Jornada Data Catalog
Last update: 08/14/2007
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Animal Projects
- Project documentation:
Animal Transects
Abstract: Population densities of rabbits and bird census in various habitats over
a series of years.
Data Set
- Data set documentation:
Animal transect -
 (30KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: birds, rabbits, lizards, animals, consumers, populations
Abstract: Population densities of rabbits and bird census in various habitats over
a series of years.
- Project documentation:
Effects of harvester ant nests on soil properties and vegetation
Abstract: Cover and density of winter annual plants on the perimeters of
ant nests were compared with those of adjacent reference sites in
three habitats at Jornada LTER.
Data Sets
- Data set documentation:
Density and cover of winter annual plants -
(18KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: ants, plant cover, belowground biomass, annual plants
Abstract: The density and the cover of all winter annual plants were
measured at regular intervals (approximately 30 days) on Pogonomyrmex rugosus nests
- Data set documentation:
Ant nest soil nutrients
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: ants, soil nutrients, annual plants
Abstract: Data set contains chemical analyses for soil samples collected
from five ant nests for each of the three sites for total
nitrogen, (ammonium, nitrate), inorganic phosphorus,
and exchangeable cations (K+, Na+, Ca2+ and Mg2+). Also included
is belowground biomass from five ant nests for each of the three
sites.
- Data set documentation:
Ant nest soil organic matter -
(12KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: ants, soil organic matter, annual plants
Abstract: Data set contains % organic matter of soils sampled in January 1987
from ant nests and adjacent reference sites.
- Data set documentation:
Ant nest soil water content -
(12KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: ants, soil water content, annual plants
Abstract: Soil water content from ant nest edge soil and from adjacent
reference sites (5 meter apart) was measured gravimetically at
monthly intervals from January to May 1987.
- Project documentation:
Arthropod Pitfall Traps-II
Abstract: Pitfall trapping of ground-dwelling arthropods looking at diversity and
density during LTER-II.
Data Set
- Data set documentation:
Arthropod pitfall trap
data (LTER-II) -
(31KB)
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: arthropods, pitfall traps, consumers, populations
Abstract: Data for arthropods captured in pitfall traps on LTER II consumer plots.
Data includes order, family, genus, species, and number.
- Project documentation:
Arthropod Pitfall Traps-III
Abstract: Pitfall trapping of ground-dwelling arthropods looking at diversity and
density during LTER-III.
Data Set
- Data set documentation:
Arthropod pitfall
trap-III
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: lizards, pitfall traps, animals, consumers, populations
Abstract: Data for arthropods captured in pitfall traps on LTER III consumer plots.
Data includes order, family, genus, species, and number.
- Project documentation:
Arthropod species composition from LVAR creosotebush study
Abstract: A field study was conducted 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.
Data Sets
- Data set documentation:
Arthropod trophic group composition data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: creosotebush, Larrea tridentata, foliage arthropods, phytophagous
insects, plant-insect interactions, guild, trophic groups,
herbivores, predators, omnivores
Abstract: 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.
- Data set documentation:
Arthropod species composition
from LVAR creosotebush study
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: creosotebush (Larrea tridentata), phytophagous insects, foliage
arthropods, plant-insect interactions, herbivory, spatial variation
Abstract: This is data for foliage arthropods sampled from Lm 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 selected types, random = R, high quality
= H, low quality = L, were sampled at each site. Total numbers
of individuals of each of the common species of foliage arthropods
from each of the 30 shrubs/site are listed.
- Project documentation:
Jornada Grasshopper and Vegetation Study
Abstract: Desert grasshopper assemblages from sites in the Chihuahuan
desert were assessed for guilds on the basis of substrate or
microhabitat use and morphological characteristics of component
species. Grasshoppers were visually sampled in each quadrat/plot, once
in May, July and September, in 1983, 1984 and 1985. Each
individual grasshopper, its age, sex and substrate it was
observed on, are recorded.
Data Sets
- Data set documentation:
Jornada Grasshopper Data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: grasshoppers, seasonal patterns, annual patterns, spatial
patterns, assembly structure, population dynamics, habitat,
substrates
Abstract: Desert grasshopper assemblages from sites in the Chihuahuan
desert were assessed for guilds on the basis of substrate or
microhabitat use and morphological characteristics of component
species. This is grasshopper data sampled from 9 plots on the east bajada
of the Dona Ana Mts. Grasshoppers were visually sampled in each quadrat/plot, once
in May, July and September, in 1983, 1984 and 1985. Each individual
grasshopper, its age, sex and substrate it was observed on, are
recorded.
- Data set documentation:
Jornada grasshopper plot herbaceous vegetation data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: annual plants, forbs, grasses, herbs, seasonal patterns, annual
patterns, spatial patterns
Abstract: This is data on annual herbaceous plants measured on Jornada
grasshopper plots on the east bajada of the Dona Ana Mts. Annual plants were measured in the NE 1m2 of
each quadrat, once in May, July and September in 1983, 1984
and 1985. All individuals of each species were counted and
measured. A mean diameter, height, and the total number of
individuals/1m2/quadrat were recorded.
- Project documentation:
Lizard Pitfall Traps
Abstract: Pitfall trapping of lizards looking at diversity and density.
Data Set
- Data set documentation:
Lizard pitfall trap data -
(63KB)
Data set access: RESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: arthropods, pitfall traps, consumers, populations
Abstract: In conjunction with net primary production studies, consumer and faunal
studies are conducted at or near NPP sites using pitfall traps. We use live traps, not
employing ethylene glycol or other killing/preservative agents, with traps checked once a
week at the minimum. Sampling-with-replacement is used with the lizards. Variables
measured include species, sex, recapture status, snout-vent length, total length, weight,
and whether tail is broken or whole.
- Project documentation:
Small Mammal Trapping (LTER-II)
Abstract: Small mammal trapping looking at diversity and density.
Data Set
- Data set documentation:
Small mammal trapping
(LTER-II) -
(21KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: small mammals, animals, consumers, population dynamics
Abstract: Small mammal live-traps are located on consumer pitfall plots. A grid of 20 traps is
located on each consumer plot. Small mammals are trapped daily for a one-week period in
the late spring and again in the late summer of each year. Data on species, sex, toe
marks, weight, and reproductive condition are taken.
- Project documentation:
Transect Leaf-litter Microarthropods
Abstract: Changes in microarthropod assemblages were monitored in six types
of decomposing surface leaf-litter confined in mesh bags and set
across a Chihuahuan Desert watershed for 17 months along the LTER-I
Control transect. The following
hypotheses were tested: 1) microarthropod density and diversity are
higher in soils with maximum surface litter accumulation, and 2)
temporal patterns of density and diversity are more dependent on
seasonal factors and physical disturbances than on the
decompositional stage of the litter.
Data Set
- Data set documentation:
Transect leaf-litter microarthropod data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: litter, microarthropods, creosotebush, decomposition, vine mesquite,
mesquite, desert marigold, fluffgrass, black grama grass, mites,
collembolans
Abstract: Changes in microarthropod assemblages were monitored in six types
of decomposing surface leaf-litter confined in mesh bags and set
across a Chihuahuan Desert watershed for 17 months.
- Project documentation:
Small Mammal Exclosure Study
Abstract: The purpose of this study is to determine whether or not the activities
of small mammals regulate plant community structure, plant species diversity, and spatial
vegetation patterns in Chihuahuan Desert shrublands and grasslands. Ants, termites, and
grasshoppers will be monitored since manipulations of small mammals will probably affect
these arthropod consumers.
INTERSITE study: Jornada LTER; Sevilleta LTER; Mapimi, Mexico
Data Sets
- Data set documentation:
SMES rabbit
survey data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: lagomorphs, transects, small mammals, populations dynamics
Abstract: Nighttime spotlighting of rabbits during the full moon at quarterly intervals is being used
to estimate densities of jackrabbits and cottontail rabbits over time. Data on species, perpendicular distance from
center of road to rabbit, and distance along survey route are taken.
- Data set documentation:
SMES rodent
trapping data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: rodents, rodent trapping, small mammals, soil disturbance
Abstract: Rodent trapping webs are being used to determine the composition of
rodent species at each study site in cresotebush and black grama grassland vegetation
zones, and to estimate densities of each species over time.
- Data set documentation:
SMES vegetation
line intercept data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: vegetation, plant species, line intercept
Abstract: Plant line intercept measurements are made along 6 lines within each of
the 36 plots. Intercept length of plant species and bare soil are recorded. Treatment plots
include Control, Rabbit exclusion, Rabbit and rodent exclusion, and cattle exclusion.
- Data set documentation:
SMES
vegetation quadrat data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: vegetation, plant species, canopy cover
Abstract: Plant species composition, cover, and above ground foliage height will be
measured from each of the 36 quadrats on each plot. Treatment plots include Control, Rabbit
exclusion, Rabbit and rodent exclusion, and cattle exclusion.
- Data set documentation:
SMES Cryptogam Crust Data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: cryptogam crusts, cryptobiotic crusts, cryptogams, microbiotic
crusts, soil crust, soil surface
Abstract: Percent cover measurements of cryptogam crusts are made on
the soil surface of each of the 36 one square meter quadrats per plot at creosote and
black grama grassland sites. Treatment plots include Control, Rabbit exclusion, Rabbit
and rodent exclusion, and cattle exclusion.
- Data set documentation:
SMES Leaf Litter Data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: leaf litter, soil surface
Abstract: Percent cover measurements of leaf litter are made on
the soil surface of each of the 36 one square meter quadrats per plot at creosote and
black grama grassland sites. Treatment plots include Control, Rabbit exclusion, Rabbit
and rodent exclusion, and cattle exclusion.
- Data set documentation:
SMES Rabbit Feces Data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: rabbits, rabbit feces, rabbit pellets, fecal counts, scat counts
Abstract: Total number of rabbit feces observed on each of the 36 one square
meter quadrats per plot at creosote and
black grama grassland sites. Rabbit feces collected for first 5 years for possible analysis
at later date. Treatment plots include Control, Rabbit exclusion, Rabbit
and rodent exclusion, and cattle exclusion.
- Data set documentation:
SMES Soil Surface Disturbance
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: soil surface disturbance, animal tracks, animal digs, ant nests,
spider burrows
Abstract: Percent cover and vertical dimension (depth and/or height)
of soil surface disturbance caused by animals. The
type of disturbance is identified whenever possible. Observations are made on each of the
36 one square meter quadrats per plot at creosote and
black grama grassland sites. Treatment plots include Control, Rabbit exclusion, Rabbit
and rodent exclusion, and cattle exclusion.
- Data set documentation:
SMES termite casing data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: termites, casing, gallery carton, foraging activity
Abstract: Termite mud casing on plant litter and dead standing
plant material is measured on the quadrat. Measurements consist of length, diameter,
and height. Observations are made on each of the 36 one square meter quadrats per plot
at creosote and black grama grassland sites. Treatment plots include Control,
Rabbit exclusion, Rabbit and rodent exclusion, and cattle exclusion.
- Project documentation:
Termite Baits
Abstract: Surface measurement of termite consumption of organic material using
baits.
Data Set
- Data set documentation:
Termite bait data -
(28KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: termites, consumers, foraging activity
Abstract: Data for Jornada LTERII termite bait weight loss. Toilet paper roll
termite baits are placed on grids on each consumer plot. Data include initial bait weights
and bait weights after baits have been retrieved from the field once each year. Weight
loss is calculated as a measure of termite foraging activity.
- Project documentation:
Transect Rabbit Herbage Wastage (LTER-I)
Abstract: The study was undertaken to look at clipping, or browsing, of
plants by rabbits in the creosotebush and upper mixed basin zone on
the bajada below Mt. Summerford that extends down to College Playa. Data collected:
rabbit pellet weight and total N content, rabbit
browse material by species and total N content.
Data Sets
- Data set documentation:
Rabbit browsed plant biomass
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: rabbit browse, biomass, transect
Abstract: Rabbit browsed (=clipped) plant material found lying on the
ground was collected from 24 5x5m plots at approximately 1
month intervals. Dry weight by species, date and plot was
recorded.
- Data set documentation:
Rabbit browse total nitrogen
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: rabbit browse, nitrogen, transect
Abstract: Rabbit browse (clippings) were collected from 24 5x5m plots at
approximately 1 month intervals. Plant material collected was subsampled and
analyzed for Total N.
- Data set documentation:
Rabbit Pellet Biomass (LTER-I)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: rabbit pellets, nitrogen, biomass, transect
Abstract: Rabbit pellets were collected from 24 5x5m plots at approximately 1
month intervals. Dry weight by date and plot was recorded.
- Data set documentation:
Rabbit pellet total nitrogen (LTER-I)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: rabbit pellets, nitrogen, biomass, transect
Abstract: Rabbit pellets were collected from 24 5x5m plots at approximately 1
month intervals. Pellets were subsampled and analyzed for Total N.
- Project documentation:
Transect Soil Disturbance (LTER-I)
Abstract: Data were collected on disturbances on soil/surface for different
categories of animal (for example, Novomesser ant). Information was
used to calculate percent disturbance and soil disturbance density
by animal on a fertilized (with NHNO3 in a concentration equal
to 10g N/m2) transect and adjacent control transect.
Data Sets
- Data set documentation:
Transect soil disturbance
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: soil disturbance, rodent mounds, rodent diggings, burrows,
ant mounds
Abstract: Contains areas of disturbances on soil/surface for different
categories of animal (for example, Novomesser ant). To be
used to calculate % disturbance and soil disturbance density
by animal.
- Project documentation:
Transect Termites (LTER-I)
Abstract: Data set includes bi-weekly records of number of termites observed
within and beneath each of 4 rolls of toilet paper placed at each
of 91 stations on treatment and control transects. Observations of
presence of termite activity at each roll (paper eaten, cartons
constructed) are also included.
Data Sets
- Data set documentation:
Transect termites
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager and
responsible
investigator prior to downloading.
Keywords: termites, transect, density, activity
Abstract: Data set includes bi-weekly records of number of termites observed
within and beneath each of 4 rolls of toilet paper placed at each
of 91 stations on treatment and control transects. Observations of
presence of termite activity at each roll (paper eaten, cartons
constructed) are also included.
Return to Research Categories
Climate Projects
- Project documentation:
Atmospheric Deposition (LTER)
Abstract: Chemical analysis of atmospheric deposition as found in dryfall (dust)
and wetfall precipitation since 1983.
Data Sets
- Data set documentation:
Dryfall deposition
chemistry data (Jornada LTER Weather Station)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: atmospheric deposition, precipitation chemistry, nutrient cycling,
nutrient inputs, dryfall
Abstract: Dry atmospheric fallout (dryfall) is collected monthly using an Aerochem
Metrics wetfall/dryfall collector located at the LTER weather station. Each sample is
analyzed for NO3, NH4, Cl, SO4, Ca, Mg, Na, K, Total N, & Total P.
- Data set documentation:
Wetfall deposition
chemistry data (Jornada LTER Weather Station)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: atmospheric deposition, precipitation chemistry, nutrient cycling,
nutrient inputs, wetfall
Abstract: Wet atmospheric fallout (wetfall occurring as precipitation) is collected
monthly using an Aerochem Metrics wetfall/dryfall collector located at the LTER weather
station. Each sample is analyzed for NO3, NH4, Cl, SO4, Ca, Mg, Na, K, Total N, &
Total P.
- Project documentation:
Climatalogical data (LTER)
Abstract: Climatalogical data from Jornada LTER Weather Station
Data Sets
- Data set documentation:
Climatalogical data
(Jornada LTER Weather Station)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: air temperature, relative humidity, precipitation, wind speed, wind
direction, solar radiation, soil temperature, climate, weather
Abstract: Hourly and Daily Summary climate data is collected for Wind Speed, Wind
Direction, Solar Radiation, Relative Humidity, Precipitation, Air Temperature, and Soil
Temperature.
- Project documentation:
Evaporation Pan data
Abstract: Weekly pan evaporation at LTER Weather Station.
Data Sets
- Data set documentation:
Evaporation pan data (Jornada
LTER)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: evaporation, water temperature, precipitation
Abstract: Surface evaporation is measured weekly using an evaporation pan
compatible with standard National Weather Service evaporation measurements. The following
data is collected approximately once a week: max, min, and current H2O temperatures;
initial water level; final water level; rainfall.
- Project documentation:
Transect Precipitation
Abstract: Precipitation is recorded weekly at each of the 91 sampling stations
located 30m apart along the LTER-I Control Transect from a direct-reading rain-gauge
attached to the west cross-arm of the station marker.
Data Sets
- Data set documentation:
Transect precipitation
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: transect, precipitation, rainfall
Abstract: At each of the 91 sampling stations that are located 30m apart along
the LTER-I Control transect is a direct-reading rain-gauge attached
to the west cross-arm of the station marker. Precipitation is recorded
weekly.
- Project documentation:
Upper Trailer Soil Temperature
Abstract: Temperature data was acquired using a mechanical chart recorder of
soil temperatures at 5 cm and 20 cm soil depths at a site
approximately 20' west of the Upper Trailer on the Jornada. (LTER-I)
Data Sets
- Data set documentation:
Upper Trailer soil temperature (LTER-I)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: soil temperature
Abstract: Soil temperature data was acquired using a mechanical chart recorder of
soil temperatures with thermistors at 5 cm and 20 cm soil depths at
a site approximately 20' west of the Upper Trailer on the Jornada.
- Project documentation:
USDA Climatological Data
Abstract: Climate data collected at USDA Jornada Experimental Range
Headquarters which is a NOAA weather station. Daily data
has been collected since 1914 for minimum and maximum air
temperature as well as daily precipitation. Pan evaporation
data was collection from January 1956 through August 1979.
Data Sets
- Data set documentation:
USDA-NOAA Daily Climatological Data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: air temperature, precipitation, climate, weather
Abstract: Daily recipitation and air temperature data
from standard U.S. climatological service instruments located at
USDA Jornada Experimental Range Headquarters.
- Data set documentation:
USDA Monthly Summary Climatological Data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: air temperature, precipitation, climate, weather
Abstract: Monthly summary of precipitation and air temperature data
collected daily from standard U.S. climatological service
instruments located at USDA Jornada Experimental Range
Headquarters.
- Data set documentation:
USDA Monthly Total Pan Evaporation Data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: evaporation, climate, weather
Abstract: Monthly total of pan evaporation data collected daily from standard
U.S. climatological service instruments located at USDA Jornada
Experimental Range Headquarters.
- Project documentation:
JER Standard Gauge Precipitation Data
Abstract: The objective of this long-term project is to measure the precipitation across
the entire Jornada Experimental Range. This is achieved by using a network of
standard-can rain gages to continually collect the precipitation as it occurs.
The collected precipitation is then measured monthly and the results are
recorded on a data sheet which is later entered into a spreadsheet.
Data Sets
- Data set documentation:
JER standard gauge precipitation data
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: precipitation, standard rain gauge, climate, weather
Abstract: The objective of this long-term project is to measure the precipitation
across the entire Jornada Experimental Range. This is achieved by using a
network of standard-can rain gauges to continually collect the precipitation
as it occurs. The collected precipitation is then measured monthly and
the results are recorded on a data sheet which is later entered into a
spread sheet.
Return to Research Categories
Decomposition Projects
- Project documentation:
LTER Fine
Litter Decomposition Experiment (LIDET)
Abstract: The primary objective of this study is to examine the control that
substrate quality and climate have on patterns of long-term decomposition and nitrogen
accumulation in above- and below-ground fine litter.
INTERSITE study: Includes all major terrestrial biomes in North America.
Twenty-eight sites are involved.
Data Sets
- Data set documentation:
LTER Fine
Litter Decomposition Experiment (LIDET)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: decomposition, decay rates, litterbags, leaf litter, fine roots, wood,
nitrogen, phosphorus, carbon fractions, LIDET
Abstract: The primary objective of this study is to examine the control that
substrate quality and climate have on patterns of long-term decomposition and nitrogen
accumulation in above- and below-ground fine litter.
- Project documentation:
Termite Baits
Abstract: Surface measurement of termite consumption of organic material using
baits.
Data Sets
- Data set documentation:
Termite bait data -
(28KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: termites, consumers, foraging activity
Abstract: Data for Jornada LTERII termite bait weight loss. Toilet paper roll
termite baits are placed on grids on each consumer plot. Data include initial bait weights
and bait weights after baits have been retrieved from the field once each year. Weight
loss is calculated as a measure of termite foraging activity.
Return to Research Categories
Hydrology Projects
- Project documentation:
Hydrology Natural Runoff Plots
Abstract: Looking at infiltration and runoff rates as related to rain event
duration and intensity as well as soil and organic movement as related natural runoff
events in creosotebush and grassland zones.
Data Sets
- Data set documentation:
Hydrology plot surface
runoff water chemistry -
(22KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: hydrology, surface runoff, streamwater chemistry, nutrient cycling,
nutrient transport
Abstract: The data consists of chemical analyses of dissolved ions in samples of
surface runoff from natural rainfall events collected from experimental hydrology plots in
creosotebush scrub and grassland areas of the New Mexico State University Ranch and USDA
Jornada Experimental Range. Chemical analyses are for F, Cl, NO3, SO4 by ion
chromatography, NH4 by autoanalyzer, Ca, Mg, Na, K by atomic absorption spectrophotometry,
and total N and P by autoanalyzer.
- Data set documentation:
Hydrology natural runoff
plots - runoff -
(26KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: hydrology, runoff, sediment, precipitation, deposit, carbon
Abstract: This is the Jornada Long Term Ecological Research site data base for the
2 x 2 meter natural rainfall-runoff plots. Variables include runoff depth, suspended
sediment concentration, precipitation, deposited sediment, and % organic carbon.
- Data set documentation:
Hydrology natural runoff plots plant cover -
(20KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: hydrology, plant cover
Abstract: On 10/27/89, 03/14/90, and 10/19/90, % plant cover by species
was measured on 20 2x2m hydrology run off plots using quadrats
with 10x10cm units.
- Project documentation:
Nutrient losses in runoff from grassland
and shrubland habitats: I. Rainfall simulation experiments
Abstract: Rainfall simulation experiments were performed in aras of semiarid
grassland (Boutelous eriopoda) and arid shrubland (Larrea tridentata). The objective was
to compare the runoff of nitrogen (N) and phosphorus (P) from these habitats to assess
whether losses of soil nutrients are associated with the invasion of grasslands by shrubs.
Data Sets
- Data set documentation:
Nitrogen and phosphorus chemistry
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: grassland, shrubland, nitrogen, nitrogen budget, phosphorus, runoff,
hydrology, desertification
Abstract: This data set was collected to provide data for comparison of the losses
of dissolved nitrogen and phosphorus in the runoff from grass- and shrub- dominated plots
in the Jornada Basin of southern New Mexico.
- Data set documentation:
SUMMARY of grassland nitrogen and phosphorus chemistry
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: grassland, nitrogen, nitrogen budget, phosphorus, runoff, hydrology,
desertification
Abstract: This data set was collected to provide data for comparison of the losses
of dissolved nitrogen and phosphorus in the runoff from grass- and shrub- dominated plots
in the Jornada Basin of southern New Mexico. Contains summary nutrient loss data from
grassland rainfall simulation site.
- Data set documentation:
SUMMARY of intershrub nitrogen and phosphorus chemistry
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: shrubland, nitrogen, nitrogen budget, phosphorus, runoff, hydrology,
desertification
Abstract: This data set was collected to provide data for comparison of the losses
of dissolved nitrogen and phosphorus in the runoff from grass- and shrub- dominated plots
in the Jornada Basin of southern New Mexico. Contains summary nutrient loss data from
intershrub rainfall simulation site.
- Data set documentation:
SUMMARY of shrub nitrogen and phosphorus chemistry
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: shrubland, nitrogen, nitrogen budget, phosphorus, runoff, hydrology,
desertification
Abstract: This data set was collected to provide data for comparison of the losses
of dissolved nitrogen and phosphorus in the runoff from grass- and shrub- dominated plots
in the Jornada Basin of southern New Mexico. Contains summary nutrient loss data from
shrub rainfall simulation site.
Return to Research Categories
Intersite Projects
- Project documentation:
LTER Fine
Litter Decomposition Experiment (LIDET)
Abstract: The primary objective of this study is to examine the control that
substrate quality and climate have on patterns of long-term decomposition and nitrogen
accumulation in above- and below-ground fine litter.
INTERSITE study: Includes all major terrestrial biomes in North America.
Twenty-eight sites are involved.
- Data set documentation:
LTER Fine
Litter Decomposition Experiment (LIDET)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: decomposition, decay rates, litterbags, leaf litter, fine roots, wood,
nitrogen, phosphorus, carbon fractions, LIDET
Abstract: The primary objective of this study is to examine the control that
substrate quality and climate have on patterns of long-term decomposition and nitrogen
accumulation in above- and below-ground fine litter.
- Project documentation:
Small Mammal Exclosure Study
Abstract: The purpose of this study is to determine whether or not the activities
of small mammals regulate plant community structure, plant species diversity, and spatial
vegetation patterns in Chihuahuan Desert shrublands and grasslands. Ants, termites, and
grasshoppers will be monitored since manipulations of small mammals will probably affect
these arthropod consumers.
INTERSITE study: Jornada LTER; Sevilleta LTER; Mapimi, Mexico
Data Sets
- Data set documentation:
SMES rabbit
survey data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: lagomorphs, transects, small mammals, populations dynamics
Abstract: Nighttime spotlighting of rabbits during the full moon at quarterly intervals is being used
to estimate densities of jackrabbits and cottontail rabbits over time. Data on species, perpendicular distance from
center of road to rabbit, and distance along survey route are taken.
- Data set documentation:
SMES rodent
trapping data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: rodents, rodent trapping, small mammals, soil disturbance
Abstract: Rodent trapping webs are being used to determine the composition of
rodent species at each study site, and to estimate densities of each species over time.
- Data set documentation:
SMES vegetation
line intercept data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: vegetation, plant species, line intercept
Abstract: Plant line intercept measurements are made along 6 lines within each of
the 36 plots. Intercept length of plant species and bare soil are recorded.
- Data set documentation:
SMES
vegetation quadrat data
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: vegetation, plant species, canopy cover
Abstract: Plant species composition, cover, and above ground foliage height will be
measured from each of the 36 quadrats on each plot.
Return to Research Categories
Plant Projects
- Project documentation:
Patterns of Net Primary Productivity
Abstract: Patterns of net primary production over a range of ecosystem types and
geographic areas of the Jornada basin with biomass and productivity estimates.
- Data set documentation:
Net primary production
quadrat data -
(415KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: productivity, harvest, plants, spatial and temporal patterns
Abstract: Standing biomass is sampled three times a year: in winter (February -
March), before shrubs begin spring growth; in spring (May), when shrubs and spring annuals
have reached peak biomass; in fall (late summer; October), when summer annuals have
reached peak biomass but before killing frosts. Data collected include percent cover,
height, and phenological stage.
- Attention Previous Data Users: This online data set has been CORRECTED and updated as of 24 January 2005. Additional QA resulted in corrections to some field data values. See [url link to doc] for
specifics.
- Data set documentation:
Net primary production
quadrat biomass data -
(172KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass, canopy cover
Abstract: These data sets contain calculated aboveground biomass values, by
species, for each quadrat in each site for a given season. They are constructed (as
outlined below) from the field data which are measurements of the physical dimensions
(horizontal cover, vertical height) of plants or plant parts in the quadrats. Objective is
to monitor patterns (both temporal and spatial) of aboveground biomass across a range of
ecosystem types; to allow the estimation of net primary production and its variability in
those ecosystems; and to provide a quantitative description of plant community structure
over time in those ecosystems.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Annual aboveground net
primary production, SUMMARY -
(28KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass
Abstract: Summarizes mean aboveground net primary production, in g/m2/yr, by year
for each of 15 sites. Annual totals derived by summing seasonal production values for
winter (October - February), spring (February - May), and fall (May - October) increments
for a single calendar year.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Annual aboveground net
primary production, SUMMARY TABLE
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass
Abstract: (Table format) Summarizes mean aboveground net primary production, in g/m2/yr, by year
for each of 15 sites. Annual totals derived by summing seasonal production values for
winter (October - February), spring (February - May), and fall (May - October) increments
for a single calendar year.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Seasonal mean aboveground
biomass, SUMMARY -
(20KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass
Abstract: Summarizes mean aboveground live biomass (summed across species), in
g/m2, for each of 15 sites. Averages derived by estimating aboveground biomass of each
species on each quadrat (NQBIOxxy DAT datasets) from non-destructive field measurements,
summing across all species in a quadrat, and then averaging for all quadrats in a site.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Seasonal mean aboveground
biomass, SUMMARY TABLE
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass
Abstract: (Table format) Summarizes mean aboveground live biomass (summed across species), in
g/m2, for each of 15 sites. Averages derived by estimating aboveground biomass of each
species on each quadrat (NQBIOxxy DAT datasets) from non-destructive field measurements,
summing across all species in a quadrat, and then averaging for all quadrats in a site.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Seasonal aboveground net
primary production, SUMMARY -
(21KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass
Abstract: Summarizes aboveground net primary productivity (summed across species),
in g/m2/yr, for each of 15 sites. Averages derived by calculating increment in biomass for
each species in each quadrat during interval (winter - spring, spring - fall, or fall -
winter), then summing all positive increments for each quadrat, and finally averaging for
all quadrats in a site.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Seasonal aboveground net
primary production, SUMMARY TABLE
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass
Abstract: (Table format) Summarizes aboveground net primary productivity (summed across species),
in g/m2/yr, for each of 15 sites. Averages derived by calculating increment in biomass for
each species in each quadrat during interval (winter - spring, spring - fall, or fall -
winter), then summing all positive increments for each quadrat, and finally averaging for
all quadrats in a site.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Seasonal aboveground net
primary production by species per plot, SUMMARY -
(43KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: primary productivity, plants, biomass, climatic response
Abstract: Summarizes aboveground net primary productivity over interval by species
per plot, in g/m2, for each of 15 sites. Averages derived by calculating increment in
biomass for each species in each quadrat during interval (winter - spring, spring - fall,
or fall - winter), then summing all positive increments for each quadrat.
- Attention: Data and regression equations have been temporary removed to recalculate based on the regression forced through zero. This will allow intersite comparability of data using similar methodology. It will be reposted here when that has been done.
- Data set documentation:
Net primary production
reference harvest data -
(36KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetation, plant species, canopy cover
Abstract: This is the reference harvest biomass data of plants near, but outside
the grid of permanent NPP quadrats that was harvested for each of 15 sites located in 5
plant community zones. Height and cover are recorded in the field. Live biomass is weighed
in the lab and all measurements are recorded as reference harvest data.
- Project documentation:
Perennial Plant Phenology on NPP
Sites
Abstract: The phenological stage of all perennial plant species on the 15 NPP sites
is recorded on a monthly basis.
- Data set documentation:
Plant phenology
transect at NPP sites -
(117KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: phenology, flowering, plants
Abstract: The phenological stage of all perennial plant species on the 15 NPP sites
is recorded on a monthly basis. This allows us to track
the influence of weather and of site differences on plant reproduction. The
boundaries of the (80m x 80m) study plot are walked and each
individual plant of any perennial species in a 1-m belt is examined and its phenology
noted (non-reproductive, in bud, in flower, in fruit, or dormant).
- Project documentation:
Plant Nutrient Distribution In Long-Term
NPP Plots
Abstract: Plant tissue chemical analyses for selected species.
- Data set documentation:
Plant nutrient
distribution beneath and between plant canopies in the mesquite, grassland, playa,
creosotebush, and tarbush plant communities -
(18KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: plant nutrients, mesquite, grassland, playa, creosotebush, tarbush
Abstract: The LTER plant biomass plots were harvested during spring, fall, 1989 and
winter 1990, in 5 vegetation zones (Mesquite, Grassland, Playa, Creosotebush, Tarbush), 3
sites per zone (site with low, medium, and high biomass, ranked based on fall-89 biomass).
Samples were analyzed for total Kjeldahl N, and total phosphorus.
- Project documentation:
Transect Plant Line Intercepts
Abstract: Transect plant line intercepts were established on 2.7 km transects
beginning in 1982 which traverse a variety of both soil and vegetation zones extending
from playa to mountain.
- Data set documentation:
Transect plant line
intercepts - LTER series (sorted sheet format) -
(80KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, plant community
Abstract: Data set consists of 30-meter plant line-intercept measurements from
LTER-I 2.7 km transects beginning in 1982. Data formatted to match those data entered from
field data sheets.
- Data set documentation:
Transect plant line
intercepts - field data (tape format) -
(50KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, plant community
Abstract: Data set consists of 30-meter plant line-intercept measurements from
LTER-I 2.7 km transects beginning in 1982. Data formatted to match those data entered from
audio cassette tapes as recorded in field.
- Data set documentation:
Transect plant line
intercepts - LT series (% cover) -
(58KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, plant community
Abstract: Average percent coverage of each plant species per 5-meter segment along
a 30-meter line intercept perpendicular to each of 91 stations on each of the three LTER-I
permanent transects.
- Project documentation:
East & West Boundary Fence Plant Line
Intercepts
Abstract: Fence line plant line intercepts were established on either side of LTER
exclosure excluded from grazing in 1982. Study provides the opportunity to investigate the
response of vegetation with respect to landscape characteristics as well as release from
grazing.
- Data set documentation:
East & west boundary
fence plant line intercepts - Sorted data -
(84KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, grazing effects, fence
line
Abstract: Data set consists of 15-meter plant line intercept measurements of
perennials on either side of the LTER-I exclosure East and West boundary fence made at 5
year intevals to access response of plant community to the removal of grazing. Data is
sorted by station, species i.d., then line segment. The LTER-I exclosure has been excluded
from grazing since 1982. Data for Weeks 41, 247, 559, and 876.
- Data set documentation:
East & West Boundary
Fence Plant Line Intercepts - Raw data (Book) -
(52KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, grazing effects, fence
line
Abstract: Unsorted field data as recorded on data sheets. Data set consists of
15-meter plant line intercept measurements of perennials on either side of the LTER-I
exclosure East and West boundary fence made at 5 year intevals to access response of plant
community to the removal of grazing. The LTER-I exclosure has been excluded from grazing
since 1982.
- Data set documentation:
East & West Boundary
Fence Plant Line Intercepts - Raw data (Tape) -
(36KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, grazing effects, fence
line
Abstract: Unsorted field data as recorded on cassette tape. Data set consists of
15-meter plant line intercept measurements of perennials on either side of the LTER-I
exclosure East and West boundary fence made at 5 year intevals to access response of plant
community to the removal of grazing. The LTER-I exclosure has been excluded from grazing
since 1982.
- Data set documentation:
East &
East & west boundary fence plant line intercepts - Summary Data -
(51KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetative cover, line intercepts, plant cover, grazing effects, fence
line
Abstract:
This summary data set consists of percent cover of 9 species
from the plant line intercept measurements on either side of the
LTER-I exclosure East and West boundary fence. Data is sorted by
station, species i.d., then line segment. Along the East
Boundary fence, the east side is ungrazed (control) and the west
side is grazed (treatment). Along the West Boundary fence, the
east side is grazed and the west side is ungrazed. Each plant
line transect is divided into 6 5-meter segments. All perennials
were measured at about 5 year intervals as the length of
intercept along a 30-meter line perpendicular to the fence.
Summary data includes only four of the 6 5-meter intervals due to
disturbance along fenceline. Data from the 5-meter segment on
either side of the fence was not included in summarizing the
data. Summary data includes only 9 of the perennial species.
- Project documentation:
Ecosystem Effects of Plant Diversity
(Biodiversity Experiment)
Abstract: One hypothesis is that plant biomass, rather than the species or
functional group composition of the plants, is the critical regulator of ecosystem
function.
Another hypothesis is that the architecture and physiology of different groups of plants
differ sufficiently that each functional group contributes in a unique way to ecosystem
function.
We therefore are testing the impact of removing various groups or growth forms from the
plant community.
- Data set documentation:
Biodiversity study:
Erosion zone vegetation
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: erosion, plant cover, soil
Abstract: Vegetative cover measurements are made immediately upslope of
erosion pans to estimate plant cover and volume.
- Data set documentation:
Biodiversity study:
Biomass removal, initiation of experiment
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: plant biomass, plant community structure
Abstract: Sum of dry mass removed for each plant growth form from each plot of
biodiversity experiment. Amount of plant material removed in initial establishment of
plant diversity treatments was recorded for later use as covariate or measure of
disturbance. Material was weighed in the field by species, and species-level data are
available from Huenneke; however, this file summarizes plant material removed (dry mass)
by growth form (shrub, subshrub, perennial grass, succulent) and by total live dry mass.
Also provided are mass of dead material collected from plots (same species as live
material removed for each treatment) and total dry mass, live plus dead.
- Data set documentation:
Biodiversity study:
Biodiversity plant response, Summer 1999
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: plant community, plant population, plant disturbance, plant biodiversity
Abstract: Pilot study to examine feasibility of measuring individual
species response to competing vegetation removal.
- Data set documentation:
Biodiversity study:
Vegetation transects
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: vegetation response to disturbance, plant community structure, plant
diversity, plant cover
Abstract: The vegetation transects are measured once or twice a year to assess the
response of the plant community to the manipulations of species and functional diversity.
- Data set documentation:
The effects of changing
vegetative composition on the abundance, species diversity and activity of birds in the
Chihuahuan Desert (LTER-III)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: birds, habitat preference, behavior, perching, singing, breeding birds,
desert birds
Abstract: Changes in plant composition have the potential to cause disturbances in
both structure and function throughout the ecosystem. One element of the ecosystem that
could possibly be affected is bird diversity and behavior. In this study we examine how
different types of plant types and growth affect bird abundance, bird species diversity,
and bird activity in the Chihuahuan desert.
- Data set documentation:
Biodiversity study:
Soil erosion pan
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: erosion, soil, plant litter, rabbit pellets, organic matter
Abstract: Collection of surface sediment resulting from erosion and
transport by wind and water
- Project documentation:
Fluff grass: Microarthropod effects on
nitrogen availability
Abstract: It is hypothesized that
changing densities of soil microarthropods would result in changes
in nitrogen availability. In order to test this hypothesis,
Erionueron pulchellum rhizosphere soil samples were taken monthly
from control plots, plots irrigated with 6mm/wk, plots soaked with
chlordane (to remove microarthropods), and plots treated with
chlordane that were irrigated with 6 mm/wk. These samples were
analyzed for available inorganic nitrogen (NO3 and NH4), gravimetric
soil moisture, plant shoot and root biomass, plant shoot and root
total nitrogen, plant growth, microarthropod and nematode densities.
- Data set documentation:
Fluff grass mesocosm: mites and nematodes -
(13KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: fluffgrass, chlordane, nematode, mite, nitrogen
Abstract: A mesocosm experiment was conducted on fluff grass (Erioneuron
pulchellum) plants to look at the effect of exclusion of mites
(with chlordane), nematodes (NEMACUR), mites and nematodes, on soil
available, total and microbial nitrogen.
- Data set documentation:
Mesocosm microarthropod numbers -
(11KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: fluffgrass, microarthropods, mesocosm
Abstract: A mesocosm experiment was conducted on fluff grass plants to
look at the effect of exclusion of mites (with chlordane), nematodes
(with NEMACUR), mites and nematodes, on soil available, total and
microbial nitrogen. Numbers of microarthropods per 1000g of soil is
recorded in this data file.
- Data set documentation:
Fluffgrass rhizosphere N mineralization potential -
(14KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: nitrogen, mineralization, fluffgrass, mites, irrigation, pesticides
Abstract: Nitrogen mineralization potential of soil rhizosphere of Erioneuron
pulchellum from Silva's dissertation research plots. Twenty 6 x 6 m
plots were established with a 3 m buffer between plots. Five plots were
randomly assigned to one of four treatments: (1) chlordane amendment
100ml AI (active ingredients) per 10,000 ml) to exclude microarthropods,
(2) sprinkler irrigation (6 mm per week), (3) sprinkler irrigation (6
mm/week) plus chlordate amendment (as above), (4) control (no treatment).
Three randomly located subsamples were taken from each plot
consisting of a fluff grass plant and a soil core 10 cm in diameter
and 15 cm deep centered on each plant. [taken from page 11 of
dissertation]
- Data set documentation:
Fluff grass soil nitrogen
Data set access: RESTRICTED Requires release authorization by responsible
investigator .
Keywords: nitrogen, soil organic, nematodes, microarthropods
Abstract: This data set consists of soil analyses for nitrate,
ammonium, total nitrogen, moisture content, organic matter, mite
weight, nematode weight and root weight of Erioneuron pulchellum
soil rhizosphere samples taken at monthly intervals from Silva's
dissertation research plots. Twenty 6 x 6 m plots were established
with a 3 m buffer between plots. Five plots were randomly
assigned to one of four treatments: (1) chlordane amendment
100ml AI (active ingredients) per 10,000 ml) to exclude
microarthropods, (2) sprinkler irrigation (6 mm per week),
(3) sprinkler irrigation (6 mm/week) plus chlordate amendment (as
above), (4) control (no treatment). Three randomly located
subsamples were taken from each plot.
- Data set documentation:
Fluff grass plant total nitrogen -
(13KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: fluffgrass, dry weights, total nitrogen, Chlordane, irrigation
Abstract: Dry weight biomass and total nitrogen were determined for
flowers, green leaves and yellow and grey leaves of fluffgrass
plants collected from plots.
- Data set documentation:
Fluff grass plant growth -
(12KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: fluffgrass, Chlordane, irrigation, plant growth
Abstract: This data set consists of periodic size measurements of
permanently marked individual fluff grass plants. Measurements were
taken in March, July, and September 1986.
- Data set documentation:
Fluffgrass anion exchange resins bags for NO3 -
(12KB)
Data set access: UNRESTRICTED Requires notification of Jornada LTER Data Manager prior to
downloading.
Keywords: resin-bag, fluffgrass, rhizosphere, decomposition, nitrogen, nitrate
Abstract: An ion exchange resin bag technique (Binkley 1984, Lajtha 1988)
was used to determine N availability in the rhizosphere of
fluffgrass. Ion exchange resin bags were used to determine NO3.
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