Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015
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 . Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over...
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2019
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dataone:https://pasta.lternet.edu/package/metadata/eml/edi/363/1 2024-06-03T18:46:50+00:00 Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock 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,-112.094,55.895,55.895) BEGINDATE: 2012-06-11T00:00:00Z ENDDATE: 2015-08-06T00:00:00Z 2019-04-12T00:00:00Z https://pasta.lternet.edu/package/metadata/eml/edi/363/1 unknown Environmental Data Initiative Villanova Peatland Biogeochemistry Group ARA Acetylene Reduction Assay bogs peatland nitrogen fixation nitrogen deposition Dataset 2019 dataone:urn:node:EDI 2024-06-03T18:12:03Z 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 . Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH 4 NO 3 ) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha -1 yr -1 , plus controls (no water or N addition). We measured N 2 -fixation using the acetylene reduction technique between 2012 and 2015. All measurements were made between June and August. Mean acetylene reduction rates ranged from 2.2 mg m -2 da -1 (late June 2012) to 12.3 mg m -2 da -1 (late July 2014). Averaged across all measurement dates, rates were highest in the 5 kg N ha -1 yr -1 treatment, and decreased with increasing N loading. The acetylene reduction/N2 fixation response to N addition was described by a segmented linear regression, with rates increasing as N addition increased to 3.1 ± 1.5 kg N ha -1 yr -1 and decreasing with further increases in N addition. Water addition alone had no significant effect on N fixation rates on any of the measurement dates (p >= 0.79). While increasing N deposition may not substantively change total inputs of new N to bogs, the form on new N inputs shifts to inorganic N in deposition, rather than organic N produced by the microorganisms that are fixing N 2 . Dataset Fort McMurray Environmental Data Initiative (via DataONE) Canada Fort McMurray ENVELOPE(-112.094,-112.094,55.895,55.895) |
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Environmental Data Initiative (via DataONE) |
op_collection_id |
dataone:urn:node:EDI |
language |
unknown |
topic |
Villanova Peatland Biogeochemistry Group ARA Acetylene Reduction Assay bogs peatland nitrogen fixation nitrogen deposition |
spellingShingle |
Villanova Peatland Biogeochemistry Group ARA Acetylene Reduction Assay bogs peatland nitrogen fixation nitrogen deposition R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock Hope Fillingim Melissa House James C Quinn Kimberli D Scott Meaghan Petix Kelly J McMillen Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 |
topic_facet |
Villanova Peatland Biogeochemistry Group ARA Acetylene Reduction Assay bogs peatland nitrogen fixation nitrogen deposition |
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 . Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH 4 NO 3 ) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha -1 yr -1 , plus controls (no water or N addition). We measured N 2 -fixation using the acetylene reduction technique between 2012 and 2015. All measurements were made between June and August. Mean acetylene reduction rates ranged from 2.2 mg m -2 da -1 (late June 2012) to 12.3 mg m -2 da -1 (late July 2014). Averaged across all measurement dates, rates were highest in the 5 kg N ha -1 yr -1 treatment, and decreased with increasing N loading. The acetylene reduction/N2 fixation response to N addition was described by a segmented linear regression, with rates increasing as N addition increased to 3.1 ± 1.5 kg N ha -1 yr -1 and decreasing with further increases in N addition. Water addition alone had no significant effect on N fixation rates on any of the measurement dates (p >= 0.79). While increasing N deposition may not substantively change total inputs of new N to bogs, the form on new N inputs shifts to inorganic N in deposition, rather than organic N produced by the microorganisms that are fixing N 2 . |
format |
Dataset |
author |
R Kelman Wieder Dale H Vitt Melanie A Vile Jeremy A Graham Jeremy A Hartsock 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 Hope Fillingim Melissa House James C Quinn Kimberli D Scott Meaghan Petix Kelly J McMillen |
author_sort |
R Kelman Wieder |
title |
Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 |
title_short |
Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 |
title_full |
Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 |
title_fullStr |
Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 |
title_full_unstemmed |
Nitrogen Fixation Responses in Sphagnum fuscum to N-Additions to an Alberta Peatland, 2012-2015 |
title_sort |
nitrogen fixation responses in sphagnum fuscum to n-additions to an alberta peatland, 2012-2015 |
publisher |
Environmental Data Initiative |
publishDate |
2019 |
url |
https://pasta.lternet.edu/package/metadata/eml/edi/363/1 |
op_coverage |
Alberta, Canada, 100 km south of Fort McMurray, Canada ENVELOPE(-112.094,-112.094,55.895,55.895) BEGINDATE: 2012-06-11T00:00:00Z ENDDATE: 2015-08-06T00:00:00Z |
long_lat |
ENVELOPE(-112.094,-112.094,55.895,55.895) |
geographic |
Canada Fort McMurray |
geographic_facet |
Canada Fort McMurray |
genre |
Fort McMurray |
genre_facet |
Fort McMurray |
_version_ |
1800871755207671808 |