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971.
Atmospheric fall-out of metals around the Murano glass-making district (Venice,Italy) 总被引:1,自引:0,他引:1
Paolo Rossini Gabriele Matteucci Stefano Guerzoni 《Environmental science and pollution research international》2010,17(1):40-48
Background, aim and scope
Murano’s glass-makers have held a monopoly on quality glass-making for centuries known all over the world. Artistic glass manufacture entails exposure to complex mixtures of pollutants, including metals. A few studies have reported high levels of trace elements in marine waters, sediments and mussels around Murano and shown that emissions from Murano glass-making workshops significantly influence air quality in the Venice area. Nevertheless, to date, there is very little information on atmospheric concentrations and virtually none on atmospheric deposition fluxes of trace elements around the island. This study presents data on the distribution of trace elements in the air and atmospheric depositions around Murano, based on a 2-year sampling period. 相似文献972.
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Robert L. Ryan Donna L. Erickson Raymond De Young 《Journal of Environmental Planning and Management》2003,46(1):19-37
In the agricultural Mid-west, riparian corridors are vital for protecting biodiversity and water quality. The cumulative management decisions of hundreds of private landowners have a tremendous impact on this riparian zone. This study of 268 farmers in a typical Mid-western watershed in Michigan looked at farmer's motivations for adopting conservation practices, their current management practices along their rivers and drains as well as their future management plans. The results of the study showed that farmers are intrinsically motivated to practise conservation by such factors as their attachment to their land, rather than by motivations such as receiving economic compensation. Farmers are also likely to engage in conservation practices that make their farm appear well-managed. Furthermore, those farmers with strong intrinsic motivations were likely to adopt conservation practices that protect streams, such as maintaining a woody vegetative buffer or practicing no-till farming. This study shows that protecting riparian resources in agricultural watersheds requires strategies for conservation that respect farmers' attachment to their land and their desire to practise good stewardship. 相似文献
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Adélia De Melo Branco João Suassuna Semira Adler Vainsencher 《Mitigation and Adaptation Strategies for Global Change》2005,10(3):393-409
This paper focuses on the importance of rainwater harvesting to mitigate the scarcity of water in the semi-arid region of
Brazil. It is a case study about the Million Cisterns Project, an initiative developed by NGOs with the support of Brazilian
Federal Government Institutions and international funding organizations. The project is innovative in a series of ways when
compared to mitigation measures previously implemented by the government. Instead of focussing on short-term, top-down, palliative
measures based on the construction of dams and wells, it focuses on low cost, bottom-up, long-term measures and, most importantly,
it involves an educational component. Thus, the provision of water is closely related to the empowerment of the most destitute
population and this leads to the sustainability of the actions. The case study serves to illustrate the relevance of the partnership
between grassroots organizations and governmental institutions in the context of mitigation. 相似文献
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Abstract: Studies of species diversity, macroecology, and conservation are usually based on lists of species, but lists found in the scientific literature vary in completeness. The use of such data sets can produce misleading results, making it necessary to test species lists for completeness before undertaking an analysis. Species-richness estimators are useful for judging the completeness of species lists but have limitations. To add rigor to studies based on species lists, we propose that species lists should test for " omnipresent" taxa—species, genera, and families that occur throughout the region concerned—and for a minimum number of species and families. As a case study, we compared species assemblages in diverse habitats in Mexico and found that seven families and two genera of land birds are omnipresent in mainland Mexico (excluding treeless areas) and that the most depauperate assemblage known contains 35 species from 21 families. We concluded that a list of land birds from Mexico that lacks any of these omnipresent taxa or that contains fewer than 35 species or 21 families is incomplete. Similar analyses can be done for other taxa and other parts of the world. Tests for omnipresent taxa and for a minimum number of species and families can be used in combination with other existing criteria, such as species-richness functions, to better evaluate the completeness of species lists. Realistic results may be produced in macroecological and conservation studies only if they are based on reasonably complete species lists. 相似文献
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