Assessment of nitrogen deposition effects and empirical critical loads of nitrogen for ecoregions of the United States
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Contributions
- United States. Forest Service. Northern Research Station - Contributor
Publication
2011 - U.S. Dept. of Agriculture, Forest Service, Northern Research Station, Newtown Square, PA, Pennsylvania
Language
English
Word Count
72,750 words, Guess
Page Count
291 pages
Identifiers
- Library of Congress Control Number2011451262
- OCLC Control Number758387636
- Open LibraryOL30628921M
Classifications
- DDC553/.930973
- LCCTD196.N55 A77 2011
Description
This report synthesizes current research relating atmospheric nitrogen (N) deposition to effects on terrestrial and aquatic ecosystems in the United States and to identify empirical critical loads for atmospheric N deposition. The report evaluates the following receptors: freshwater diatoms, mycorrhizal fungi and other soil microbes, lichens, herbaceous plants, shrubs, and trees. The main responses reported fell into two categories: (1) biogeochemical; and (2) individual species, population, and community responses. The range of critical loads for nutrient N reported for U.S. ecoregions, inland surface waters, and freshwater wetlands is presented. This range spans the range of N deposition observed over most of the country. The empirical critical loads for N tend to increase in the following sequence for four different life forms: diatoms, lichens and bryophytes, mycorrhizal fungi, herbaceous plants, shrubs, trees.
Subjects
Series Statement
- General technical report NRS -- 80
Links
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