Action

Action Synopsis: Bat Conservation About Actions

Manage forest and woodland to encourage understorey growth

How is the evidence assessed?
  • Effectiveness
    60%
  • Certainty
    20%
  • Harms
    0%

Source countries

Key messages

  • One study evaluated the effects of managing forest and woodland to encourage understorey growth on bat populations. The study was in Germany.

COMMUNITY RESPONSE (1 STUDY)

  • Richness/diversity (1 study): One paired sites study in Germany found more bat species and higher bat diversity in a forest managed to encourage understorey growth than in a managed forest without understorey growth.

POPULATION RESPONSE (1 STUDY)

  • Abundance (1 study): One paired sites study in Germany found higher overall bat activity (relative abundance) in a forest managed to encourage understorey growth than in a managed forest without understorey growth.

BEHAVIOUR (0 STUDIES)

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A site comparison study in 2012–2013 of two forest sites in Brandenburg, Germany (Starik et al. 2018) found that a forest managed to encourage understorey growth had higher overall bat activity and more bat species than a managed forest without understorey growth. Overall bat activity (of 11 bat species), the number of bat species recorded and bat diversity (reported as diversity indices) were higher in the forest with understorey growth (average 1.2 bat passes/hour, 3 bat species/night) than the forest without understorey growth (average 0.3 bat passes/hour, 2 bat species/night). One site (1 ha) was sampled in each of two managed forests, a Scots pine Pinus sylvestris monoculture stand without understorey and a Scots pine stand with pedunculate oak Quercus robur in the understorey. Sites were selected to ensure they were a similar distance to settlements, water bodies and other land use types. At each of two sites, two bat detectors recorded bat activity simultaneously over a total of 37 nights in May–October 2012 and April–October 2013.

    Study and other actions tested
Please cite as:

Berthinussen, A., Richardson, O.C. & Altringham, J.D. (2020) Bat Conservation. Pages 65-135 in: W.J. Sutherland, L.V. Dicks, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2020. Open Book Publishers, Cambridge, UK.

 

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Bat Conservation

This Action forms part of the Action Synopsis:

Bat Conservation

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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