首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   157篇
  免费   4篇
财政金融   1篇
工业经济   1篇
计划管理   15篇
经济学   64篇
综合类   2篇
运输经济   1篇
旅游经济   7篇
农业经济   62篇
经济概况   8篇
  2024年   1篇
  2023年   3篇
  2022年   9篇
  2021年   6篇
  2020年   8篇
  2019年   4篇
  2018年   4篇
  2017年   8篇
  2016年   2篇
  2015年   2篇
  2014年   5篇
  2013年   14篇
  2012年   7篇
  2011年   7篇
  2010年   4篇
  2009年   9篇
  2008年   10篇
  2007年   13篇
  2006年   4篇
  2005年   10篇
  2004年   4篇
  2003年   4篇
  2002年   6篇
  2001年   6篇
  2000年   3篇
  1999年   1篇
  1998年   4篇
  1997年   1篇
  1996年   1篇
  1994年   1篇
排序方式: 共有161条查询结果,搜索用时 15 毫秒
1.
The mitigation hierarchy (MH) is a prominent tool to help businesses achieve no net loss or net gain outcomes for biodiversity. Technological innovations offer benefits for business biodiversity management, yet the range and continued evolution of technologies creates a complex landscape that can be difficult to navigate. Using literature review, online surveys, and semi-structured interviews, we assess technologies that can improve application of the MH. We identify six categories (mobile survey, fixed survey, remote sensing, blockchain, data analysis, and enabling technologies) with high feasibility and/or relevance to (i) aid direct implementation of mitigation measures and (ii) enhance biodiversity surveys and monitoring, which feed into the design of interventions including avoidance and minimization measures. At the interface between development and biodiversity impacts, opportunities lie in businesses investing in technologies, capitalizing on synergies between technology groups, collaborating with conservation organizations to enhance institutional capacity, and developing practical solutions suited for widespread use.  相似文献   
2.
中国蝶类生物多样性生存现状及其新的保护模式探索   总被引:1,自引:0,他引:1  
中国地跨古北区和东洋区,蝴蝶生物多样性非常丰富。蝴蝶具有巨大的美学、经济和生态价值。但是由于生态环境的破坏和市场利益的驱动,使我国蝴蝶生物多样性资源遭受了严重破坏。指出了我国蝴蝶生物多样性资源所面临的主要威胁以及所采取的保护措施,提出了蝴蝶生物多样性资源保护和可持续利用双赢的新思路,以期达到蝴蝶资源保护和可持续利用的良性互动。  相似文献   
3.
生物多样性管理与农民土地权益保护   总被引:1,自引:0,他引:1  
生物多样性管理经历了从个别物种保护、物种和栖息地保护到自然保护区保护的发展阶段。建立自然保护区已成为中国生物多样性管理的重要手段,但自然保护区的建立对当地居民的生计构成了潜在威胁。应当通过增加自然保护区的财政投入,完善自然保护区集体土地征用制度,实行自然保护区社区共管等措施,实现自然保护区管理与农民土地权益保护之间的和谐发展。  相似文献   
4.
The tourism industry can negatively affect wildlife, plants and natural ecosystems through habitat destruction, pollution, over-exploitation of natural resources and visitor impacts to sensitive ecosystems. One approach to mitigate such threats is the application of voluntary sustainability standards, supported by training of tourism enterprises and verified by external audits. The Rainforest Alliance standard defines 78 criteria (requirements) for sustainable environmental, social and business practices, and has been adopted by over 600 tourism enterprises – including hotels, lodges and tour boats – in 12 countries. We examined the performance of 106 hotels in six Latin American countries against 29 of the sustainable tourism criteria most directly related to biodiversity conservation. Independent audits were used to assess hotel performance at baseline followed by a repeat assessment after training, about two years later. Mean conformance with the 29 biodiversity criteria increased significantly during this interval, from 44% to 58%. Improvements were greatest for businesses in the lowest third of performance at baseline (laggards) and smallest for hotels in the highest third (leaders). The results indicate that a voluntary sustainability standard and training program can serve both to recognize existing good actors and to drive incremental improvement in enterprises that were previously less sustainable.  相似文献   
5.
中国—东盟自由贸易区内生物遗传资源丰富,但随着区域内经济的发展,生物多样性遭到了威胁,为此双方酝酿建设中国—东盟生物多样性廊道。当前廊道内遗传资源面临盗掘滥用、外来生物入侵、孤立保护、利益归属不清晰等问题。必须把廊道内遗传资源保护同知识产权制度结合起来,加强跨国遗传资源的知识产权保护合作,完善廊道内各国遗传资源的立法和管理体制,并加快廊道内遗传资源的普查、登记、注册等基础工作。  相似文献   
6.
The year 2011 is the United Nations International Year of Forests. In addition to performing extremely significant environmental, economic, and social services, forests are also important tourism attractions in their own right and locations for recreation and tourism activities. The limited statistical data available suggest that there are billions of tourism and recreational visits to forests each year. This paper provides a global overview of biodiversity conservation, protected areas, recreational access, and management objectives in forests before outlining some of the main themes in the relationship between tourism and forests. It concludes that there is a need for a research effort on tourism and forests in order to provide greater recognition for the economic and environmental contributions of tourism in forest areas as well as the overall value of forests for health and wellbeing.  相似文献   
7.
Protected areas are key to the conservation of global biodiversity and ecosystem services; however, their success is contingent upon adequate funding. One possibility to increase funding for park management is to “sell” a wider suite of ecosystem services “produced” by protected areas, such as carbon sequestration. We conducted 420 tourist surveys to analyze willingness to pay (WTP) for ecosystem service benefits via a conservation fee in the Tambopata National Reserve in Peru. We also interviewed eight tour operators about their perceptions of the proposed fee. The average stated WTP was 15 USD. Sixty-six percent of tourists stated they would pay 10 USD or more, which, if actually paid, would have resulted in 318,000 USD for park management in 2015. Most respondents stated they would pay an additional fee if it supported biodiversity conservation or local ecosystem services, such as water, but less than 10% of tourists were motivated by carbon sequestration as a reason to pay the fee. Most tour operators supported the additional fee. Our findings suggest that tourists are willing to pay higher fees to support conservation but that interest in paying for additional ecosystem services from parks may not extend to global and intangible benefits such as carbon sequestration.  相似文献   
8.
More diverse, perennial cropping systems often have better natural mechanisms for keeping pests at bay. But while scientists emphasise the broad benefits of conservation in terms of effective ecosystem functioning, farmers are more interested in biodiversity for the provision of food or of services such as shade or windbreaks. Because of their limited knowledge of the role of biodiversity in plant protection, farmers sometimes unconsciously disturb natural regulatory mechanisms. Some citrus farmers in Vietnam introduced sapodilla as an intercrop to diversify their source of income, and because this fruit tree requires little care. However, this apparently worthwhile attempt to combine two valuable crops has misfired. The ecological conditions that traditionally sustained natural pest control in citrus have been disturbed, thus trapping farmers in the pesticide treadmill. The weaver ant Oecophylla smaragdina stopped protecting citrus from stinkbugs and leaf-feeding caterpillars after facing competition from the black ant Dolichoderus thoracicus, which favours sapodilla trees as a nesting habitat. To avoid similar scenarios in the future, methods for linking scientific research on ecosystem functions with farmers' own knowledge, experience and priorities are presented. Examples are given of ways in which farmers in perennial cropping systems learn, and how scientists can facilitate this learning process.  相似文献   
9.
Biologists and conservation advocates have expressed grave concern over perceived threats to biological diversity. ``Biodiversity prospecting' – the search among naturally occurring organisms for new products of agricultural, industrial, and, particularly, pharmaceutical value – has been advanced as both a mechanism and a motive for conserving biological diversity. Economists and others have attempted to estimate the value of biodiversity for use in new pharmaceutical project research. In this paper we apply a new approach to estimating values: we employ two models of competition among differentiated products. Each model confirms previous findings that the value to private researchers of the ``marginal species' is likely to be small. The models can have very different implications with respect to social values, however. These findings underscore the need for a better understanding of the true meaning of diversity.Resources for the Future  相似文献   
10.
We present a model of a multispecies fishery, and we show the following. (i) Consumer preferences for seafood diversity can trigger a sequential collapse of fish stocks under open‐access fishery. (ii) The stronger the preferences are for diversity, the higher is the need for coordinated multispecies regulation. (iii) Second‐best optimal management of only one (or a few) species is less strict than socially optimal management of the same species. (iv) Myopic regulation of one species, ignoring spillovers to other species, can cause depletion of other stocks that would not be depleted under open access.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号