Dataset Listing

Calhoun CZO - Soil Porosity, Soil Invertebrates (2015-2017)

Variables:  File1: Site, Depth, Bulk_density, %sand, %silt, %clay, K-sat, aggregate_stability; File2: Site, date, treatment, litter_or_mineral _soil, invertebrate_functional_group, Invertebrate_genus, invertebrate_spp.

Standard Variables:  Soil aggregate stability|Bulk density|Clay|Depth, soil|Soil invertebrates|Hydraulic Conductivity|Plant litter|Sand|Silt

Date Range:  (2015-09-22 to 2017-06-20)

Dataset Creators/Authors:  Brecheisen, Zachary S..; Callaham, M.A.; Heine, P.R.; Cook, Charles W.; Richter, Daniel deB.

Contact:  Zachary Brecheisen, Nicholas School of the Environment, Duke University, Box 90328 Durham NC 27708,

Field Area:   Calhoun CZO Research Area 1 | Calhoun CZO Research Area 4 | Calhoun CZO Research Area 7

Keywords & XML
  • Description

    Zachary Brecheisen, Dan Richter, Mac Callaham, Will Cook, and Paul Heine have sampled and analyzed soils from 15 locations in the Calhoun CZO. Sampling is underway, though all soil texture samples have been collected and are in process. The first quarterly invertebrate sampling occurred in September 2015. Bulk density, Ksat, and water stable aggregate sampling and analyses will occur in 2016. This work targets 3 different land forms: flat uplands, mid-slopes, and steeper slopes in 3 different land use comparisons. The land uses consist of 3 reference hardwood forests minimally degraded by human activity, 3 old-field secondary succession pine forests >60 yo, and 1 pseudo-replicated agricultural plot which has been, to the best of our knowledge, continually cultivated from the 1930’s at the latest. The goal of this sampling is to identify physical anthropogenic signals in the upper meters in the soil profile of cultivated lands and to evaluate their persistence or lack thereof in old-field pine forests relative to reference hardwoods.
    Properties analyzed/measured include water stable aggregates, texture, bulk density, Ksat, soil macroinvertebrates. Biological/invertebrate samples are collected from the litter and upper 30cm of the soil profile in a 30x30cm cube. Water stable aggregates, bulk density, and Ksat will be derived for at least the upper 2m of the profile. Soil texture is calculated from the surface to 5m depth. All of these analyses are performed at the same 15 locations as the gas sampling wells.
  • Keywords

    Bulk density, soil texture, K-sat, invertebrates, aggregates, porosity

    XML Metadata

    XML is in ISO-19115 geographic metadata format, compatible with ESRI Geoportal Server.

  • Citation for This Dataset

    Z.S. Brecheisen, M.A. Callaham, P.R. Heine, C.W. Cook, D. deB Richter, 2015, Soil eco-porosity analyses across landuse histories at the CCZO,

    Citation for This Webpage

    Brecheisen, Zachary S..; Callaham, M.A.; Heine, P.R.; Cook, Charles W.; Richter, Daniel deB. (2017). "CZO Dataset: Calhoun CZO - Soil Porosity, Soil Invertebrates (2015-2017)." Retrieved 05 Apr 2020, from


Research areas 1, 4, 7 - physical soil analyses

(xlsx)   Data Level 2,  [Private]

Research areas 1, 4, 7 - soil invertebrates

(xlsx)   Data Level 2,  [Private]

Data Use Policy
Data Sharing Policy
  • Data Use Policy

    DRAFT v.0.4.0

    1. Use our data freely. All CZO Data Products* except those labelled Private** are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you give acknowledgement as described below. Non-CZO data products — like those produced by USGS or NOAA — have their own use policies, which should be followed.

    2. Give proper citation and acknowledgement. Publications, models and data products that make use of these datasets must include proper citation and acknowledgement. Most importantly, provide a citation in a similar way as a journal article (i.e. author, title, year of publication, name of CZO “publisher”, edition or version, and URL or DOI access information. See Also include at least a brief acknowledgement such as: “Data were provided by the NSF-supported Southern Sierra Critical Zone Observatory” (replace with the appropriate observatory name).

    3. Let us know how you will use the data. The dataset creators would appreciate hearing of any plans to use the dataset. Consider consultation or collaboration with dataset creators.

    *CZO Data Products.  Defined as a data collected with any monetary or logistical support from a CZO.

    **Private. Most private data will be released to the public within 1-2 years, with some exceptionally challenging datasets up to 4 years. To inquire about potential earlier use, please contact us.

  • Data Sharing Policy

    DRAFT v.0.2.5

    All CZO investigators and collaborators who receive material or logistical support from a CZO agree to:

    1. Share data privately within 1 year. CZO investigators and collaborators agree to provide CZO Data Products* — including data files and metadata for raw, quality controlled and/or derived data — to CZO data managers within one year of collection of samples, in situ or experimental data. By default, data values will be held in a Private CZO Repository**, but metadata will be made public and will provide full attribution to the Dataset Creators†.

    2. Release data to public within 2 years. CZO Dataset Creators will be encouraged after one year to release data for public access. Dataset Creators may chose to publish or release data sooner.

    3. Request, in writing, data privacy up to 4 years. CZO PIs will review short written applications to extend data privacy beyond 2 years and up to 4 years from time of collection. Extensions beyond 3 years should not be the norm, and will be granted only for compelling cases.

    4. Consult with creators of private CZO datasets prior to use. In order to enable the collaborative vision of the CZO program, data in private CZO repositories will be available to other investigators and collaborators within that CZO. Releasing or publishing any derivative of such private data without explicit consent from the dataset creators will be considered a serious scientific ethics violation.

    * CZO Data Products. Defined as data collected with any monetary or logistical support from a CZO. Logistical support includes the use of any CZO sensors, sampling infrastructure, equipment, vehicles, or labor from a supported investigator, student or staff person. CZO Data Products can acknowledge multiple additional sources of support.

    ** Private CZO Repository. Defined as a password-protected directory on each CZO’s data server. Files will be accessible by all investigators and collaborators within the given CZO and logins will be maintained by that local CZO’s data managers. Although data values will not be accessible by the public or ingested into any central data system (i.e. CUAHSI HIS), metadata will be fully discoverable by the public. This provides the dual benefit of giving attribution and credit to dataset creators and the CZO in general, while maintaining protection of intellectual property while publications are pending.

    † Dataset Creators. Defined as the people who are responsible for designing, collecting, analyzing and providing quality assurance for a dataset. The creators of a dataset are analogous to the authors of a publication, and datasets should be cited in an analogous manner following the emerging international guidelines described at