Data Package Metadata View Summary

Net N Mineralization Rates in Peat From N-Addition Plots in an Alberta Peatland, 2011-2014

General Information

Data Package:
Local Identifier:	edi.147.4
Title:	Net N Mineralization Rates in Peat From N-Addition Plots in an Alberta Peatland, 2011-2014
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	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 NH₄NO₃) 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). 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 bog 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 (cf. McGill and Cole 1981, Robertson and Groffman 2015), 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.
Publication Date:	2019-01-15

Time Period

Begin:

2011-06-01

End:

2014-07-01

People and Organizations
Contact:	Wieder, R Kelman (Villanova University) [ email ]
Creator:	Wieder, R Kelman (Villanova University)
Creator:	Vitt, Dale H (Southern Illinois University)
Creator:	Vile, Melanie A (Villanova University)
Creator:	Graham, Jeremy A (Southern Illinois University)
Creator:	Hartsock, Jeremy A (Southern Illinois University)
Creator:	Fillingim, Hope (Villanova University)
Creator:	House, Melissa (Southern Illinois University)
Creator:	Quinn, James C (Villanova University)
Creator:	Scott, Kimberli D (Villanova University)
Creator:	Petix, Meaghan (Southern Illinois University)
Creator:	McMillen, Kelly J (Villanova University)

Data Entities
Data Table Name:	Net_N_mineralization.csv
Description:	Net N Mineralization Data

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/147/4/4b4efe595e1bc2659ba28c42e58ce5b0
Name:	Net_N_mineralization.csv
Description:	Net N Mineralization Data
Number of Records:	84
Number of Columns:	14

Table Structure

Object Name:

Net_N_mineralization.csv

Size:

6446 byte

Authentication:

2cc844a05cc7c1a66f9de48edfde9310 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

YEAR

NTRT

ARM

INITIAL_NH4_N

INITIAL_NO3__N

INITIAL_NH4_N_IN_TOP_10_cm_OF_PEAT

INITIAL_NO3_N_IN_TOP_10_cm_OF_PEAT

INITIAL_DIN_IN_TOP_10_cm_OF_PEAT

NET_AMMONIFICATION

NET_NITRIFICATION

NET_DIN_PRODUCTION

NET_AMMONIFICATION_IN_TOP_10_cm_OF_PEAT

NET_NITRIFICATION_IN_TOP_10_cm_OF_PEAT

NET_DIN_PRODUCTION_IN_TOP_10_cm_OF_PEAT

Definition:

Year of Sampling: 2011-2015

Field experimental N treatments were made with 8 applications per plot per year between mid-May and mid-August of each year

Experimental plots were located along 3 arms; each arm had one replicate each of 8 N treatments

Concentration of ammonium measured in the initial sample on a dry mass basis

Concentration of nitrate measured in the initial sample on a dry mass basis

Concentration of ammonium measured in the top 10 cm of sample per meter squared

Concentration of nitrate measured in the top 10 cm of sample per meter squared

Initial concentrations of nitrate and ammonium in the top 10 cm of peat per meter squared

Net ammonification calculated as the difference between final and initial extractable NH4+-N per dry mass

Net nitrification calculated as the difference between final and initial extractable NO3--N per dry mass

Net dissolved inorganic nitrogen production calculated as the sum of nitrate and ammonium differences from final and initial as expressed as per gram of dry mass per day

Net ammonification calculated as the difference between final and initial extractable NH4+-N per meter squared per day

Net nitrification calculated as the difference between final and initial extractable NO3--N per meter squared per day

Net dissolved inorganic nitrogen production calculated as the sum of nitrate and ammonium differences from final and initial as expressed as per meter squared per day

Storage Type:

date

string

float

Measurement Type:

dateTime

nominal

ratio

Measurement Values Domain:

Format	YYYY
Precision

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	C
Definition	Control, no water, no N added
Source

Code Definition

Code	0
Definition	0 kg N/ha/yr added as NH4NO3
Source

Code Definition

Code	5
Definition	5 kg N/ha/yr added as NH4NO3
Source

Code Definition

Code	10
Definition	10 kg N/ha/yr added as NH4NO3
Source

Code Definition

Code	15
Definition	15 kg N/ha/yr added as NH4NO3
Source

Code Definition

Code	20
Definition	20 kg N/ha/yr added as NH4NO3
Source

Code Definition

Code	25
Definition	25 kg N/ha/yr added as NH4NO3
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	Arm 1
Source

Code Definition

Code	2
Definition	Arm 2
Source

Code Definition

Code	3
Definition	Arm 3
Source

Unit	microgramsPerGram
Type	real
Min	4.19
Max	67.82

Unit	microgramsPerGram
Type	real
Min	1.63
Max	28.78

Unit	milligramsPerSquareMeter
Type	real
Min	9.39
Max	107.84

Unit	milligramsPerSquareMeter
Type	real
Min	3.28
Max	31.55

Unit	milligramsPerSquareMeter
Type	real
Min	13.23
Max	133.47

Unit	microgramsPerGramPerDay
Type	real
Min	-1668.1
Max	1866.6

Unit	microgramsPerGramPerDay
Type	real
Min	-401.6
Max	552.9

Unit	microgramsPerGramPerDay
Type	real
Min	-2069.7
Max	2419.5

Unit	microgramsPerMeterSquaredPerDay
Type	real
Min	-1844.8
Max	2338.7

Unit	microgramsPerMeterSquaredPerDay
Type	real
Min	-774.4
Max	692.7

Unit	microgramsPerMeterSquaredPerDay
Type	real
Min	-2288.9
Max	3031.4

Missing Value Code:

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Code	-99999
Expl	Missing value

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This data package is released to the “public domain” under Creative Commons CC0 1.0 “No Rights Reserved” (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein “website”) in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available “as is” and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
(No thesaurus)	Villanova Peatland Biogeochemistry Group, bogs, peatland, mineralization, ammonification, nitrification, nitrogen, inorganic nitrogen, ammonium, nitrate

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

From 2011 through 2014, we quantified net N mineralization in each plot using the in situ buried polyethylene bag technique (Robertson et al. 1999; Bayley et al. 2005). In the last week of June of each year, we collected peat cores (6.5 cm diam., 10 cm deep), halved them longitudinally with a serrated bread knife, and placed them into separate polyethylene Whirl Pak bags (initial N core and final N core), removing any live aboveground vascular vegetation from each peat core prior to placement into Whirl Pak bags. Immediately after collection from the field, we extracted initial N cores (60 min per extraction) with 0.2 M KCl to displace NH₄ ⁺-N and NO₃ ^--N (modified from Verhoeven et al. 1990). We buried final N cores in the peat profile from the same location from which they were removed and incubated in the peat matrix for approximately 30 days. Following the field incubation period, we extracted final N cores with 0.2 M KCl.

For 2011-2012 samples, we measured extractable NH₄ ⁺-N and NO₃ ^--N concentrations on a Seal AA3 Autoanalyzer using phenate and hydrazine reduction methods, respectively; for 2013-2014 samples, we measured extractable NH₄ ⁺-N and NO₃ ^--N concentrations on an OI Analytical Flow Solution IV instrument using the alkaline phenol and cadmium reduction methods, respectively. We calculated net ammonification from the difference between final and initial extractable NH₄ ⁺-N contents, net nitrification from the difference between final and initial extractable NO₃ ^--N contents, and net N mineralization from the difference between final and initial extractable NH₄ ⁺-N plus NO₃ ^--N contents.

People and Organizations

Creators:

Individual:

R Kelman Wieder

Organization:

Villanova University

Email Address:

kelman.wieder@villanova.edu

Id:

https://orcid.org/0000-0001-5856-8473

Individual:	Dale H Vitt
Organization:	Southern Illinois University

Individual:

Melanie A Vile

Organization:

Villanova University

Email Address:

mvile@villanova.edu

Individual:

Jeremy A Graham

Organization:

Southern Illinois University

Email Address:

jeremyg@mtu.edu

Individual:

Jeremy A Hartsock

Organization:

Southern Illinois University

Email Address:

hartsock@siu.edu

Individual:

Hope Fillingim

Organization:

Villanova University

Email Address:

fillingimhope@gmail.com

Individual:

Melissa House

Organization:

Southern Illinois University

Email Address:

mhouse@siu.edu

Individual:

James C Quinn

Organization:

Villanova University

Email Address:

jcqui03@gmail.com

Individual:

Kimberli D Scott

Organization:

Villanova University

Email Address:

kscott@villanova.edu

Individual:

Meaghan Petix

Organization:

Southern Illinois University

Email Address:

meaghan.petix@wsu.edu

Individual:

Kelly J McMillen

Organization:

Villanova University

Email Address:

Kelly.Mcmillen@ttu.edu

Contacts:

Individual:

R Kelman Wieder

Organization:

Villanova University

Email Address:

kelman.wieder@villanova.edu

Id:

https://orcid.org/0000-0001-5856-8473

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2011-06-01

End:

2014-07-01

Sampling Site:

Description:

Alberta, Canada, 100 km south of Fort McMurray, Canada

Site Coordinates:

Longitude (degree):

-112.094

Latitude (degree):

55.895

Project

Parent Project Information:

Title:

Nitrogen Addition Experiments in Boreal Ecosystems: Understanding the Fate of Atmospherically Deposited Nitrogen in order to Determine Nitrogen Critical Loads

Personnel:

Individual:

R Wieder

Email Address:

kelman.wieder@villanova.edu

Id:

https://orcid.org/0000-0001-5856-8473

Role:

Principal Investigator

Funding:

Cumulative Environmental Management Association (CEMA): 2011-0003

Maintenance

Maintenance:

Description:	completed
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'milligramsPerGram'
        |     |     |     |  \___attribute 'multiplierToSI' = '1000'
        |     |     |     |  \___attribute 'name' = 'milligramsPerGram'
        |     |     |     |  \___attribute 'parentSI' = 'kilogram'
        |     |     |     |  \___attribute 'unitType' = 'mass'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'milligrams per gram'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microgramsPerGram'
        |     |     |     |  \___attribute 'multiplierToSI' = '1000000'
        |     |     |     |  \___attribute 'name' = 'microgramsPerGram'
        |     |     |     |  \___attribute 'parentSI' = 'kilogram'
        |     |     |     |  \___attribute 'unitType' = 'mass'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'micrograms per gram'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microgramsPerGramPerDay'
        |     |     |     |  \___attribute 'multiplierToSI' = '11.5740741'
        |     |     |     |  \___attribute 'name' = 'microgramsPerGramPerDay'
        |     |     |     |  \___attribute 'parentSI' = 'kilogramPerSecond'
        |     |     |     |  \___attribute 'unitType' = 'mass flux'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'micrograms per gram per day'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microgramsPerMeterSquaredPerDay'
        |     |     |     |  \___attribute 'multiplierToSI' = '1.728E+11'
        |     |     |     |  \___attribute 'name' = 'microgramsPerMeterSquaredPerDay'
        |     |     |     |  \___attribute 'parentSI' = 'kilogramsPerSquareMeterPerSecond'
        |     |     |     |  \___attribute 'unitType' = 'areal mass flux'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'micrograms per meter squared per day'
        |     |     |     |___text '\n        '
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        |___text '\n  '

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Data Package Metadata View Summary

Net N Mineralization Rates in Peat From N-Addition Plots in an Alberta Peatland, 2011-2014

Data Entities

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Net N Mineralization Rates in Peat From N-Addition Plots in an Alberta Peatland, 2011-2014

+/- Data Entities

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata