Publication History View all

  • [Show abstract] [Hide abstract]
    ABSTRACT: This study investigated seedling emergence in field sowings in terms of rate, and maximum seedling emergence, for twenty one species of forb, grass and geophyte species associated with montane South African grassland communities. Species were sown in early and late spring to compare the effect of sowing date on emergence characteristics and subsequent growth. RGR and mean individual standing biomass were calculated for a 150 day post sowing growth window. Species showed highly significant differences in the time taken to achieve 50% emergence, and species rankings on this basis changed according to the date of sowing. There were large differences in RGR between species that were also reflected in mean standing biomass per individual. The data provide a basis for a preliminary, comparative ecological characterization of these species and an insight into how these species establish and potentially avoid competitive elimination in mixed sowings in restoration ecology or in landscape architecture, in the first growing season. The study also provides some indication on how emergence and growth of individual species might affect recruitment and survival in their habitats.
    South African Journal of Botany 09/2013; 88:28–35. DOI:10.1016/j.sajb.2013.04.008
  • [Show abstract] [Hide abstract]
    ABSTRACT: There has long been a focus in urban landscape planning and design on the creation of highquality public spaces, or place-making. Large amounts of capital continue to be spent on creating such spaces without adequate thought or resources for their long-term maintenance and management of public spaces, or place-keeping.While there may be continued policy rhetoric about the importance of place-keeping, particularly as public spaces are recognised for their important contribution to health, wellbeing, biodiversity and also their economic value, this has not however been supported in practice. There are examples in many cities where public spaces are subject to poor management and maintenance practices. This is clearly visible where vandalism, litter and damage to facilities and equipment occur, and people no longer feel safe or comfortable.This paper argues that this uneven focus on place-keeping is not only due to a lack of resources but also a lack of understanding of the concept, its complexity and the wide implications it has for users, practitioners and policymakers. The paper aims to address this gap in knowledge by providing a detailed exploration and definition of place-keeping within the urban context. Place-keeping is not simply about the physical environment, its design and maintenance, but also encompasses the interrelated and non-physical dimensions of partnerships, governance, funding, policy and evaluation.
    Urban Forestry & Urban Greening 01/2011; 11(1). DOI:10.1016/j.ufug.2011.09.005
  • [Show abstract] [Hide abstract]
    ABSTRACT: Results generated by planning and futures studies are often too abstract to provide a clear vision of the future to non-specialists. In this study the role of D visualization and the challenges in developing and communicating visible visions for our future landscapes is explored. While traditional visualization techniques have been well-known for several hundreds of years digital 3D visualizations are still not yet taken advantage of in long-term planning or in futures studies in general to their full potential. As part of an iterative consultation and participation process a long-term vision for the landscape and land management of the Alport Valley in the Peak District National Park, UK is developed in order to improve the valley's special landscape character, to enhance the valley's visual and recreational attractiveness, to regenerate the woodlands in ways that maximize the long-term benefit of ecology, wildlife and landscape and to get a good balance between wooded areas and open moorland.An early integration of D visualization in the planning process offers a wide range of opportunities for exploring alternative futures but it also poses challenges to the expert planners such as being able to react timely, with a high degree of realism and interactively to incorporate new inputs from participating stakeholders. Furthermore, the planner is forced to translate a vision into concrete geographically referenced data. Only then the vision can be visualized. The full potential of 3D visualizations in the planning disciplines and in futures studies is still to be explored. The visualizations could be the basis to communicate the vision – the views of the future – and to share the vision with others in order to influence future change.
    Futures 09/2010; 42(7):693-699. DOI:10.1016/j.futures.2010.04.006
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Along with the strong movement towards sustainable urban environments, there is an increasing use of green roof systems, including the semi-extensive green roofs, which are composed of lightweight layers of free-draining material that support low-growing, tough, and drought-resistant vegetation. Various kinds of green roof systems are also used at street levels, on the top of underground car parks, for example. To predict the sound fields in street canyons, it is important to demonstrate the acoustic effect of such green roof systems, especially considering diffracted sound waves. In this study, therefore, a series of measurements of sound pressure level were carried out in a semi-anechoic chamber using 20 green roof trays which consist of the Zinco substrate with a depth of 100mm and low-growing vegetation. To consider a low-profiled structure in urban areas, a box with a height of 1200mm was located on the ground, and the trays were installed on the top of the box. As experimental parameters to verify the effects of the green roof system on noise abatement for diffracted sound waves, the structure, area and position of the green roof system, and the type of vegetation were considered. The experimental results demonstrate that the green roof system at street levels can be effectively used to mitigate noise in urban spaces for diffracted sound waves.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The designation of tracts of land for nature and landscape conservation has been a mainstay of countryside policy. However, its continued relevance in the light of policy trends towards sectoral and spatial integration has been questioned. Focusing principally on experience in the United Kingdom, this review considers the impact and effectiveness of designations from a number of perspectives. It concludes that, whilst on balance they remain broadly fit for purpose and good value for money, they will increasingly need to be embedded in land use strategies which are more responsive to changing social needs and environmental conditions.
    Land Use Policy 12/2009; 26(26). DOI:10.1016/j.landusepol.2009.08.005
  • [Show abstract] [Hide abstract]
    ABSTRACT: We investigated the influence of fungivorous soil invertebrates on seedling emergence from soil mesocosms buried in a ruderal grassland. Two out of three tested plant species, Centaurea nigra and Origanum vulgare, had a higher seedling emergence when we added the fungivorous collembolan Protaphorura fimata to mesocosms, compared to a control treatment where we excluded soil mesofauna by using defaunated soil and preventing re-colonization from the ambient soil. P. fimata increased seedling emergence to a similar extent as a treatment of the seeds with the fungicide Aathiram. In contrast, a treatment designed to allow re-colonization of defaunated soil from the ambient soil did not result in increased seedling emergence compared to the control treatment. In a third plant species, Anthriscus sylvestris, overall seedling emergence was too low for any significant treatment effects to be detected. This study corroborates the findings of a previous experiment carried out in the laboratory to explore the influence of P. fimata on seed mortality under controlled environmental conditions and shows that there are similar effects on seedling emergence under field climatic conditions.
    Journal of the Torrey Botanical Society 01/2009; 135(Apr 2008):272-280. DOI:10.3159/08-RA-022.1
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper seeks to enhance understandings of underlying reasons for attitudes towards a recent landscape phenomenon— mobile telecommunications development— in a protected area. A public questionnaire survey was conducted, using photographs of mobile telecommunications development installed in the Peak District National Park, England. Building on existing theories about landscape perceptions and environmental values, the study examined the factors influencing the acceptability of such development: a) the degree of human influence in landscape; b) the purpose of development; and c) environmental values. The study highlights the fundamental influence of environmental values on people's attitudes towards incremental landscape change. The paper discusses the implications of people's generally high level of sensitivity to landscape change in a protected area and the predominance of ecocentric values for landscape planning and management.
    Landscape Research 09/2008; 33(5):587-604. DOI:10.1080/01426390801948398
  • [Show abstract] [Hide abstract]
    ABSTRACT: This article reviews one important aspect of children's environments in urban areas: play in public open spaces. The focus is on the provision of spaces for play for children aged between about 4–11 years old. The article argues that children's play is important for their development and for society as a whole and the article includes a short introduction to this, drawing on literature from a range of disciplines. The article then moves on to discuss aspects of the history of playgrounds during the 19th and 20th centuries, both in America and England. The article continues to draw on a range of literature while discussing play in public open spaces with respect to play value and need; design concepts and themes and design elements. The article concludes by contemplating whether the design of play in public open spaces will in the future draw more on the conclusions from academic literature than has happened during the last 40 years.
    Geography Compass 02/2008; 2(2):495 - 512. DOI:10.1111/j.1749-8198.2008.00077.x
  • Plant User Handbook: A Guide to Effective Specifying, 01/2008: pages 221 - 244; , ISBN: 9780470757208
  • Plant User Handbook: A Guide to Effective Specifying, 01/2008: pages 74 - 88; , ISBN: 9780470757208
Information provided on this web page is aggregated encyclopedic and bibliographical information relating to the named institution. Information provided is not approved by the institution itself. The institution’s logo (and/or other graphical identification, such as a coat of arms) is used only to identify the institution in a nominal way. Under certain jurisdictions it may be property of the institution.
View all

Top publications last week by reads

Sustainable Development 09/2011; 19(5):289 - 300. DOI:10.1002/sd.417
60 Reads
Urban Design and Planning 01/2008; 161(3):105-114. DOI:10.1680/udap.2008.161.3.105
7 Reads