NPP reference harvest data : Data entry program, File Format: BINARY, File Type: MS QuickBasic 4.5 executable

Metadata:

• Identification_Information
• Data_Quality_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Jornada Basin LTER

Originator: Huenneke, Laura

Publication_Date: 2005

Title:

NPP reference harvest data : Data entry program, File Format: BINARY, File Type: MS QuickBasic 4.5 executable

Geospatial_Data_Presentation_Form: entity

Series_Information:

Publication_Information:

Other_Citation_Details:

Contact info for data set originator: Jornada Basin LTER Address:NMSU, Wooton Hall, Room 2002995 Knox Street, Room 200Box 30003, MSC 3JERLas CrucesNM88003 Phone:(505) 646-7918 Email address:datamanager@jornada.nmsu.edu Contact info for data set originator: Huenneke, Laura Address:Dean, College of Arts & Sciences Flagstaff, AZ 86011-5621 Phone:928-523-0516 Email address:Laura.Huenneke@nau.edu

Online_Linkage:

http://jornada-www.nmsu.edu/datacat.htm

Description:

Abstract:

Deserts and semi-deserts are characterized as ecosystems of low primary productivity, but a more pertinent trait is the variability of plant production in space and time. In dryland ecosystems there are usually some locations on the landscape (e.g., sites receiving run-on moisture from adjacent areas) and some time periods where plant growth is lush in response to temporary favorable conditions. Our objective in monitoring net primary production, therefore, is to understand the temporal and spatial patterns of production within ecosystems as well as to characterize the relative productivity of various ecosystems. Our chief questions pertain to the impact of desertification (shrub encroachment in former semi-arid grasslands) on patterns of production. First, can we detect significant differences in productivity between shrub-dominated and grass-dominated systems? Second, given our evidence for greater spatial heterogeneity in soil resources at the plant scale in shrub systems, how does the spatial heterogeneity of aboveground production compare among ecosystems? Finally, how do seasonal and interannual patterns of plant production response to climate vary among ecosystems? Our methodology for measuring aboveground net primary production has been adopted to allow explicit comparison of production among ecosystems of different structure and to facilitate assessment of spatial variation. We have designed a non-destructive method that samples vegetation of different structures with consistent methodology and intensity of sampling, and that allows the quantification of NPP for particular unit areas such that one can characterize spatial patterns in NPP. In early 1989 grids of permanent 1 m2 quadrats were established in 15 sites: 3 each in Larrea shrubland, Bouteloua eriopoda grassland, Prosopis dune systems, Flourensia cernua alluvial flats, and grass-dominated dry lakes or playas. Sites were selected to represent the range of biomass and vegetation structure within each ecosystem type, rather than randomly selected among sites of that ecosystem type in the basin (Figure 1). Aboveground biomass is estimated for every species in 49 quadrats per site, three times per year, using non-destructive measures of plant size and applying regressions based on harvests from adjoining areas. These data provide quantitative measures of the abundance of all vascular plant species at each site every season. Productivity over an interval for a quadrat is estimated as the sum of all positive increments of biomass for all species in that quadrat. At each of the 15 sites we are also measuring soil moisture (via neutron probe) monthly. Rain gauges at each site provide localized precipitation data to accompany weather data from the central meteorological station.

This is part of a multi-part data set.

Purpose: N/A

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates_Times:

Beginning_Date: 1989-04-25

Currentness_Reference: as it was at time of compilation

Status:

Progress: Complete

Maintenance_and_Update_Frequency:

Frequency of MeasurementWinter, spring, and fall of each yearMetadata History LogData set title - NPP reference harvest dataData set file name - NPPHARV.DSD----------------------------------------------------------------mm/dd/yyyy - Date of CommentInt - Initials of person making CommentJPA = John P. AndersonJL = Jim LenzLH = Laura HuennekeKR = Ken RamseyChanges/Updates - List any changes made to documentmm/dd/yyyy Int Changes/Updates---------- --- -----------------------------------------------06/15/1990 JPA Form completed by investigator02/25/1997 JPA Converted data set document file to new format.10/28/1997 JPA Added 1997 data file.08/12/1998 JPA Added 1998 data file.01/31/2000 JPA Added 1999 data file.08/25/2000 JPA Added 2000 data file.06/13/2002 JL Added Dataset ID and Project ID sections.07/01/2003 JPA Unrestricted as per LH.03/01/2004 KR Changed format for Attributes and AssociatedFiles section.Moved Dataset and Project IDs to top of form.Removed Missing/Questionable data section andincorporated into Attributes section.Updated Associated Files section.-------------------------------------------------------------------Data History Log

Spatial_Domain:

Description_of_Geographic_Extent: Jornada Basin,Chihuahuan Desert, 17 miles NE of Las Cruces, NM, USA

Bounding_Coordinates:

West_Bounding_Coordinate: -107.002148

East_Bounding_Coordinate: -106.502641

North_Bounding_Coordinate: 32.831393

South_Bounding_Coordinate: 32.428919

Bounding_Altitudes:

Altitude_Minimum: 1188

almax: 2658

Altitude_Distance_Units: meter

Keywords:

Place:

Place_Keyword_Thesaurus: N/A

Place_Keyword: Chihuahuan Desert

Place:

Place_Keyword_Thesaurus: N/A

Place_Keyword: Las Cruces

Place:

Place_Keyword_Thesaurus: N/A

Place_Keyword: NM

Place:

Place_Keyword_Thesaurus: N/A

Place_Keyword: Southwest USA

Place:

Place_Keyword_Thesaurus: N/A

Place_Keyword: Dona Ana County

Theme:

Theme_Keyword_Thesaurus: N/A

Theme_Keyword: JRN

Theme:

Theme_Keyword_Thesaurus: N/A

Theme_Keyword: Jornada Basin LTER

Theme:

Theme_Keyword_Thesaurus: N/A

Theme_Keyword: LTER

Theme:

Theme_Keyword_Thesaurus: N/A

Theme_Keyword: canopy cover

Theme:

Theme_Keyword_Thesaurus: N/A

Theme_Keyword: plant species

Theme:

Theme_Keyword_Thesaurus: N/A

Theme_Keyword: vegetation

Access_Constraints:

Allow all to users: uid=JRN,o=lter,dc=ecoinformatics,dc=org

Allow read to users: public

Use_Constraints:

Data Use and Acknowledgement StatementThis dataset is released to the public and may be used for academic, educational, or commercial purposes subject to the following:ObjectivesThe Jornada Basin LTER Information Management System provides protocol and services for data collection, verification, organization, archives, and distribution.Quality Assurance StatementData 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 long-term 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. The data manager helps researchers to construct data forms that allow convenient data entry and analysis. Data documentation forms are completed by principal investigators prior to data entry. Data are entered into computer data files by data entry personnel using programs that error- check and verify the data as it is entered. Computer files are subjected to further verification by graphing and/or error-checking programs, and/or examination by field investigators. Error-checked data files are stored with associated documentation files on floppy disks and on a hard-disk database. Back-up data files are maintained as "hard-copy," on multiple floppy disks, and on read/write 30- year magneto-optical disks. Various sets of these data are stored at different sites on the NMSU 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 management staff will provide copies of data and documentation submitted by a principal investigator to that investigator upon request.Policy on Submission of DataAll data collected during a calendar year should be submitted to the Jornada Basin LTER data manager prior to July first of the following year. Data must be submitted with standard Jornada Basin LTER forms (both Project Abstract and Data Set documentation) which include objectives of the study, methods, as well as format and content of the data.Data Access PolicyData 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.Data Acknowledgement PolicyIndividuals 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) projects. Funding for these data was provided by the U.S. National Science Foundation (Grants DEB-92-40261 and DEB 94-11971). 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

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NMSU, Wooton Hall, Room 200

Contact_Person: Data Manager

Contact_Position: Data Manager

Address_Type: Mailing

Contact_Address:

Address: NMSU, Wooton Hall, Room 200

Address: 2995 Knox Street, Room 200

Address: Box 30003, MSC 3JER

City: Las Cruces

State_or_Province: NM

Postal_Code: 88003

Contact_Voice_Telephone: (505) 646-7918

Contact_Facsimile_Telephone: (505) 646-5889

Contact_Electronic_Mail_Address: datamanager@jornada.nmsu.edu

Data_Set_Credit:

Anderson, John

position name:Researcher

Lightfoot, David

position name:Researcher

Huenneke, Laura

position name:Researcher

Sandell, Cathie

position name:Researcher

Forbes, Greg

position name:Researcher

Data_Quality_Information:

Logical_Consistency_Report:

Treatment of DataAnalysis of the harvest data proceeds by buildinglinear regressions of plant biomass versus volume. SASprograms are used to calculate these regressions. In thefirst few sample dates, field observations were notconsistent, and volume had to be calculated from height anddiameter measurements (rather than height and cover) forsome species. DWCOV SAS (sample listing attached) wasmodified and run for each particular species (inserting theappropriate 4-letter acronym). [When diameter, rather thancover, was measured for a species, the program, DWDIACOV SAScalculated those regressions.] More recently, DWREGALL SAS(listing attached) was used to calculate the regressions forall species in a single step, rather than having to rerunthe program for each species individually. These programsread in the SAS data set created above, sort the data byzone and site, and calculate volumes for each occurrence ofthe species (volume = cover*height*100). They test forsignificant differences in the regression among sites(significance given by F-test of site*vol interaction term);they then calculate a regression of biomass versus volumefor all occurrences pooled, and then separate regressionsfor each site. After each run of the SAS programs, one mustask for a printed copy of the listing; there is no outputfile or other permanent record. The linear regression isrestricted to force the intercept through zero; in the rarecase where such a regression will not work (occasionalnegative r squared values), the SAS program can be modifiedto remove that restriction. Hard copies of these regressionoutputs are saved; for each species, the best regression(s)are selected (either pooled or by site, either intercept = 0or not) and the slope parameter noted for use in analyzingquadrat data. These parameters are entered into theregression program used to analyze the quadrat data (seedocumentation for quadrat data).

Lineage:

Methodology:

methodtype: Method Type; field, lab, etc

methoddesc:

----------------------------------------------------------------Plant samples are harvested adjacent to permanent gridsas described in Research Project documentation, avoidingplants obviously damaged by livestock or by previousharvests, or otherwise unrepresentative of plants withinpermanent quadrats. Dead biomass (other than that obviouslyproduced in current growth season) is removed and discarded;living material is dried and weighed to nearest 0.01 g.Data are entered from the data sheets into a PC data file,using a Fortran data entry program. The data file createdis named "NPPRyys.DAT" where yy = year of sample (e.g., 89for 1989) and s = season of sample (W for winter, S forspring, F for fall). This file is then uploaded to the IBMmainframe and its name maintained.These data files are checked by a SAS program, HARVTEST(listing attached), which checks for duplicate observationnumbers and for observations with missing cover, height, orweight values. The harvest data files are usually storedtemporarily as SAS data sets, which are the basis forfurther analysis, but which are not maintained as permanentfiles.

Process_Step:

Process_Description: Read Methods description above if applies

Process_Date: Read method descriptions if applicable

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: HRVCONFG.EXE

Entity_Type_Definition:

Data entry program, File Format: BINARY, File Type: MS QuickBasic 4.5 executable

Entity_Type_Definition_Source: N/A

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Jornada Basin LTER

Contact_Address:

Address_Type: mailing

Address: NMSU, Wooton Hall, Room 200

City: Las Cruces

State_or_Province: N/A

Postal_Code: 88003

Contact_Voice_Telephone: (505) 646-7918

Contact_Voice_Telephone: N/A

Contact_Facsimile_Telephone: (505) 646-5889

Contact_Electronic_Mail_Address: (505) 646-7918

Resource_Description: knb-lter-jrn.2002043.3

Distribution_Liability: distribution liability information is not available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Unknown; NOT ASCII

ASCII_File_Structure:

Record_Delimiter: N/A

Number_Header_Lines: N/A

Orientation: columnmajor

Case_Sensitive: N/A

Authentication: N/A

Quote_Character: N/A

Data_Field:

Data_Field_Name:

Field Name data is included as part of the Entity/Attribute element (eainfo).

Data_Field_Width_Delimiter: N/A

Format_Information_Content: See Entity/Attribute element (eainfo)

File_Decompression_Technique: No compression applied

Transfer_Size: N/A

Digital_Transfer_Option:

Offline_Option:

Offline_Media: N/A

Recording_Capacity: N/A

Recording_Format:

Recording_Density: N/A

Recording_Density_Units: N/A

Recording_Format: N/A

Fees: N/A

Metadata_Reference_Information:

Metadata_Date: 2005

Metadata_Review_Date: N/A

Metadata_Future_Review_Date: N/A

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Jornada Basin LTER

Contact_Address:

Address_Type: mailing

Address: NMSU, Wooton Hall, Room 200

City: Las Cruces

State_or_Province: N/A

Postal_Code: 88003

Contact_Voice_Telephone: (505) 646-7918

Contact_Facsimile_Telephone: (505) 646-5889

Contact_Electronic_Mail_Address: datamanager@jornada.nmsu.edu

Metadata_Standard_Name:

FGDC/NBII Content Standard for Digital Geospatial Metadata (from Ecological Metadata Langualge 2.0)

Metadata_Standard_Version: 1999 Version (from Ecological Metadata Langualge 2.0.1)

Metadata_Extensions: