Understanding the association between the non-geniculate coralline red alga Spongites discoidea and the mollusc Oxystele sinensis     

R Eager  C Puckree-Padua 《African Journal of Marine Science》2015,37(3):335-344

Nearly all adult winkles Oxystele sinensis encountered in the Kalk Bay (Western Cape province, South Africa) shallow subtidal zone were observed to bear a thick, convoluted form of the non-geniculate coralline red alga Spongites discoidea. To understand this association, various data were collected. The results show that O. sinensis is for the most part restricted to the shallow subtidal zone and rockpools, whereas the morphologically similar O. tigrina is largely restricted to the intertidal zone. Fleshy macroalgae were absent from all habitats sampled, with much of the primary substratum being occupied by encrusting algae. Spongites discoidea was restricted to intertidal rockpools and the shallow subtidal zone where O. sinensis was the most abundant winkle. Subtidal specimens of S. discoidea were generally thicker (7.24?mm [SE 0.55] on shells, 6.02?mm [SE 0.67] on boulders) than intertidal specimens (2.39?mm [SE 0.21] on boulders, 1.02?mm [SE 0.09] on bedrock), were more heavily burrowed into (44% [SE 3.32] for subtidal shells, 36% [SE 3.94] for subtidal boulders), and were more weakly attached (2.2?kg [SE 0.58] for subtidal shells, 8.4?kg [SE 0.77] for subtidal boulders). Experimental evidence showed that the coralline has no preference for shells of O. sinensis and that, contrary to our assumption, there is no apparent advantage to the winkle bearing the coralline, other than perhaps for camouflage to avoid predation. The high frequency of the association is more likely due to the substantial overlap in the niches of the coralline and the winkle.  相似文献   

Forms and sources of place attachment: Evidence from two protected areas     

《Geoforum》2014

Sense of place is a widely researched concept that has been used to describe and analyze people–place relationships. However, there is no consensus regarding the forms of place attachment, the relative importance of the sources for such attachments, or the spatial extent of place formation. The purpose of the paper is to contribute case examples of sense of place for significant natural areas, thereby adding to the body of evidence that explicates the diverse sources and forms of place attachment. Using content analysis of qualitative stakeholder interviews, we identify these dimensions of place attachment for two nationally significant Australian natural areas. Our data support a tripartite structure for sense of place comprising affective, functional and cognitive forms of attachment. We also examine the extent to which these place attachments are localized on the study sites and/or spatially generalized across sites possessing the same sources of place formation. Our case studies provide evidence for both localized and generalized senses of place. Localized place attachments had affective and functional components, respectively founded on social and biophysical sources. Generalized senses of place comprised functional and cognitive components, with appreciation of historical values of these places key to the formation of the latter. Our results indicate the spatial diversity of place attachments for protected areas and their social, cultural and biophysical sources.  相似文献   

Bacteria transport in an unsaturated porous media: incorporation of air–water interface area model into transport modelling     

Min‐Kyu Kim  Song‐Bae Kim  Seong‐Jik Park 《水文研究》2008,22(13):2370-2376

  相似文献   

“It’s a gestalt experience”: Landscape values and development pressure in Hawke’s Bay, New Zealand     

Damian Collins  Robin Kearns 《Geoforum》2010,41(3):435-446

Demand for both primary residences and second homes in high-amenity areas has led to escalating property values and widespread development pressure in coastal New Zealand. We focus on a major development proposal at Ocean Beach, a greenfield coastal site in the Hawke’s Bay region, and seek to explain the opposition it has provoked. In so doing, we address three questions: first, what landscape values are articulated within the planning process; second, what is the anticipated impact of 1000 new dwellings on those values; and third, how does place attachment figure in the ensuing debates. We address these questions though a thematic analysis of data derived from official reports and proposals, planning submissions, and key informant interviews. We find Ocean Beach to be a place that offers a quintessential coastal experience, often linked to youthful memories. Additionally, the site is valued for its accessibility and wilderness qualities - perceptions heightened by awareness that areas of undeveloped coastline relatively close to population centres are increasingly scarce. We contend that such sites are doubly valuable: in a formal sense, as natural landscapes whose processes and forms receive regulatory protection; and in an informal sense, as sites that generate human meaning, including emotions such as nostalgia, freedom and belonging.  相似文献   

Notisartikkel – Short article     

《Norsk geografisk tidsskrift. Norwegian journal of geography》2012,66(4):225-232

There is a major trend in forest management that local managers are being replaced by entrepreneurs, who are often less place-dependent. Entrepreneurs are also more updated when it comes to scientific knowledge and national and international trends in forest values and functions, as well as knowledge about general planning and management concepts that have high value for tourism and recreation. Parallel with the observed changing management culture, there also seems to be an increased abstraction of forest values and functions in forest certification programmes. The article briefly presents some key aspects of Aldo Leopold's thinking that are of relevance for forest stewardship, and discusses these in relation to main forest stewardship trends in a Nordic forestry context. In a Nordic tradition, forest management and planning are deeply rooted in local management practice carried out by official local supervisors in cooperation with forest owners and other stakeholders. Local traditions and accumulated local knowledge over time were, in addition to updated scientific knowledge, important skills for local managers. Today's post-modern forestry includes complex multi-valued forest situations on different scales, which are even more complex and challenging to manage than the more utilitarian historical forest was.  相似文献   

井群出水量减少原因分析及治理--以北京某应急备用地下水源地为例     

查恩来  张秋建 《水文地质工程地质》2005,32(2):115-117

近来,为缓解北京市日趋紧张的供水情况,需启用1995年建成的北京某应急备用地下水源地。该水源地建有30眼水井,属第四系河旁非承压含水层,当时静水位埋深为4m,单井平均出水量超过4000m3h。近年来由于各种原因,尤其是2003年该水源井出水量大幅减少的主要原因是含铁碳质化合物附着对井壁的堵塞。针对这一情况,通过试验确定了以强力正反冲洗活塞洗井工艺为核心的复合洗井方案,对17眼水井实施洗井处理,使井群出水量恢复到了建井初期的水平,取得了良好的效果。  相似文献   

Happy to Be Home: Place-Based Attachments,Family Ties,and Mobility among Rural Stayers     

Cheryl E. Morse  Jill Mudgett 《The Professional geographer》2018,70(2):261-269

Migration research has traditionally centered on tracing movement; however, the experience of staying in place has begun to capture scholarly attention. Drawing on data from an online residential decision-making survey, this article focuses specifically on the reasons that contented Vermonters cite for remaining in their home state. A statistical analysis of responses reveals the dominance of place-based factors and family ties in stayers' residential decision making. Contented stayers highly value landscape and community, as well as living near family. Biographical sketches of individual respondents show the emotional dimensions of choosing to stay, as well as the diverse forms of mobility that contented stayers exercise to remain happy at home. In its focus on stayers, this research situates itself within new geographic inquiries into place attachment and studies of “immobile” populations.  相似文献   

Alternative and Virtual Rurality: Agriculture and The Countryside as Embodied in American Imagination   总被引：1，自引：0，他引：1       下载免费PDF全文

Lisa M. Butler Harrington 《Geographical review》2018,108(2):250-273

Affection for agrarian livelihoods and rural and small‐town environments has long been held by residents in many of the world's “more developed” countries. Although the rural proportion of the U.S. population has shrunk to a minority over the last century, fondness for rurality continues to manifest itself in a number of ways. Attachment to the rural ideal or rural idyll can be considered as attachment to the idea of a type of place, rather than specific place attachment. Based on literature, field observation, computer searches, and data from the U.S. Census of Agriculture, connections to idea(l)s of rurality apparent in popular culture are identified and illustrated. These include rural and agricultural tourism, small‐scale farming and large‐lot rural subdivisions, urban agriculture, farmers’ markets and community‐supported agriculture, creation of housing developments around farm activities, and rural‐named housing and business developments. Idealized relationships with rurality call upon health and well‐being, connecting to nature, aesthetics, privacy, and respect and nostalgia for rural livelihoods.  相似文献   

环境伦理观与可持续旅游行为研究进展   总被引：1，自引：1，他引：0  

徐菲菲  何云梦 《地理科学进展》2016,35(6):724-736

环境伦理观是促进人与环境和谐发展的核心理念,对可持续旅游行为具有积极的指导作用。本文通过对中英文主流数据库期刊的文献回顾,对环境伦理观的理论内涵、影响因素以及环境伦理观对可持续旅游行为的影响进行系统梳理。结果表明：环境伦理观的概念体系主要包括环境道德、环境情感和环境信念三要素。现有研究往往不区分环境道德和环境信念,对环境情感的度量往往缺乏统一标准,导致研究结果不一致。对环境伦理观具有直接影响力的是价值观理论,社会文化因素、宗教因素、教育水平、媒体和广告影响、政策、国内和国际移民经历等因素也有一定的作用。西方对环境伦理观与可持续旅游行为进行了大量的定性和定量研究,而国内以概念性研究居多,既有研究中往往仅关注旅游中的环境行为,对可持续旅游行为关注较少,缺乏对这一特定行为的概念界定,因此,未来应在以下几个方面加强研究：①对环境伦理观理论内涵的度量;②对环境伦理观影响因素的研究;③对可持续旅游行为的界定和度量;④文化因素对于环境伦理观和可持续旅游行为的影响;⑤运用定量和定性研究方法探求环境伦理观对可持续旅游行为的作用机理和影响,为促进生态文明建设提供理论支撑和实证研究。  相似文献   

旅游者生态价值观对其环境责任行为的影响——以岳麓山风景区为例     

段正梁  彭振  贺小荣 《地域研究与开发》2021,40(1):132-137,167

依据自我决定理论,构建以自我决定动机为中介变量、地方依恋为调节变量的调节中介模型,旨在从心理动机层面探讨旅游者生态价值观影响其环境责任行为的作用机制和边界条件。研究发现:生态价值观对内部和外部动机均有显著正向影响,并通过内部和外部动机进一步正向影响旅游者环境责任行为;地方依恋对生态价值观与内部动机之间的关系有显著正向调节作用。在制定景区生态环境保护和可持续发展策略时,应考虑利用旅游者生态价值观、地方依恋和自我决定动机的多层作用关系,以激发旅游者环境责任行为。  相似文献