民族旅游地居民文化原真性感知对地方依恋的影响——以湖北省恩施土家族苗族自治州为例     

余意峰  徐曼玉  赵欣 《地域研究与开发》2017,36(2)

从旅游地居民视角出发,选取湖北恩施土家族苗族自治州为调研地,通过问卷调查和结构方程模型分析方法,探讨民族旅游地当地居民文化原真性感知与地方依恋之间的关系。研究表明:文化原真性是民族旅游地居民地方依恋的重要影响因素;地方依恋由地方依赖与地方认同两个维度构成,地方依赖是地方认同的前因变量;居民文化原真性感知对地方依赖与地方认同均产生直接影响,其中对地方依赖的直接影响更显著,对地方认同的影响主要是通过地方依赖间接产生。提升民族旅游地居民文化原真性感知水平有利于建构居民地方依赖和地方认同。  相似文献   

Resistance to relocation in flood-vulnerable coastal areas: a proposed composite index     

Hélène Rey-Valette  Samuel Robert 《Climate Policy》2019,19(2):206-218

The increasing number of coastal floods in recent years in France has resulted in the design of new adaptation principles for the most endangered coastal areas. The aim of the government is to reduce the vulnerability of these areas by relocating property and infrastructure. These measures have, however, come up against considerable opposition from the population concerned. Using a survey of 421 inhabitants of Hyères, a coastal town in the South of France, this article proposes the study of resistance to relocation through the creation of an index for resistance that incorporates attachment to place, residential mobility and risk perception. The results show a correlation for the index and distance from the sea that highlights the existence of conflicting interests with adaptation measures depending upon population categories.

Key policy insights

• In France, although coastal flooding risk is a key issue in numerous populated coastal areas, coastal dwellers show little willingness to relocate.

• Resistance to relocation can be assessed through a composite index integrating place attachment, residential mobility and risk perception.

• Application of such an index shows a correlation between willingness to relocate and distance from the sea.

• Conflicts of interest with adaptation measures also depend on the age of the dwellers, their standard of living and on home ownership.

  相似文献   

Nonculturability of the pathogenic Vibrio parahaemolyticus in live culture of Grateloupia turuturu is associated with bacterial attachment to the algal thalli     

LIU Feng  PANG Shaojun 《海洋学报(英文版)》2010,29(6):92-103

The invasive red alga Grateloupia turuturu Yamada could turn Vibrio parahaemolyticus into nonculturable state in live algal culture. In order to elucidate the mechanism of such an effect, a series of culture experiments were performed in this investigation based on three hypothesized causes, namely bacterial attachment, production of reactive oxygen species (ROS) and the discharge of water soluble secondary metabolic compounds. The results reveal that attachment to the thallus surface of G. turuturu was the major reason for the decrease of V. parahaemolyticus in seawater. Further investigations show that V. parahaemolyticus attachment to the surface of algal thallus in live cultures of seaweeds was a common phenomenon. However, the disappearance of the culturability of V. parahaemolyticus occurred only on the thallus of G. turuturu over 72 h among all six algal species tested. Electron microscopic scanning shows that most of V. parahaemolyticus attached to G. turuturu changed from the initial normal bacilli to coccoid-shape after 72 h. The enclosure experiments by enclosing the algal thallus in tubes demonstrate that the nonculturability of V. parahaemolyticus in the water of live culture of G. turuturu occurred after the physical contact of the V. parahaemolyticus to the alga. The capacity of G. turuturu in affecting the culturability of V. parahaemolyticus was not influenced after inhibition of photosynthesis by treatment of 3''-(3,4-dichlorophenyl)-1'',1''-dimethyl urea (DCMU) at non-lethal levels. Production of reactive oxygen species after addition of live culture of bacteria was excluded by on-line analyzing the oxidation of dichlorohydrofluorescein (DCFH) to dichlorofluorescein (DCF) in the presence of peroxidase on a VersaFluor fluorometer.  相似文献   

金属离子和神经递质对多室草苔虫幼虫附着的影响     

于秀娟  严岩  顾继东 《热带海洋学报》2007,26(4):43-50

研究了4种离子(K 、Ca2 、Mg2 、NH4 )和五种神经递质(r-氨基丁酸,缩写为GABA、乙酰胆碱、L-多巴、多巴胺、5-羟色胺)不同浓度溶液对多室草苔虫Bugula neritina幼虫附着的影响。结果表明,10—70mmol.L-1的K 和高于10mmol.L-1的NH4 均有效地诱导幼虫附着在培养皿底部,而1—50mmol.L-1的Mg2 则明显延长幼虫的浮游时间并抑制幼虫的最终附着。Ca2 对幼虫的附着没有明显的影响。10-2mol.L-1的GABA可以诱导幼虫附着,但低于该浓度则没有明显的作用。乙酰胆碱(10-2—10-3mol.L-1)、L-多巴(10-3—10-5mol.L-1)和多巴胺(10-3—10-4mol.L-1)均诱导幼虫的附着行为,但是却不能诱导幼虫的最终附着,这可能是由于这些物质限制了幼虫的活动能力,进而降低了其在探索过程中寻找到合适基质的机率。10-3—10-5mol.L-1的5-羟色胺通过强迫幼虫维持浮游而抑制幼虫的最终附着,据此推测5-羟色胺及其衍生物应用于开发无毒型的防污漆会有良好的前景。该研究为进一步研究苔藓虫幼虫的附着机制以及开发无毒环境友好型防污物质或是人工养殖苔藓虫提供了科学依据。  相似文献   

中国城市网络中心性的影响因素及形成机理——基于上市公司500强企业网络视角   总被引：3，自引：3，他引：3  

盛科荣  杨雨  孙威 《地理科学进展》2019,38(2):248-258

利用2016年中国上市公司500强企业网络数据和隶属联系模型构建中国城市网络,在解析城市网络中心性结构特征的基础上,定量识别与测度了中国城市网络中心性空间分异的影响因素,在“行为—结构—绩效”分析框架下探索性解析了城市网络中心性的形成机理。研究发现：城市出度中心性体系呈现“香港-北京”双核结构特征,中介度体系呈现以北京为首位城市的首位分布特征,入度中心性体系则呈现多核心结构特征;市场潜力、关键资源、区位条件和经营环境等城市属性特征对于城市网络中心性具有显著正向影响,不同维度中心性特征对于不同类型影响因素的敏感性存在差异;择优选择、偏好依附和网络邻近是中国城市网络中心性发育的动力机制,这将进一步强化具有传统优势城市的网络地位。在网络发展环境下,中国城市化政策和城市治理体系需要作出相应调整,中国政府必须积极应对网络环境下的城市间发展差距,并在更大空间尺度上推动城市之间的网络合作。  相似文献   

Zoospores of Undaria pinnatifida: their efficiency to attach under different water velocities and conjugation behavior during attachment     

PANG Shaojun  SHAN Tifeng 《海洋学报(英文版)》2008,27(6):94-101

In the invading course of Undaria pinnatifida, zoospore attachment in a dynamically changed subtidal water environment is crucial for the establishment of a potential population in alien waters. Among many abiotic factors that may interfere with the attachment process, water velocity is the most important one. In this investigation, the effect of water velocity on zoospore attachment of U. pinnatifida was investigated in an artificially designed system. It was found that freshly released zoospores that were transported by water flowing at 0 -16 cm/s showed no difficulty in attaching the smooth surface. Zoospore attachment decreased at elevated water flowing rates. At 70 cm/s no spore attachment occurred. Spores that have settled on glass slide for up to 1 h could not be stripped away by flowing water at a rate of 129 cm/s, the same was true of the 20 d old filamentous gametophytes. It was found that more than 70% of free-swimming zoospores tended to settle down adjacent to the settled spores and formed conjugated clusters from two up to a few hundred cells in still culture.  相似文献   

藤壶黏附研究进展     

陈新  唐敏  刘秋妤  卓文  李紫薇 《海洋科学》2017,41(7):150-156

藤壶是最常见的海洋污损动物,也是材料防污性能检测和评价试验中最主要的动物模型。藤壶附着从腺介幼虫探索适宜基底开始,到随后分泌藤壶胶进行固着,期间受自身及多种环境因子的影响。本文从藤壶腺介幼虫的黏附行为、影响黏附的因素和藤壶胶的特性3个方面出发,综述了近年来在藤壶黏附领域的研究进展,期望为新型防污产品的研发和检测评价提供较系统的参考资料。  相似文献   

老年人的休闲涉入与地方依恋——基于广州城市公园的实证研究     

谢涤湘  谢晓亮  兰妍  吴淑琪  周勇坚  常江 《地理科学》2022,42(4):692-701

在广州市7个城市公园收集423份有效问卷,基于吸引力、中心性、自我表现、地方依赖和地方认同等核心概念,构建老年人休闲涉入与地方依恋之间关系的模型。通过验证性因子分析和路径分析,探讨老年人休闲涉入对公园地方依恋的影响关系路径及影响机制。研究发现,休闲涉入的吸引力维度对地方依赖产生了显著的正向影响,自我表现维度正向显著影响地方认同,中心性维度正向显著影响地方依赖和地方认同。验证了休闲涉入与地方依恋之间总体上存在正相关,并将该结论拓展到老年人群体和公园休闲情境中。此外,探讨城市公园中老年人休闲涉入对地方依恋的影响机制,以期在人口老龄化的背景下,为提高老年人的地方依恋提供理论参考和实践建议。  相似文献   

城市居民休闲的地方依恋研究——以广州荔枝湾为例   总被引：1，自引：0，他引：1  

王华  严婷 《地域研究与开发》2014,(5)

以广州荔枝湾为例,城市居民对休闲空间的地方依恋可分为地方依赖和地方认同两个维度,其中,地方认同即情感性依恋强于地方依赖即功能性依恋。城市居民对休闲空间的地方依恋及地方认同、地方依赖的程度随休闲距离的增加而衰减,随年龄的增长而增强,随教育程度的提高而减弱,同时,还受到闲暇时间的影响,但并不受收入水平的影响。依据休闲活动的地方依赖度和地方认同度差异,可将城市居民划分为功能需求型、地方冷淡型、地方依恋型和情感认同型4类休闲群体。  相似文献   

不同附着基质对长茎葡萄蕨藻生长及附着效果的影响     

陈海昇  刘东超  王晓梁  陈柏安  徐聪 《广东海洋大学学报》2021,(1)

【目的】探索不同附着基质对长茎葡萄蕨藻(Caulerpalentillifera)直立枝生长及藻体附着效果的影响。【方法】对长茎葡萄蕨藻直立枝以垂直砂埋、水平砂埋、塑料网网夹、尼龙网网夹及无附着基质(对照组)五种附着方式进行实验,探究长茎葡萄蕨藻直立枝的生长、附着能力、光合特性参数及营养含量的变化。【结果】垂直砂埋处理下,藻体的新生直立枝质量、质量长度比及球状小枝的直径与其他各组相比最优(P <0.05),分别是0.313 3 g、0.086 6 g/mm和1.67 mm,是对照组的7.38、9.62、1.67倍;水平砂埋与对照组相比,藻体附着能力有显著增强(P <0.05),假根数为26,长度为30.77 mm及假根附着砂砾质量为0.566 0 g;除对照组外,各组最大光能转化效率(Fv/Fm)和实际光化学效率Y(II)值呈先下降后上升趋势,24 h后垂直沙埋藻体Fv/Fm和Y(II)最快恢复原始水平,为0.856μmol·m~(-2)·s~(-1)和0.851μmol·m~(-2)·s~(-1),显著高于其余组(P <0.05);垂直砂埋与水平砂埋处理后的藻体,其可溶性糖含量分别比对照组显著降低34.24%和33.93%(P<0.05),而网夹处理后,没有显著差异(P> 0.05)。垂直砂埋处理对藻体总蛋白含量增加有显著促进作用,是对照组的1.26倍(P <0.05)。【结论】长茎葡萄蕨藻直立枝以垂直砂埋附着方式生长最佳,以水平砂埋附着方式附着更牢固。  相似文献