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Photosynthetic rates of leaves from reduced and enhanced precipitation treatments at the Jornada Basin LTER site, 2007-2008

General Information
Data Package:
Local Identifier:knb-lter-jrn.210409001.79
Title:Photosynthetic rates of leaves from reduced and enhanced precipitation treatments at the Jornada Basin LTER site, 2007-2008
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This data package contains photosynthetic rate 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. Plots were subjected to precipitation treatments consisting of +/-80%, +/-50%, and ambient/control. A subset of plots also had a nitrogen addition treatment. Leaves were excised from plants and immediately measured for photosynthetic rate under ideal conditions in a LiCor cuvette. This study has been completed. 

Publication Date:2021-12-16
Language:English
For more information:
Visit: https://jrn.lternet.edu
Visit: DOI PLACE HOLDER

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

People and Organizations
Contact:Jornada Basin LTER Information Manager (Jornada Basin LTER) [  email ]
Creator:Throop, Heather (Arizona State University)
Creator:Archer, Steven (The University of Arizona)
Creator:Reichmann, Lara (Arizona State University)
Creator:Sala, Osvaldo E (Arizona State University)

Data Entities
Data Table Name:
Leaf photosynthesis data
Description:
Leaf photosynthesis measurements of shrub and grass leaves at precipitation treatment plots, 2007-2008
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210409001/79/52e4db1905fe1e375ca26758cc6e01cd
Name:Leaf photosynthesis data
Description:Leaf photosynthesis measurements of shrub and grass leaves at precipitation treatment plots, 2007-2008
Number of Records:238
Number of Columns:6

Table Structure
Object Name:JRN409001_leaf_photosynthesis.csv
Size:7509 byte
Authentication:e613fe0c5fa89ee798a3d0fc5350751f Calculated By MD5
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 Species codeDatePlotPrecipitation treatmentNitrogen treatmentPhotosynthesis
Column Name:spp  
date  
plot  
ppttrt  
Ntrt  
photosyn  
Definition:Plant species measured (USDA Plants species code)Measurement datePlot number (established by Sala)Precipitation treatment of the plot (0.2, 0.5, 1, 1.5, 1.8)Nitrogen treatment of the plot (1, 0)Leaf photosynthetic rate (millimolesPerSquareMeterPerSecond)
Storage Type:string  
dateTime  
integer  
float  
integer  
float  
Measurement Type:nominaldateTimeintervalnominalnominalratio
Measurement Values Domain:
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeBOER4
DefinitionBouteloua eriopoda
Source
Code Definition
CodePRGL2
DefinitionProsopis glandulosa
Source
FormatYYYY-MM-DD
Precision1
Unitnumber
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code0.2
Definition20% ambient precipitation (achieved with rainout shelter)
Source
Code Definition
Code0.5
Definition50% ambient precipitation (achieved with rainout shelter)
Source
Code Definition
Code1
Definitionambient precipitation (control)
Source
Code Definition
Code1.5
Definition150% ambient precipitation (achieved with supplemental irrigation)
Source
Code Definition
Code1.8
Definition180% ambient precipitation (achieved with supplemental irrigation)
Source
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code0
Definitionno ammonium nitrate fertilizer applied
Source
Code Definition
Code1
Definitionammonium nitrate fertilizer applied
Source
UnitmillimolePerMeterSquaredPerSecond
Typereal
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) is required 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 Core Research Areasinorganic nutrients, primary production
LTER Controlled Vocabulary v1LTER, climate change, deserts, droughts, grasslands, irrigation, photosynthesis, plant ecology, plant physiology, plant species, precipitation, shrubs, vegetation dynamics
noneAmax, climate change, ecophysiology, photosynthesis, precipitation, precipitation manipulation
Jornada Basin LTER dataset keywordsLand-Atmosphere Interactions, Vegetation Dynamics
Jornada Basin project namesLTREB global change, study 409
Jornada Basin place namesJER, Pasture 13

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:

Study design

To investigate the plant physiological responses to drought and enhanced precipitation, 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 plots per treatment were measured to compare differences in pre-dawn 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. Precipitation manipulations used a combination of rain-out shelters and irrigation systems.

One mesquite and one black grama leaf from each plot were excised from plants and immediately measured on 7/25/07, 8/18/07, 7/21/08, 7/25/08, 8/13/08, and 9/20/08. Measurements were made for one leaf for each species from each plot selected for measurements. Measurements were made on a LiCor 6400 with optimal conditions for photosynthesis (PAR = 1500-2000 umol m-2 sec-1, leaf temperature 25-32 C, RH 30-70%). Measurements were made in the morning.

The dataset includes the date of collection, plot, plant species, ppt treatment, N treatment, and photosynthetic rate (millimoles per square meter per second). Photosynthetic rates have been recalculated based on cuvette leaf area. This study was completed on August 13, 2008.

References:

For more details, see

Throop, Heather L., Lara G. Reichmann, Osvaldo E. Sala, and Steven R. Archer. "Response of dominant grass and shrub species to water manipulation: an ecophysiological basis for shrub invasion in a Chihuahuan Desert Grassland." Oecologia 169, no. 2 (2012): 373-383.

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Id:https://ror.org/0330j0z60
Creators:
Individual: Heather Throop
Organization:Arizona State University
Id:https://orcid.org/0000-0002-7963-4342
Individual: Steven Archer
Organization:The University of Arizona
Id:https://orcid.org/0000-0002-5539-4129
Individual: Lara Reichmann
Organization:Arizona State University
Id:https://orcid.org/0000-0002-9737-7300
Individual: Osvaldo E Sala
Organization:Arizona State University
Id:https://orcid.org/0000-0003-0142-9450
Contacts:
Organization:Jornada Basin LTER
Position:Jornada Basin LTER Information Manager
Address:
P.O. Box 30003, MSC 3JER New Mexico State University,
Las Cruces, NM 88003-8003 USA
Phone:
575-646-1739
Email Address:
jornada.data@nmsu.edu
Web Address:
https://lter.jornada.nmsu.edu/information-management/
Metadata Providers:
Organization:Jornada Basin LTER
Address:
P.O. Box 30003; MSC 3JER New Mexico State University,
Las Cruces, NM 88003-8003 USA
Web Address:
https://lter.jornada.nmsu.edu

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: Study occurred in the basin floor geomorphic zone in the Jornada Basin. More precise geographic coordinates for this study may be requested from the JRN LTER Data Manager (jornada.data@nmsu.edu).
Bounding Coordinates:
Northern:  32.749487Southern:  32.473173
Western:  -106.872883Eastern:  -106.692716

Project

Parent Project Information:

Title:Jornada Basin LTER
Personnel:
Individual:Dr. Debra Peters
Address:
P.O. Box 30003, MSC 3JER,
New Mexico State University,
Las Cruces, NM 88003-8003 United States
Phone:
575-646-1739 (voice)
Email Address:
jornada.lter@nmsu.edu
Role:Principal Investigator
Abstract:

The Jornada Basin Long-Term Ecological Research (LTER) program is part of a national network of long-term ecological research sites funded by the US National Science Foundation (NSF). The Jornada LTER program has been continuously funded since 1982 to develop general principles governing changes between grassland and shrubland ecosystems based on long-term data collected in the Chihuahuan Desert. We translate our findings to dryland ecosystems around the world, and forecast the dynamics of future ecosystem states in response to changing climate and land use.

Funding:

At the time of this study, JRN was funded by the National Science Foundation under award DEB 0618120.

Maintenance

Maintenance:
Description:complete
Frequency:notPlanned
Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'mmol m-2 s-1'
        |     |     |     |  \___attribute 'constantToSI' = '0.001'
        |     |     |     |  \___attribute 'id' = 'millimolePerMeterSquaredPerSecond'
        |     |     |     |  \___attribute 'name' = 'millimolePerMeterSquaredPerSecond'
        |     |     |     |  \___attribute 'parentSI' = 'molePerMeterSquaredPerSecond'
        |     |     |     |  \___attribute 'unitType' = 'amountOfSubstanceAreaRate'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'millimoles per square meter per second\n'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'number'
        |     |     |     |  \___attribute 'name' = 'number'
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'a quantity or amount'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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