Action

Use herbicides to thin trees

How is the evidence assessed?

Source countries

Key messages

  • One replicated, controlled study in Canada found no effect of using herbicide to thin pine trees on total plant species richness.

 

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 replicated, controlled study in 1993-1998 in temperate lodgepole pine Pinus contorta forest in British Columbia, Canada (Sullivan et al. 2002) found no effect of using herbicide to thin lodgepole pine on total tree density or on total plant species richness. There was no effect of herbicide on the number of trees (herbicide: 4,180; control: 7,648/ha) or number of plants species (herbicide: 24; control: 23/treatment unit). Data were collected in 1998 in herbicide (using glyphosate herbicide to retain 1,000 stems/ha) and control treatment units (2-13 ha). Units were established in 1993 in each of three study areas.

    Study and other actions tested
Please cite as:

Agra H., Schowanek S., Carmel Y., Smith R.K. & Ne’eman G. (2019) Forest Conservation. Pages 331-347 in: W.J. Sutherland, L.V. Dicks, N. Ockendon, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2019. Open Book Publishers, Cambridge, UK.

 

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Forest Conservation

This Action forms part of the Action Synopsis:

Forest Conservation
Forest Conservation

Forest Conservation - Published 2016

Forest synopsis

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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