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A Coherent Signature of Anthropogenic Nitrogen Deposition to Remote Watersheds of the Northern Hemisphere

Holtgrieve, Gordon W.; Schindler, Daniel E.; Hobbs, William O.; Leavitt, Peter R.; Ward, Eric J.; Bunting, Lynda; Chen, Guangjie; Finney, Bruce P.; Gregory-Eaves, Irene and Holmgren, Sofia LU , et al. (2011) In Science 334(6062). p.1545-1548
Abstract
Humans have more than doubled the amount of reactive nitrogen (Nr) added to the biosphere, yet most of what is known about its accumulation and ecological effects is derived from studies of heavily populated regions. Nitrogen (N) stable isotope ratios (N-15:N-14) in dated sediments from 25 remote Northern Hemisphere lakes show a coherent signal of an isotopically distinct source of N to ecosystems beginning in 1895 +/- 10 years (+/- 1 standard deviation). Initial shifts in N isotope composition recorded in lake sediments coincide with anthropogenic CO2 emissions but accelerate with widespread industrial Nr production during the past half century. Although current atmospheric Nr deposition rates in remote regions are relatively low,... (More)
Humans have more than doubled the amount of reactive nitrogen (Nr) added to the biosphere, yet most of what is known about its accumulation and ecological effects is derived from studies of heavily populated regions. Nitrogen (N) stable isotope ratios (N-15:N-14) in dated sediments from 25 remote Northern Hemisphere lakes show a coherent signal of an isotopically distinct source of N to ecosystems beginning in 1895 +/- 10 years (+/- 1 standard deviation). Initial shifts in N isotope composition recorded in lake sediments coincide with anthropogenic CO2 emissions but accelerate with widespread industrial Nr production during the past half century. Although current atmospheric Nr deposition rates in remote regions are relatively low, anthropogenic N has probably influenced watershed N budgets across the Northern Hemisphere for over a century. (Less)
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Science
volume
334
issue
6062
pages
1545 - 1548
publisher
The American Association for the Advancement of Science
external identifiers
  • wos:000298091400050
  • scopus:83755169218
ISSN
1095-9203
DOI
10.1126/science.1212267
language
English
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yes
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e5fe3590-bcbe-4aba-a7df-a0255d1ecb76 (old id 2279375)
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2012-01-11 15:41:46
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2017-11-19 03:46:14
@article{e5fe3590-bcbe-4aba-a7df-a0255d1ecb76,
  abstract     = {Humans have more than doubled the amount of reactive nitrogen (Nr) added to the biosphere, yet most of what is known about its accumulation and ecological effects is derived from studies of heavily populated regions. Nitrogen (N) stable isotope ratios (N-15:N-14) in dated sediments from 25 remote Northern Hemisphere lakes show a coherent signal of an isotopically distinct source of N to ecosystems beginning in 1895 +/- 10 years (+/- 1 standard deviation). Initial shifts in N isotope composition recorded in lake sediments coincide with anthropogenic CO2 emissions but accelerate with widespread industrial Nr production during the past half century. Although current atmospheric Nr deposition rates in remote regions are relatively low, anthropogenic N has probably influenced watershed N budgets across the Northern Hemisphere for over a century.},
  author       = {Holtgrieve, Gordon W. and Schindler, Daniel E. and Hobbs, William O. and Leavitt, Peter R. and Ward, Eric J. and Bunting, Lynda and Chen, Guangjie and Finney, Bruce P. and Gregory-Eaves, Irene and Holmgren, Sofia and Lisac, Mark J. and Lisi, Peter J. and Nydick, Koren and Rogers, Lauren A. and Saros, Jasmine E. and Selbie, Daniel T. and Shapley, Mark D. and Walsh, Patrick B. and Wolfe, Alexander P.},
  issn         = {1095-9203},
  language     = {eng},
  number       = {6062},
  pages        = {1545--1548},
  publisher    = {The American Association for the Advancement of Science},
  series       = {Science},
  title        = {A Coherent Signature of Anthropogenic Nitrogen Deposition to Remote Watersheds of the Northern Hemisphere},
  url          = {http://dx.doi.org/10.1126/science.1212267},
  volume       = {334},
  year         = {2011},
}