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Providing evidence to improve practice

Action: Remove burned trees Forest Conservation

Key messages

  • One replicated, controlled study in Israel1 found that removing burned trees increased total plant species richness. One replicated, controlled study in Spain2 found that removal increased the cover and species richness of some plant species.

 

Supporting evidence from individual studies

1 

A replicated, controlled study in 1989-1993 in Aleppo pine Pinus halepensis forest in Israel (Ne'eman, Lahav & Izhaki 1995) found that clearing burned trees increased plant species richness. The number of species was higher in cleared than untreated plots (cleared: 196; twigs remaining: 192; untreated: 185/0.49 ha plot). Data were collected in 1993 in five plots (0.49 ha) of each of three treatments: cleared (burned trees cut down, trunks and smaller twigs removed), twigs (smaller twigs left) and control (untreated). Plots were all in an area totally burnt down in September 1989. Treatments were carried out in September-November 1990.

 

2 

A replicated, controlled study in 1991-1994 in maritime pine Pinus pinaster woodland in Spain (Pérez & Moreno 1998) found that removing burned trees increased the cover and species richness of legumes but not of all herbaceous plants, or of the dominant shrub gum rockrose Cistus ladanifer. Legume cover (removed: 7-29%; control: 3-26%) and species richness (removed: 3-6; control: 2-5/plot) were higher in removal plots. There were no differences between treatments for: total herbaceous cover (removed: 8-47%; control: 3-49%), species richness (removed: 5-16; control: 6-14), gum rockrose cover (removed: 8%-25%; control: 10%-46%) and gum rockrose density (removed: 1-5; control: 5-11/m2). Data were collected in 12 removal plots (burned trees removed after fire) and 12 control plots (trees not removed, 5 × 5 m). Treatments were three years after the entire study site was burned by wildfire fire in 1991.

 

Referenced papers

Please cite as:

Agra H., Schowanek S., Carmel Y., Smith R.K. & Ne’eman G. (2018) Forest Conservation. Pages 285-328 in: W.J. Sutherland, L.V. Dicks, N. Ockendon, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2018. Open Book Publishers, Cambridge, UK.