Long-Term and Short-Term Data by Research Area

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Displaying 1 - 25 of 50 Research Projects

  • Dataset: Dryfall deposition chemistry data
  • Dataset: Wetfall deposition chemistry data


Project ID: 210169000
Abstract:

Atmospheric deposition as found in dryfall (dust) and wetfall precipitation has been collected and analyzed since 1983 using an Aerochem Metrics wetfall/dryfall collector located at the Jornada LTER weather station.

Wetfall occurring as precipitation is collected after each event with a sample size large enough to analyze. Dryfall is collected monthly. Each sample is analyzed for NO3, NH4, Cl, SO4, Ca, Mg,Na, K, Total N, & Total P. Inclusion of... more


  • Dataset: Conmod Pilot Study: BSNE Dust Collection Data
  • Dataset: Conmod Pilot Study: Connectivity Microplot Repeat Photos
  • Dataset: Conmod Pilot Study: Annual plant canopy gap and basal gap intercept data
  • Dataset: Conmod Pilot Study: Annual vegetation transect Line Point Intercept measurements


Project ID: 210308000
Abstract:
This study is designed to generate predictions about the density, spatial arrangement and cover of obstructions to wind and water necessary to promote grass recovery in
shrub-dominated plant communities in the northern Chihuahuan Desert.  Specifically, we would like to "(a) to understand the density of vegetation regrowth in intershrub areas(such as we have seen as a result oi last summer) necessary for it to become self-sustaining and engender... more

  • Dataset: Abrasion of Crust at Scrape Site


Project ID: 210122000
Abstract:

The project was designed to test the hypothesis that the abrasion of a surface crust is proportional to the vertical flux of kinetic energy delivered by saltating sand grains. This flux energy is related to the mass flux of saltating grains. The site was selected since it had a flat crust that was not greatly effected by atmospheric precipitation or freeze/ thaw and moistening/drying cycles. The objective of the project was to measure the kinetic energy flux during... more


  • Dataset: Ecotone Study: Quadrat Plant Measurement Data
  • Dataset: Ecotone Study: Plant Above Ground Net Primary Productivity by Site
  • Dataset: Ecotone Rodent 1st Capture Metrics (abundance, biomass, energy, species richness)
  • Dataset: Ecotone Study: Plant Above Ground Net Primary Productivity by Plant Form
  • Dataset: Ecotone Rodent Trapping 1st Capture


Project ID: 210262000
Abstract:

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... more


  • Dataset: East and west boundary fence plant line intercepts - percent cover for 9 species, Jornada Basin, 1982 to 1992


Project ID: 210120000
Abstract:

PURPOSE:

Investigate the response of vegetation with respect to landscape characteristics as well as release from grazing through vegetation monitoring across fence lines of grazed and ungrazed pastures.

INTRODUCTION.

In the spring of 1982, as part of the establishment of the Jornada Long-Term Ecological Research site in southern New Mexico, a 135 ha portion of a 1500 ha, internally drained, watershed was exclosed from grazing by... more


  • Dataset: Biodiversity tipping bucket rain gauge data - Daily Summary
  • Dataset: Biodiversity tipping bucket rain gauge data - By Event


Project ID: 210121000
Abstract:

Our understanding of ecological function in desert systems suggests that the physiological and morphological differences among species act as strong influences on resource capture and ecosystem modification; hence alteration of the composition or the relative abundances of species should alter availability and cycling of energy, water, and other resources. We initiated a long-term experiment in which the diversity of plant "functional types" and of plant species... more


  • Dataset: Estimated daily precipitation at the 15 ANPP sites: 1980-2010


Project ID: 210425000
Abstract:

The principal purpose is to provide daily precipitation at specific sites to assist the study of vegetation response over time. Estimated daily precipitation is calculated for each of 15 aboveground net primary productivity (ANPP) sites located in the 5 dominant vegetation zones on the Jornada Basin. The 15 sites were formally established in 1989 as LTER Study 268, but these rainfall estimates begin in 1980 using the closest rain gauge that provides a minimum... more


  • Dataset: Evaporation pan data beginning 1983 - Jornada LTER Weather Station


Project ID: 210127000
Abstract:

Surface evaporation is measured weekly to twice weekly using an evaporation pan compatible with standard National Weather Service evaporation measurements. Measurements are made twice per week during hot periods because of high evaporation rate. The following data is collected: number of days between measurements, beginning and ending measurement period, current, minimum, and maximum water temperature; initial water level; final water level; rainfall since last... more


  • Dataset: Plant Cover in Precipitation and Nitrogen Manipulation Plots on the Jornada Basin, 2007-2009
  • Dataset: Soil Water Content in Experimental Precipitation Manipulation Plots on the Jornada Basin, 2007-2009


Project ID: 210278000
Abstract:

On a continental scale, a strong spatial correlation between precipitation and aboveground net primary production (ANPP) gives us great confidence that precipitation is the primary driver of ANPP in arid and semi-arid ecosystems, which occupy nearly 40% of the Earth's land surface. However, as a series of comparable long-term data sets have become available in recent years, the relationship has not held up in a temporal context; annual precipitation accounts for... more


  • Dataset: Horizontal sand mass flux data Derived from 5-stage BSNE collectors at 15 NPP sites and Geomet site


Project ID: 210288000
Abstract:

Collections of airborne sand are obtained at 16 locations at the Jornada LTER area, the 15 NPP sites and the Geomet site. The collections are taken using BSNE collectors. The collectors are turned into the wind with wind vanes. The amount of material collected corresponds to the horizontalflux at the height of the collector and the opening area of the collector and the duration of the sampling time. The five heights of the BSNE collectors are 5, 10, 20, 50, and 100... more


  • Dataset: Hydrology natural runoff plots - runoff


Project ID: 210001000
Abstract:

Looking at infiltration and runoff rates as related to rain event duration and intensity as well as soil and organic movement as related below in creosotebush and grassland areas. Nine hydrology runoff plots were begun in 1983 during LTER-I and located in creosotebush zone. An additional 12 runoff plots have been added. These additions consist of 4 each at C-CALI, G-SUMM, and G-IBPE. G-SUMM and G-IBPE are blackgrama grassland sites. Refer to LTER site map for... more


  • Dataset: Precipitation Measured at Four Locations in the Tromble Watershed from 6/2010 to 10/2011
  • Dataset: Soil Moisture in the Tromble Watershed from 6/2010 to 10/2011


Project ID: 210338000
Abstract:

The seasonal variability in rainfall duration, intensity, and volume due to the North American Monsoon Season (NAMS) has been well documented in southwestern American semiarid landscapes.  The characteristic high intensity convective NAMS storm systems during the months of June-September lead to a greatly altered land surface in terms of soil moisture and vegetation.  However, large-scale investigation of the effects of land-surface changes on... more


  • Dataset: Monthly precipitation data from a network of standard gauges at the Jornada Experimental Range in southern New Mexico, January 1916 - October 2018


Project ID: 210380000
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.


  • Dataset: Jornada Experimental Range permanent quadrat chart data beginning 1915 - plant density


Project ID: 210351000
Abstract:
Permanent quadrats record vegetation changes since 1915 in a range of vegetation and soil texture types. More than 100 1 x 1 m**2 quadrats were set up between 1915 and 1932 to study the response of major forage species to cattle grazing and precipitation. A pantograph was used to chart the following variables:
  1. basal area of perennial grasses,
  2. locations of annual grasses, forbs, and shrubs, and sometimes
  3. canopy cover of... more

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