Advanced search
1 file | 292.17 KB

Mechanisms for retention of bioavailable nitrogen in volcanic rainforest soils

(2008) NATURE GEOSCIENCE. 1(8). p.543-548
Author
Organization
Abstract
Nitrogen cycling is an important aspect of forest ecosystem functioning. Pristine temperate rainforests have been shown to produce large amounts of bioavailable nitrogen, but despite high nitrogen turnover rates, loss of bioavailable nitrogen is minimal in these ecosystems. This tight nitrogen coupling is achieved through fierce competition for bioavailable nitrogen by abiotic processes, soil microbes and plant roots, all of which transfer bioavailable nitrogen to stable nitrogen sinks, such as soil organic matter and above-ground forest vegetation. Here, we use a combination of in situ N-15 isotope dilution and N-15 tracer techniques in volcanic soils of a temperate evergreen rainforest in southern Chile to further unravel retention mechanisms for bioavailable nitrogen. We find three processes that contribute significantly to nitrogen bioavailability in rainforest soils: heterotrophic nitrate production, nitrate turnover into ammonium and into a pool of dissolved organic nitrogen that is not prone to leaching loss, and finally, the decoupling of dissolved inorganic nitrogen turnover and leaching losses of dissolved organic nitrogen. Identification of these biogeochemical processes helps explain the retention of bioavailable nitrogen in pristine temperate rainforests.
Keywords
DISSOLVED ORGANIC-MATTER, SOUTHERN CHILE, POOL DILUTION, PLANTATION FORESTS, TEMPERATE FORESTS, NITRATE, N-15, NITRIFICATION, ECOSYSTEMS, IMMOBILIZATION

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 292.17 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Huygens, Dries, Pascal Boeckx, Pamela Templer, Leandro Paulino, Oswald Van Cleemput, Carlos Oyarzún, Christoph Müller, and Roberto Godoy. 2008. “Mechanisms for Retention of Bioavailable Nitrogen in Volcanic Rainforest Soils.” Nature Geoscience 1 (8): 543–548.
APA
Huygens, Dries, Boeckx, P., Templer, P., Paulino, L., Van Cleemput, O., Oyarzún, C., Müller, C., et al. (2008). Mechanisms for retention of bioavailable nitrogen in volcanic rainforest soils. NATURE GEOSCIENCE, 1(8), 543–548.
Vancouver
1.
Huygens D, Boeckx P, Templer P, Paulino L, Van Cleemput O, Oyarzún C, et al. Mechanisms for retention of bioavailable nitrogen in volcanic rainforest soils. NATURE GEOSCIENCE. 2008;1(8):543–8.
MLA
Huygens, Dries, Pascal Boeckx, Pamela Templer, et al. “Mechanisms for Retention of Bioavailable Nitrogen in Volcanic Rainforest Soils.” NATURE GEOSCIENCE 1.8 (2008): 543–548. Print.
@article{525378,
  abstract     = {Nitrogen cycling is an important aspect of forest ecosystem functioning. Pristine temperate rainforests have been shown to produce large amounts of bioavailable nitrogen, but despite high nitrogen turnover rates, loss of bioavailable nitrogen is minimal in these ecosystems. This tight nitrogen coupling is achieved through fierce competition for bioavailable nitrogen by abiotic processes, soil microbes and plant roots, all of which transfer bioavailable nitrogen to stable nitrogen sinks, such as soil organic matter and above-ground forest vegetation. Here, we use a combination of in situ N-15 isotope dilution and N-15 tracer techniques in volcanic soils of a temperate evergreen rainforest in southern Chile to further unravel retention mechanisms for bioavailable nitrogen. We find three processes that contribute significantly to nitrogen bioavailability in rainforest soils: heterotrophic nitrate production, nitrate turnover into ammonium and into a pool of dissolved organic nitrogen that is not prone to leaching loss, and finally, the decoupling of dissolved inorganic nitrogen turnover and leaching losses of dissolved organic nitrogen. Identification of these biogeochemical processes helps explain the retention of bioavailable nitrogen in pristine temperate rainforests.},
  author       = {Huygens, Dries and Boeckx, Pascal and Templer, Pamela and Paulino, Leandro and Van Cleemput, Oswald and Oyarz{\'u}n, Carlos and M{\"u}ller, Christoph and Godoy, Roberto},
  issn         = {1752-0894},
  journal      = {NATURE GEOSCIENCE},
  keyword      = {DISSOLVED ORGANIC-MATTER,SOUTHERN CHILE,POOL DILUTION,PLANTATION FORESTS,TEMPERATE FORESTS,NITRATE,N-15,NITRIFICATION,ECOSYSTEMS,IMMOBILIZATION},
  language     = {eng},
  number       = {8},
  pages        = {543--548},
  title        = {Mechanisms for retention of bioavailable nitrogen in volcanic rainforest soils},
  url          = {http://dx.doi.org/10.1038/ngeo252},
  volume       = {1},
  year         = {2008},
}

Altmetric
View in Altmetric
Web of Science
Times cited: