نتایج جستجو برای: deforestation
تعداد نتایج: 5221 فیلتر نتایج به سال:
Models of settlement Various lines of evidence indicate that the ‘homeland’, or Hawaiiki, of the early Polynesian settlers of Aotearoa was eastern Polynesia (e.g. see Sutton, 1994; Howe, 2003). Establishing the timing of settlement has been problematic, however. The most recent and reliable evidence, both from archaeological and natural sites, points consistently to initial settlement between c...
This article discusses the cycle of conversion, consumption, and corruption that undermines the environment and civil society in Cambodia and Burma (Myanmar). In these countries, forests are declining in patterns similar to other Southeast Asian deforestation. Illegal logging, prostitution, and heroin trafficking constitute the bulk of Cambodia's shadow economy. Revenues are used to provide ...
Agricultural expansion has resulted in both land use and land cover change (LULCC) across the tropics. However, the spatial and temporal patterns of such change and their resulting impacts are poorly understood, particularly for the presatellite era. Here, we quantify the LULCC history across the 33.9 million ha watershed of Tanzania's Eastern Arc Mountains, using geo-referenced and digitized h...
Estimates of extinction risk for Amazonian plant and animal species are rare and not often incorporated into land-use policy and conservation planning. We overlay spatial distribution models with historical and projected deforestation to show that at least 36% and up to 57% of all Amazonian tree species are likely to qualify as globally threatened under International Union for Conservation of N...
Functional programming languages are an ideal medium for program optimisations based on source-to-source transformation techniques. Referential transparency affords opportunities for a wide range of correctness-preserving transformations leading to potent optimisation strategies. This thesis builds on deforestation, a program transformation technique due to Wadler that removes intermediate data...
The dynamics of deforestation in the Brazilian Amazon are complex. A growing debate considers the extent to which deforestation is a result of the expansion of the Brazilian soy industry. Most recent analyses suggest that deforestation is driven by the expansion of cattle ranching, rather than soy. Soy seems to be replacing previously deforested land and/or land previously under pasture. In thi...
Besides, Indonesia has significant gas and coal resources, indeed, has a lot of oil reserves, Indonesia has also the second largest tropical forest after Brazil and has about 144 million ha or around 10% of what remains of this resources (Trisasongko, 2002). Otherwise, Indonesian deforestation continues unabated, making the country a potentially big supplier of projects under the CDM (clean dev...
BACKGROUND To implement the REDD+ mechanism (Reducing Emissions for Deforestation and Forest Degradation, countries need to prioritize areas to combat future deforestation CO2 emissions, identify the drivers of deforestation around which to develop mitigation actions, and quantify and value carbon for financial mechanisms. Each comes with its own methodological challenges, and existing approach...
We estimate the effects of neighbors’ deforestation actions on individuals’ deforestation decisions in Costa Rica. To address simultaneity and the presence of spatially correlated unobservable factors, we instrument for neighboring deforestation using topographic and biological characteristics of neighboring parcels. We find evidence that neighboring deforestation significantly raises the proba...
Tropical forests are diminishing in extent due primarily to the rapid expansion of agriculture, but the future magnitude and geographical distribution of future tropical deforestation is uncertain. Here, we introduce a dynamic and spatially-explicit model of deforestation that predicts the potential magnitude and spatial pattern of Amazon deforestation. Our model differs from previous models in...
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