Forest and other vegetation fires

The global estimate of land area affected by fire in 2000 was 350 million hectares, much of which was forest and woodland. Most of the area burned was in sub-Saharan Africa, followed at some distance by Australia (Fire management global assessment 2006).

The role of fire in the world’s vegetation is mixed. In some ecosystems natural fires are essential to maintain ecosystem dynamics, biodiversity and productivity. Fire is also an important and widely used tool to meet land management goals. However, every year, wildfires destroy millions of hectares of forest woodlands and other vegetation, causing the loss of many human and animal lives and an immense economic damage, both in terms of resources destroyed and the costs of suppression. There are also impacts on society and the environment – for example, damage to human health from smoke, loss of biological diversity, release of  greenhouse gases, damage to recreational values and infrastructure.

Most fires are caused by people. The list of human-induced causes include land clearing and other agricultural activities, maintenance of grasslands for livestock management, extraction of non-wood forest products, industrial development, resettlement, hunting, negligence and arson. Only in very remote areas of Canada and Russian Federation lightning is a major cause of fires.

There is evidence from some regions that the trend is towards more fires affecting a larger area and burning with greater severity, while the risk of fire may be increasing under climate change in association with land-use changes and institutional constrains on sustainable forest and fire management.

Better landscape management needed to prevent wildfires

From an assessment of megafires  it was concluded that the main contributing elements of these wildfires are drought, fire meteorology, accumulation of fuel and homogenous or fire prone landscapes, which are often caused by lack of appropriate land management. 

Preventive landscape management is there for needed and should include policy, cultural, technical, social, financial, organizational, and economical and market aspects. 

For instance, large homogeneous forests and housing areas shouldn’t be established in regions with fire-prone vegetation, but different land uses should be combined to maintain mosaic features in the landscape with natural firebreaks.

Special attention should be paid to timing of certain agricultural activities e.g agricultural burnings should take place before the dry season and before the surrounding landscapes turn fire-prone. Burnings should also be avoided during the high winds and hottest time of the day. At the same time alternatives for agriculture fires might be developed.

Local populations should be involved through participatory and/or community based approaches because they are often main actors in landscape management activities, they suffer directly from the fires which threaten their livelihoods and might also be involved in some of the fire causes.

Integrated fire management

FAO has coordinated the development of the Fire Management Voluntary Guidelines aimed at helping countries develop an integrated approach to fire management, from prevention and preparedness to suppression and restoration.

The FAO Guidelines advise authorities and other stakeholder groups that fire-fighting should be an integral part of a coherent and balanced policy applied not only to forests but also across other land-uses on the landscape. 

More attention should also be given to monitoring wildfire GHG emissions as a potential contributor to climate change.

News

Field measurements of trace gases and aerosols emitted by peat fires in Central Kalimantan, Indonesia during the 2015 El Niño 17 June 2016 Wildfires in Indonesia continue to recur and generate enormous impacts within the country as well as in the region on human health and well-being, trade and transport. The World Bank Indonesia Economic Quarterly December 2015 reported that the fires have constrained GDP growth and cost “an estimated IDR 221 trillion – more than twice the reconstruction cost after the 2004 Aceh tsunami” - Emerging research carried out by Indonesian and US academic institutions has provided refined estimates of the emissions from peat fires, suggesting less overall GHG emissions and identifying additional gases that pose health risks [more]
Peter Moore on the devastating wildfire in boreal forests of Alberta, Canada 10 May 2016 Interview with FAO’s forest fire expert Peter Moore, about the huge wildfire raging in Alberta, Canada in early May 2016. [more]

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last updated:  Friday, September 2, 2016