| 书目名称 | Monitoring Ecological Condition in the Western United States | | 编辑 | Shabeg S. Sandhu,Brian D. Melzian,Barbara T. Walto | | 视频video | | | 图书封面 |  | | 描述 | The monitoring of point sources by the Environmental Protection Agency (EPA), the states, and the tribes has documented and helped reduce the levels of chemical stressors affecting our ecosystems. With the controls on point sources reducing chemical contamination, new environmental challenges associated with nonpoint sources have emerged. To adequately deal with these new problems, EPA‘s Office of Research and Development recognized the need to develop an overall under standing of the condition of our ecological resources, the trends in their condition, and the stressors affecting these systems on a broad scale. Toward this end, the En vironmental Monitoring and Assessment Program (EMAP) was established by EPA and has been strategically developing the scientific tools and techniques to monitor and assess the status and trends of aquatic ecosystems. EMAP scientists have developed new indicators and probability-based de signs to fill data gaps in the development of regional-scale assessments of our aquatic resources, as required in the Clean Water Act. We have a scientifically de fensible approach that allows: 100 percent coverage of the aquatic resources within broad geographic | | 出版日期 | Book 2000 | | 关键词 | USA; development; ecosystem; environment; environmental monitoring; environmental protection; natural reso | | 版次 | 1 | | doi | https://doi.org/10.1007/978-94-011-4343-1 | | isbn_softcover | 978-94-010-5870-4 | | isbn_ebook | 978-94-011-4343-1 | | copyright | Kluwer Academic Publishers 2000 |
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发表于 2025-3-21 19:23:37
