+--------------------------------------------------------------------------------------------------+ | Jornada Information Managment System | | Project Documentation Form | +--------------------------------------------------------------------------------------------------+ | All Jornada Basin LTER (NSF/NMSU) and Jornada Experimental Range (USDA/ARS) research projects | | must be documented on the following form. All research projects under the auspices of the | | Jornada Basin LTER (NSF/NMSU) and Jornada Experimental Range (USDA/ARS) will be described by the | | following standardized form. Information that is not available at this time, must be included | | when it becomes available. In addition, associated data sets must also be described on Dataset | | Documentation Forms and all attributes collected for each data set must also be described on an | | Attribute Documentation Form. All forms are available online at http://jornada-www.nmsu.edu and | | from the data manager. See data manager for any questions regarding this form. | +--------------------------------------------------------------------------------------------------+ 1) Project title: -------------- Valentine's Creosotebush Lagomorph Study 2) Responsible investigator: ------------------------- Kris Havstad 3) Date research commenced (mm/dd/yyyy): ------------------------------------- 08/01/1938 4) Date research terminated (mm/dd/yyyy): -------------------------------------- ONGOING 5) PI funding the research: ------------------------ 01/01/1989 - ONGOING Kris Havstad, USDA-ARS Jornada Experimental Range 6) Additional investigator(s): --------------------------- 10/01/2000 - ONGOING Deb Peters 7) Funding agency (ex. NSF, USDA): ------------------------------- USDA/ARS, NSF 8) Funding cycle (Ex. LTER II, N/A): --------------------------------- N/A 9) Informative abstract (Describe research project completely. Include project OBJECTIVES/HYPOTHESIS.) ---------------------------------------------------------------- Three exclosure sites each with sixteen 21.3 x 21.3 m plots were established in 1938/39 to evaluate the effects of lagomorph exclusion and shrub removal in a creosotebush dominated community. The study sites, developed by Ken Valentine, were placed on the Jornada Experimental Range at the following locations: 1) outside the southeast corner of the Gravelly Ridges Artificial Revegetation Enclosure, 2) about one half mile southwest of Parker Tank, and 3) inside the Moisture Conservation Plots Enclosure about .15 mile east of the Dona Ana Revegetation Enclosure. Major dominant shrubs (creosotebush, mesquite, and tarbush) were individually severed at ground level and removed by hand in 1939, 1947, 1956, 1960, 1967, 1989, 1995, and 2001. Lagomorphs were excluded with poultry wire fencing in 1939 and integrity of fences is maintained. The objective of the original study was perennial grass responses to shrub removal, lagomorph exclusion, furrowing (shallow, hand raked furrows designed to trap surface water), and seeding (broadcast application of seeds of native perennials). Furrowing and seeding treatments were short lived and not repeated or maintained. All plots were sampled prior to initial treatment applications in 1938/39 and immediately following all subsequent shrub removal events. Each plot was divided into east and west halves and 14 randomly located 10.65 m line intercept transects were sampled for shrub canopy cover and perennial grass basal cover. 10) Data set(s) associated with project: ---------------------------------------------------------------- Documentation Data set name file name ------------------------------------------------- ------------- Line Intercept Data of Long-term Vegetation VCLSUSDA.DSD Responses to Shrub Removal and Lagomorph Exclusion in a Creosotebush Community Photos from Shrub Removal and Lagomorph Exclusion VCLSPHOT.DSD in a Creosotebush Community 11) Publications resulting from project research: ---------------------------------------------------------------- Gibbens, R. P., K. M. Havstad, D. D. Billheimer, and C. H. Herbel. 1993. Creosotebush vegetation after 50 years of lagomorph exclusion. Oecologia 94: 210-217. Havstad, K.M., R.P. Gibbens, C.A. Knorr, and L.W. Murray. 1999. Long-term influences of shrub removal and lagomorph exclusion on Chihuahuan Desert vegetation dynamics. Journal of Arid Environments 42:155-166. Peters, D.P.C., I. Mariotto, K.M. Havstad, and L.W. Murray. Spatial variation in remnant grasses after a grassland to shrubland state change: implications for restoration. Journal of Range Management (in review). 12) Comments (Include any comments that here that more full describe this project): ---------------------------------------------------------------- 12/7/2005 Valerie LaPlante. This project is referred to by other titles: Gravelly Ridges Exclosure Study, Lagomorph and Shrub Removal, Creosotebush Studies (which included data from Parker Tank plots and Dona Ana Revegetation Enclosure plots). 11/11/2005 John Anderson. Documentation is still being completed for "VCLSPHOT.DSD" and is not currently available. 13) Project file history log: ---------------------------------------------------------------- Project title - Valentine's Creosotebush Lagomorph Study Project file name - VCLSUSDA.PRJ ------------------------------------------------------------- mm/dd/yyyy - Date of comment (month/day/year) Int - Initials of person making comment JPA = John P. Anderson JL = Jim Lenz Changes/Updates - List any changes made to document mm/dd/yyyy Int Changes/Updates ---------- --- ----------------------------------------------- 01/28/1997 JPA Project documentation completed by investigator. 04/09/1997 JPA Converted project document file to new format. 06/13/2002 JL Added Dataset ID and Project ID sections. 01/11/2006 JPA Changed project title from "Gravelly Ridges Exclusion Study" to "Valentine's Creosotebush Lagomorph Study" as per Valerie LaPlante of JER. 01/11/2006 JPA Changed project file name from GRESUSDA.PRJ to VCLSUSDA.PRJ 01/11/2006 JPA Informatin abstract updated per Valerie LaPlante 01/11/2006 JPA Changed data set title and file name from "USDA-ARS GRES line intercept data""GRESUSDA.DSD" to "Line Intercept Data of Long-term Vegetation Responses to Shrub Removal and Lagomorph Exclusion in a Creosotebush Community""VCLSUSDA.DSD" 01/11/2006 JPA Added dataset documentation file for photos 01/11/2006 JPA Updated citations of publications resulting from research. 14) Project ID: ----------- PRU0020001 ---------------------------------------------------------------- END OF PROJECT FILE ----------------------------------------------------------------