The Experts below are selected from a list of 258 Experts worldwide ranked by ideXlab platform
Alan Grainger - One of the best experts on this subject based on the ideXlab platform.
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an evaluation of the fao tropical Forest Resource Assessment 1990
The Geographical Journal, 1996Co-Authors: Alan GraingerAbstract:The UN Food and Agriculture Organization's latest Assessment of tropical Forest Resources in 1990, gives unreliable estimates of Forest areas and deForestation rates in the humid tropics. Estimates for tropical rain Forest are too low and statistics in the report cannot be used to derive estimates for tropical moist Forest. Comparability with previous Assessments is limited; the map used to divide tropical Forest cover into different Forest types is flawed; and the reliability of many estimates is further constrained by being based on outdated national surveys and modelling adjustments rather than a special pantropical remote sensing survey.
O Panferov - One of the best experts on this subject based on the ideXlab platform.
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a national level Forest Resource Assessment for burkina faso a field based Forest inventory in a semiarid environment combining small sample size with large observation plots
Forest Ecology and Management, 2011Co-Authors: Christoph Fischer, Christoph Kleinn, Lutz Fehrmann, Hans Fuchs, O PanferovAbstract:Abstract Even though considerable parts of the global tropical Forests are located in Africa, reliable data on African Forest Resources is limited. While this is widely recognized for tropical moist Forests, it also holds for tropical dry Forests. To partially fill the gap a Forest inventory was carried out in Burkina Faso, West Africa. In this paper we present a methodological approach and sample based estimates of the tree and Forest Resources including estimates of (1) land cover classes, (2) species composition, and (3) above ground tree carbon stocks. Following the land classification of the Food and Agriculture Organization of the United Nations (FAO), the Forest cover of Burkina Faso was estimated as 42.6% (116,847 km 2 ). For the classes “other wooded land”, “other land” and “other land with tree cover” the estimates were 1.6%, 53.6%, and 9.1%, respectively. We found notable differences to the estimates published by FAO, in particular when considering the classes “Forest” and “other wooded land” separately, but lesser so when the two classes are combined. That points to a major issue in applying these class definitions in semiarid environments. Given the relatively small sample size ( n = 46 field observed plots), relative standard errors (SE%) of area estimates are high (around 9% for the larger area classes). Aboveground tree carbon stocks were estimated to be 6.640, 5.580 and 7.222 Mg ha −1 for “Forest”, “other wooded land” and “other land with tree cover”, respectively (SE% around 18% for all three estimates). Availability of biomass models is very limited for all classes, in particular when it comes to shrubs. Furthermore, it was estimated that the most abundant tree species in Burkina Faso is Vittelaria paradoxa , the “shea butter tree” which is a multi-use tree species of high relevance for rural livelihoods. To our knowledge this study is the first field-based Forest inventory on national level in Burkina Faso where the estimation of errors was possible on statistical grounds, and done. The results of this study revealed major issues that should be taken into account when doing similar studies, including carbon monitoring and accounting: increasing the sample size will lead to smaller standard errors (at a higher costs, of course), but will not solve the crucial points (1) of non-availability of suitable biomass models, in particular for shrub lands and (2) of implementation issues regarding the definition of land cover types.
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A national level Forest Resource Assessment for Burkina Faso – A field based Forest inventory in a semiarid environment combining small sample size with large observation plots
Forest Ecology and Management, 2011Co-Authors: Christoph Fischer, Christoph Kleinn, Lutz Fehrmann, Hans Fuchs, O PanferovAbstract:Abstract Even though considerable parts of the global tropical Forests are located in Africa, reliable data on African Forest Resources is limited. While this is widely recognized for tropical moist Forests, it also holds for tropical dry Forests. To partially fill the gap a Forest inventory was carried out in Burkina Faso, West Africa. In this paper we present a methodological approach and sample based estimates of the tree and Forest Resources including estimates of (1) land cover classes, (2) species composition, and (3) above ground tree carbon stocks. Following the land classification of the Food and Agriculture Organization of the United Nations (FAO), the Forest cover of Burkina Faso was estimated as 42.6% (116,847 km 2 ). For the classes “other wooded land”, “other land” and “other land with tree cover” the estimates were 1.6%, 53.6%, and 9.1%, respectively. We found notable differences to the estimates published by FAO, in particular when considering the classes “Forest” and “other wooded land” separately, but lesser so when the two classes are combined. That points to a major issue in applying these class definitions in semiarid environments. Given the relatively small sample size ( n = 46 field observed plots), relative standard errors (SE%) of area estimates are high (around 9% for the larger area classes). Aboveground tree carbon stocks were estimated to be 6.640, 5.580 and 7.222 Mg ha −1 for “Forest”, “other wooded land” and “other land with tree cover”, respectively (SE% around 18% for all three estimates). Availability of biomass models is very limited for all classes, in particular when it comes to shrubs. Furthermore, it was estimated that the most abundant tree species in Burkina Faso is Vittelaria paradoxa , the “shea butter tree” which is a multi-use tree species of high relevance for rural livelihoods. To our knowledge this study is the first field-based Forest inventory on national level in Burkina Faso where the estimation of errors was possible on statistical grounds, and done. The results of this study revealed major issues that should be taken into account when doing similar studies, including carbon monitoring and accounting: increasing the sample size will lead to smaller standard errors (at a higher costs, of course), but will not solve the crucial points (1) of non-availability of suitable biomass models, in particular for shrub lands and (2) of implementation issues regarding the definition of land cover types.
Doreen S Boyd - One of the best experts on this subject based on the ideXlab platform.
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Satellite remote sensing of Forest Resources: three decades of research development
Progress in Physical Geography, 2020Co-Authors: Doreen S Boyd, F. M. DansonAbstract:Three decades have passed since the launch of the first international satellite sensor programme designed for monitoring Earth’s Resources. Over this period, Forest Resources have come under increasing pressure, thus their management and use should be underpinned by information on their properties at a number of levels. This paper provides a comprehensive review of how satellite remote sensing has been used in Forest Resource Assessment since the launch of the first Earth Resources satellite sensor (ERTS) in 1972. The use of remote sensing in Forest Resource Assessment provides three levels of information; namely (1) the spatial extent of Forest cover, which can be used to assess the spatial dynamics of Forest cover; (2) Forest type and (3) biophysical and biochemical properties of Forests. The Assessment of Forest information over time enables the comprehensive monitoring of Forest Resources. This paper provides a comprehensive review of how satellite remote sensing has been used to date and, building on...
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tropical Forest Resource Assessment by remote sensing
Encyclopedia of Analytical Chemistry, 2006Co-Authors: Doreen S BoydAbstract:The earth's tropical Forests are a global Resource, requiring action for their wise utilization, management and protection at spatial scales from the local through to the global. The acquisition of data pertaining to tropical Forest Resources presents many challenges,1 many of which may be overcome through the use of remote sensing. Reasons for the adoption of remote sensing for the Assessment of tropical Forest Resources are compelling. Remote sensing can be used to observe the dynamics of tropical Forests at almost any level of detail. It allows the frequent measurement and monitoring of the earth's tropical Forests on a continuous basis, from which accurate and informed judgments on their Resources at any given time can be made. Accordingly, there has been progressive evolution of remote sensing approaches for the collection of tropical Forest Resource information. With the imminent launch of new spaceborne sensors which will be able to acquire more information on tropical Forests, remote sensing will continue to be a crucial tool in the Assessment of tropical Forest Resources.
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Encyclopedia of Analytical Chemistry - Tropical Forest Resource Assessment by Remote Sensing
Encyclopedia of Analytical Chemistry, 2006Co-Authors: Doreen S BoydAbstract:The earth's tropical Forests are a global Resource, requiring action for their wise utilization, management and protection at spatial scales from the local through to the global. The acquisition of data pertaining to tropical Forest Resources presents many challenges,1 many of which may be overcome through the use of remote sensing. Reasons for the adoption of remote sensing for the Assessment of tropical Forest Resources are compelling. Remote sensing can be used to observe the dynamics of tropical Forests at almost any level of detail. It allows the frequent measurement and monitoring of the earth's tropical Forests on a continuous basis, from which accurate and informed judgments on their Resources at any given time can be made. Accordingly, there has been progressive evolution of remote sensing approaches for the collection of tropical Forest Resource information. With the imminent launch of new spaceborne sensors which will be able to acquire more information on tropical Forests, remote sensing will continue to be a crucial tool in the Assessment of tropical Forest Resources.
G. Stinson - One of the best experts on this subject based on the ideXlab platform.
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Moving beyond the concept of “primary Forest” as a metric of Forest environment quality
Ecological Applications, 2017Co-Authors: Pierre Y. Bernier, David Paré, G. Stinson, S. R. J. Bridge, Barbara E. Kishchuk, Tony C. Lemprière, Evelyne Thiffault, Brian D. Titus, W. VasbinderAbstract:The United Nations Food and Agriculture Organization (FAO) has been reporting country-level area in primary Forests in its Global Forest Resource Assessment since 2005. The FAO definition of a primary Forest (naturally regenerated Forest of native species where there are no clearly visible indications of human activities and the ecological processes are not significantly disturbed) is generally accepted as authoritative and is being used in policy making. However, problems with this definition undermine our capacity to obtain globally coherent estimates. In addition, the current reporting on primary Forests fails to consider the complementarily of non-primary Forests toward the maintenance of ecosystem services. These issues undermine the appropriate tracking of changes in primary and non-primary Forests, and the Assessment of impacts of such changes on ecosystem services. We present the case for an operational reconsideration of the primary Forest concept and discuss how alternatives or supplements might be developed.
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changes in Forest production biomass and carbon results from the 2015 un fao global Forest Resource Assessment
Forest Ecology and Management, 2015Co-Authors: Michael Kohl, Rodel D Lasco, Miguel Cifuentes, Oerjan Jonsson, Kari T Korhonen, Philip Mundhenk, Jose Navar, G. StinsonAbstract:Abstract Forests are important sources of livelihoods to millions of people and contribute to national economic development of many countries. In addition, they are vital sources and sinks of carbon and contribute to the rate of climate change. The UN Food and Agriculture Organization has been collecting and presenting data on global Forest Resources and Forest cover since 1948. This paper builds on data from FAO’s 2015 Global Forest Resource Assessment (FRA) and presents information on growing stock, biomass, carbon stock, wood removals, and changes of Forest area primarily designated for production and multiple use of the world’s Forests. Between 1990 and 2015, the total growing stock volume has increased in East Asia, Caribbean, Western and Central Asia, North America, Europe (including the Russian Federation), and Oceania with the highest relative increase in East Asia and the Caribbean. In all other subregions the total growing stock volume decreased. North and Central America, Europe and Asia report Forest C stock increases while South America and Africa report strong decreases and Oceania reports stable Forest C stocks. The annual rate of decrease of Forest C stock weakened between 1990 and 2015. The total volume of annual wood removals including woodfuel removals increased between 1990 and 2011, but shows a remarkable decline during the 2008–2009 economic crisis. Forest areas designated for production purposes differ considerably between subregions. The percentage of production area out of total Forest area ranges between 16 percent in South America and 53 percent in Europe. Globally about one quarter of the Forest area is designated to multiple use Forestry. The balance between biomass growth and removals shows considerable sub-regional differences and related implications for the sustainable use of Forests.
Alastair Fraser - One of the best experts on this subject based on the ideXlab platform.
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Institutions and Policy Instruments Required to Ensure Forests Are Managed Sustainably
Sustainable Development Goals Series, 2019Co-Authors: Alastair FraserAbstract:In this chapter, the variation in the structure of Forestry institutions in different countries is discussed and a unified organisation that covers all aspects of Forestry (production, protection, conservation, Forest products industry and trade, recreation and tourism) is strongly advocated. Private and community managed Forests benefit from the support of Forestry Associations. The various regulatory, financial, technical and human Resource instruments available to support sustainable Forest management are reviewed. An analysis of the employment in Forestry data reported in the FAO Global Forest Resource Assessment 2015 shows that countries that lost Forest during the period employed about half the number of people compared with the countries that gained Forest. The difference suggests that as many as 3.5 million additional staff are required globally to achieve sustainable Forest management.
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The Current Status of Sustainably Managed Forests
Sustainable Development Goals Series, 2019Co-Authors: Alastair FraserAbstract:In this chapter, the current status of sustainably managed Forests is discussed and the FAO Global Forest Resource Assessment 2015 is analysed in some detail. Only 12.5% of the total Forest area is currently certified, much of it temperate plantation Forests. While the net loss of Forest from 2010 to 2015 was 16 million ha, it was made up of 38.7 million ha loss in 77 countries and 22.7 million ha increase in 71 countries. The analysis shows that Forest cover and change in Forest cover is strongly correlated with population density and the change in population density in the heavily Forested regions of the temperate and tropical parts of the world. The drivers of deForestation and Forest degradation are discussed. While expansion of agriculture and economic development are direct drivers, there are major indirect drivers in the form of insecure land property rights, excess of wood processing capacity and demand for Forest products over the available sustainable supple, market failure with regard to Forest products and failure to treat timber as a renewable Resource. However, there is one example of a sustainably managed Forest in the tropics.
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Sustainability of the Supply of Timber and Non-timber Forest Products
Sustainable Development Goals Series, 2019Co-Authors: Alastair FraserAbstract:Although Forest sustainability is as much about biodiversity and the environment as it is about Forest products, the latter are both the largest source of Forest-based revenue and employment in many countries and a major driver of deForestation and Forest degradation. Analysis of the FAO Global Forest Resource Assessment data suggest that illegal and unrecorded production of industrial roundwood accounts for an additional 30% of the recorded production. Most of the unrecorded production supplies undemanding domestic markets, while certified recorded production is largely exported. 85 countries appear to be seriously overcutting their Forests and overall Forests globally appear to be at a tipping point with the annual harvest now only just balanced by annual growth. The existence of so much illegally harvested timber contributes to the low market value of logs. Certification and Voluntary Partnership Agreements need to apply to all Forest in a country and not just those units that are engaged in exports, because of leakage of unsustainable harvesting from certified Forests to other Forest areas. The importance and value of non-timber Forest products such as fuelwood, bamboo, rattan and others is discussed.