Abstract：
:The concentration of materials and energy within cities is an inevitable consequence of dense populations and their per capita requirements for food, fiber, and fuel. As the world population becomes increasingly urban over the coming decades, urban areas will dramatically affect the distribution of nutrients across the face of the planet. In many cities, technological developments and urban planning have been effective at reducing the amount of waste nitrogen that is ultimately exported to downstream surface waters, largely through investments in sanitary sewer infrastructure and wastewater treatment. There are, however, still large cities throughout the developed world that have failed to take advantage of these obvious innovations to reduce their impact on downstream ecosystems. In addition, very few cities have adequately addressed the problems of diffuse nitrogen pollution, instead city infrastructure is often designed to route this N directly into downstream ecosystems. In the developing world, many of these problems are more acute, as rapidly growing urban populations exceed the capacity of limited municipal infrastructure. Reducing urban N pollution of groundwaters and surface waters both locally and globally can only be achieved through cultural and political adaptation in addition to technological innovations. In this review, we will focus on the implications of an increasingly urban world population on local, regional, and global nitrogen cycles and propose a variety of approaches for minimizing and mitigating the impacts of urban N concentration.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Bernhardt ES,Band LE,Walsh CJ,Berke PEdoi
10.1196/annals.1439.014subject
Has Abstractpub_date
2008-01-01 00:00:00pages
61-96eissn
0077-8923issn
1749-6632pii
1134/1/61journal_volume
1134pub_type
杂志文章,评审abstract：:Studies in humans and in animal models have demonstrated that the receptor-dependent actions of 1,25-dihydroxyvitamin D are required for normal skeletal growth and maturation. Investigations were undertaken to address which consequences of vitamin D receptor deficiency are a direct result of impaired receptor-dependen...
journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
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journal_title：Annals of the New York Academy of Sciences
pub_type： 杂志文章
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更新日期：1995-05-25 00:00:00
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journal_title：Annals of the New York Academy of Sciences
pub_type： 杂志文章
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journal_title：Annals of the New York Academy of Sciences
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