Data Package Metadata View Summary

Concentrations of Nitrogen and Carbon in Playas on the Jornada LTER, 2012

General Information

Data Package:
Local Identifier:	knb-lter-jrn.210420001.2
Title:	Concentrations of Nitrogen and Carbon in Playas on the Jornada LTER, 2012
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Ephemerally-flooded wetlands, called playas, are important areas of soil organic carbon and nutrient storage in drylands. We conducted this study to assess how catchment biophysical variables control soil organic carbon and nitrogen in playas and how playas function differently than upland ecosystems. This dataset contains data related to soil and carbon stocks in playas located in the Jornada Basin LTER (JRN) at different depths. We chose 30 playas from across JRN to measure soil organic carbon and total nitrogen concentrations. In each study playa, we collected 36 soil samples. The soil samples were collected from nine locations along two perpendicular transect lines to account for a topographic gradient from the edge of the playa to the center of the playa. At each of the nine locations, one sample was collected at four depths (0–10 cm, 10–30 cm, 30–60 cm, 60–100 cm). We measured soil organic carbon and total nitrogen concentrations using elemental combustion analysis. Using bulk density measurements for each depth range (m), we converted each soil measurement (g/g) to calculate concentrations of organic carbon and nitrogen per unit area (g/m^2) within 10 cm of soil. This study is complete. For further information, refer to: McKenna, O. P. and O. E. Sala. 2016. Biophysical controls over concentration and depth distribution of soil organic carbon and nitrogen in desert playas. JGR Biosciences 121: 3019-3029.
Publication Date:	2019-07-11

Time Period

Begin:

2012-06-20

End:

2012-07-18

People and Organizations
Contact:	Manager, Data [ email ]
Creator:	McKenna, Owen
Creator:	Sala, Osvaldo
Associate:	Jornada Basin LTER

Data Entities
Data Table Name:	Carbon and Nitrogen in Playas on the Jornada
Description:	Carbon and Nitrogen in Playas on the Jornada

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210420001/2/26ad2e5d4bcf3166f1743376e4689029
Name:	Carbon and Nitrogen in Playas on the Jornada
Description:	Carbon and Nitrogen in Playas on the Jornada
Number of Records:	1080
Number of Columns:	11

Table Structure

Object Name:

JRNstudy420_CarbonNitrogen_data.csv

Size:

83405 bytes

Authentication:

90b2bbf91bef3722e2034f2de04f3a7f Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Date

Playa

Sample

Depth

gNpergsoil

gCpergsoil

BulkDensity

sample_depth

cm2tom2converter

gNperm2per10cm

gCperm2per10cm

Definition:

Date of collection

playa id number

sample id number at given depth (1-9)

depth strata: (1)0-10cm; (2): 10-30 cm; (3): 30-60 cm; (4): 60-100 cm)

grams of nitrogen per gram of soil

grams of carbon per gram of soil

bulk density (g/m3)

depth over which gNperm2per10cm and gCperm2per10 cm are estimated

converter to convert TN to amount in 10 cm depth of soil

grams/m2 nitrogen in 10 cm depth of soil

grams/m2 carbon in 10 cm depth of soil

Storage Type:

date

string

float

Measurement Type:

dateTime

nominal

ratio

Measurement Values Domain:

Format	mm/dd/yy
Precision

Definition

playa id number

Definition

sample id number at given depth (1-9)

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	0-10 cm
Source

Code Definition

Code	2
Definition	10-30 cm
Source

Code Definition

Code	3
Definition	30-60 cm
Source

Code Definition

Code	4
Definition	60-100 cm
Source

Unit	gramsPerGram
Type	real
Min	0
Max	0

Unit	gramsPerGram
Type	real
Min	0
Max	0.04

Unit	gramsPerCubicCentimeter
Type	real
Min	0.88
Max	1.91

Unit	centimeter
Type	natural
Min	10
Max	10

Unit	dimensionless
Type	natural
Min	10000
Max	10000

Unit	gramsPerMeterSquaredPerTenCentimeter
Type	real
Min	4.53
Max	551.51

Unit	gramsPerMeterSquaredPerTenCentimeter
Type	real
Min	30.96
Max	5661.56

Missing Value Code:

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

Code	.
Expl	sample data missing

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:
LTER Core Area	Organic Matter, Disturbance
JRN Dataset Keywords	Plant, Nitrogen, and Micronutrients, non-core
LTER Controlled Vocabulary	playa, nitrogen, carbon
keywords	soil organic carbon, dryland catchments

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:

We chose 30 playas from across JRN to measure soil organic carbon and total nitrogen concentrations. We consulted the Jornada Basin landform map and available aerial imagery to choose 30 out of 99 potential playas that encompassed a broad range of sizes, catchment characteristics, and proximities to different geological features. The perimeter of each playa was ground-truthed using a Trimble Geo 7X handheld GPS (Trimble Navigation Limited, Sunnyvale, CA). In each study playa, we collected 36 soil samples of 100 g each using a 70 mm diameter one‐piece hand auger (Forestry Suppliers Inc., Jackson, MS). The soil samples were collected from nine locations along two perpendicular transect lines to account for a topographic gradient from the edge of the playa to the center of the playa. At each of the nine locations, one sample was collected at four depths (0–10 cm, 10–30 cm, 30–60 cm, 60–100 cm). Each soil sample was dried at 105°C for 24 h, homogenized, sieved through 2 mm mesh screen, and frozen before analysis.

We measured soil organic carbon and total nitrogen concentrations using elemental combustion analysis. We first ground homogenized soil subsamples using a ball mill. We then prepared 45 mg of ground soil samples in silver tins. We acid fumigated the soils to eradicate inorganic. Lastly, we sealed each fumigated sample and combusted them to estimate organic carbon (g C/g soil) and total nitrogen (g N/g soil) in each soil sample using an ECS 4010 elemental analyzer (Costech Analytical Technologies, Valencia, CA, USA). We also estimated soil bulk density (g/m^3) from three locations at each sample depth for all 30 playas using the core volume sampling method. Using bulk density measurements for each depth range (m), we converted each soil measurement (g/g) to calculate concentrations of organic carbon and nitrogen per unit area (g/m^2).

People and Organizations

Creators:

Individual:

Owen McKenna

Individual:

Osvaldo Sala

Email Address:

Osvaldo.Sala@asu.edu

Contacts:

Individual:

Data Manager

Email Address:

datamanager.jrn.lter@gmail.com

Associated Parties:

Individual:

Jornada Basin LTER

Email Address:

https://jornada.nmsu.edu/lter

Role:

Organization

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2012-06-20

End:

2012-07-18

Geographic Region:

Description:

Our study site is located in the northern Chihuahuan Desert, approximately 25 km northeast of Las Cruces, New Mexico, USA (+32.6 N, -106.7 W, elevation 1315 m). Annual precipitation is 24 cm and maximum temperatures average 13 C in January and 36 C in June. Our study site includes the 78,000 ha Jornada Experimental Range operated by the USDA Agricultural Research Service (http://jornada.nmsu.edu/), and the 22,000 ha Chihuahuan Desert Rangeland Research Center (CDRRC, http://chihuahuansc.nmsu.edu/) operated by New Mexico State University (http://www.nmsu.edu/). Please contact our data information for site locations.

Bounding Coordinates:

Northern:	32.488	Southern:	32.669
Western:	-106.865	Eastern:	-106.713

Project

Maintenance

Maintenance:

Description:	Sampling occured once at each playa site at each depth during the summer of 2012. This sampling is complete.
Frequency:

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'gramsPerMeterSquaredPerTenCentimeter'
        |     |     |     |  \___attribute 'multiplierToSI' = '1'
        |     |     |     |  \___attribute 'name' = 'gramsPerMeterSquaredPerTenCentimeter'
        |     |     |     |  \___attribute 'parentSI' = 'grams'
        |     |     |     |  \___attribute 'unitType' = 'mass'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'number of grams in a square meter of 10 centimeters in depth'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'gramsPerGram'
        |     |     |     |  \___attribute 'multiplierToSI' = '1'
        |     |     |     |  \___attribute 'name' = 'gramsPerGram'
        |     |     |     |  \___attribute 'parentSI' = 'grams'
        |     |     |     |  \___attribute 'unitType' = 'mass'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'grams of element per gram of soil'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

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Data Package Metadata View Summary

Concentrations of Nitrogen and Carbon in Playas on the Jornada LTER, 2012

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

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Concentrations of Nitrogen and Carbon in Playas on the Jornada LTER, 2012

+/- 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

+/- 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