Data Package Metadata   View Summary

Biomass at Fertilized and Unfertilized Transects in a Grazing Exclosure in the Jornada Basin,1989

General Information
Data Package:
Local Identifier:knb-lter-jrn.210015001.55
Title:Biomass at Fertilized and Unfertilized Transects in a Grazing Exclosure in the Jornada Basin,1989
Abstract:

In the spring of 1982, as part of the establishment of the Jornada Long-Term Ecological Research site in southern New Mexico, a 135 ha portion of a 1500 ha, internally drained, watershed was exclosed from grazing by domestic livestock. Prior to exclosure the watershed, as well as the rest of the Jornada basin, had been moderately to heavily grazed for the past 100 years. Concurrent with grazing, the vegetation had undergone a dramatic change from desert grassland, with an almost continuous cover of C4 perennial grasses, to isolated patches of the original grassland in a mosaic with desert shrub dominated plant communities (Buffington and Herbel, 1965).  Three parallel transects (2.7 km in length) run from the middle of the College Playa up into the foot of Mt. Summerford. The Control transect is to the west, the Treatment transect is to the east side of the Control transect, and the Alternate Control is to the east of the Treatment transect. Each transect is 30 meters wide with a 45 meter buffer zone between each transect. The Treatment transect was treated annually until 1987 with NHNO3 in a concentration equal to 10g N/m2. The station markers occur at 30 meter intervals along each transect. Perpendicular to each transect and crossing at each station marker is the 30 meter plant line intercept transect. Biomass of annual and perennial forbs and grasses was obtained from a one meter quad selected at random just downslope from each of  6 5-meter segments of the 30 meter plant line transect located perpendicular to the transect station marker. Data presented here is for the control and treatment transects. This study is complete.

Short Name:JornadaStudy_015_transect_vegetation_biomass_data
Publication Date:2011-12-03
Language:English

Time Period
Begin:
1989-09-15
End:
1989-09-20

People and Organizations
Contact:Maurer, Greg  
Creator:Whitford, Walter 

Data Entities
Data Table Name:
data_JornadaStudy_015_transect_vegetation_biomass_data
Description:
Data file information for the following Jornada data set: Transect Vegetation Biomass
Detailed Metadata

Data Entities


Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210015001/55/4f6addcbfe175dc1adcdff8f51cb8816
Name:data_JornadaStudy_015_transect_vegetation_biomass_data
Description:Data file information for the following Jornada data set: Transect Vegetation Biomass
Number of Columns:7

Time Period
Begin:
1989-09-15
End:
1989-09-20

Table Structure
Object Name:JornadaStudy_015_transect_vegetation_biomass_data.csv
Size:19990
Text Format:
Number of Header Lines:31
Number of Foot Lines:0
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 variable_jornada_transect_vegetation_biomass_datevariable_jornada_transect_vegetation_biomass_transectvariable_jornada_transect_vegetation_biomass_stationvariable_jornada_transect_vegetation_biomass_quadvariable_jornada_transect_vegetation_biomass_sppvariable_jornada_transect_vegetation_biomass_weight_dryQuality Flag
Column Name:DATE  
Transect  
Station  
QUAD  
SPP  
Dry weight  
q_flag  
Definition:Date (m/dd/yy)Transect treatmentStation NumberQuadrat NumberSpecies CodeDry WeightQuality flag for dry weight [E = estimated value (>0 and <0.05), G = good value, M = missing value]
Storage Type:date  
string  
string  
string  
string  
  string  
Measurement Type:dateTimenominalnominalnominalnominalrationominal
Measurement Values Domain:
FormatMM/DD/YYYY
Precision
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeT
DefinitionFertilization
Source
Code Definition
CodeC
DefinitionControl
Source
DefinitionStation Number
DefinitionQuadrat Number
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code*
DefinitionSee plntalfa.lst @ https://jornada.nmsu.edu/jornada/species/lter-plants
Source
Unitgram
Precision0.1
Typereal
DefinitionQuality flag for dry weight [E = estimated value (>0 and <0.05), G = good value, M = missing value]
Missing Value Code:        
Code-
Explmissing
Code-
Explmissing
 
Accuracy Report:              
Accuracy Assessment:              
Coverage:              
Methods:              

Data Package Usage Rights

Data Policies

Objectives:
    The Jornada Basin LTER Information Management System (JIMS) provides protocol and services for data collection, verification, organization, archives, and distribution in accordance with recommendations and guidelines developed by the LTER Information Managers Committee (http://www.lternet.edu/data/netpolicy.html). 
Disclaimer:
    While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Jornada Basin LTER shall not be liable for damages resulting from any use or misinterpretation of data sets. 
Quality Assurance Policy:
    Data managers interact with researchers during the entire scientific process--from the initial planning of sampling designs and field data collection to archiving and distribution of data. The goal of data management is to build and maintain an archive of Jornada Basin LTER data files that are fully documented, error free, and organized in useful ways. Our protocol for data collection and processing seeks maximum interaction between researchers and data management personnel to avoid confusion and potential loss of data or problems with integrity of data; e.g., identification of historical site treatments that may impact a proposed study or incomplete data set variable descriptions. Site and Data Manager involvement begins during the Project Design phase with the completion of the Jornada Notification of Research form by the researcher prior to the start of work; this alerts both Site and Data Manager to the new study and potential LTER data sets. Upon initiation of a new study, the researcher completes Project Documentation that provides the second level of "metadata" documentation.

    In the Data Collection phase, the data manager helps researchers design field and laboratory data sheets that facilitate data entry and analysis. Prior to JIMS data entry the investigator completes Data Set Documentation to provide the metadata that fully describe the data set. Both Project and Data set documentation are provided with the data set when it is requested or obtained from our Web site. JIMS data entry programs error-check and verify data as they are entered. Computer files are subjected to further verification by graphing and/or error-checking programs, and/or examination by field investigators. Final quality assurance of the data rests with the investigator who submits data for inclusion in the Data Management System. Direct communication with the Site Manager, or through a collaborating JRN P.I., is used to encourage the timely submission of documentation and of data by researchers.

    Error-checked data files are stored with associated documentation files on the file server. Archived data files are maintained in ASCII format on 30-yr magneto-optical (MO) disks, portable hard drives, CD-R media, and DVD media to guard against loss of data access that can result from changing technology. This may also include proprietary binary format files to facilitate recovery of working versions. Image data are archived on 8mm tape. Routine tape data backups of the file server are done daily, weekly, and monthly. One set of off-site copies are maintained elsewhere on the NMSU campus of routine backup tapes, MO disks, CD disks, and DVD disks with a second set of MO, CD and DVD disks maintained off-campus in case of a catastrophe on campus. The final responsibility for quality assurance (both in data and documentation content) rests with the principal investigator who submits the data for inclusion in the Jornada Basin LTER Information Management System. To facilitate quality assurance, the data manag ement staff will provide copies of data and documentation submitted by a principal investigator to that investigator upon request.

    The final responsibility for quality assurance (both in data and documentation content) rests with the principal investigator who submits the data for inclusion in the Jornada Basin LTER Information Management System. To facilitate quality assurance, the data management staff will provide copies of data and documentation submitted by a principal investigator to that investigator upon request.
Policy on Submission of data:
    Data submission into JIMS is expected from LTER researchers, LTER collaborators, and their graduate students where data and information is derived from publicly funded research in the U.S. LTER Network, totally or partially from LTER funds from NSF, Institutional Cost-Share, or Partner Agency or Institution where a formal memorandum of understanding with LTER has been established. Other Jornada Basin researchers are encouraged to submit their documented data for inclusion within JIMS to provide them with an archived backup, ensure its longevity, and provide online access to encourage synthesis efforts. Minimally, for non-LTER associated researchers, we request that publications be provided of research conducted on the Jornada Basin.

    Initial documentation for a data set must be submitted to the Jornada Basin LTER data manager within 90 days of initiation of data collection. Documentation forms are available at http://jornada-www.nmsu.edu/site/dm/readme.php . These consist of Project Abstract and Data Set and Attribute documentation forms, which include objectives of the study, methods, as well as format and content of the data. All data collected during a calendar year should be submitted to the Jornada Basin LTER data manager prior to July first of the following year. First time data submissions must be submitted with updated standard Jornada Basin LTER forms previously submitted.
Data Access Policy:
    Data will be made publicly available no later than 2 years after submission of the data unless an earlier date is specified by the principal investigator. In the event that an extension of the 2 year period is necessary, the principal investigator may petition the Jornada Basin LTER Executive Committee for a longer protected period. Graduate student research data will be available online after degree completion and they have the opportunity to publish their research. 
Policies for re-use, distribution, or the production of derivatives:
    Data re-use, distribution and production of derivative products are governed by the LTER Network data policies (http://www.lternet.edu/data/netpolicy.html) in the spirit of having the potential to increase communication, collaboration and synthesis within and among disciplines. Appropriate citation, acknowledgement, notification and collaboration are outlined and recommended. No commercial redistribution of data and derived products are allowed.
Data Acknowledgment Policy:
    Please send notification to the Information Manager (datamanager@jornada-vmail.nmsu.edu) and Responsible Investigator(s) of the data sets you are downloading and your intended use. 
    Individuals and institutions utilizing data from the Jornada Basin LTER database are requested to place the following acknowledgment in any publication in which these data are mentioned:

        Data sets were provided by the Jornada Basin Long-Term Ecological Research (LTER) project. Funding for these data was provided by the U.S. National Science Foundation (Grant DEB-0618210).

    Please send 1 copy of any publication that cites Jornada Basin LTER data to:

         John P. Anderson
         Jornada Experimental Range
         P.O. Box 30003, MSC 3JER
         New Mexico State University
         Las Cruces, NM 88003-0003

Keywords

By Thesaurus:
Research NetworksLTAR, LTER
LTER Core AreasPopulations
Jornada Data CategoryPlant
Jornada Dataset Keywordsforbs, transects, biomass, grasses
Dataset Statuscompleted

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:

The Treatment transect was treated annually until 1987 with NHNO3 in a concentration equal to 10g N/m2. The control transect was not treated.  The station markers occur at 30 meter intervals along each transect.There are 91 stations on each of the 3 2.7 km transects. Perpendicular to each transect and crossing at each station marker is a 30 meter plant line intercept transect. This extends 15 meters on either side of the station marker. The ends of the plant line intercept transect are marked by short rebar sticking up about 6 inches aboveground. The plant line intercept transects are thus perpendicular to the direction of major drainage flow. Biomass of annual and perennial forbs and grasses was obtained from a one meter quad selected at random just downslope from each of the 6 5-meter segments of the 30 meter plant line transects.
Data is recorded by identifying Station number (metal tag is located on fence post) and Segment number corresponding to those of the 30 meter plant line intercept running perpendicular to the main transect and station marker. The 5-meter segments are numbered 1 through 6 beginning at the west end of the line (right end if facing upslope). Biomass quads were located just downslope of the line intercept segments. One 1-meter section of the 5-meter segment was selected randomly for the 1-meter quadrat. Both annual and perennial forbs and grasses were measured using biomass removals.

People and Organizations

Publishers:
Organization:Jornada Basin LTER
Web Address:
http://jornada.nmsu.edu/lter
Creators:
Individual: Walter Whitford
Contacts:
Individual: Greg Maurer

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
1989-09-15
End:
1989-09-20
Sampling Site: 
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/).
Site Coordinates:
Longitude (degree): -106.740997314453Latitude (degree): 32.617000579834
Altitude (meter):1315

Temporal, Geographic and/or Taxonomic information that applies to Data Table: data_JornadaStudy_015_transect_vegetation_biomass_data


Time Period
Begin:
1989-09-15
End:
1989-09-20

Project

Maintenance

Maintenance:
Description:

Data was collected one time. This study is complete.

Frequency:

Additional Info

Additional Information:
 

The exclosure lies along a northeast facing piedmont slope at the base of a steep isolated mountain peak, and covers a variety of component landforms from the foot of the mountain to the basin floor. The northeast side of the exclosure is immediately upslope of the College Playa located near the NMSU College Ranch.

Other Metadata

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

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