居民对生活质量评估与区域经济发展的定量分析   总被引：12，自引：1，他引：12  

李小建  乔家君 《地理科学进展》2002,21(5):484-490

通过对全国 1 5个省份 1 9个县 (市 )近万户调查数据的分析得出 :居民对自己生活状况的主观评价与区域经济发展水平并不呈现显著正相关关系 ;居民对自己生活状况的满意程度在城乡间、县际间存在一定差异 ,一般为城市高于农村。不同县域居民对影响其生活质量的主要因子的认识有很强的一致性。区域发展研究中 ,应当关注居民生活质量评估指标。  相似文献   

国内外城市生活垃圾处理概况   总被引：8，自引：0，他引：8  

孙向阳  宋树林 《海岸工程》1999,18(4):92-95

介绍了国内和国外工业发达城市生活垃圾的处理概况,包括垃圾的收集、运输和处理工艺及其发展方向,提出了国内在城市垃圾处理上存在的一些问题。  相似文献   

Living coccolithophores in the western Pacific Ocean with mesoscale eddies     

Danyue Huang  Haijiao Liu  Jun Sun  Yuqiu Wei  Liuyang Li  Guicheng Zhang  Laxman Pujari 《海洋学报(英文版)》2021,40(6):111-128

Living coccolithophores(LCs) are regarded as a group of calcifiers and play important roles in global carbon cycle.This study used microscopic observations of LCs in the western Pacific Ocean to investigate their community structure and biodiversity,especially to test whether local physical traits(mesoscale eddies) could explain their biogeographic distributions during autumn of 2017.The coccolithophore calcite inventory based on carbon-volume transformation was estimated in this study.A total of 28 taxa of coccospheres and 19 types of coccoliths were identified from 161 samples.Gephyrocapsa oceanica was the most predominant species in all the coccolithophore community,followed by Florisphaera profunda,Emiliania huxleyi,Umbilicosphaera sibogae,Gladiolithusflabellatus and Umbellosphaera tenuis.The abundance of coccospheres and coccoliths ranged from 0 to 26.8×10~3 cells/L and from 0 to 138.5×10~3 coccoliths/L,averaged at 4.2×10~3 cells/L and 10.9×10~3 coccoliths/L,respectively.This study indicated that coccolithophore community in the survey area can be clustered into four groups.Three ecological niches of coccolithophores were characterized by their vertical profiles and multivariate statistical analysis.Coccolithophore abundance and species composition were remarkably different among warm-eddy region,G.oceanica dominated warm-eddy region,while F.profunda dominated warm-eddy and none-eddy region.The average values of estimated particulate inorganic carbon,particulate organic carbon were0.197 μg/L and 0.140 μg/L,respectively.The current field study widened the dataset of coccolithophores in western Pacific Ocean.  相似文献   

Quantifying the vertical distribution pattern of land-use conversion in the loess hilly region of northern Shaanxi Province 1995–2015     

Cao  Zhi  Li  Yurui  Liu  Zhengjia  Yang  Lingfan 《地理学报(英文版)》2019,29(5):730-748

Journal of Geographical Sciences - The mountainous and hilly region plays an important role in ecological safety and production in China. However, recent studies have poorly characterized the...  相似文献   

传统村落活态性定量评价研究   总被引：9，自引：1，他引：8  

邹君  陈菡  黄文容  刘沛林 《地理科学》2020,40(6):908-917

提出传统村落活态性概念,从物质遗产、非物质遗产和村落居民3个方面构建传统村落活态性评价指标体系。通过实地踏勘、文献查阅、问卷调查等方法获取数据,对湖南省大湘西地区3个不同类型的传统村落活态性进行定量评价。结果表明：① 整体上失活问题较为普遍,东山村活态性最差,小市村次之,地笋苗寨活态性最好。② 从系统层来看,物质遗产是影响村落活态性最为重要的贡献因子,从要素层来看,人口结构、历史建筑和格局肌理是影响传统村落活态性的主要贡献因子。③ 从系统层来看,非物质遗产是导致湘西地区传统村落失活的主要因素,从要素层来看,人口数量、传统技能技艺、自然生态环境是导致传统村落失活的主要因子。④ 总体来看,旅游型传统村落活态性好于城镇化型和传统型村落。但是,不同类型村落的活态性贡献因子和失活因子均存在一定差异。  相似文献   

The distribution of meiofauna on back‐reef sandy platforms in the Maldives (Indian Ocean)     

Federica Semprucci  Paolo Colantoni  Giuseppe Baldelli  Marco Rocchi  Maria Balsamo 《Marine Ecology》2010,31(4):592-607

The Maldivian archipelago comprises some of the most characteristic and significant world atoll systems, but the meiobenthic assemblages of these islands continue to be largely unknown. To investigate variations in meiofaunal spatial distribution and biodiversity in back‐reef platforms, three transects were studied, two at Felidhoo (the north and east sides) and one at South Malé. The sedimentological features of the samples obtained were also analyzed to further current knowledge on the relationships that exist between sediments and meiofauna. Our results reveal that the meiofaunal assemblage at these locations is well diversified and includes 20 major taxa. Nematodes and copepods are dominant, together forming 68% of the total meiofauna, followed by platyhelminthes, polychaetes and ostracods. The nematode assemblage is very rich and composed of 34 families and 123 genera – 96 of which (78%) set new records for the Maldives. The structures of the meiofaunal and nematode assemblages are relatively similar on the ‘large‐scale’ level (i.e. when the different platforms are compared) and reveal a low β‐diversity. However, significant dissimilarities were detected within each platform, emphasizing that such ‘small‐scale’ differences are the main factors determining the structure of the meiofauna and, in particular, the nematode assemblages. Although significant differences were not detected between the transects, greater levels of dissimilarity were recognized at North Felidhoo. Here, the building of inclined deposit layers plays a significant role in increasing the heterogeneity of the platform habitats and sediments, confirming the great importance of sediment granulometry as an environmental variable. Indeed, a close relationship is observed between meiofauna (especially for the nematodes) and grain size, which appears to control the structure, diversity and trophic composition of the Maldivian meiofauna assemblages, thus highlighting the high biodiversity existing in the medium‐coarse sands.  相似文献   

中国黄渤海春秋季今生颗石藻     

谨华龙  冯媛媛  李晓倩  翟惟东  孙军 《海洋学报(英文版)》2015,34(10):132-146

The living coccolithophores(LCs) are an important class of calcified taxa of phytoplankton functional groups,and major producers of marine biogenic inorganic carbon,playing an important role in the marine carbon cycle.In this study,we report the two-demensional abundance,composition of LCs and its correlation with the environmental parameters in spring and autumn,in order to understand the ecological role of LCs in the Yellow Sea and the Bohai Sea.In spring,totally 9 taxa belonging to coccolithophyceae were identified using a polarized microscope at the 1 000× magnification.The dominant species were Emiliania huxleyi,Gephyrocapsa oceanica,Helicosphaera carteri,and Calcidiscus leptoporus.The abundance of coccosphores and coccoliths ranged 0–7.72cells/m L,and 0–216.09 coccoliths/m L,with the average values of 0.21 cells/m L,and 11.36 coccoliths/m L,respectively.The Emiliania huxleyi distribution was similar to Gephyrocapsa oceanica.The highest abundance of coccoliths was observed in the east of Shandong Peninsula in northern Yellow Sea,whereas Helicosphaera carteri distributed more widely.Emiliania huxleyi and Gephyrocapsa oceanica were the two predominant species in LCs with higher abundances.The distribution of LCs was similar to that of coccoliths.In autumn,14 taxa belonging to coccolithophyceae were identified with dominant species as Emiliania huxleyi,Gephyrocapsa oceanica,Helicosphaera carteri,Calcidiscus leptoporus and Oolithotus fragilis.The abundance of coccosphores and coccoliths ranged 0–24.69 cells/m L,and 0–507.15 coccoliths/m L,with the average values of 1.47 cells/m L,and55.89 coccoliths/m L,respectively.The highest abundance of coccoliths was located in Qingdao coastal waters and south of the survey area.The distribution of LCs was similar to the coccoliths; in addition,LCs presented large abundance in the east of the central Yellow Sea area.  相似文献   

海水养殖业资源与环境的可持续发展     

宁修仁  刘诚刚  郝锵  乐凤凤 《海洋学研究》2007,25(3):75-83

概述了我国海水养殖业在快速发展过程中由于出现养殖产业规划滞后和养殖生态环境恶化而带来的若干问题。简要介绍"浙江省重点养殖海湾养殖生态和养殖容量研究"的立项背景和研究目的,鱼类、贝类和大型藻类的养殖容量研究方法以及相关的主要研究成果,展示了近海养殖生态和养殖容量的研究思路,为相关研究的进一步展开提供了一个范例。海水养殖的长远发展必须走可持续发展之路,良好的沿岸生态环境、资源与环境的和谐是支撑海水养殖业健康、持续发展的前提。总结了我国海水养殖业管理取得的进步并指出尚存在的问题。针对海水养殖业保持可持续发展的基本途径,提出了海水养殖业的规划管理和海水养殖技术改进等方面的科学建议。  相似文献   

山东黄河下游地区局部生态地球化学评价方法与技术   总被引：3，自引：0，他引：3       下载免费PDF全文

庞绪贵  战金成  宋海林  藤兆令  李秀章  王增辉  代杰瑞 《山东国土资源》2006,22(5):28-33

山东黄河下游地区局部生态地球化学评价是在多目标区域地球化学调查和区域生态地球化学评价基础上,选特色农产品产地,绿色无公害蔬菜生产基地,地方病分布区及小清河沿岸、东营油气开采污染区等局部生态地球化学环境区。按一定的方法和采样密度采集土壤、浅层地下水、土壤溶液、植物根系土、籽实、土壤生物、微生物和种子库样品,分析As,Cd等重金属元素、N,B等有益营养元素、六六六、DDT等有机物和土壤微生物类群、功能、结构多样性,研究有益营养元素、重金属元素、有毒有机污染物的分布规律、赋存状态、来源及它们在土壤、水体及生物体中的迁移、转化、累积规律与生态效应,探讨对重金属元素污染的生物修复。提出特色农产品基地布局规划建议和地方病防治、重金属污染的治理措施。  相似文献   

Rural restructuring in Hungary in the period of socio-economic transition   总被引：10，自引：0，他引：10  

Eva Kiss 《GeoJournal》2000,51(3):221-233

Rural settlements in Hungary account for 93% of all settlements and 37% of the country's population. Since 1989 they are scenes of spectacular changes. Based on some case studies of less developed villages this paper considers the most important characteristics of the post-socialist rural transformation by examining the local economy and living conditions. The main issues are how local actors (for example, economic corporations, households and individuals) have been affected by the interaction of supralocal and local factors and how they responded to them. Such responses can be considered to be manifestations of survival strategy.  相似文献