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11.
海洋渔业是我国海洋强国的重要组成部分,但近年来全球气候变暖、海域环境污染等严重的资源问题和生态问题日益对我国海洋渔业生态文明建设提出新的挑战。本文选取 2006-2016年我国沿海11个省市海洋渔业相关面板数据,首先将海洋渔业二氧化碳排放量作为非期望产出纳入超效率 SBM-DEA窗口分析法中,测算出海洋渔业生态效率值并评价其有效性。然后进一步探究海洋渔业生态效率的空间效应并运用Tobit随机效应面板模型,分析了海洋渔业生态效率的影响因素。结果显示:(1)我国沿海 11个省市海洋渔业生态效率有效水平较低且存在区域差异。(2)我国 沿海 11个省市海洋渔业生态效率水平逐步由随机相异发展空间格局向聚集态势变动。(3)我国沿海 11个省市的海洋渔业经济发展水平对海洋渔业生态效率的影响呈现出显著的负相关关系;渔业产业结构、海洋环境政策与海洋渔业生态效率的影响呈现出 正相关关系。最后基于实证研究,提出建设海洋生态渔业,提升海洋渔业生态效率有效水平的建议。 相似文献
12.
为了解黑龙江省生态可持续发展问题,对黑龙江省生态足迹进行分析,并寻求动态预测结果。运用生态足迹模型对黑龙江省2000~2015年的人均生态足迹和生态承载力进行测算,在此基础上选用ARIMA模型,并结合使用Eviews软件对未来10年人均生态足迹和生态承载力进行预测。研究结果表明2000~2015年间黑龙江省人均生态足迹一直不断增加,人均生态承载力呈现波动缓慢上升的趋势,生态系统处于不安全状态;2016~2025年黑龙江省人均生态足迹仍然持续增大,虽然人均生态承载力也缓慢上升,但人均生态赤字仍然越来越大,黑龙江省生态安全面临巨大挑战。 相似文献
13.
China’s Sloping Land Conversion Program (SLCP) is the world’s largest payment for ecosystem services program for improving ecological conditions and farmers’ livelihood. Communicating the SLCP outcomes across diverse stakeholder groups in ecological, socio-economic, political and institutional contexts can facilitate the effective implementation of the new round of the SLCP. Experts from various fields involved in the SLCP have developed good connections with governments, agencies, and farmers; therefore they can play an invaluable role in informing urgent policy changes. This study is based upon 24 interviews with the SLCP experts with the aims of assessing their perceptions of ecological, economic, political and social impacts of the SLCP on the Loess Plateau of China, and then gathering their policy recommendations to ensure that the new round of the SLCP would be implemented efficiently. Content analysis based on the grounded theory is used in present study. Judging from expert-based consensual statements from this study’s interviews, the main concerns about the first round of the SLCP on the Loess Plateau are that the dramatic increase in the farmer’s income and livelihood is mainly from off-farm sources rather than the SLCP subsidy, that equitable government compensation is dependent on the outcome of the SLCP, that the aggressive SLCP causes soil drought which have negative effects on ecological restoration, and that the stakeholders’ interaction could be improved. Based on the analyses of the experts’ interviews, the recommendations are summarised as follows: strengthening the farmers’ environmental awareness and vocational skills, establishing multi-source financial supports and flexible compensation mechanisms, establishing participatory planning that requires stakeholder involvement especially farmers and insisting that scientific studies on the ecological restoration of the Loess Plateau must be shared with local governments and farmers. 相似文献
14.
杨中柱 《北京财贸职业学院学报》2017,33(2)
立足于十三五时期,以现代城市与生态文明问题为研究目的.从生态文明是现代城市又好又快发展的必由之路的三个方面理清思路,采取分析问题解决问题的方法,阐明我国现代城市与生态文明面临的新形势新挑战,对现代城市与生态文明作一些探究,为 "十三五"期间及今后一段时期我国现代城市的生态文明建设提供参考. 相似文献
15.
区域中心城市创新生态圈以生物学为隐喻,注重发挥创新主体的能动作用,能够放大区域中心城市发展优势。在回顾创新生态圈理论渊源的基础上,界定区域中心城市创新生态圈内涵,明确创新生态圈要素构成;以企业聚集发展为逻辑起点,探讨区域中心城市创新生态圈生态特征;基于生态学、创新理论等跨学科知识,构建区域中心城市创新生态圈演进模型,探究其运行机制。研究认为,区域中心城市创新生态圈具有开放式协同、动态自调节、多样性共生、自组织演化等生态特征,其运行机制由协同共生机制、风险识别与防控机制、利益分配机制和环境匹配机制共同组成。 相似文献
16.
Developing countries have achieved remarkable overall economic diversification and growth during the last few decades, but farmland has remained a prime pillar of the livelihood support system of resource poor people in the rural areas of these countries. For these people, land is still the most important resource as it has multiple utilities such as a symbol of social standing, collateral value and a reserve capital asset for emergencies. Agricultural land assumes different values for different owners. This study establishes the criticality of age, education level, size of family workforce, dependency on agricultural income, productivity of land and location of farmland in influencing perception of value of farmland. Ignoring these factors creates a gap in the value of farmland as perceived by the farmland owner and the government. Knowledge of these factors may help in making appropriate adjustments in government declared prices of farmland for determining appropriate land compensation rate for a specific location. 相似文献
17.
The Requisition–Compensation Balance of Farmland (RCBF) is a strict policy in China aimed at controlling farmland conversion and replenishing farmland loss caused by urban expansion through a set of top-down quotas. These conflict with local interests, since land conversion from agriculture to construction is a key tool by which local governments attract investment and raise fiscal revenue. How should local authorities respond to this centralized policy? This paper presents a framework “quantity–quality–productivity–environment” to investigate local governments’ coping strategy and the holistic performance of the RCBF. The empirical study indicated that local jurisdictions placed economic and financial growth first and continued expropriating farmland on a large-scale, including land of high quality, for development. However, impelled by compulsory quotas and supervision from governments at higher levels, local authorities would partly replenish the quantity loss through farmland exploitation, regardless of the quality of the new cropland and the possible environmental impact. Consequently, fast requisition and unqualified compensation undermined the capacity of regional agricultural output. We suggest that the RCBF is not capable of guaranteeing food security, whilst farmland supplementation threatens the local environment. 相似文献
18.
Many have suggested that a new form of sustainable agricultural productivism is needed in response to the challenges to food security posed by climate change and population growth. This paper employs elements of ecological modernisation theory and focusses on sustainability challenges and solutions, as well as the knowledge networks and production rationale to assess whether the intensive horticultural industry located in the Spanish province of Almería represents sustainable productivism. The Almerían horticultural industry, lauded as an example of neo-endogenous growth, manifests a range of sustainable technologies addressing environmental impacts. Yet, we argue that Almerían horticulture represents ‘weak ecological modernisation’ and its main sustainability challenges are posed by water scarcity, a demand led production rationale and the precarious situation of family farms that at present provide a degree of economic embeddedness in this highly industrialised production model. A competitive imperative yields marketing organisations huge sway in production decision-making, and while a cost-price squeeze has driven efficiency in the use of farm inputs and product innovation, it has paradoxically made further advances in sustainable water management very difficult to achieve. Transforming the Almerían horticultural industry into a truly sustainable model of productivism would require the concerted efforts of individual farmers and marketing organisations as well as regional and local water governance institutions and land use planning. A significant obstacle to this remains the dominant normative perception that justifies groundwater abstraction on the grounds of its high economic returns and the perceived inability of small farmers to invest in desalinated water or further technological solutions. 相似文献
19.
Estimation of ecosystem service values is a hot area of research in ecological conservation and economics. However, the costs of these outputs are largely unknown. In this paper, we estimated the opportunity cost of water allocated to afforestation projects through mathematical modeling based on statistical data for all of China to provide support for restoration planning based on a fuller consideration of the true costs. To guide future ecological conservation and environmental policy development, we illustrate a neglected concept (ecosystem service costs) and use this concept to compare the ecological services provided by ecological restoration based on afforestation with those of restoration based on the conservation of natural vegetation using data obtained since 1949 in China. The results showed that afforestation and natural vegetation create annual costs related to use of the available water resources equal to 4800 and 3700 RMB ha−1, respectively, representing a water opportunity cost of 1100 RMB ha−1 for afforestation. This illustrates the rule that “there is no free lunch” for any service, including ecosystem services. Therefore, to support the development of more effective and sustainable environmental restoration policy, it will be necessary to evaluate the associated opportunity costs. 相似文献
20.
Overbooking is widely applied in the service industry to hedge against undesirable situations, such as cancellations and no-shows. However, during the implementation of overbooking, service providers may turn down some customers when the number of arrivals exceeds their capacity on the target date. Therefore, this paper examines overbooking from the customers' perspective to offer them a clear perception on the possibility for their reservations to be denied by the service provider. By establishing a Stackelberg model between a service provider and an online travel agency, we explore how optimal overbooking strategy is developed by the service provider. Afterward, by analyzing the obtained optimal overbooking pad, we calculate the probabilities of denied service under different levels of monetary compensation that is paid to denied customers. A higher monetary compensation guarantees a higher chance of successful service. This paper also provides customers with some reference when booking services. 相似文献