Global forest area disturbance from fire, insect pests, diseases and severe weather events

摘要: Reliable global data on forest degradation and disturbances due to fire, insect pests, diseases severe weather are important understand ecosystem health condition, safeguard production of goods services avoid negative impacts human livelihoods. This paper presents a analysis area affected by significant pest outbreaks, reported countries as part the Global Forest Resources Assessment 2015. Between 2003 2012, approximately 67 million hectares (1.7%) land burned annually, mostly in tropical South America Africa. In similar reporting period, total 142 were other than fire. Insect pests more 85 forest, which major was temperate North America. Severe disturbed over 38 hectares, Asia. About 12.5 be diseases, Asia Europe. There strong correlations between partial canopy cover reduction, well net loss. Partial reduction is used proxy for degradation, although it also includes under management that not degraded. A decreasing trend found, largely accounted decreased within last ten years However, an increasing found boreal climatic domain. The suitable determining any year should improved future collection exercises.