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Signature dataset

Dataset: 

Study number: 

262

Data set ID: 

210262005

Date range: 

2005-01-01 to 2014-12-31

Original investigator: 

Brandon Bestelmeyer

Data contact: 

Abstract: 

   Dataset consists of the annual aboveground net primary production (ANPP) across 3
   habitats grouped by plant form and total ANPP.  The habitats are grassland, mesquite
   shrubland, and the ecotone between the 2. The plant forms are winter annual forb,
   annual forb, bi-annual forb, perennial forb, annual grass, perennial grass, shrub, and
   sub-shrub.

   Dataset consists of the annual aboveground net primary production (ANPP) across 3
   habitats grouped by plant form and total ANPP.  The habitats are grassland, mesquite
   shrubland, and the ecotone between the 2. The plant forms are winter annual forb,
   annual forb, bi-annual forb, perennial forb, annual grass, perennial grass, shrub, and
   sub-shrub.

   OBJECTIVE:  The purpose of the study is to investigate how pulses of precipitation
   translate into pulses of plant aboveground net primary productivity (NPP) and how the
   small mammal community responds to such changes also in relation to shrub gradient
   across the landscape.  Particularly we are interested in how the energy flows through
   the ecosystem in response to pulses of rain, how the small mammal community partition
   resources (in terms of C3 (forbs and shrubs) and C4 (grasses) plants) and how the
   genetic structure of some species (e.g., Dipodomys spp.) is affected by their
   population dynamics.

   HYPOTHESES:

   1) Small mammal abundance should respond positively to precipitation and NPP.

   2) On a temporal scale, the small mammal energy use should show parallel fluxes along
   the shrub gradient.

   3) The small mammal community should consume C3 and C4 plants according to their
   availability (or NPP).

   4) At low population density, dispersal should be limited and the genetic variance will
   be distributed among populations rather than within (i.e., Fst will trend towards
   higher values).  After pulses of rain and NPP, population densities will be greater,
   dispersal prevalent, and the genetic variance of populations will be distributed within
   populations (i.e., Fst will approach zero) as dispersal homogenizes populations.

   Total aboveground annual net primary productivty is calculated for winter annual forb,
   annual forb, bi-annual forb, perennial forb, annual grass, perennial grass, shrub,
   sub-shrub, and the total of these.
 

Data download: 

Description: 

Data file (CSV) for the Jornada dataset: Ecotone Study: Plant Above Ground Net Primary Productivity by Site

Data file (CSV) for the Jornada dataset: Ecotone Study: Plant Above Ground Net Primary Productivity by Site

Keywords: 

Dataset: 

Study number: 

262

Data set ID: 

210262001

Date range: 

2008-04-21 to 2014-10-30

Original investigator: 

Brandon Bestelmeyer

Data contact: 

Abstract: 

   Dataset consists of plant measurements used to calculate the annual aboveground net 
   primary production (ANPP) across 3 habitats grouped by plant form and total ANPP.  
   The habitats are grassland, mesquite shrubland, and the ecotone between the 2. The 
   plant forms are winter annual forb, annual forb, bi-annual forb, perennial forb, 

   Dataset consists of plant measurements used to calculate the annual aboveground net 
   primary production (ANPP) across 3 habitats grouped by plant form and total ANPP.  
   The habitats are grassland, mesquite shrubland, and the ecotone between the 2. The 
   plant forms are winter annual forb, annual forb, bi-annual forb, perennial forb, 
   annual grass, perennial grass, shrub, and sub-shrub.

   OBJECTIVE:  The purpose of the study is to investigate how pulses of precipitation
   translate into pulses of plant aboveground net primary productivity (NPP) and how the
   small mammal community responds to such changes also in relation to shrub gradient
   across the landscape.  Particularly we are interested in how the energy flows through
   the ecosystem in response to pulses of rain, how the small mammal community partition
   resources (in terms of C3 (forbs and shrubs) and C4 (grasses) plants) and how the
   genetic structure of some species (e.g., Dipodomys spp.) is affected by their
   population dynamics.

   HYPOTHESES:

   1) Small mammal abundance should respond positively to precipitation and NPP.

   2) On a temporal scale, the small mammal energy use should show parallel fluxes along
   the shrub gradient.

   3) The small mammal community should consume C3 and C4 plants according to their
   availability (or NPP).

   4) At low population density, dispersal should be limited and the genetic variance will
   be distributed among populations rather than within (i.e., Fst will trend towards
   higher values).  After pulses of rain and NPP, population densities will be greater,
   dispersal prevalent, and the genetic variance of populations will be distributed within
   populations (i.e., Fst will approach zero) as dispersal homogenizes populations.

   Total aboveground annual net primary productivty is calculated for winter annual forb,
   annual forb, bi-annual forb, perennial forb, annual grass, perennial grass, shrub,
   sub-shrub, and the total of these.
 

Data download: 

Description: 

Data file (CSV) for Jornada dataset: Ecotone Study: Quadrat Plant Measurement Data

Data file (CSV) for Jornada dataset: Ecotone Study: Quadrat Plant Measurement Data

Keywords: 

Dataset: 

Study number: 

308

Data set ID: 

210308005

Date range: 

2008-05-02 to 2016-08-05

Original investigator: 

Jeff Herrick

Data contact: 

Abstract: 

    Repeat digital groundbased photos are taken once to twice a year to document plant litter and
    soil deposition or removal by wind and water transport on ten microplots located on each of the
    8 plots at each of the Aeolian, Dona Ana, and Gravelly Ridges sites. Five photos are taken of

    Repeat digital groundbased photos are taken once to twice a year to document plant litter and
    soil deposition or removal by wind and water transport on ten microplots located on each of the
    8 plots at each of the Aeolian, Dona Ana, and Gravelly Ridges sites. Five photos are taken of
    each microplot: One overhead (from directly over the microplot) and 4 lateral views at ground
    level of the microplot from each cardinal direction.

   Digital filenames are fully descriptive of the site, plot, microplot, photo view, and date taken.
   Photo filename structure:
      Example: A1-1E_20101109_IMG_1006368.jpg
               12-34_55556677_88888888888.jpg
         Where 1 = site: A=Aeolian: D=Dona Ana; G=Gravelly Ridges
               2 = plot (1-8)
               3 = microplot (1-10)
               4= photo view (O=overview; E=looking east; N=looking north; S=looking south; W=looking west
               5-6-7 = year month day of photo
               8 = original image number assigned by camera

Data download: 

Description: 

Data file (CSV) for Jornada dataset: Conmod Pilot Study:  Connectivity Microplot Repeat Photos

Data file (CSV) for Jornada dataset: Conmod Pilot Study:  Connectivity Microplot Repeat Photos

Keywords: 

Dataset: 

Study number: 

308

Data set ID: 

210308004

Date range: 

2008-06-02 to 2015-05-27

Original investigator: 

Greg Okin

Data contact: 

Abstract: 

    There are 3 sites for this study:  Gravelly Ridges, Aeolian, and Dona Ana.  Within each site,
    there are 8 plots.  The plots are 8x8 meters and have an 8x8 buffer zone on both sides of the
    plot (up and down).  There are four BSNE stands for each plot, 2 in each of the 2 buffer zones

    There are 3 sites for this study:  Gravelly Ridges, Aeolian, and Dona Ana.  Within each site,
    there are 8 plots.  The plots are 8x8 meters and have an 8x8 buffer zone on both sides of the
    plot (up and down).  There are four BSNE stands for each plot, 2 in each of the 2 buffer zones
    (8 collectors per plot).  Each stand contains 2 BSNE collectors with the collection opening at
    10cm and 30cm height and an opening of 2 cm wide and 5 cm height.  These BSNE collectors are in
    a fixed position pointing into the direction of the prevailing wind, which corresponds to the
    plot alignment.  The collectors in the upwind buffer are facing away from the plot and the
    collectors in the downwind buffer are facing into the plot.  The idea is the upwind BSNEs
    measure the amount of dust entering the plot, and the downwind BSNEs measure the amount of dust
    moving off the plot.  This provides a measure of the effectiveness of the plot obstructions to
    wind blown dust.  It is important the BSNEs are fixed in an orientation that points across the
    full length of the plot.
 

Data download: 

Description: 

Data file (CSV) for Jornada dataset: Conmod Pilot Study:  BSNE Dust Collection Data

Data file (CSV) for Jornada dataset: Conmod Pilot Study:  BSNE Dust Collection Data

Dataset: 

Study number: 

13

Data set ID: 

210013003

Date range: 

1989-07-05 to 2015-12-01

Original investigator: 

Wesley Jarrell

Data contact: 

Abstract: 

    Monthly 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 (CPN Model 503DR Hydroprobe).  The counts
    of thermalized neutrons are adjusted for the decay rate of Americium
    241, then converted to soil water content using individual site

    Monthly 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 (CPN Model 503DR Hydroprobe).  The counts
    of thermalized neutrons are adjusted for the decay rate of Americium
    241, then converted to soil water content using individual site
    regressions.  Soil water content is a volume/volume relationship and
    represent cm3 water/cm3 soil.  Data are provided at 30cm intervals from
    30cm to a maximum of 270cm soil depth, shallower when an impenetrable
    caliche layer is reached.  Field readings may include one at 300cm;
    however, the value for the deepest depth of each access tube is removed
    from the calculated soil water content data because of the effect of
    measuring greater soil volume directly below the probe than that of the
    more shallow depths.

Data download: 

Description: 

Data file information for the following Jornada data set: Soil Volumetric Water Content at the 15 NPP Sites of the Jornada Basin LTER from 1989

Data file information for the following Jornada data set: Soil Volumetric Water Content at the 15 NPP Sites of the Jornada Basin LTER from 1989

Keywords: 

Dataset: 

Study number: 

407

Data set ID: 

210407001

Date range: 

1976-04-22 to 2010-12-31

Original investigator: 

Eddie Garcia

Data contact: 

Abstract: 

    This data set is comprised of daily precipitation totals, in inches, measured by Belfort
     Instruments weighing rain gauges at 58 locations on the Jornada Experimental Range.
     Locations and the dates during which data were collected at them were generally project-oriented.
     See comment section (#20) for start and end dates for each location.

    This data set is comprised of daily precipitation totals, in inches, measured by Belfort
     Instruments weighing rain gauges at 58 locations on the Jornada Experimental Range.
     Locations and the dates during which data were collected at them were generally project-oriented.
     See comment section (#20) for start and end dates for each location.

    Days on which data could not be obtained (due to equipment failure, user error, and/or
     other reasons) are flagged as missing within this dataset.  As of 31 December 2008 they
     comprised 1,270 of the total 291,465 records, which is less than 0.44% of the data set.
 

Data download: 

Description: 

Data file information for the following Jornada data set: USDA-ARS Jornada Experimental Range Recording (Weighing) Rain Gauge Daily Data begins 1976

Data file information for the following Jornada data set: USDA-ARS Jornada Experimental Range Recording (Weighing) Rain Gauge Daily Data begins 1976

Keywords: 

Dataset: 

Study number: 

461

Data set ID: 

210461001

Date range: 

1996-02-27 to 2009-10-27

Original investigator: 

Kris Havstad

Abstract: 

The goal of this sampling effort is to describe the vegetation response to treatments.  Data were collected following the line-point intercept method (Herrick et al.

2009).  Although the original LPI data set was in multivariate form with separate columns for canopy layers and soil surface, this data set has been transposed into vertical form, implementing a “layer” variable, so that all species and soil surface codes appear in one column.  Within each exclosure, 4837 points were sampled with the following exceptions:

year

exclosure

total_points_sampled

1996

5

4825

1996

7

4836

1996

9

4836

1996

10

4836

1997

1

4830

1997

2

4830

1997

3

4830

1997

4

4830

1997

5

4830

1997

6

4830

1997

7

4830

1997

8

4830

1997

9

4830

1997

10

4830

1997

11

4830

1997

12

4830

1997

13

4830

1997

14

4830

1997

15

4830

1997

16

4830

1997

17

4830

1997

18

4830

2002

12

4835

 

Data download: 

Description: 

Dataset: 

Study number: 

228

Data set ID: 

210228001

Date range: 

2008-03-18 to 2015-06-11

Original investigator: 

Dale A Gillette

Data contact: 

Abstract: 

Dataset consists of horizontal dust flux at multiple heights from BSNE dust collectors located in treatment plots (different percent vegetation removed) and adjacent downwind effect plots. Year 2008 was an annual collection. Collection in subsequent years occurred before and after the wind season.
The experiment was designed to test the effects of increasing wind erosion on soil and vegetation properties at the Jornada.  In order to increase wind erosion rates, vegetation was removed to increase bare surface area and stimulate erosion (the less vegetation present the greater the wind erosion).  The basic experimental design includes three treatment blocks.  Each block has four treatment plots with different level of vegetation removed (25-100%) and a control treatment.  Treatment plots are 25x50m with 25m buffers between.  The vegetation removal includes grasses and small shrubs (like XASA and ZIGR), but not mesquite or yucca or any of the larger shrubs).  Also, adjacent downwind plots are included in the design.  These plots are strictly for monitoring of soil and vegetation properties, so no maintenance is required on these areas.

Data download: 

Description: 

Keywords: 

Dataset: 

Study number: 

308

Data set ID: 

210308002

Date range: 

2008-06-10 to 2012-06-28

Original investigator: 

Debra Peters

Data contact: 

Abstract: 

    Line-Point Intercept data are collected annually for this project beginning in 2008. No data were
    collected in 2011. There are 4 pairs of plots consisting of control and treatment. Each plot is
    8x8 meters with an 8x8 meter buffer plot above and below it. Treatment plots have connectivity modules
    Line-Point Intercept data are collected annually for this project beginning in 2008. No data were
    collected in 2011. There are 4 pairs of plots consisting of control and treatment. Each plot is
    8x8 meters with an 8x8 meter buffer plot above and below it. Treatment plots have connectivity modules
    (conmods) installed to decrease gap size between perennials.  Buffer plots do not have conmods.
    Four 24-meter transects run through the plot and 2 buffer plots. These transects are spaced
    0.8, 2.8, 4.3, and 7.2 meters across the plots (denoted as 1, 3, 5, and 7 meters in the database),
    paralleling the long axis of the combined buffer plots and central plot.
         Aeolian site:         Control plots 2,4,5,8  Treatment plots 1,3,6,7
         Dona Ana site:        Control plots 2,4,5,7  Treatment plots 1,3,6,8
         Gravelly Ridges site: Control plots 1,3,5,7  Treatment plots 2,4,6,8
 

Data download: 

Description: 

Data file (CSV) for Jornada dataset: Conmod Pilot Study:  Annual vegetation transect Line Point Intercept measurements

Data file (CSV) for Jornada dataset: Conmod Pilot Study:  Annual vegetation transect Line Point Intercept measurements

Keywords: 

Dataset: 

Study number: 

308

Data set ID: 

210308001

Date range: 

2008-06-10 to 2012-06-28

Original investigator: 

Debra Peters

Data contact: 

Abstract: 

Canopy Gap and Basal Gap Intercept data are collected annually for this project beginning in 2008. No data were collected in 2011. There are 4 pairs of plots consisting of control and treatment. Each plot is 8x8 meters with an 8x8 meter buffer plot above and below it. Treatment plots have connectivity modules (conmods) installed to decrease gap size between perennials.
Buffer plots do not have conmods. Four 24-meter transects run through the plot and 2 buffer plots. These transects are spaced 0.8, 2.8, 4.3, and 7.2 meters across the plots (denoted as 1, 3, 5, and 7 meters in the database), paralleling the long axis of the combined buffer plots and central plot.
Aeolian site:                Control plots 2,4,5,8  Treatment plots 1,3,6,7
Dona Ana site:            Control plots 2,4,5,7  Treatment plots 1,3,6,8
Gravelly Ridges site:  Control plots 1,3,5,7  Treatment plots 2,4,6,8

Data download: 

Description: 

Data file (CSV) for the Jornada dataset: Conmod Pilot Study:  Annual plant canopy gap and basal gap intercept data

Data file (CSV) for the Jornada dataset: Conmod Pilot Study:  Annual plant canopy gap and basal gap intercept data

Keywords: 

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