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101.
The River Murray in Australia drains an area of one million square kilometres, but in 1981 the mouth closed for some weeks. It is important that this be prevented, as the environmental consequences of permanent closure are severe. The size of the mouth is influenced by wind and wave activity at the mouth, and by the river flow, which is controlled by a system of weirs and barrages. We have been able to demonstrate using recursive estimation techniques that river flow is the most important explanatory variable for mouth size, so that the proper management of flow alone has the potential to prevent future closures. 相似文献
102.
Bob Evans Marko Joas Susan Sundback 《Journal of Environmental Planning and Management》2006,49(6):849-867
This paper draws upon the DISCUS (Developing Institutional and Social Capacity for Sustainable Development) research project, co-funded by the European Commission. The project was undertaken during 2001 – 2004 and involved an in-depth study of 40 European towns and cities in order to understand the institutional and social factors and conditions that might contribute to policy ‘achievement' or ‘failure' in local sustainable development policy and practice. Based on the findings of this research it proposes a conceptual framework for local sustainable development, linking the concepts of institutional capital, social capital and governance to provide a model for understanding the governing of local sustainability. The research shows that in those cases that exhibit sustainable development policy achievements, there are also greater levels of civil society activity and knowledge regarding sustainability issues, and high levels of institutional capacity. Confident local government is crucial to the development of institutional capacity and to institutional learning. One aspect of this is local authorities being equipped to address the longer-term issues and to have a strategic vision for a sustainable future. 相似文献
103.
Bob?B.?M.?WongEmail author Michael?D.?Jennions J.?Scott?Keogh 《Behavioral ecology and sociobiology》2004,56(3):253-256
Mate choice is not just a female preoccupation. Under some circumstances, males may also be choosy. However, studies of male mate choice have generally been confined to situations where males can make direct comparisons between potential partners. In contrast, sequential male mate choice has largely been overlooked despite its biologically importance, especially if current investment in mate attraction diminishes a males future mating opportunities. Using the Pacific blue-eye fish Pseudomugil signifer, we show that males are capable of exercising sequential mate choice. When presented sequentially with large and small females, males spent more effort courting the former. However, males did not appear to modify the time spent courting a given female based on the size of the female encountered previously. We suggest that greater attention to the sequential choice problem in males may help illuminate similarities and differences between the sexes when it comes to mating decisions.Communicated by T. Czeschlik 相似文献
104.
Bob Crabtree Philip Leat John Santarossa 《Journal of Environmental Planning and Management》1993,36(2):187-198
This paper identifies criteria for efficient public utilization of designated wildlife sites. It describes a survey of the major wildlife sites in Scotland in order to determine the site management objectives and extent to which sites are utilized by visitors. Substantial differences were found to exist between organizations as regards site management objectives, promotion and the provision of visitor facilities. Explanations for the apparent variability in efficiency of site utilization are discussed in terms of organization ideology, funding and structure. It is argued that trusts funded through membership may be best able to reconcile the benefits from current site utilization with the conservation of long‐term use and existence values. 相似文献
105.
Bob Ferrone 《环境质量管理》1996,5(4):41-46
At the end of the 20th century, business finds itself in a period of transformation and a new emphasis on environmentally responsible practices. Leading-edge companies are now integrating environmental concerns into everyday business activities. Competitive issues, which led to the formation of just-in-time production processes, are now forcing companies to better understand their effects on the environment. Business leaders must now look at environmental issues as opportunities, not burdens. With innovative use of “industrial ecology,” companies can set the stage for long-term growth into the next century. “Business men go down with their businesses because they like the old way so well they cannot bring themselves to change.” Henry Ford. 相似文献
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