Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake,...
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2020
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dataone:https://pasta.lternet.edu/package/metadata/eml/edi/473/1 2024-06-03T18:46:50+00:00 Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock Jacqueline M.A. Popma Hope Fillingim Melissa House James C Quinn Kimberli D Scott Meaghan Petix Kelly J McMillen Alberta, Canada, 100 km south of Fort McMurray, Canada ENVELOPE(-112.094,-112.094,55.897,55.897) BEGINDATE: 2011-06-01T00:00:00Z ENDDATE: 2014-07-01T00:00:00Z 2020-03-24T00:00:00Z https://pasta.lternet.edu/package/metadata/eml/edi/473/1 unknown Environmental Data Initiative Villanova Peatland Biogeochemistry Group MLPF ammonification fens peatland mineralization nitrification nitrogen inorganic nitrogen ammonium nitrate Dataset 2020 dataone:urn:node:EDI 2024-06-03T18:16:15Z Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). From 2011 through 2014, we quantified net N mineralization in each plot using the in situ buried polyethylene bag technique. Concentrations of initial KCl-extractable NH4+-N, NO3--N, and DIN in the top 10 cm of peat were unaffected by N inputs. We hypothesized that as N deposition increases to a level that exceeds the capacity of the fen vegetation to take up N, net N mineralization in surface peat would be inhibited by higher NH4+-N availability, net nitrification would be stimulated by higher NH4+-N availability, and concentrations of DIN in porewater at the top of the water table would increase, as DIN bypasses interception by the ground layer vegetation. None of these hypotheses was supported. Experimentally added NH4+-N and NO3--N apparently appear to be rapidly immobilized. This immobilization prevents experimentally added DIN from moving downward through the peat to the bog water table. Dataset Fort McMurray Environmental Data Initiative (via DataONE) Canada Fort McMurray Mariana Lake ENVELOPE(-112.024,-112.024,55.951,55.951) ENVELOPE(-112.094,-112.094,55.897,55.897) |
institution |
Open Polar |
collection |
Environmental Data Initiative (via DataONE) |
op_collection_id |
dataone:urn:node:EDI |
language |
unknown |
topic |
Villanova Peatland Biogeochemistry Group MLPF ammonification fens peatland mineralization nitrification nitrogen inorganic nitrogen ammonium nitrate |
spellingShingle |
Villanova Peatland Biogeochemistry Group MLPF ammonification fens peatland mineralization nitrification nitrogen inorganic nitrogen ammonium nitrate R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock Jacqueline M.A. Popma Hope Fillingim Melissa House James C Quinn Kimberli D Scott Meaghan Petix Kelly J McMillen Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 |
topic_facet |
Villanova Peatland Biogeochemistry Group MLPF ammonification fens peatland mineralization nitrification nitrogen inorganic nitrogen ammonium nitrate |
description |
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). From 2011 through 2014, we quantified net N mineralization in each plot using the in situ buried polyethylene bag technique. Concentrations of initial KCl-extractable NH4+-N, NO3--N, and DIN in the top 10 cm of peat were unaffected by N inputs. We hypothesized that as N deposition increases to a level that exceeds the capacity of the fen vegetation to take up N, net N mineralization in surface peat would be inhibited by higher NH4+-N availability, net nitrification would be stimulated by higher NH4+-N availability, and concentrations of DIN in porewater at the top of the water table would increase, as DIN bypasses interception by the ground layer vegetation. None of these hypotheses was supported. Experimentally added NH4+-N and NO3--N apparently appear to be rapidly immobilized. This immobilization prevents experimentally added DIN from moving downward through the peat to the bog water table. |
format |
Dataset |
author |
R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock Jacqueline M.A. Popma Hope Fillingim Melissa House James C Quinn Kimberli D Scott Meaghan Petix Kelly J McMillen |
author_facet |
R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock Jacqueline M.A. Popma Hope Fillingim Melissa House James C Quinn Kimberli D Scott Meaghan Petix Kelly J McMillen |
author_sort |
R Kelman Wieder |
title |
Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 |
title_short |
Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 |
title_full |
Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 |
title_fullStr |
Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 |
title_full_unstemmed |
Net N mineralization rates in peat from N-Addition plots in an Alberta Poor Fen, 2011-2014 |
title_sort |
net n mineralization rates in peat from n-addition plots in an alberta poor fen, 2011-2014 |
publisher |
Environmental Data Initiative |
publishDate |
2020 |
url |
https://pasta.lternet.edu/package/metadata/eml/edi/473/1 |
op_coverage |
Alberta, Canada, 100 km south of Fort McMurray, Canada ENVELOPE(-112.094,-112.094,55.897,55.897) BEGINDATE: 2011-06-01T00:00:00Z ENDDATE: 2014-07-01T00:00:00Z |
long_lat |
ENVELOPE(-112.024,-112.024,55.951,55.951) ENVELOPE(-112.094,-112.094,55.897,55.897) |
geographic |
Canada Fort McMurray Mariana Lake |
geographic_facet |
Canada Fort McMurray Mariana Lake |
genre |
Fort McMurray |
genre_facet |
Fort McMurray |
_version_ |
1800871752837890048 |