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821.
1 IntroductionIn January 2003, undisturbed sediments were tak-en from a grid of 22 sampling stations (from 32.5° to37°N, 122° to 125°E) during the cruise of an ecologi-cal survey of the over-winter ground for anchovy inthe Huanghai Sea. Meiofaunal abundance varied from55.3 to 152.0 ind/cm2 [(95.4 ±27.0) ind/cm2], with81% to 93% [(83.1 ±22.7) ind/cm2] of the specimensbeing nematodes. Up to now, twenty-nine species ofmarine nematodes have been recorded from theHuanghai Sea (Zhang and P…  相似文献   
822.
823.
谢莉 《热带地理》2006,26(4):365-369
南岳衡山是我国南方唯一的一处五岳名山,历史上也是我国南方最大的文化、宗教活动中心之一,素享"五岳独秀"、"文明奥区"、"宗教圣地"、"抗战名山"等盛名.在抗日战争中,衡山曾一度成为国民政府的军事指挥中心,留下了大量的抗战军事文化史话、遗存和胜迹等文化旅游资源.衡山抗战军事文化资源极具个性特色,拥有较高的开发利用价值.文中从衡山抗战军事文化资源形成的历史地理背景入手,全面阐述了衡山抗战军事文化资源,探讨如何把衡山"抗战名山"资源转变为现实旅游资源或现实的经济优势,提升南岳衡山生态文化旅游的品位,实现南岳衡山  相似文献   
824.
The paper summarises the history of human settlement in the Sudetes from the Bronze Age. A more intensive stage was reached in the Middle Ages when settlers from the west established new villages deep in the mountain valleys. By the beginning of the 20th century the Sudetes were already overpopulated but after a near-complete ethnic replacement from a German to a Polish population in 1945–8, population continued to grow until the 1980s. However, the economic system was hardly sustainable by this time. There were many polluting industries in the region and massive transboundary pollution from adjacent areas of Czechoslovakia and Germany had a devastating effect on the forests. Moreover, subsidised state agriculture placed heavy pressure on vulnerable mountain grazings. Since 1989 there has been a process of deindustrialisation in the Sudetes and surrounding areas and, with the disappearance of the state farms and the reduction in subsidies, agriculture is now better adjusted to the natural potential and is complemented by a promising start with agrotourism. The population of the region is growing relatively slowly (0.8% per annum 1956–1999), with the rural areas now in decline. A sustainable future for the region is now a possibility, but while there is a consensus for continued environmental reconstruction, supported by alternative economies, this will have to be carefully managed in the years ahead when EU accession may bring heavier development pressures than those evident at the moment. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
825.
The establishment of local self-government was a key part of the post-1989 transformation in East and Central Europe. Local government in both Western and East and Central Europe has increasingly been expected to play a role in local economic development (LED). Local government is one important agent in the complex processes of building 'institutional thickness' to ensure the development of local economies and the quality of life of inhabitants. This paper presents the results of a national postal questionnaire survey of the LED role of the lowest level of local self-government in Poland, the gmina or commune. The paper establishes a baseline of knowledge regarding: the local economic problems faced by communes; their attitudinal, strategic and organisational responses; and the main factors which are hindering the communes' LED role. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
826.
The paper presents an overview of the Upper Adriatic as a contact area between different cultural, social, economic and political entities, producing potential conflicts in the last century. The first part of the 20th century represented a classic example of geopolitical conflict through two World Wars and their related Peace Conferences that deeply impacted the region. Conflicts arising from the mid-century solution of the Trieste question transformed the Upper Adriatic into a laboratory of contemporary political geographic transformation. Changing geopolitical patterns have also modified the political, social and ethnic construction of the Upper Adriatic. The process of creating new international boundaries in the region ended in 1991 with the independence of Slovenia and Croatia. Through these geopolitical transformations in the Upper Adriatic, new political geographic attitudes evolved. Early on, Ratzel's geopolitical principles of defining borders as power barometers between neighbors dominated. More recently, attitudes have reflected modern integrative ideas with a focus on looking for harmony and the elimination of international conflicts. Greater attention has thus been given to the political geography of `everyday life', inter-ethnic relations, and cross-border contacts. Hence, `new' borderlands of the Upper Adriatic are more receptive to integration because they seek to overcome conflicts caused by the division of traditionally homogeneous spaces as local level political and ideological hindrances disappear. The region divided among Italy, Slovenia, and Croatia is becoming a new and special type of European borderland in the new century.  相似文献   
827.
龙里高山草原形成机理与旅游资源初评   总被引:4,自引:0,他引:4  
张竹如  唐波  蒋玺  李燕 《中国岩溶》2001,20(1):53-57
龙里高山草原是一个待开发的风景旅游区,它由海拔1578~ 1674m的山巅坪台及深切到海拔1100m左右的岩溶峡谷组合而成,包括无边无际的平坦草原、险而奇的岩溶森林峡谷,及残丘、岩溶洼地、峰林等多种类型的地貌。草原坪台上覆盖着草甸,岩溶峡谷内长满竹林及阔叶混合林,是开展多种旅游项目不可多得的绿色旅游资源。该景区的形成与特殊的地质地貌演化历史有关,即新构造运动使得区内地壳不断抬升,分布在平缓的箱状背斜轴部的石炭系石灰岩上的石英砂岩,由于其抗风化能力强,而残留在一级剥夷面上成为山巅坪台,即方山地貌。该旅游区具有“奇、新、特”及距贵阳近的得天独厚的旅游优势。   相似文献   
828.
吉林省旅游产业发展空间结构研究   总被引:2,自引:2,他引:0  
曹艺民  袁家冬 《地理科学》2004,24(6):764-766
旅游产业发展空间结构是旅游产业发展战略和规划的关键与核心。为了科学合理地综合开发旅游资源,建立和发展旅游产业,有必要运用科学的方法和区域经济发展规划的系统理论,研究和分析旅游产业发展的空间结构。这对于制定和实施区域旅游发展规划有着重要的意义。  相似文献   
829.
第四纪环境研究新理论   总被引:4,自引:4,他引:0  
On the basis of extensive survey to the Quatemary paleosols, soils and weathering layers in the vast northern China and the Loess Plateau, we found some unusually special phenomena of chemical components such as unsuccessive illuvium, twin illuviums, unusually thick illuvium and multi-illuviums etc. According to the analysis on the content of CaCO3 and the data of penetrating experiment, a new theory of illuvial depth or removal depth of CaCO3 in weathering and leaching belt was constructed, which indicates that the time of CaCO3 removing to the illuvial depth is very short,and the effect of time factor on illuvial depth can be ignored. The theory can be taken as a credible foundation for studying many geological and geographical problems in weathering and leaching belt.When the illuvial depth of CaCO3 iS bigger than the thickness of developing belt of soil or paleosol, it can be determined that the paleosol has turned into weathering crust. When the illuvial depth of CaCO3 is bigger than the thickness of paleosol, paleosol is leaching moderately acid soil. When two, three layers or unusually thick CaCO3 illuviums exist in the same weathering section or at the bottom of the same paleosol, there were two or more periods forming paleosol and corresponding climatic stages at that time. On the basis of the equation of relationship between mean annual rainfall (y) and illuvial depth of CaCO3 (x) (y = 305.5x 168.5) determined in the paper, mean annual precipitation during the development of paleosol can be calculated.  相似文献   
830.
肇庆市"千里旅游走廊"开发的理论解释与策略研究   总被引:1,自引:1,他引:0  
肖光明 《热带地理》2004,24(4):381-386
运用点轴渐进式扩散理论、旅游地生命周期理论、阴影区理论对首批中国优秀旅游城市肇庆开发"千里旅游走廊"的行动进行了探讨,认为这是肇庆区域旅游发展的必然要求和有效手段,具有战略意义;分析了其旅游空间总体布局和旅游资源的主要特色,并提出若干开发策略.  相似文献   
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