| 書目名稱 | New Perspectives on Nitrogen Cycling in the Temperate and Tropical Americas | | 副標(biāo)題 | Report of the Intern | | 編輯 | Alan R. Townsend | | 視頻video | http://file.papertrans.cn/666/665634/665634.mp4 | | 圖書封面 |  | | 描述 | Inputs of nitrogen to terrestrial and aquatic ecosystems have increased several-fold over the last one hundred and fifty years, with the steepest increases during the last four decades. The expansion of fertilizer manu- facture and use, the increase in fossil fuel combustion, the intensification of animal husbandry, and widespread cultivation of N2 fixing crops have all contributed to the dramatic increase in N inputs. The increase has been most rapid in Northern Hemisphere (NH) temperate ecosystems, but presently subtropical and tropical regions of Asia are also experiencing an explosive increase in N inputs to terrestrial ecosystems (W. Chameides, pers. comm. ; Galloway et al. 1996). Projected increases in N deposition for these trop- ical and subtropical regions, with a high natural background of N inputs, exceed increases projected for temperate and arctic regions (Cleveland et al. submitted; Galloway et al. 1994; Holland & Lamarque 1997a). Compared to biological N fixation, N deposition is becoming a proportionately greater source of N to terrestrial and aquatic ecosystems worldwide (Vitousek et al. 1997). 6 The nitrogen contained in the atmosphere as N , 3. 9 * 10 Tg (Tg = 2 | | 出版日期 | Book 1999 | | 關(guān)鍵詞 | bacteria; combustion; ecosystem; ecosystems; environment; plankton; soil | | 版次 | 1 | | doi | https://doi.org/10.1007/978-94-011-4645-6 | | isbn_softcover | 978-94-010-5961-9 | | isbn_ebook | 978-94-011-4645-6 | | copyright | Springer Science+Business Media Dordrecht 1999 |
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