Provide or maintain hedgerows on farmland

How is the evidence assessed?
  • Effectiveness
    not assessed
  • Certainty
    not assessed
  • Harms
    not assessed

Study locations

Key messages

  • One study evaluated the effects of providing or maintaining linear features on reptile populations. This study was in Madagascar.


  • Community composition (1 study): One site comparison study in Madagascar found that reptile communities in cultivated areas with hedges were more similar to those found in forests than were communities from cultivated areas without hedges. The study also found that more reptile species were found only areas with hedges than only in areas without hedges.



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 in two sites of tropical dry forest and farmland in south-western Madagascar (Nopper et al. 2017) found that a site with hedges throughout different habitats had smaller differences in reptile communities than those without hedges, and that cultivated areas with hedges had more species than cultivated areas without hedges. The similarity of reptile communities in cultivated areas, undegraded forest and degraded forest was higher in the site with hedges than in the site without hedges (result reported as a dissimilarity index). Nine species were found in cultivated areas with hedges (1–19 individuals) that were not found in cultivated areas with no hedges, whereas the opposite was true for only two species (1–3 individuals). Two sites were selected that contained undegraded forest, degraded forest and cultivated areas. In one site, hedges (2 m high, containing non-native Opuntia spp. and native vegetation e.g. Euphorbia stenoclada) surrounded cultivated areas and bordered degraded forest. The other site had no hedges. Eight 100 m transects were established in each habitat, and all reptile species were recorded within 1.5 m of the transect line (10 surveys in February–April 2012). In cultivated areas transects followed field boundaries with or without hedging.

    Study and other actions tested
Please cite as:

Sainsbury K.A., Morgan W.H., Watson M., Rotem G., Bouskila A., Smith R.K. & Sutherland W.J. (2021) Reptile Conservation: Global Evidence for the Effects of Interventions for reptiles. Conservation Evidence Series Synopsis. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Reptile Conservation

This Action forms part of the Action Synopsis:

Reptile Conservation
Reptile Conservation

Reptile Conservation - Published 2021

Reptile synopsis

What Works 2021 cover

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