共查询到20条相似文献，搜索用时 921 毫秒
1.
三峡生态脆弱区耕地非市场价值评估 总被引：12，自引：0，他引：12
经济补偿是破解耕地保护外部效应外溢的有效途径。耕地非市场价值是耕地保护外部效应的核心,合理评估这部分价值对耕地保护经济补偿标准的确定具有重要的参考价值。本文运用条件价值法对三峡生态脆弱区耕地非市场价值进行了评估,对712 份有效问卷统计分析表明：① 生态脆弱与贫困耦合地区居民对耕地保护及耕地非市场价值的认知存在一定差异,经济、文化、社会、政府、心理等因素影响到民众的认知水平。② 农户对耕地非市场价值支付意愿率达到76.77%,城镇居民支付意愿率仅占到64.87%。受访者往往将耕地价值与自身的切身利益结合,更多地表现为理性经济人而非理性社会人。③ Probit 回归与Logit 回归分析表明,经济社会特征对受访者的决策产生一定影响。收入限制成为影响农户决策的主导因素,而捐赠历史与耕地保护认知成为影响城镇居民决策的主导因素。④ 农户与城镇居民的最大支付意愿分别为157.92元/(户·a) 和206.28 元/(户·a)。受访者单位耕地支付意愿为607.65 元/(hm2·a),最终评估出三峡生态脆弱区耕地非市场价值约为104.26×108元。 相似文献
2.
宝天高速公路沿线保护生态环境总经济价值评估 总被引：9，自引：1，他引：9
条件价值评估法是当前国际上流行的衡量环境物品非利用经济价值的唯一方法。通过调查居民针对不同环境状况变化的支付意愿,从而定量确定环境状况变化带来的经济效益和损失。针对宝天高速公路修建过程中沿线保护生态环境的问题,用支付卡的方法设计了320份调查问卷,调查了沿线居民对保护宝天高速公路沿线生态环境的支付意愿(WTP)。结果表明:在宝天高速公路修路过程中采取各种技术措施,使沿线的生态环境尽可能保持原样,沿线总共有84.33%的居民家庭有支付意愿,有支付意愿家庭的平均支付意愿为每年每户62.17元,将这一结果推广到面上,得到保护宝天高速公路沿线生态环境的总经济价值为:5781 756元。 相似文献
3.
额济纳旗生态系统恢复的总经济价值评估 总被引：73，自引：6，他引：73
条件估值方法是当前国际上流行的衡量环境物品非利用经济价值的唯一方法。通过调查 居民针对不同环境状况变化的支付意愿，从而定量确定环境状况变化带来的经济效益和损失。 针对额济纳旗生态系统恶化的现状，以投标支付卡的方法设计了７００份调查问卷，调查了黑河 流域居民恢复额济纳旗生态系统的支付意愿。分析结果表明，用２０年时问将额济纳旗生态系 统恢复到２０世纪８０年代初水平，黑河流域共有９２．３％的居民家庭存在支付意愿，有支付意 愿家庭的平均支付意愿为每年每户３７．９６元，但随居仲区域不同存在一定差异，其中黑河干流 区域居比平均支付意愿为每年每户４０．１５元，要高于周边地区居民平均每年每户３２．１０元的支 付意愿。在综合考虑不同区域居民支付意愿的差异，生态系统经济效益折旧率的基础上将支付 意愿弃时空尺度上加总，得到恢复额济纳生态系统总经济价值为 １６．３７×１０８元。 相似文献
4.
以流经浙江北部的重要河流东苕溪流域为研究区域,从社会效益的视角,遵循意愿调查评估法的思想和技术,估算东苕溪流域居民对水质改善的支付意愿金额,分析影响支付意愿的主要因素。结果发现：357份有支付意愿,占问卷的65.9%,支付意愿范围为104.01~128.54元,中位数的支付意愿为115.63元/（a·户）; 185份零支付愿意,占问卷的34.1%。其中影响流域居民支付意愿度的主要因素为：水质改善应为政府或企业的责任,流域居民不应是水质改善的承担者。同时,家庭人口数、文化程度、是否知道其饮用水源来自东苕溪与支付愿意度成正相关,对自家自来水状况的评价与支付意愿成负相关。基于此,研究提出适当增加水费用于水质改善;建立水环境信息制度,引导广大居民参与决策;严格执行环保标准,减少企业污染物排放等建议。 相似文献
5.
红树林湿地是处于海陆边缘的独特湿地生态系统,具有多种不可替代的生态功能和作用。以深圳湾海滨公园及其滨海休闲带为研究对象,利用条件价值评估法分析居民对深圳湾红树林湿地生态系统的认知度、支付意愿和服务意愿。结果显示:对于红树林湿地生态系统保护,同意支付金钱的受访者占56.38%,同意付出服务时间的占69.07%,居民对志愿服务形式的接受度更高。受访者对红树林湿地生态系统服务功能的人均支付意愿为260.62±76.07元/a,人均服务意愿为9.16±2.35 h/月。影响居民支付意愿和服务意愿的主要因素有受访者的性别、年龄、受教育程度、月收入、保护团体和志愿者经历等。研究表明WTW模型拟合度更高,适用于需要居民通过劳动和服务方式参与环境和资源保护的价值评估。 相似文献
6.
干旱区绿洲城市普遍存在居住区绿地率低、居住环境质量不高的问题,量化居民对居住区绿地的支付意愿及城市居住区绿地的愉悦价值,有利于正确评价城市绿地的价值,科学规划城市空间。基于问卷调查,利用支付卡式条件价值法和Tobit模型测算乌鲁木齐市居民对改善居住区绿地建设与服务的支付意愿,借助计量模型的假设检验对其影响因素进行定量分析,并基于支付意愿得到城市居住区绿地的愉悦价值。结果表明：（1） 乌鲁木齐市居民人均支付意愿为148.75 元·a–1,远高于东部地区,不同属性居住区的支付意愿为商业小区>单位大院>自建房。（2） 受访者性别、收入、家庭结构、需求偏好、认知与意识等特征对其支付意愿有显著影响,且非虚拟变量对决策的影响程度可借助经济学中的“边际理论”度量。（3） 乌鲁木齐市居住区绿地愉悦价值为3.31×108 元·a–1,利用居民对绿地生态功能和社会功能的认知赋分,发现其生态服务价值略大于社会服务价值。研究可为建立不同尺度绿地支付机制,提升绿洲城市居住区人居环境质量,优化城市空间布局及维护绿洲城市生态平衡提供科学参考。 相似文献
7.
统筹推进山水林田湖草沙综合治理是赋予荒漠化治理的新任务,建立市场化、多元化生态补偿机制是实现荒漠化治理重要手段。基于阿拉善左旗224户居民调查数据,采用支付卡式条件价值评估法和Heckman两阶段模型,对沙区居民生态补偿支付意愿与水平及其影响因素进行实证分析。结果表明：86.61%居民具有生态补偿支付意愿,13.39%居民不具有生态补偿支付意愿;沙区居民生态补偿户均年支付意愿值为649.3元,占居民户均收入的0.76%。沙区居民生态补偿支付意愿和支付水平受个人特征、家庭特征以及对生态补偿认知特征影响。因此,从加强生态补偿的政策宣传,鼓励多样化的就业方式,建立多元化的生态补偿支付方式以及构建差异化生态补偿征收标准方面来提高沙区居民生态补偿支付意愿和支付水平,以期为构建多元化生态补偿机制以及完善生态补偿政策提供参考。 相似文献
8.
沙漠化逆转生态经济效益的非市场价值评估——以宁夏盐池县为例 总被引：2，自引：1，他引：1
采用条件价值评估法定量评估了宁夏盐池县沙漠化逆转的生态经济效益。运用SPSS对样本各因素与支付意愿和支付意愿值的相关性进行分析,结果表明：高收入、高教育水平、环保意识较强的居民,愿意支付的比例高;高收入、高教育水平、环保意识较强的城镇居民,支付意愿值高。根据总样本参数估计得出,盐池县沙漠化逆转的5年总生态经济效益的现值为3.813×107元。若一次性支付,盐池县沙漠化逆转的总生态经济效益为3.415×107元;根据各乡镇居民平均支付意愿值的参数估计得出,盐池县沙漠化逆转的5年总生态经济效益的现值为3.895×107元,调查对象的平均支付意愿值在区域中存在较大的差异。 相似文献
9.
10.
农户耕地保护意愿影响因素研究 总被引：2，自引：0，他引：2
以福建厦门、福州、南平为例,通过对627户农户的问卷调查,全面比较分析不同经济发展水平地区农户耕地保护意愿的影响因素,结果表明:(1)家庭特征是影响各地区农户耕地保护意愿的基础与普遍性因素;(2)经济价值认知是影响经济欠发达地区农户耕地保护意愿的核心因素;(3)用途转换收益是影响经济发达地区农户耕地保护意愿的关键因素;(4)政策相关特征是农户耕地保护意愿的导向性因素。为提升农户耕地保护意愿、守住耕地资源红线,建议结合地方经济水平,制定出符合当地实际的耕地保护政策;尊重农户意愿,合理调整耕地保护政策执行方式;建立符合市场经济要求的农村土地流转机制,推进耕地集中经营。 相似文献
11.
《The Professional geographer》1984,36(1):106-142
Book Reviewed in this article: Development and Environment in Peninsular Malaysia . S. Robert Aiken, Colin H. Leigh, Thomas R. Leinbach, Michael R. Moss. The Rural-Urban Fringe: Canadian Perspectives . Ken B. Beesley and Lorne H. Russwurm, eds. Women and Development . Lourdes Benería, ed. The Border that Joins: Mexican Migrants and U.S. Responsibility . Peter G. Brown and Henry Shue, eds. Cities of the World: World Regional Urban Development . Stanley D. Brunn and Jack L. Williams, eds. Time Resources, Society, and Ecology: On the Capacity for Human Interaction in Space and Time (Vol. I, Preindustrial Societies). Tommy Carlstein. Urban Geography . David Clark. Spanish City Planning in North America . Dora P. Crouch, Daniel J. Garr, and Axel I. Mundigo. Not On Our Street: Community Attitudes to Mental Health Care . M. J. Dear and S. M. Taylor Unequal growth: Urban and Regional Employment Change in the U.K. Stephen Fothergill and Graham Gudgin. Agricultural Land in an Urban Society . Owen J. Furuseth and John T. Pierce. The Petroleum Industry in Oil-Importing Developing Countries . Fariborz Ghadar. Historical Understanding in Geography, An Idealist Approach . Leonard Guelke. Regional Planning in Europe . R. Hudson and J. R. Lewis, eds. Remote Sensing for Resource Management . Chris J. Johannsen and James L. Sanders, eds. Geography and The State . R. J. Johnston. Texas Graveyards: a Cultural Legacy . Tlrry G. Jordan. The Politics of Location: An Introduction . Andrew Kirby. A Social Geography of the City . David Ley. Energy and the Future . Douglas MacLean and Peter Brown, eds. The Natural Environment of Newfoundland Past and Present . A. G. Macpherson and J. B. Macpherson, eds. Tourism: Economic, Physical and Social Impacts . Alister Mathieson and Geoffrey Wall. Railroads and Land Grant Policy: A Study in Government Intervention . Lloyd J. Mercer. Progress in Rural Geography . Michael Pacione, ed. Progress in Urban Geography . Michael Pacione, ed. Models of Spatial Inequality: Settlement Patterns in Historical Archaeology . Robert Paynter. Natural Hazard Risk Assessment and Public Policy, Anticipating the Unexpected . William J. Petak and Arthur A. Atkisson. The Nature of Geomorphology . Alistair F. Pitty. Regional Conflict and National Policy . Kent A. Price Women and Spatial Change: Learning Resources for Social Science Courses . Arlene C. Rengert and Janice J. Monk, eds. Urban and Regional Analysis for Development Planning . Richard Rhoda. Rivers: Form and Process in Alluvial Channels . Keith Richards. This Remarkable Continent: An Atlas of United States and Canadian Society and Culture . John F. Rooney, Jr., Wilbur Zelinsky, and Dean R. Louder, gen. eds. The Origins of Open-Field Agriculture . Trevor Rowley, ed. Residential Location Determinants of the Older Population . Gundars Rudzitis. Borderland Sourcebook: A Guide to the Literature on Northern Mexico and the American Southwest . Ellwyn R. Stoddard, Richard L. Nostrand, and Jonathan P. West, eds. Arctic and Antarctic . David Sugden. Tall Timbers Ecology and Management Conference, February 22–24, 1979, Proceedings No. 16 . Graphic Communication and Design in Contemporary Cartography (Progress in Contemporary Cartography , Vol. II). D. R. Fraser Taylor, ed. Living with Energy Shortfall: A Future for American Towns and Cities . Jon Van Til. The United States: Habitation of Hope . J. Wreford Watson. Air Photo Interpretation for Archaeologists . D. R. Wilson. Urban and Rural Change in West Germany . Trevor Wild, ed. Population and Resources . Harry Robinson. 相似文献
12.
<正>1 Introduction In 2013,Chagusaba,which is traditional tea-grass integrated system in Shizuoka,were accepted as new world heritage site of agriculture.Shizuoka prefecture occupies a variety of elevations,from 0 to 3000m or more above sea level.Because of the diversity of land features and climates,this area produces 167 agricultural commodities.In addition,a lot of traditional agriculture and over200 local native varieties of crops have been conserved in Shizuoka 相似文献
13.
MIN Qingwen 《资源与生态学报(英文版)》2014,5(4):289-290
<正>There are more than 10000 years of agricultural development history in the world that has provided very fruitful and ingenious traditional knowledge and experiences reflecting the evolution of humanity and the nature.In2002,the Food and Agriculture Organization of the United Nations(FAO)initiated an international partnership initiative of"Conservation and Adaptive Management of Globally Important Agricultural Heritage Systems 相似文献
14.
15.
《The Professional geographer》1984,36(2):250-283
Book Reviewed in this article: Geography and the Third World. International Seminar, 14–18 May 1980, Kuala Lumpur, Malaysia . Ishmail Ahmad and Jamaluddin Md Jahi, eds. The Growth Dilemma: Residents' Views and Local Population Change in the United States . Mark Baldassare. Sport and Place: A Geography of Sport in England, Scotland & Wales . John Bale. The Deindustrialization of America: Plant Closings, Community Abandonment, and the Dismantling of Basic Industry . Barry Bluestone and Bennett Harrison. Selected Essays 1963–1975: Carl O. Sauer . Bob Callahen, ed. Housing and Planning in the Countryside . G. Clark. Conflict, Politics and the Urban Scene . Kevin R. Cox and R. J. Johnston, eds. Thematic Maps: Their Design and Production . David J. Cuff and Mark T. Mattson. Wine: A Geographic Appreciation . Harm Jan de Blij. USSR in Maps . J. C. Dewdney. Political Geography: A Contemporary Perspective . Ramesh D. Dikshit. Rethinking Human Adaptation . Rada Dyson-Hudson and Michael A. Little, eds. Sacred Sands: The Struggle for Community in the indiana Dunes . J. Ronald Engel. Geography of the Biosphere . A. Furley and Walter W. Newey. Disaster and Reconstruction . Robert Geipel. Glasgow: The Making of a City . Andrew Gibb. Design for Arid Regions . Giden S. Golany, ed. Urbanization and Cancer Mortality: The United States Experience, 1950–1975 . Michael R. Greenberg. Geology in the Nineteenth Century: Changing Views of a Changing World . Mott T. Greene. Colonización y Destrucción de Bosques en Panamá . Stanley Heckadon Moreno and Alberto McKay, eds. Urban Geography: A First Approach . David T. Herbert and Colin J. Thomas. The Visual and Spatial Structure of Landscapes . Tadahiko Higuchi. Climate from Tree Rings . M. K. Hughes, P. M. Kelly, J. R. Pilcher, and V. C. LaMarche, Jr., eds. The structure of Nineteenth Century Cities . James H. Johnson and Colin G. Pooley, eds. The American Planner: Biographies and Recollections . Donald A. Krueckeberg, ed. Urban Land Policy For the 1980s, the Message for State and Local Government . George Lefcoe, ed. Regional Planning: Evolution, Crisis and Prospects . Gill C. Lim, ed. Relevance and Ethics In Geography . Bruce Mitchell and Dianne Draper. China: The Geography of Development and Modernization . Clifton W. Pannell and Laurence J. C. MA. The Urban Retailing System . Robert B. Potter. Hants. Nonconventional Energy Resources . Philip R. Pryde. Caribbean Migrants: Environment and Human Survival on St. Kitts and Nevis . Bonham C. Richardson. Population and Resources . Harry Robinson. East Los Angeles: History of A Barrio . Ricardo Romo. Integrated Impact Assessment . Frederick A. Rossini and Alan L. Porter, eds. Environmental Aesthetics: Essays in Interpretation . Barry Sadler and Allen Carlson, eds. Earthwatch . Charles Sheffield. Field Techniques and Research Methods in Geography . Robert H. Stoddard. Haiti: Land of Poverty . Robert J. Tata. Weathering and Erosion: Sources and Methods in Geography . Stephen T. Trudgill. Once Beneath the Forest. Prehistoric Terracing in the Río Bec Region of the Maya Lowlands . B. L. Turner, II. The Historical Geography of Scotland since 1707 . David Turnock. 相似文献
16.
《The Professional geographer》1985,37(2):226-262
Book Reviewed in this article: The City in Cultural Context . John Agnew, John Mercer, David Sopher, eds. Soils and Geomorphology Peter W. Birkeland. Urbanization and Settlement Systems, International Perspectives . L. S. Bourne, R. Sinclair, and K. Dziewoński. eds. An Introduction to Urban Historical Geography . Harold Carter. Overshoot, The Ecological Basis of Revolutionary Change . William J. Catton, Jr. Rivers of the World . Eberhard Czaya. Jewish Communities in Frontier Societies: Argentina, Australia and South Africa . Daniel J. Elazar with Peter Medding. Color in Public Spaces: Toward a Communication-Based Theory of the Urban Built Environment. Kenneth E. Foote. Spatial Statistics and Models. Gary L. Gaile and Cort J. Willmott, eds. Mega-Geomorphology. Rita Gardner and Helen Scoging, eds. Technological Change and Regional Development. Gillespie, ed. The Arid Lands: Their Use and Abuse. R. L. Heathcote. The Location of Industry in Britain. A. G. Hoare. Groundwater as a Geomorphic Agent . R. G. LaFleur, ed. Rural Public Services: International Comparisons. Richard E. Lonsdale and Gyorgy Enyedi, eds. Saving Water in a Desert City. William E. Martin, Helen M. Ingram, Nancy K. Laney, and Adrian H. Griffin. Water Resources: Distribution, Use and Management. John R. Mather. Transnationals and the Third World: The Struggle for Culture. Armand Mattelart. South Hadley, MA: USGS Digital Cartographic Data Standards. R. B. McEwen, R. E. Witmer, and B. S. Ramey, eds. The Ecosystem Concept in Anthropology. Emilio F. Moran, ed. Boulder, CO: Women, Men, and the International Division of Labor. June Nash and Maria Patricia Fernandez-Kelly, eds. Nuclear Power: Assessing and Managing Hazardous Technology. Martin J. Pasqualetti and K. David Pijawka, eds. Mary Somerville and the Cultivation of Science 1815-1840. Elizabeth Chalmers Patterson. An Introduction to Coastal Geomorphology. John Pethick. Late Quaternary Environments of the United States , Vol. 1, The Late Pleistocene. Stephen C. Porter, ed. Planning and Ecology. R. D. Roberts and T. M. Roberts, eds. Regionalism and the Pacific Northwest. William G. Robbins, Robert J. Frank, and Richard E. Ross, eds. Environment and Health. Anthony J. Rowland and Paul Cooper. Sunbelt/Snowbelt: Urban Development and Regional Restructuring. Larry Sawers and William K. Tabb, eds. The Bad Earth. Environmental Degradation in China. Vaclav Smil. Armonk, NY: Voyage into Substance: Art, Science, Nature, and the Illustrated Travel Account, 1760–1840. Barbara Maria Stafford. The Institute of British Geographers: The First Fifty Years. Robert W. Steel. Visions of the Past. Christopher Taylor and Richard Muir. Glacial Lake Agassiz. J. T. Teller and Lee Clayton, eds. The Tule Breakers: The Story of the California Dredge. John Thompson and Edward A. Dutra. The Balkan City 1400–1900. Nikolai Todorov. Explanation, Prediction and Planning: the Lowry model. Michael J. Webber. Mercedes Reales: Hispanic Land Grants of the Upper Rio Grande Region. Victor Westphall. The World Atlas of Revolutions. Andrew J. M. Wheatcroft. The West European City, A Social Geography. Paul White. Urban Elites and Mass Transportation. J. Allen Whitt. Princeton, NJ: Urban Life In Contemporary China. Martin King Whyte and William L. Parish. The Demand for Energy in the Soviet Union. David Wilson. London and Canberra: Rethinking Geographical Inquiry. J. David Wood, ed. 相似文献
17.
《The Professional geographer》2013,65(1):85-89
Reviews of geographic software in this article: DEMO-GRAPHICS: WORLD POPULATIONS AND PROJECTIONS. ESP GAUSS. CEMODEL S. Damus LIMDEP. William H. Greene MICROSTAT 4.1 OTIS PCIPS. (Personal Computer Image Processing System). H.J. Meyers and R. Bernstein. REGRESSION ANALYSIS OF TIME SERIES (RATS) SPSS/PC+ URBAN DATA MANAGEMENT SOFTWARE (UDMS) 相似文献
18.
《The Professional geographer》1983,35(2):230-260
Book Reviewed in this article: Rabat: Urban Apartheid in Morocco . Janet Abu -Lughod . Marketplaces in a Developing Country: The Case of Western Nigeria . Isaac Ayinde Adalemo . Farming Development and Space: A World Agricultural Geography . Bernd Andreae . Section and Party: A Political Geography of American Presidential Elections, from Andrew Jackson to Ronald Reagan . J. Clark Archer and Peter J. Taylor . Women and Space: Ground Rules and Social Maps . Shirley Ardener , ed. European Progress in Spatial Analysis . R. J. Bennett , ed. The Origins of Academic Geography in the United States . Brian W. Blouet Geographic Perspectives on Global Problems . Ronald Reed Boyce . Seasonal Dimensions to Rural Poverty . Robert Chambers , Richard Longhurst and Arnold Pacey eds. The New Nationalism and the Use of Common Spaces: Issues in Marine Pollution and the Exploitation of Antarctica . Jonathan I. Charney , ed. Communications Tomorrow: The Coming of the Information Society . Edward Cornish , ed. The Design of Suburbia . Arthur Edwards . Explorer on the Northern Plains: Lieutenant Gouverneur K. Warren's Preliminary Report of Explorations in Nebraska and Dakota in the Years 1855–56–57. With an Introduction by Frank N. Schubert . The Changing Climate: Responses of the Natural Flora and Fauna . Michael J. Ford . Essentials of Physical Geography . Robert E. Gabler , Robert J. Sager , Sheila Brazier , and Daniel L. Wise. The Road to Jaramillo . William Glen . Valued Environments . John R. Gold and Jacquelin Burgess , eds. Proximity and Preference: Problems in the Multidimensional Analysis of Large Data Sets . Reginald G. Golledge and John N. Rayner , eds. A Search for Common Ground . Peter Gould and Gunnar Olsson , eds. Geography: Its History and Concepts . Arild Holt -Jensen . A Population Geography . Huw R. Jones . The Human Mosaic: A Thematic Introduction to Cultural Geography, 3rd ed. Terry G. Jordan and Lester Rowntree . Urban Social Geography: An Introduction . Paul Knox . The Anatomy of Job Loss: The How, Why and Where of Employment Decline . Doreen Massey and Richard Meegan . The Information Society as Post-Industial Society . Yoneji Masuda . Map Librarianship, 2nd ed. Harold Nichols . India: Cultural Patterns and Processes . Allen G. Noble and Ashok K. Dutt , eds. The God that Limps: Science and Technology in the Eighties . Colin Norman . Geography: An Introductory Perspective . Robert E. Norris , Keith D. Harries and John D. Vitek . The Politics of Technology Assessment . David M. O'Brien and Donald A. Marchand . Ethnic Segregation in Cities . Ceri Peach , Vaughan Robinson and Susan Smith , eds. Churches and Church Membership in the United States, 1980 . Bernard Quinn , Herman Anderson , Martin Bradley , Paul Goetting and Peggy Shriver . Energy in Australia: Politics and Economics . Hugh Saddler . Development from Above or Below? The Dialectics of Regional Planning in Developing Countries . Walter B. Stóuhr and D. R. Fraser Taylor , eds. Human Impact on the Ecosystem . Joy Tivy and Greg O'Hare . Plants and People: Vegetation Change in North America . Thomas R. Vale . The Mapmakers: The Story of the Great Pioneers in Cartography from Antiquity to the Space Age . John Noble Wilford . 相似文献
19.
Raanan Katzir 《寒旱区科学》2013,5(6):0767-0768
Desertification is a global phenomenon that affects about two billion people. It occurs in arid zones where the annual precipitation is below 400 mm, partic- ularly in the marginal areas of the world＇s largest deserts. It is a result of water and wind erosion, over- grazing, global warm-ing, improper soil cultivation, and increased pressure ot population growth, and it causes degradation of soil and natural and agricultural vegetation. The direct result is less food for people and livestock, which influences pop- ulation and animal husbandry fluctuations. Despite ef- forts to combat and reduce desertification, the affected areas are annually increasing. 相似文献
20.
《The Professional geographer》1987,39(1):94-129
Book Reviewed in this article: The Rice Economy of Asia . Randolph Barker and Robert W. Herdt with Beth Rose. Using Microcomputers: A Guidebook for Writers, Teachers, and Researchers in the Social Sciences . Blaine A. Erie—the Lake that Survived . Noel M. Burns. Geology and Society . Donald R. Coates. Caves and Karst of Kentucky . Percy H. Dougherty, ed. Altered Harvest: Agriculture, Genetics, and the Fate of the World's Food Supply . Jack Doyle. The Middle East and North Africa, A Political Geography . Alasdair Drysdale and Gerald H. Blake. Clamor at the Gates. The New American Immigration . Nathan Glazer, ed. Development and the Landowner: An analysis of the British experience . Robin Goodchild and Richard Munton. Discovering Landscape in England and Wales . Andrew Goudie and Rita Gardner. The Modern Plantation in the Third World . Edgar Graham and Ingrid Floering. Social Relations and Spatial Structures . Derek Gregory and John Urry, eds. The World Food Problem 1950–1980 . David Grigg. Costa Rica: A Geographical Interpretation in Historical Perspective . Carolyn Hall. The Urbanization of Capital: Studies in the History and Theory of Capitalist Urbanization . David Harvey Consciousness and the Urban Experience: Studies in the History and Theory of Capitalist Urbanization . David Harvey. Reviving Main Street . Deryck Holdsworth, ed. Rural Roads and Poverty Alleviation . John Howe and Peter Richards, eds. Uneven Development in Southern Europe: Studies of Accumulation, Class, Migration and the State . Ray Hudson and Jim Lewis, eds. Karst Geomorphology . J. N. Jennings. The Geomorphology of North-west England . R. H. Johnson, ed. Climate Impact Assessment: Studies of the Interaction of Climate and Society . Robert Kates, Jesse Ausubel, Mimi Berberian, eds. Public Service Provision and Urban Development . Andrew Kirby, Paul Knox, and Steven Pinch, ed. State and Market: The Politics of the Public and the Private . Jan-Erik Lane, ed. Living Cities . Twentieth Century Fund Task Force on Urban Preservation Policies. World Climatic Systems . John G. Lockwood. Urban Ethnicity in the United States. New Immigrants and Old Minorities . Lionel Maldonaldo and Joan Moore, eds. Culture and Conservation: The Human Dimension in Environmental Planning . Jeffrey A. McNeely and David Pitt, eds. The Andean Past. Land, Societies, and Conflicts . Magnus Mörner. Gaia: An Atlas of Planet Management . Norman Myers, ed. Progress in Industrial Geography . Michael Pacione, ed. Progress in Political Geography . Michael Pacione, ed. Rivers and Landscape . Geoff Petts and Ian Foster. Urbanization and Planning in the 3rd World: Spatial Perceptions and Public Participation . Robert B. Potter. One Island, Two Nations? A Political Geographical Analysis of the National Conflict in Ireland . D. G. Pringle. Circulation in Third World Countries . R. Mansell Prothero and Murray Chapman. The Ozarks Outdoors: A Guide for Fishermen, Hunters, and Tourists . Milton D. Rafferty. Suburban Burglary: A Time and a Place for Everything . George Rengert and John Wasilchick. Geomorphology and Soils . K.S. Richards, R.R. Arnett, and S. Ellis, eds. The Homes and Homeless of Post-War Britain . Frederick Shaw. Indochinese Refugees in America . Paul J. Strand and Woodrow Jones, Jr. Wild Horses and Sacred Cows . Richard Symanski. Forever Wild: Environmental Aesthetics and the Adirondack Forest Preserve . Philip G. Terrie. The Regional Economic Impact of Technological Change . A.T. Thwaites and R.P. Oakey, eds. The Good Life . Yi-Fu Tuan. 相似文献