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Abstract
Atmospheric nitrogen (N) deposition is an important determinant of N availability for natural ecosystems worldwide. Increased anthropogenic N deposition shifts the stoichiometric equilibrium of ecosystems, with direct and indirect impacts on ecosystem functioning and biogeochemical cycles. Current simulation data suggest that remote tropical forests still receive low atmospheric N deposition due to a lack of proximate industry, low rates of fossil fuel combustion, and absence of intensive agriculture. We present field-based N deposition data for forests of the central Congo Basin, and use ultrahigh-resolution mass spectrometry to characterize the organic N fraction. Additionally, we use satellite data and modeling for atmospheric N source apportionment. Our results indicate that these forests receive 18.2 kg N hectare(-1) years(-1) as wet deposition, with dry deposition via canopy interception adding considerably to this flux. We also show that roughly half of the N deposition is organic, which is often ignored in N deposition measurements and simulations. The source of atmospheric N is predominantly derived from intensive seasonal burning of biomass on the continent. This high N deposition has important implications for the ecology of the Congo Basin and for global biogeochemical cycles more broadly.
Keywords
nitrogen deposition, central Africa, Congo Basin, biomass burning, FT-ICR-MS, DISSOLVED ORGANIC-MATTER, GLOBAL ASSESSMENT, TROPICAL FORESTS, DRY DEPOSITION, CARBON-CYCLE, ECOSYSTEMS, PHOSPHORUS, CLIMATE, SYSTEM, PRODUCTIVITY

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Chicago
Bauters, Marijn, Travis W Drake, Hans Verbeeck, Samuel Bodé, Pedro Alejandro Hervé Fernández, Phoebe Zito, David C Podgorski, et al. 2018. “High Fire-derived Nitrogen Deposition on Central African Forests.” Proceedings of the National Academy of Sciences of the United States of America 115 (3): 549–554.
APA
Bauters, Marijn, Drake, T. W., Verbeeck, H., Bodé, S., Hervé Fernández, P. A., Zito, P., Podgorski, D. C., et al. (2018). High fire-derived nitrogen deposition on central African forests. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 115(3), 549–554.
Vancouver
1.
Bauters M, Drake TW, Verbeeck H, Bodé S, Hervé Fernández PA, Zito P, et al. High fire-derived nitrogen deposition on central African forests. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2018;115(3):549–54.
MLA
Bauters, Marijn, Travis W Drake, Hans Verbeeck, et al. “High Fire-derived Nitrogen Deposition on Central African Forests.” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.3 (2018): 549–554. Print.
@article{8543480,
  abstract     = {Atmospheric nitrogen (N) deposition is an important determinant of N availability for natural ecosystems worldwide. Increased anthropogenic N deposition shifts the stoichiometric equilibrium of ecosystems, with direct and indirect impacts on ecosystem functioning and biogeochemical cycles. Current simulation data suggest that remote tropical forests still receive low atmospheric N deposition due to a lack of proximate industry, low rates of fossil fuel combustion, and absence of intensive agriculture. We present field-based N deposition data for forests of the central Congo Basin, and use ultrahigh-resolution mass spectrometry to characterize the organic N fraction. Additionally, we use satellite data and modeling for atmospheric N source apportionment. Our results indicate that these forests receive 18.2 kg N hectare(-1) years(-1) as wet deposition, with dry deposition via canopy interception adding considerably to this flux. We also show that roughly half of the N deposition is organic, which is often ignored in N deposition measurements and simulations. The source of atmospheric N is predominantly derived from intensive seasonal burning of biomass on the continent. This high N deposition has important implications for the ecology of the Congo Basin and for global biogeochemical cycles more broadly.},
  author       = {Bauters, Marijn and Drake, Travis W and Verbeeck, Hans and Bod{\'e}, Samuel and Herv{\'e} Fern{\'a}ndez, Pedro Alejandro and Zito, Phoebe and Podgorski, David C and Boyemba, Faustin and Makelele, Isaac and Cizungu Ntaboba, Landry and Spencer, Robert GM and Boeckx, Pascal},
  issn         = {0027-8424},
  journal      = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA},
  keyword      = {nitrogen deposition,central Africa,Congo Basin,biomass burning,FT-ICR-MS,DISSOLVED ORGANIC-MATTER,GLOBAL ASSESSMENT,TROPICAL FORESTS,DRY DEPOSITION,CARBON-CYCLE,ECOSYSTEMS,PHOSPHORUS,CLIMATE,SYSTEM,PRODUCTIVITY},
  language     = {eng},
  number       = {3},
  pages        = {549--554},
  title        = {High fire-derived nitrogen deposition on central African forests},
  url          = {http://dx.doi.org/10.1073/pnas.1714597115},
  volume       = {115},
  year         = {2018},
}

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