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Document18 years of continuous forest monitoring; lessons learnt and experiences
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Monitoring forests is key to ensure sustainable natural resources conservation. Land cover has been the most widely used product to measure how forests has been changing. Zimbabwe first produced its national land cover map in 1992 and it has been used as the basis for forest resources monitoring. Given the power of Google earth engine, in 2017 another land cover map was produced. The twenty-five years of forest monitoring has shown a remarkable decrease in forest area due to mainly agriculture expansion. Sharing of land cover information has evolved over the years from paper based to digital platform. The Google earth engine app was produced from 2017 land cover map and it has increased the wide use of forest information and data. The change between 1992 and 2017 was obtained after subtracting the two maps. The forest loss was then analysed using Collect earth online, a total 3500 plots were analysed using high resolution satellite imagery. Keywords: Deforestation and forest degradation ID: 3486922 -
DocumentTunisia Case Study: Prepared for FAO as part of the State of the World’s Forests 2016 (SOFO) 2016
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No results found.Forests and woody vegetation cover a total surface area of 1.3 million ha in 2015 (FAO 2015) that represents 8% of the country surface area. It includes 1 million ha of forests and 0.3 Million ha of shrubs and other woody area. The forest area has increased from 643,000 ha in 1990 to 1,041,000 ha in 2015 ((FAO 2015) that corresponds to an increase by 62% in the last twenty five years or an annual increase of 1.9%. The most important programs of forest and pastoral plantation were between 1990 an d 2010, with a rhythm of plantation of 22,000 ha annually (FAO 2015), recently, during the period 2010-2014, forest and pastoral expansion concerned only 6,000 ha per year. In the other side, forest fires have affected about one thousand ha per year during the period 1996-2010, and 3167 ha per year on average during the 2011-2014. Similarly, annual deforestation has increased from 400 ha (1996-2010) to 800 ha for the period 2011-2014. It should be indicated that half of the plantation consists o n pastoral plantation. Forest and pastoral plantation is usually conducted in forest area (replanting burned areas when natural regeneration is not possible, reforestation of harvested areas, replacing shrubs (1400 ha per year; FAO 2015)), in agricultural lands (planting the banks of ravines, for soil conservation purposes and for windbreaks), and in the pastoral lands (plantation of forage species).Read the full report of the State of the World’s Forests (SOFO) 2016
Read the Brochure of the State of the World’s Forests (SOFO) 2016
Read the Flyer See the InfographicVisit the Sofo 2016 webpage.
Read the other six country case studies:
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Book (stand-alone)Global forest land-use change 1990-2005 2012This report presents the key findings on forest land use and land-use change between 1990 and 2005 from FAO’s 2010 Global Forest Resources Assessment Remote Sensing Survey. It is the first report of its kind to present systematic estimates of global forest land use and change. The ambitious goal of the Remote Sensing Survey was to use remote sensing data to obtain globally consistent estimates of forest area and changes in tree cover and forest land use between 1990 and 2005. Overall, it fou nd that there was a net decrease in global forest area between 1990 and 2005, with the highest net loss in South America. While forest area increased over the assessment period in the boreal, temperate and subtropical climatic domains, it decreased by an average of 6.8 million hectares annually in the tropics. The survey estimated the total area of the world’s forests in 2005 at 3.8 billion hectares, or 30 percent of the global land area. This report is the result of many years of planning and three years of detailed work by staff at FAO and the European Commission Joint Research Centre, with inputs from technical experts from more than 100 countries. Many of these contributors now constitute a valuable global network of forest remote sensing and land-use expertise.
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