Long-Term and Short-Term Data by Research Area

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soil projects

Displaying 1 - 9 of 9 Research Projects

  • Dataset: Conmod Pilot Study: Connectivity Microplot Repeat Photos
  • Dataset: Conmod Pilot Study: BSNE Dust Collection Data


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: 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: 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: NPP Soil Water Content
  • Dataset: NPP Soil Water Content Raw Data
  • Dataset: Soil Volumetric Water Content at the 15 NPP Sites of the Jornada Basin LTER from 1989


Project ID: 210013000
Abstract:

Once a month 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 (Campbell Model 503DR Hydroprobe). Measurements are taken at 30cm, 60cm, 90cm, 120cm, 150cm, 180cm, 210cm, 240cm, 270cm, and 300cm when possible or to the greatest depth it was possible to install the access tubing before hitting a layer of impenetrable caliche. Converted water content values are a... more


  • Dataset: Horizontal sediment mass flux before & after the windy season from vegetation removal plots(Sediment weight at various heights)


Project ID: 210301000
Abstract:

In a large-scale grass removal experiment (NEAT), we identified several important thresholds that impact the conversion of grasslands to shrublands. Between 75%-100% grass loss, aeolian transport increases dramatically, but carbon and nitrogen in windborne sediment display another threshold between 50%-75% grass loss (Li et al. 2007). With lower grass cover, nutrient additions to the soil are overwhelmed by aeolian emissions, resulting in a net loss of soil... more


  • Dataset: Soil movement across black grama-mesquite ecotones beginning in 1933


Project ID: 210365000
Abstract:

In 1933 and 1935, two transects were established in the Natural Revegetation Exclosure and Pasture 8b, respectively, to measure long-term soil movement in areas undergoing mesquite invasion. These two transects, established in a Prosopis-Bouteloua ecotone, were to: "measure any future changes in the extent or succession of three contiguous zones of vegetation, Bouteloua eriopoda, Gutierrezia, and Prosopis glandulosa dunes. Thus, future chartings of this transect... more


  • Dataset: Transect Soil Water Content Raw Count Data
  • Dataset: Transect Soil Water Content


Project ID: 210012000
Abstract:

Soil water content measurements are made at 5 depths at each of 89 (2" O.D. diameter) aluminum access tubes on the Control transect and at every 5th station (19 access tubes) on the nitrogen fertilized Treatment transect using a neutron probe (Campbell Model 503DR Hydroprobe). Transects are 2.7 km in length and run parallel to each other with the center line of each transect approximately 75 meters apart. Stations are 30 meters apart. Measurements are taken at 30cm... more