DSL2004001 NPPNEUT Jornada Basin LTER

NMSU, Wooton Hall, Room 200 2995 Knox Street, Room 200 Box 30003, MSC 3JER Las Cruces NM 88003

(505) 646-7918 (505) 646-5889 datamanager@jornada.nmsu.edu http://jornada-www.nmsu.edu ORG0000001 Ross A Virginia

unknown Responsible Investigator John Anderson Jornada Basin LTER

New Mexico State University Jornada Basin LTER Box 30003, MSC 3JER Las Cruces NM 88003-8003

505-646-5818 janderso@jornada.nmsu.edu Researcher Cathie I Sandell

unkown Researcher Chris M McGlone

unknown Researcher Nancy G Stotz

unknown Researcher Dan Santantonio

unknown Researcher David Lopes

unknown Researcher Sophia Gehlhausen

unknown Researcher English Once a month soil water content measurements are made at 10 depths (where possible) at each of 10 access tubes at each of the 15 LTER-II NPP sites using a neutron probe (Campbell Model 503DR Hydroprobe). Measurements are taken at 30cm, 60cm, 90cm, 120cm, 150cm, 180cm, 210cm, 240cm, 270cm, and 300cm when possible or to the greatest depth it was possible to install the access tubing before hitting a layer of impenetrable caliche. Converted water content values are a volume/volume relationship and represent cm3 water/cm3 soil. Two files per month are maintained: Raw count data (mmddyy-2.RAW; example 121189-2.RAW where mmddyy=month day year of reading and "2" indicates data is LTER-II NPP site neutron probe readings) and calculated/sorted data maintained in a file for each year (NPPSWCyr.DAT; example NPPSWC89.DAT for 1989 NPP soil water content data). Chihuahuan Desert Las Cruces NM Southwest USA Dona Ana County JRN Jornada Basin LTER LTER soil water content

This dataset is released to the public and may be used for academic, educational, or commercial purposes subject to the following:

The Jornada Basin LTER Information Management System provides protocol and services for data collection, verification, organization, archives, and distribution.

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 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.

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. 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 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.

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) 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

http://jornada-www.nmsu.edu/datacat.htm Jornada Basin,Chihuahuan Desert, 17 miles NE of Las Cruces, NM, USA -107.002148 -106.502641 32.831393 32.428919 1188 2658 meter 1989-07-05 ongoing Monthly

Monthly

Data set title - NPP Soil Water Content Raw DataData set file name - NPPNEUT.DSD----------------------------------------------------------------mm/dd/yyyy - Date of CommentInt - Initials of person making CommentJPA = John P. AndersonLFH = Laura F. HuennekeKR - Ken RamseyChanges/Updates - List any changes made to documentmm/dd/yyyy Int Changes/Updates---------- --- -----------------------------------------------12/17/1989 JPA Form completed by investigator.11/30/1994 JPA Expanded information for clarification.11/02/1995 JPA Rewrote Informative Abstract.03/03/1997 JPA Converted data set document file to new format.07/01/2003 JPA Changed to Unrestricted as per LFH.04/19/2004 KR Added Dataset ID and Project ID to top of form.Changed format for Attributes and AssociatedFiles section.Removed Missing/Questionable data section andincorporated into Attributes section.-------------------------------------------------------------------

Data Manager

NMSU, Wooton Hall, Room 200 2995 Knox Street, Room 200 Box 30003, MSC 3JER Las Cruces NM 88003

(505) 646-7918 (505) 646-5889 datamanager@jornada.nmsu.edu http://jornada-www.nmsu.edu Data Manager

NMSU, Wooton Hall, Room 200 2995 Knox Street, Room 200 Box 30003, MSC 3JER Las Cruces NM 88003

(505) 646-7918 (505) 646-5889 datamanager@jornada.nmsu.edu http://jornada-www.nmsu.edu Debra Peters

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

505 646 2777 505 646 5889 debpeter@nmsu.edu ORG0000001 ----------------------------------------------------------------Follow procedure in file NEUTRON.PRO, "PROCEDURE FORUSE OF CAMPBELL MODEL 503DR HYDROPROBE."

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Ross A Virginia

Responsible Investigator Wesley M Jarrell

Additional Investigator Once a month soil water content measurements are made at 10 depths (where possible) at each of 10 access tubes at each of the 15 LTER-II NPP sites using a neutron probe (Campbell Model 503DR Hydroprobe). Measurements are taken at 30cm, 60cm, 90cm, 120cm, 150cm, 180cm, 210cm, 240cm, 270cm, and 300cm when possible or to the greatest depth it was possible to install the access tubing before hitting a layer of impenetrable caliche. Converted water content values are a volume/volume relationship and represent cm3 water/cm3 soil. Two files per month are maintained: Raw count data (mmddyy-2.RAW; example 121189-2.RAW where mmddyy=month day year of reading and "2" indicates data is LTER-II NPP site neutron probe readings) and calculated/sorted data maintained in a file for each year (NPPSWCyr.DAT; example NPPSWC89.DAT for 1989 NPP soil water content data). Dr. Debra Peters

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

505 646 2777 PE00000002 Information Manager Historical Perspective: The Chihuahuan Desert , similar to many arid and semiarid ecosystems of the world, has experienced dramatic changes in vegetation structure and ecosystem processes over the past several centuries. The reasons for the expansion of woody plants and decrease in perennial grasses are numerous and controversial, including livestock grazing, drought, climate change, reduction in fire frequency, and change in small animal populations. The problem is further complicated by the existence of interactions among these factors that feature positive feedbacks and that create threshold behavior and nonlinearity in ecosystem responses. A general consensus does not exist regarding the key factors that control the desertification process or the conditions that explain varying patterns of shrub invasion or grass persistence under similar conditions. It is also unclear why many attempts to remediate shrublands back to grasslands have failed whereas some methods have worked well, but with long time lags. Site History: The Jornada Basin Long Term Ecological Research Program (JRN LTER), supported by major funding from the National Science Foundation, has been investigating desertification processes since 1982. We benefit from a legacy of long-term data available from 1912 onwards, thanks to collaboration with our research partner, the Jornada Experimental Range Agricultural Research Service (JER ARS). Significant progress has been made in understanding the causes and consequences of desertification, although important problems still remain. In particular, several key questions are unresolved, including (1) can we predict spatial and temporal variation in ecosystem properties related to desertification and grass recovery? (2) how do we integrate diverse observations about vegetation, climate, soils, hydrology, and animal populations to accomplish this prediction? This integration is the focus of current LTER studies. Research Topics: desertification; ecosystem indicators and vegetation dynamics; geomorphology and wind; ecohydrology; animal interactions; factors affecting primary production; animal-induced soil disturbances; direct and indirect consumer effects; vertebrate and invertebrate population dynamics; grazing effects on ecosystem structure and function; biodiversity and ecosystem. Jornada Basin Climate and Vegetation NSF Award DEB-0080412 description. uid=JRN,o=lter,dc=ecoinformatics,dc=org all public read <mmddyy-2.RAW> Data file <mmddyy-2.RAW> column 4 1 1 9 5 17 5 25 5 33 5 41 5 49 5 57 5 65 5 73 5 81 5 89 ID ID Access tube id number (Last 2 digits identify the 10 tubes at each NPP site numbered 1 thru 10: Odd # = between shrubs Even# = under shrubs First 2 digits identify zone and NPP site: 1=C GRAV, 2=C SAND, 3=C CALI, 4=G SUMM, 5=G BASN, 6=G IBPE, 7=P SMAL, 8=P COLL, 9=P TOBO, 10=T TAYL, 11=T EAST, 12=T WEST, 13=M NORT, 14=M RABB, 15=M WELL) Integer C C Calibration number (autogenerated, not used) Integer M10 M10 Count reading (# of thermalized neutrons recorded by probe) at 30 cm depth Integer M9 M9 Count reading (# of thermalized neutrons recorded by probe) at 60 cm depth Integer M8 M8 Count reading (# of thermalized neutrons recorded by probe) at 90 cm depth Integer M7 M7 Count reading (# of thermalized neutrons recorded by probe) at 120 cm depth Integer M6 M6 Count reading (# of thermalized neutrons recorded by probe) at 150 cm depth Integer M5 M5 Count reading (# of thermalized neutrons recorded by probe) at 180 cm depth Integer M4 M4 Count reading (# of thermalized neutrons recorded by probe) at 210 cm depth Integer M3 M3 Count reading (# of thermalized neutrons recorded by probe) at 240 cm depth Integer M2 M2 Count reading (# of thermalized neutrons recorded by probe) at 270 cm depth Integer M1 M1 Count reading (# of thermalized neutrons recorded by probe) at 300 cm depth Integer NEUTRON.DOC Neutron probe field procedure, File Format: BINARY, File Type: MS Word for Windows NEUTRON.DOC MS Word for Windows Other NEUTRON.PRO Neutron probe field procedure, File Format: ASCII, File Type: Text file NEUTRON.PRO ASCII Text file Other NPPNEUT.DSD Data set documentation, File Format: ASCII, File Type: Text file NPPNEUT.DSD ASCII Text file Metadata file NPPSWC.PRJ Project documentation, File Format: ASCII, File Type: Text file NPPSWC.PRJ ASCII Text file Metadata file PROBE.HIS Data set history log, File Format: ASCII, File Type: Text file PROBE.HIS ASCII Text file Metadata file