A5070691033- Conservation, Biodiversity, and Resource Management
- Rangeland Management and Livestock Ecology
- Land Use and Ecosystem Services
- Forest Management and Policy
- Sustainable Development and Environmental Policy
- Agriculture and Rural Development Research
- Climate Change Policy and Economics
- Remote Sensing in Agriculture
- Forest ecology and management
- Economic and Environmental Valuation
- Remote Sensing and LiDAR Applications
- Ecology and Vegetation Dynamics Studies
- African Botany and Ecology Studies
- Species Distribution and Climate Change
- Sustainability and Climate Change Governance
- Global trade, sustainability, and social impact
- Southeast Asian Sociopolitical Studies
- Ecosystem dynamics and resilience
- Tree Root and Stability Studies
- Urban and Rural Development Challenges
- Land Rights and Reforms
- Aeolian processes and effects
- Soil erosion and sediment transport
- Plant Ecology and Soil Science
- Plant and animal studies
University of Leeds
2011-2023
Borders General Hospital
2019
University of York
2004
Goodwin College
1993
University of Illinois Urbana-Champaign
1993
Illinois Archaeological Survey
1993
US Forest Service
1993
University of Stirling
1991
University of Salford
1990
Resources For The Future
1988
The area of land covered by forest and trees is an important indicator environmental condition. This study presents analyses results from the Global Forest Resources Assessment 2015 (FRA 2015) Food Agriculture Organization United Nations. FRA was based on responses to surveys individual countries using a common reporting framework, agreed definitions standards. Results indicated that total declined 3%, 4128 M ha in 1990 3999 2015. annual rate net loss halved 7.3 y−1 1990s 3.3 between 2010...
Mapping the world's dry forests The extent of forest area in dryland habitats, which occupy more than 40% Earth's land surface, is uncertain compared with that other biomes. Bastin et al. provide a global estimate drylands, calculated from high-resolution satellite images covering 200,000 plots. Forests drylands are much extensive previously reported and cover total similar to tropical rainforests or boreal forests. This increases estimates by at least 9%, finding will be important...
The long-term trend in tropical forest area receives less scrutiny than the deforestation rate. We show that constructing a reliable is difficult and evidence for decline unclear, within limits of errors involved making global estimates. A time series all area, using data from Forest Resources Assessments (FRAs) United Nations Food Agriculture Organization, dominated by three successively corrected declining trends. Inconsistencies between these trends raise questions about their...
Abstract The Global Drylands Observing System proposed in this issue should reduce the huge uncertainty about extent of desertification and rate at which it is changing, provide valuable information to scientists, planners policy‐makers. However, needs careful design if outputs are be scientifically credible salient people living dry areas. Its would benefit from a robust, integrated scientific framework like Dryland Development Paradigm guide/inform development an global monitoring...
Abstract This paper suggests how the United Nations Convention to Combat Desertification (UNCCD) community can progressively make use of a flexible framework analytical approaches that have been recently developed by scientific research. allows standardized but indicator sets adapted specific objectives or desertification issues relevant for implementing Convention. Science has made progress in understanding major and proximate causes dryland degradation such be accordingly selected from...
ABSTRACT Aim To model long‐term trends in plant species distributions response to predicted changes global climate. Location Amazonia. Methods The impacts of expected climate change on the potential and realized a representative sample 69 individual Angiosperm Amazonia were simulated from 1990 2095. trend followed HADCM2GSa1 scenario, which assumes an annual 1% increase atmospheric CO 2 content with effects mitigated by sulphate forcing. Potential one‐degree grid cells modelled using...
SUMMARY There are an estimated 2,077 million ha of degraded lands in the tropics, which 758 have a theoretical potential for forest replenishment if substantial area low productivity rangelands is disregarded. The total includes 418 dry or montane areas requiring afforestation reforestation; 137 tropical rain forests need protected regeneration silvicultural manipulation; and 203 fallows humid tropics could be reforested. Based upon previous forecasts future demand fuelwood industrial wood...
Abstract A preliminary framework for evaluating the effectiveness of international environmental agreements (IEAs) is described, and applied to UN Plan Action Combat Desertification (PACD) Convention (CCD), both which have proven ineffective. There good correspondence between framework's nine criteria official explanations reasons poor implementation. Most were identified in previous studies but opinions are divided on one them—access scientific knowledge. Its inclusion does, however,...
Earth observation is diversifying, and now includes new types of systems, such as citizen observatories, unmanned aerial vehicles wireless sensor networks. However, the Copernicus Programme vision a seamless chain from satellite data to usable information in hands decision makers still largely unrealized, remote sensing science lacks conceptual framework explain why. This paper reviews literatures on science, observatories conceptualization systems. It then proposes Conceptual Framework for...
Abstract Quantitative data on dryland changes and their effects the people living there are required to support policymaking environmental management at all scales. Data regularly acquired by international, national or local entities, but presently exhibit specific gaps. Promoting sustainable development in drylands necessitates a much stronger integration, coordination synthesis of available information. Space‐based remote sensing systems continue play an important role do not fulfill...
Knowledge of tropical forest change remains uncertain, affecting our ability to produce accurate estimates globally aggregated parameters support clear global statements about ‘the forests’. This paper reviews current methods for constructing knowledge changes in area, carbon density, biodiversity and ecosystem services. It finds a deficiency formal institutions measurement knowledge. In their absence, informal have proliferated, increasing the spread estimates. is exacerbated by dependence...
for the 1980s, are evaluated using an original set of criteria and uncertainty is shown to result from lack attention remote sensing measurements overconfidence in use expert judgement. Estimates total area tropical moist forest also unreliable, despite increased data their derivation. A continuous satellite-based global monitoring system needed obtain better estimates institutional requirements this discussed.