gram et al. 2003) found no consistent differences in bird community responses to even- (i.e. clearcutting) and uneven-aged (i.e. selection cutting) management. However, some mature-forest species, such as overbirds Seiurus aurocapillus were less common on even-aged sites, whilst some early-successional species were more common on these sites. This study is discussed in more detail in ‘Clear or open patches in forests’.

     

  2. Clear or open patches in forests

    In oak-hickory forest in the Missouri Ozarks, USA, in 1991-2000, a replicated, randomised, controlled study (Gram et al. 2003) found that early successional species increased in response to even- (i.e. clearcutting) and uneven-aged (i.e. selection cutting) management, whereas mature forest species declined. Mature forest bird abundance declined as trees were removed, with harvest disturbance affecting densities of some species in adjacent forest for three years or more. Nest success (average of 29% for all species) did not change after treatment. Each of nine sites was randomly assigned even- or uneven-aged treatment (undertaken May 1996 to May 1997) with a patch of about 10% of each site left uncut. The two treatments are compared in ‘Use selective harvesting/logging instead of clearcutting’.

     

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.

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