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Castro-Castellon Ana Teresa Hughes Jocelyne Mary Rose Read Daniel Steven Azimi Yaldah Chipps Michael James Hankins Nicholas Peter 《Environmental science and pollution research international》2021,28(22):27731-27741
Environmental Science and Pollution Research - A continuous flow filtration system was designed to identify and quantify the removal mechanisms of Cyanobacteria (Microcystis aeruginosa) by... 相似文献
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Academic understandings of environmental discourses are primarily based on global and national accounts, despite widespread acceptance of the local as an essential site of environmental action. Local water issues have been studied in a number of ways, including interviews and ethnographies that show the impacts of water scarcity, examine the role of mediating technologies, and provide diverse perspectives on governance. An overarching impression of key narratives and concerns at local scales, however, is lacking. In this paper, we examine water coverage in The Sowetan, a South African newspaper known for its distinctive voice, as a (albeit imperfect) proxy for local discourse. We identify key themes, location and scale, trigger events, actors, authors, and provide initial insights into the problem frames used in these texts. Our findings show distinct differences from the results of environmental media analyses at other scales, including strong individual citizen voices, emphasis on the politics of water, and rare use of language that accords with global environmental discourses; this also differs from results based on interviews and ethnographies at the local scale. Our findings raise important questions about the resonance of global discourse with local views and practices and how local discourses are produced, and suggest a need to more carefully examine the myriad ways of talking about justice and the environment at different scales and through different methodologies. 相似文献
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David R. Breininger Mary Jo Barkaszi Rebecca B. Smith Donna M. Oddy Jane A. Provancha 《Environmental management》1998,22(2):315-321
/ We identified and ranked 108 resident and migratory wildlife taxa on John F. Kennedy Space Center (KSC) that were vulnerable to local, regional, or global extinction. We ranked taxa based on their vulnerability to extinction, their potential role for maintaining faunal integrity, and the relevance of KSC for maintaining their populations in the United States and Florida. Several taxa, not listed by agencies, were vulnerable to regional or global extinction. Many taxa not vulnerable to global extinction were vulnerable to local and regional extinction. Top predators were vulnerable to extinction because of small population size, isolation from other populations, and road mortality. Many taxa were dependent on habitat conditions at different geographic locations so that conservation required greater collaboration among land owners, managers, and researchers at local, regional, and global scales.KEY WORDS: Biological diversity; Endangered species; Conservation 相似文献
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Mary C. Towner 《Behavioral ecology and sociobiology》1999,46(2):82-94
This paper presents a dynamic state variable model that examines human dispersal in a land-based economy. In humans, like
other animals, many individuals disperse during their lifetimes, with extensive variability in the timing and likelihood of
dispersal by individuals of different states. The model places human and non-human dispersal in a common framework, specifically
by utilizing a cost-benefit approach. As with other animals, individual access to resources likely plays an important role
in shaping human dispersal, and the model explores the mechanisms underlying this relationship. Over a series of time steps,
individuals must decide whether to stay in their natal area or disperse, given their states (wealth, marital, and inheritance
status) and the environmental constraints on dispersal. Costs of dispersal include time and an initial drop in wealth, while
the benefit is the potential of the dispersal area to increase wealth. The model determines whether dispersing or staying
results in the highest fitness, where fitness is a function of individual wealth and years married. The model shows that dispersal
is favorable under a wide range of environmental conditions, but that it also varies predictably according to individual states.
Men of middle wealth values disperse under a wider variety of circumstances than poorer or wealthier men. Wealthy men, who
are particularly sensitive to the time cost and mortality risk associated with dispersing, appear to adopt a more conservative
dispersal strategy than poorer men, who are more sensitive to the wealth cost and wealth growth rate associated with dispersing.
Dispersal behavior is also contingent on its effects on an individual's probability of marrying or inheriting wealth. Finally,
the model fosters an examination of how the interaction of life events, and their directions of causation, can be studied.
Received: 6 May 1998 / Received in revised form: 3 February 1999 / Accepted: 7 February 1999 相似文献
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