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Displaying 1571 - 1575 of 1605Modeling the effects of introducing timber sales into volume-based tenure agreements
The problem of allocating cutting rights among competing licensees in Canada often entails assigning large discrete units of land to these licensees, typically for periods of fifteen to twenty-five years. The units of forest land are often large because it is economically infeasible for firms to maintain roads and operations widely dispersed across a forest. The assignment of these areas clearly frustrates the economic objective of sending the “right log to the right mill”.
Is land abandonment having an impact on biodiversity? A meta-analytical approach to bird distribution changes in the north-western Mediterranean
Teasing out how species respond to human-induced environmental changes has become a priority for addressing the challenges posed by the need to conserve biodiversity. Although land abandonment is widespread, the threat it can represent to biodiversity remains poorly understood. To address this issue, we used data from eight long-term studies in a region with widespread land abandonment that has been identified as a biodiversity hotspot, the north-west Mediterranean Basin.
Regional carbon stocks and dynamics in native woody shrub communities of Senegal's Peanut Basin
Estimating regional carbon (C) stocks and understanding their dynamics is crucial, both from the perspective of sustainable landscape management and global change feedback. This study combines remote sensing techniques and a coupled GIS-CENTURY model to estimate regional biomass C stocks and SOC dynamics for Guiera senegalensis shrub communities in Senegal's Peanut Basin. A statistical model relating field-measured shrub aboveground biomass C at training plots to satellite image-derived shrub abundances was developed and used to estimate regional biomass C across a major part of the Basin.
Using a groundwater quality negotiation support system to change land-use management near a drinking-water abstraction in the Netherlands
A negotiation support system (NSS) was developed to solve groundwater conflicts that arose during land-use management. It was set up in cooperation with the stakeholders involved to provide information on the impact of land use, e.g., agriculture, nature (forested areas), recreation, and urban areas, on the quality of both infiltrating and abstracted groundwater. This NSS combined simulation programs that calculate (1) the concentrations of nitrate in shallow groundwater for each land-use area and (2) the transport of nitrate in the groundwater-saturated zone.
Mutual monitoring in a tradable water rights system: A case study of Zhangye City in Northwest China
Tradable water right systems are becoming important ways to achieve distributive efficiency in water resources. In 2002, China's Ministry of Water Resources initiated a pilot project in Zhangye City in Northwest China. The project was designed to establish a new water use rights system with tradable water quotas with the hope of reallocating water resources more efficiently through market-based instruments. However, the tradable water right system is not well enforced.