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Impact of nutrient additions on free-living nitrogen fixation in litter and soil of two french-guianese lowland tropical forests

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Abstract
In tropical forests, free-living Biological nitrogen (N) fixation (BNF) in soil and litter tends to decrease when substrate N concentrations increase, whereas increasing phosphorus (P) and molybdenum (Mo) soil and litter concentrations have been shown to stimulate free-living BNF rates. Yet, very few studies explored the effects of adding N, P, and Mo together in a single large-scale fertilization experiment, which would teach us which of these elements constrain or limit BNF activities. At two distinct forest sites in French Guiana, we performed a 3-year in situ nutrient addition study to explore the effects of N, P, and Mo additions on leaf litter and soil BNF. Additionally, we conducted a short-term laboratory study with the same nutrient addition treatments (+N, +N+P, +P, +Mo, and +P+Mo). We found that N additions alone suppressed litter free-living BNF in the field, but not in the short-term laboratory study, while litter free-living BNF remained unchanged in response to N+P additions. Additionally, we found that P and P+Mo additions stimulated BNF in leaf litter, both in the field and in the lab, while Mo alone yielded no changes. Soil BNF increased with P and P+Mo additions in only one of the field sites, while in the other site soil BNF increased with Mo and P+Mo additions. We concluded that increased substrate N concentrations suppress BNF. Moreover, both P and Mo have the potential to limit free-living BNF in these tropical forests, but the balance between P versus Mo limitation is determined by site-specific characteristics of nutrient supply and demand.
Keywords
Paleontology, Atmospheric Science, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, phosphorus, molybdenum, feld fertilization, cross-site comparison, acetylene reduction assay, N-15(2) calibration, ACETYLENE-REDUCTION, N-2 FIXATION, RAIN-FOREST, LEAF-LITTER, PHOSPHORUS, MOLYBDENUM, LIMITATION, CARBON, HETEROGENEITY, POTASSIUM

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MLA
Van Langenhove, Leandro, et al. “Impact of Nutrient Additions on Free-Living Nitrogen Fixation in Litter and Soil of Two French-Guianese Lowland Tropical Forests.” JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, vol. 126, no. 7, 2021, doi:10.1029/2020jg006023.
APA
Van Langenhove, L., Depaepe, T., Verryckt, L. T., Vallicrosa, H., Fuchslueger, L., Lugli, L. F., … Janssens, I. A. (2021). Impact of nutrient additions on free-living nitrogen fixation in litter and soil of two french-guianese lowland tropical forests. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 126(7). https://doi.org/10.1029/2020jg006023
Chicago author-date
Van Langenhove, Leandro, Thomas Depaepe, Lore T. Verryckt, Helena Vallicrosa, Lucia Fuchslueger, Laynara F. Lugli, Laëtitia Bréchet, et al. 2021. “Impact of Nutrient Additions on Free-Living Nitrogen Fixation in Litter and Soil of Two French-Guianese Lowland Tropical Forests.” JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126 (7). https://doi.org/10.1029/2020jg006023.
Chicago author-date (all authors)
Van Langenhove, Leandro, Thomas Depaepe, Lore T. Verryckt, Helena Vallicrosa, Lucia Fuchslueger, Laynara F. Lugli, Laëtitia Bréchet, Roma Ogaya, Joan Llusia, Ifigenia Urbina, Albert Gargallo‐Garriga, Oriol Grau, Andreas Richter, Josep Penuelas, Dominique Van Der Straeten, and Ivan A. Janssens. 2021. “Impact of Nutrient Additions on Free-Living Nitrogen Fixation in Litter and Soil of Two French-Guianese Lowland Tropical Forests.” JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126 (7). doi:10.1029/2020jg006023.
Vancouver
1.
Van Langenhove L, Depaepe T, Verryckt LT, Vallicrosa H, Fuchslueger L, Lugli LF, et al. Impact of nutrient additions on free-living nitrogen fixation in litter and soil of two french-guianese lowland tropical forests. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES. 2021;126(7).
IEEE
[1]
L. Van Langenhove et al., “Impact of nutrient additions on free-living nitrogen fixation in litter and soil of two french-guianese lowland tropical forests,” JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, vol. 126, no. 7, 2021.
@article{8718423,
  abstract     = {{In tropical forests, free-living Biological nitrogen (N) fixation (BNF) in soil and litter tends to decrease when substrate N concentrations increase, whereas increasing phosphorus (P) and molybdenum (Mo) soil and litter concentrations have been shown to stimulate free-living BNF rates. Yet, very few studies explored the effects of adding N, P, and Mo together in a single large-scale fertilization experiment, which would teach us which of these elements constrain or limit BNF activities. At two distinct forest sites in French Guiana, we performed a 3-year in situ nutrient addition study to explore the effects of N, P, and Mo additions on leaf litter and soil BNF. Additionally, we conducted a short-term laboratory study with the same nutrient addition treatments (+N, +N+P, +P, +Mo, and +P+Mo). We found that N additions alone suppressed litter free-living BNF in the field, but not in the short-term laboratory study, while litter free-living BNF remained unchanged in response to N+P additions. Additionally, we found that P and P+Mo additions stimulated BNF in leaf litter, both in the field and in the lab, while Mo alone yielded no changes. Soil BNF increased with P and P+Mo additions in only one of the field sites, while in the other site soil BNF increased with Mo and P+Mo additions. We concluded that increased substrate N concentrations suppress BNF. Moreover, both P and Mo have the potential to limit free-living BNF in these tropical forests, but the balance between P versus Mo limitation is determined by site-specific characteristics of nutrient supply and demand.}},
  articleno    = {{e2020JG006023}},
  author       = {{Van Langenhove, Leandro and Depaepe, Thomas and Verryckt, Lore T. and Vallicrosa, Helena and Fuchslueger, Lucia and Lugli, Laynara F. and Bréchet, Laëtitia and Ogaya, Roma and Llusia, Joan and Urbina, Ifigenia and Gargallo‐Garriga, Albert and Grau, Oriol and Richter, Andreas and Penuelas, Josep and Van Der Straeten, Dominique and Janssens, Ivan A.}},
  issn         = {{2169-8953}},
  journal      = {{JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES}},
  keywords     = {{Paleontology,Atmospheric Science,Soil Science,Water Science and Technology,Ecology,Aquatic Science,Forestry,phosphorus,molybdenum,feld fertilization,cross-site comparison,acetylene reduction assay,N-15(2) calibration,ACETYLENE-REDUCTION,N-2 FIXATION,RAIN-FOREST,LEAF-LITTER,PHOSPHORUS,MOLYBDENUM,LIMITATION,CARBON,HETEROGENEITY,POTASSIUM}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{15}},
  title        = {{Impact of nutrient additions on free-living nitrogen fixation in litter and soil of two french-guianese lowland tropical forests}},
  url          = {{http://dx.doi.org/10.1029/2020jg006023}},
  volume       = {{126}},
  year         = {{2021}},
}

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