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Pre-dawn Water Potential for leaves from Reduced and Enhanced Precipitation Treatments on the Jornada Basin, 2007-2008

General Information
Data Package:
Local Identifier:knb-lter-jrn.210409009.75
Title:Pre-dawn Water Potential for leaves from Reduced and Enhanced Precipitation Treatments on the Jornada Basin, 2007-2008
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This data package contains water potential data for leaves collected from mesquite shrubs and black grama grasses at the Jornada Basin LTER site in 2007-2008. The purpose of this study was to quantify ecophysiological performance of shrubs and grasses in the context of precipitation manipulations. One mesquite and one black grama leaf from each plot (n = 20 plots; 5 PPT treatments X 4 replicate plots/treatment) were measured 5 times beginning July 2007 and ending in August 2008. The precipitation treatmensts consisted of +/-80%, +/-50%, and ambient/control. Leaves were excised from plants and immediately measured for water potential (MPa) with a pressure chamber at least 0.5 h before dawn. The data set is complete.

Publication Date:2020-09-15

Time Period
Begin:
2007-07-25
End:
2008-09-20

People and Organizations
Contact:Data Manager(Jornada Basin LTER) [  email ]
Creator:Sala, Osvaldo (Arizona State University)
Creator:Throop, Heather (Arizaona State University)

Data Entities
Data Table Name:
JRN Pre-dawn water potential, 2007-2008
Description:
Pre-dawn water potential of shrub and grass leaves on the Jornada Basin, 2007-2008
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210409009/75/b74fc701573b002c0c7c5afa4b8ad848
Name:JRN Pre-dawn water potential, 2007-2008
Description:Pre-dawn water potential of shrub and grass leaves on the Jornada Basin, 2007-2008
Number of Records:240
Number of Columns:5

Table Structure
Object Name:JRN_409002_predawn_water_potential.csv
Size:7033 bytes
Authentication:c522900dff8c87731d8f6c095171ef98 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 
Column Name:date  
plot  
spp  
ppttrt  
waterpot  
Definition:Date data was collectedPlot number established by Sala<ca>plant species measured for water potential 4-letter plant species codePrecipitation treatment of the plotleaf water potential
Storage Type:date  
float  
string  
string  
float  
Measurement Type:dateTimerationominalnominalratio
Measurement Values Domain:
FormatYYYY-MM-DD
Precision
Unitdimensionless
Typenatural
Min201 
Max244 
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodePRGL
DefinitionProsopis glandulosa
Source
Code Definition
CodeBOER
DefinitionBouteloua eriopoda
Source
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code-80%
Definition80% reduced precipitation
Source
Code Definition
Code-50%
Definition50% reduced precipitation
Source
Code Definition
Code0%
Definitioncontrol
Source
Code Definition
Code50%
Definition50% increase precipitation
Source
Code Definition
Code80%
Definition80% increase precipitation
Source
Unitmegapascal
Typereal
Min-7.5 
Max-0.1 
Missing Value Code:          
Accuracy Report:          
Accuracy Assessment:          
Coverage:          
Methods:          

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data (\"Data User\" herein) has an ethical obligation to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabularydeserts, grasslands, shrubs, plant ecology, plant communities, plant species, water chemistry, plant properties, water content, transpiration
Jornada Project Namesstudy 409
JRN Dataset KeywordsVegetation Dynamics, Land-Atmosphere Interactions
Jornada Place NamesJER
LTER Core AreaPopulations

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:

To investigate the pre-dawn water potential, 20 plots (each 2.5m x 2.5m) were established on the Jornada Basin LTER. Five precipitation treatments (+/-80%, +/-50%, and control/ambient PPT) and 4 replicates per plots were used to compare differences in water potential of leaves collected from mesquite (Prosopis glandulosa) and black grama (Bouteloua eriopoda). Each plot was centered around a mature mesquite shrub with a mean height of 0.5m, and mean canopy diameter of 1.1 m. PPT manipulations used a combination of rain-out shelters and irrigation systems.

One mesquite and one black grama leaf from each plot were measured on 7/25/07, 8/18/07, 7/21/08, 7/25/08, and 8/13/08. Leaves were excised from plants and immediately measured and were completed at least 0.5 h before dawn. Predawn leaf water potential was quantified with pressure chambers (black grama: model 1000, with 100 bar capacity; PMS Instrument Co, Corvallis, OR; mesquite: model 2005, Soil Moisture Equipment Corp, Santa Barbara, CA).

The data set includes the date of collection, plot, plant species, ppt treatment, and leaf water potiential (MPa). This study was completed on August 13, 2008.

For more details, see Throop, H.L., Reichmann, L.G., Sala, O.E. and Archer, S.R., 2012. Response of dominant grass and shrub species to water manipulation: an ecophysiological basis for shrub invasion in a Chihuahuan Desert grassland. Oecologia, 169(2), DOI 10.1007/s00442-011-2217-4.

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Creators:
Individual: Osvaldo Sala
Organization:Arizona State University
Id:https://orcid.org/0000-0003-0142-9450
Individual: Heather Throop
Organization:Arizaona State University
Id:https://orcid.org/0000-0002-7963-4342
Contacts:
Individual: Data Manager
Organization:Jornada Basin LTER
Email Address:
datamanager.jrn.lter@gmail.com

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
2007-07-25
End:
2008-09-20
Geographic Region:
Description:Basin_Floor
Bounding Coordinates:
Northern:  32.7494871Southern:  32.47317259
Western:  -106.8728831Eastern:  -106.6927163

Project

Parent Project Information:

Title:No project title to report
Personnel:
Individual: Steve Archer
Organization:The University of Arizona
Id:https://orcid.org/0000-0002-5539-4129
Role:Principal Investigator
Funding: No funding to report
Related Project:
Title:No project title to report
Personnel:
Individual: Lara Reichmann
Organization:Univeristy of Texas Austin
Id:https://orcid.org/0000-0002-9737-7300
Role:Principal Investigator
Funding: No funding to report

Maintenance

Maintenance:
Description:complete
Frequency:

Additional Info

Additional Information:
 

Creosotebush zone plots (C) in Caliche area (CALI) about 40 meters upslope from C-CALI NPP site, and in area of termite studies (TERM) located about 300 meters west of Upper Trailer. Grassland (G) plots at Mt. Summerford (SUMM) upslope of powerline, and about 50 meters east of LTER-I Alternate Control Transect, and about 30 meters west of the southwest corner of the IBP exclosure on the USDA Jornada Experimental Range.

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'megapascal'
        |     |     |     |  \___attribute 'multiplierToSI' = '1000000'
        |     |     |     |  \___attribute 'name' = 'megapascal'
        |     |     |     |  \___attribute 'parentSI' = 'pascal'
        |     |     |     |  \___attribute 'unitType' = 'pressure'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'megapascal'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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