+------------------------------------------------------------------+ | JORNADA LTER | | New Mexico State University | | Data Set Documentation Form | +------------------------------------------------------------------+ All Jornada Desert Site NSF/LTER data sets must be documented on the following form. This applies to any data set intended for permanent archiving. All raw data sets collected under the auspices of the Jornada NSF/LTER Program will be described by the following standardized form. Information that is not available at this time, must be included when available. See data manager for any questions regarding this form. -------------------------------------------------------------------- Dataset ID: DSL2005016 Project ID: PRL2005011 1) Data set access (RESTRICTED or UNRESTRICTED): ------------------------------------------------------------------------- UNRESTRICTED 2) Data set title: ------------------------------------------------------------------------- Arthropod Trophic Group Composition Data 3) Project title: ------------------------------------------------------------------------- Arthropod Species Composition from LVAR Creosotebush Study 4) Responsible investigator(s): ------------------------------------------------------------------------- D.C. Lightfoot, Apr1985-Apr1986 5) Date data collection commenced (mm/dd/yyyy): ------------------------------------------------------------------------- 04/01/1985 6) Date data collection terminated (mm/dd/yyyy or ONGOING): ------------------------------------------------------------------------- 04/01/1986 7) Expected duration of study: ------------------------------------------------------------------------- two years 8) Frequency of measurement: ------------------------------------------------------------------------- once per year 9) Researchers: (Personnel who will be obtaining data and who would need to be contacted directly if there is a problem in the raw data): ------------------------------------------------------------------------- D.C. Lightfoot, Apr1985-Apr1986 10) Methods of recording (field data sheets, instrumental, etc.): ------------------------------------------------------------------------- data sheets 11) Site location (Describe in sufficient detail that the site can be relocated): ------------------------------------------------------------------------- *The plots, approximately 1 ha each and designated A through E, were selected randomly from a 1.0 by 0.5 km area within a creosotbush stand situated on a gradually sloping east-facing alluvial slope below the Dona Ana mountains. Creosotebush was the dominant shrub in the area, associated with less abundant subshrubs and a variety of small annual forbs. (These five plots were randomly located between Whitford's upper storage trailer and old LTWN plots.) 12) Data set description (State the hypothesis and / or objectives which collection of data set addresses): ------------------------------------------------------------------------- *We conducted a field study to test the hypothesis that creosotebush (Larrea tridentata) shrubs growing in naturally nutrient-rich sites had better quality foliage and supported greater populations of foliage arthropods than shrubs growing in nutrient-poor sites. This is data for foliage arthropods sampled from LVAR creosotebush shrubs. Sampling was done in April of 1985 and 1986. Shrubs were sampled from 5 separate sites designated A-E. 10 shrubs of 3 different types, R=random, H=high quality, L=low quality were sampled at each site. Total numbers of taxa and individuals of each major trophic group, herbivores, predators, omnivores, from each of the 30 shrubs/site are listed. 13) Attributes measured: ------------------------------------------------------------------------- Variable Name example: AIRMAX Name used in data set header. Variable Format example: C = character (C3: Three characters [XXX]) I = integer (I2: Integer with two places [##]) F = floating point (F4.2: Total places with decimal point = 4, with 2 decimal places. [#.##]) Variable Mask example: mm/dd/yyyy Date where mm=month, dd=day, yyyy=year Exception Value Codes format: [code] = [description] example: 'Q' = questionable data Code = code (surrounded by single quotes) Note: Equal signs (=) are used to separate code and description. Note: Enter multiple Exception Value Codes on separate lines. Acceptable Value Type examples: defined list undefined list range defined list of ranges undefined list of ranges complex external list Acceptable Value Codes format: [code] = [description] example: C = Creosotebush Code = code Note: Equal signs (=) are used to separate code and description. Note: Enter multiple Exception Value Codes on separate lines. Note: Equal signs (=) are used to separate values and commas (,) are used to separate multiple value sets. Ranges of acceptable values are separated by a dashes. Lists of acceptable values are separated by commas. Asterick symbols (*) are reserved to indicate external lookup file listing. ------------------------------------------------------------------------- variable name: DATE attribute description: Year (ie. 86 = 1986) measured units: N/A start column position: 1 variable format: I2 variable mask: N/A exception value codes: N/A acceptable value type: N/A acceptable value codes: N/A variable name: PLOT attribute description: Plot Id measured units: N/A start column position: 6 variable format: C1 variable mask: N/A exception value codes: N/A acceptable value type: range acceptable value codes: A-E variable name: TYPE attribute description: Shrub type measured units: N/A start column position: 11 variable format: C1 variable mask: N/A exception value codes: N/A acceptable value type: defined list acceptable value codes: R = Random Shrub H = High-Quality Shrub L = Low-Quality Shrub variable name: SHRUB# attribute description: Shrub number measured units: N/A start column position: 16 variable format: I2 variable mask: N/A exception value codes: N/A acceptable value type: range acceptable value codes: 1-10 variable name: CHEWTAX attribute description: Number of Chewing arthropod taxa per shrub (herbivores) measured units: N/A start column position: 24 variable format: I2 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: CHEW# attribute description: Number of Chewing arthropod individuals per shrub (herbivores) measured units: N/A start column position: 32 variable format: I2 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: SUCKTAX attribute description: Number of sucking arthropod taxa per shrub (herbivores) measured units: N/A start column position: 40 variable format: I2 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: SUCK# attribute description: Number of sucking arthropod individuals per shrub (herbivores) measured units: N/A start column position: 48 variable format: I3 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: PREDTAX attribute description: Number of predatious arthropod taxa per shrub measured units: N/A start column position: 56 variable format: I2 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: PRED# attribute description: Number of predatious arthropod individuals per shrub measured units: N/A start column position: 64 variable format: I2 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: OMNITAX attribute description: Number of omnivorous arthropod taxa per shrub measured units: N/A start column position: 72 variable format: I1 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A variable name: OMNI# attribute description: Number of omnivorous arthropod individuals per shrub measured units: N/A start column position: 80 variable format: I2 variable mask: N/A exception value codes: . = Missing values acceptable value type: N/A acceptable value codes: N/A 14) Methodology (Provide sufficient detail such that an unaware reader could repeat the described data collection procedures.) ------------------------------------------------------------------------- *Thirty shrub were selected for sampling from each of the five plots. To test for differences in foliage characteristics and arthropod densities between nutrient-rich and nutrient-poor shrubs, we selected 10 high nutrient shrubs and 10 low nutrient shrubs in each plot. Shrub nutrient status was determined on the basis of the relative size of leaf litter accumulations on the ground beneath shrub canopies. Ten shrubs were selected at random from each plot prior to selecting different type shrubs, to provide us with measures of natural variablity of shrub characteristics and foliage arthropods. Foliage arthropods were sampled form each of the 150 shrubs on May 2, 1986. Three branches were selected randomly from each shrub and shaken into an insect sweep net. A consistent-sized branch of 50 cm in length was sampled each time to provide a standardized sample from each shrub, regardless of shrub size. The contents of three branch samples per shrub were combined into one zip-lock plastic storage bag and taken to the lab, frozen, and later sorted. Field sampling was done in the morning at sunrise. As in our previous work, we classified arthropods into trophic groups, or guilds of taxa that had simliar morphological feeding mechanisms and fed on similar food resources. 15) Key literature (Citations that describe sampling procedures, [reference of a published paper, thesis, etc.]): ------------------------------------------------------------------------- Lightfoot, David C., and Walter G. Whitford. 1989. Interplant variation in creosotebush foliage characteristics and canopy arthropods. Oecologia 81: 166-75. 16) Keywords (keywords that describe data set; maximum of 10): ------------------------------------------------------------------------- Creosotebush, Larrea tridentata, foliage arthropods, phytophagous insects, plant-insect interactions, guild, trophic groups, herbivores, predators, omnivores 17) Treatment of data: (List any programs used in analysis of the data): [Note: Programs should be appended and stored with this form.] ------------------------------------------------------------------------- 18) Associated computer accounts: ------------------------------------------------------------------------- 19) Files associated with this data set: ------------------------------------------------------------------------- File Type Codes: Type Code Definition ---- ---------- MD Metadata files DS Data files DE Data entry, verification, and analysis files OT Other (Any other related files) File Format Codes: ASCII, BINARY ------Metadata files------------------------------------ file type: MD file name: LARARTH.PRJ description: Project file documention file format: Text file format type: ASCII file type: MD file name: LTROPHIC.DSD description: Data documentation file file format: Text file format type: ASCII ------Data files---------------------------------------- file type: DS file name: LTROPHIC.DAT description: Arthropod trophic group composition data file format: Text file format type: ASCII ------Data entry, verification, and analysis files------ ------Other (Any other related files)------------------- file type: OT file name: LTRO.DOC description: Original data documentation file format: Wordstar format type: BINARY file type: OT file name: LTRO.WS description: Original data documentation file format: Text file format type: ASCII 20) Comments (Include any comments here that more fully describe this data set): ------------------------------------------------------------------------- *Taken from Lighfoot and Whitford (1989); see key literature. 21) Data set documentation history log: ------------------------------------------------------------------------- Data set title - Arthropod trophic group composition data Data set file name - LTROPHIC.DSD ------------------------------------------------------------------------- mm/dd/yyyy - Date of Comment Int - Initials of person making Comment KJL = Kevin J. La Fleur JPA = John P. Anderson MAB = Michelle A. Buonopane KR = Ken Ramsey Changes/Updates - List any changes made to document mm/dd/yyyy Int Changes/Updates ---------- --- -------------------------------------------------------- 08/02/2002 MAB Updated documentation to new form. 07/19/2005 KR Added Dataset ID and Project ID to top of form. Changed format for Attributes and Associated Files section. Removed Missing/Questionable data section and incorporated into Attributes section. Changed format of Responsible Investigators and Researchers sections. ----------------------------------------------------------------------------- END OF DATA SET FILE -----------------------------------------------------------------------------