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Smallholder farmers in sub-Saharan Africa are confronted with climatic and non-climatic stressors. Research attention has focused on climatic stressors, such as rainfall variability, with few empirical studies exploring non-climatic stressors and how these interact with climatic stressors at multiple scales to affect food security and livelihoods. This focus on climatic factors restricts understanding of the combinations of stressors that exacerbate the vulnerability of farming households and hampers the development of holistic climate change adaptation policies. This study addresses this particular research gap by adopting a multi-scale approach to understand how climatic and non-climatic stressors vary, and interact, across three spatial scales (household, community and district levels) to influence livelihood vulnerability of smallholder farming households in the Savannah zone of northern Ghana. This study across three case study villages utilises a series of participatory tools including semi-structured interviews, key informant interviews and focus group discussions. The incidence, importance, severity and overall risk indices for stressors are calculated at the household, community, and district levels. Results show that climatic and non-climatic stressors were perceived differently; yet, there were a number of common stressors including lack of money, high cost of farm inputs, erratic rainfall, cattle destruction of crops, limited access to markets and lack of agricultural equipment that crossed all scales. Results indicate that the gender of respondents influenced the perception and severity assessment of stressors on rural livelihoods at the community level. Findings suggest a mismatch between local and district level priorities that have implications for policy and development of agricultural and related livelihoods in rural communities. Ghana’s climate change adaptation policies need to take a more holistic approach that integrates both climatic and non-climatic factors to ensure policy coherence between national climate adaptation plans and District development plans.  相似文献   
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Since the Rio conference, many countries and organisations, including the environmental movement, bilateral and multilateral institutions have endeavoured to carry out activities related to the implementation of Agenda 21. These have mostly been done with or without other outcomes of the conference. Several environmental management and sustainable development agenda have been pursued to halt the continually degrading environment. Other programmes have concentrated on outburst of economic development at the expense of the environment and the worsening poverty especially in the South. This paper therefore seeks to examine a paradigmatic shift in environmentalism, emphasising the link between agenda 21 and sustainable livelihoods. It seems though the history of the environmental movement has been forgotten after the Rio conference by the whole world. This might probably be due to complacency with the results of the UNCED conference. However, it is now obvious that clear objectives to implement the results of UNCED are almost lacking with little or no proper supervision, and further threatening the existence of mankind. The environmental movement and associated milestones have had significant impacts on the current status of the global commons. Regionally in most of southern Africa, livelihood issues are in the forefront of efforts to sustain environmental resources, and minimising proximate causes of global environmental change.  相似文献   
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The importance of wild edible herbaceous species to resource poor households in most rural economies within savannas has been little studied. This is because most of the herbs grow in impoverished species communities and lands, often referred to as 'marginal lands'. The aim of this paper is to conceptualize how the economics of wild edible herbs to households can be used to add value to total livelihoods and conservation within traditional communal areas of South Africa. Analysis of the economics of the consumption of wild edible herbs in Thorndale (Bushbuckridge district) of the Limpopo province is presented. The majority of households consumed wild edible herbs, averaging 15.4 kg dried weight per household per year and valued at $167 per household. The herbs were mostly harvested from uncultivated areas of farms, and rangelands. There was little correlation between household characteristics and the dependence on wild herbs for food. The local people noted a decline in the availability of the species, although not much is known about attempts to cultivate them. The only reasons attributed to the decline were nutrient poor soils and insufficient rains. With this background, developing a local strategy to sustain the species through cultivation by households was found to be feasible. A multiple-use system for the herbs, their improvement and value addition towards commercialization and increased household usage may result in wider acceptance and subsequent cultivation. Species diversity will be enhanced whilst conserving the land on which they grow. This multiple use system may include species roles in soil and water conservation.  相似文献   
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SUMMARY

This paper examines the contribution of secondary resources harvested from a savanna ecosystem to household income in Thorndale village, South Africa. The valuation of these resources provides a key tool for adopting sustainable development practices. The study shows the relevance of the dependence of rural people on secondary resources and implications for social and economic equity. Fuelwood, edible herbs and thatch grass contributed 80.6% ($492.53) of the total gross direct-use value ($559.46) of all the resources per household per annum. The net direct-use value of eight directly harvested resources was $455.11 after accounting for the opportunity cost of labour. The value of secondary resources traded amounted to $126.62 per household, equivalent to 22.6% of values from direct consumption, suggesting a high degree of dependence of villagers on natural resources harvested for household consumption. There were high relative direct-use values for fuelwood (44%) and edible herbs (25.9%) reflecting the high energy requirement, and substitute for cultivated vegetables, respectively. It was generally perceived that resources were in short supply probably due to the level of dependence, and as a coping strategy.  相似文献   
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The role of non-timber forest products in sustaining rural economies of the southern African region has been underestimated because of inadequate policy recognition. As a result, factors affecting the sustainability of these important resources are being undermined. The aim of the paper is to examine trade in two selected NTFPs and implications for sustaining the resource base in Zimbabwe and South Africa. In eastern Zimbabwe, baobab (Adansonia digitata) bark is harvested for craft purposes, but in danger of destruction in the short term as a result of harvesting and trade arrangements. Unless appropriate harvesting and marketing mechanisms including harvesting cycles and adaptive management are adopted, the baobabs and livelihoods of humans will be threatened in the next decade. For wood products from communal woodlands in the South African study, uncontrolled trade poses danger to sustaining the natural woodlands. In both case studies, the role of non-resident NTFP dealers is a source of inevitable threat in promoting sustainable harvesting and trade. Market forces of demand and supply factors are identified as opportunities or threats and presented in a conceptualised framework. Additionally, the NTFP sector management will need to include opportunistic improvement of small-scale agropastoralism.  相似文献   
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