131 research outputs found
Oil and Gas Projects in the Western Amazon: Threats to Wilderness, Biodiversity, and Indigenous Peoples
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.The western Amazon is the most biologically rich part of the Amazon basin and is home to a great diversity
of indigenous ethnic groups, including some of the world’s last uncontacted peoples living in voluntary isolation. Unlike
the eastern Brazilian Amazon, it is still a largely intact ecosystem. Underlying this landscape are large reserves of oil and
gas, many yet untapped. The growing global demand is leading to unprecedented exploration and development in the
region. Without improved policies, the increasing scope and magnitude of planned extraction means
that environmental and social impacts are likely to intensify. We review the most pressing oil- and gas-related conservation
policy issues confronting the region. These include the need for regional Strategic Environmental Impact Assessments and
the adoption of roadless extraction techniques. We also consider the conflicts where the blocks overlap indigenous peoples’
territories
Population, Land Use and Deforestation in the Pan Amazon Basin: a Comparison of Brazil, Bolivia, Colombia, Ecuador, PerĂş and Venezuela
This paper discusses the linkages between population change, land use, and deforestation in the Amazon regions of Brazil, Bolivia, Colombia, Ecuador, Perú, and Venezuela. We begin with a brief discussion of theories of population–environment linkages, and then focus on the case of deforestation in the PanAmazon. The core of the paper reviews available data on deforestation, population growth, migration and land use in order to see how well land cover change reflects demographic and agricultural change. The data indicate that population dynamics and net migration exhibit to deforestation in some states of the basin but not others. We then discuss other explanatory factors for deforestation, and find a close correspondence between land use and deforestation, which suggests that land use is loosely tied to demographic dynamics and mediates the influence of population on deforestation. We also consider national political economic contexts of Amazon change in the six countries, and find contrasting contexts, which also helps to explain the limited demographic-deforestation correspondence. The paper closes by noting general conclusions based on the data, topics in need of further research and recent policy proposals.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42720/1/10668_2003_Article_6977.pd
Varietal differences in sulphur uptake and utilization in relation to glucosinolate accumulation in oilseed rape
Changes in the individual glucosinolate profile of double low oilseed rape as influenced by spring nitrogen application
Nitrogen to sulphur ratio in rapeseed and in rapeseed protein and its use in diagnosing sulphur deficiency
Effects of site, season and sulphur and nitrogen fertiliser on yield and seed glucosinolates of winter oilseed rape. Home-Grown Cereals Authority Project Report OS8
The physiological basis of glucosinolate accumulation in the developing seed of oilseed rape (B. napus)
Variation between two near isogenic barley (Hordeum vulgare) cultivars in expression of the B subunit of the vacuolar ATPase in response to salinity.
A gene encoding the barley vacuolar ATPase subunit B (BSVAP) was differentially expressed between two near isogenic barley cultivars, Golden Promise and Maythorpe. This gene (BSVAP) was isolated by the mRNA differential display technique (DDRT-PCR). BSVAP was salt inducible under long-term salinity stress in the salt sensitive cultivar Maythorpe but less so in the relatively salt tolerant Golden Promise and was more highly expressed under control conditions in Maythorpe. The physiological consequences of altered vacuolar ATPase expression are discussed in relation to the salt sensitivity of Maythorpe
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