Asset Details
Do you wish to reserve the book?
Contrasting delta super(15)N Values of Atmospheric Deposition and Sphagnum Peat Bogs: N Fixation as a Possible Cause
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Contrasting delta super(15)N Values of Atmospheric Deposition and Sphagnum Peat Bogs: N Fixation as a Possible Cause
Do you wish to request the book?
Contrasting delta super(15)N Values of Atmospheric Deposition and Sphagnum Peat Bogs: N Fixation as a Possible Cause
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Contrasting delta super(15)N Values of Atmospheric Deposition and Sphagnum Peat Bogs: N Fixation as a Possible Cause
2016
Overview
Nitrogen (N) isotope systematics were investigated at two high-elevation ombrotrophic peat bogs polluted by farming and heavy industry. Our objective was to identify N sources and sinks for isotope mass balance considerations. For the first time, we present a time-series of delta super(15)I values of atmospheric input at the same locations as delta super(15)I values of living Sphagnum and peat. The mean delta super(15)I values systematically increased in the order: input NH sub(4) super(+) (-10.0ppt) < input NO sub(3) super(-) (-7.9ppt) < peat porewater (-5.6ppt) < Sphagnum (-5.0ppt) < shallow peat (-4.2ppt) < deep peat (-2.2ppt) < runoff (-1.4ppt) < porewater N sub(2)O (1.4ppt). Surprisingly, N of Sphagnum was isotopically heavier than N of the atmospheric input (P < 0.001). If partial incorporation of reactive N from the atmosphere into Sphagnum was isotopically selective, the residual N would have to be isotopically extremely light. Such N, however, was not identified anywhere in the ecosystem. Alternatively, Sphagnum may have contained an admixture of isotopically heavier N. Ambient air contains such N in the form of N sub(2) ( delta super(15)I sub(N2) = 0ppt). Because high energy is required to break the triple bond, microbial N fixation is likely to proceed only under limited availability of pollutant N. Also for the first time, a delta super(15)I comparison is presented between anoxic deeper peat and porewater N sub(2)O. Isotopically light N is removed from anoxic substrate by denitrification, whose final product, N sub(2), escapes into the atmosphere. Porewater N sub(2)O is an isotopically heavy residuum following partial N sub(2)O reduction to N sub(2).
Subject
We currently cannot retrieve any items related to this title. Kindly check back at a later time.