Data Set Citation:
When using this data, please cite the data package:
NCEAS 2178: Jackson: Towards an explicit representation of root distributions in global models , National Center for Ecological Analysis and Synthesis , and Jackson R.
Global compilation of fine-root nutrient concentrations and root diameter
nceas.201.2 (https://knb.ecoinformatics.org:443/knb/metacat/nceas.201.2/nceas)
General Information:
Title:Global compilation of fine-root nutrient concentrations and root diameter
Identifier:nceas.201
Alternate Identifier:Appendix A; Appendix B
Abstract:
Fine roots are an important source and sink for nutrients in terrestrial ecosystems. Given the relatively short life-spans of fine roots, understanding the relationship between fine root diameter and nutrient contents, and the extent to which nutrients are retranslocated prior to turnover, is important for estimating nutrient cycling in terrestrial ecosystems. To study patterns of nutrient concentrations in fine roots, we examined published accounts for roots [less than or equal] mm in diameter, building on the database of Jackson et al. (1996, 1997). The synthesized studies included data from a range of ecosystems and biomes, including grass, shrub, and tree functional types from temperate, tropical, boreal, and tundra systems. The preponderance of data came from experiments with temperate and coniferous trees. Study sites were a mixture of natural and manipulated ecosystems, including old growth, secondary growth, old fields, and plantations. Data from fertilized systems were excluded, as were results from pot or greenhouse experiments and studies with seedlings. Criteria for inclusion were that each study provide information on root status (i.e., live, dead, or undifferentiated) and that if a range of root sizes were reported (e.g., 1-3 mm, 3-5 mm) the reported range did not exceed 2.5 mm. For information on the 56 studies used for the database and the spreadsheet used in the calculations see the Appendix. References: (1) Jackson, R. B., J. Canadell, J. R. Ehleringer, H. A. Mooney, O. E. Sala, and E.-D. Schulze. 1996. A global analysis of root distributions for terrestrial biomes. Oecologia 108:389-411. (2) Jackson, R. B., H. A. Mooney, and E.-D. Schulze. 1997. A global budget for fine root biomass, surface area, and nutrient contents. Proceedings of the National Academy of Sciences, USA 94:7362-7366.
Keywords:none:
  • C:N:P ratios (theme)
none:
  • coniferous trees (theme)
none:
  • broadleaf trees (theme)
none:
  • fine roots (theme)
none:
  • nutrient concentrations (theme)
none:
  • retranslocation (theme)
none:
  • calcium (theme)
none:
  • carbon (theme)
none:
  • magnesium (theme)
none:
  • nitrogen (theme)
none:
  • phosphorus (theme)
none:
  • potassium (theme)

Involved Parties

Data Set Creators:
Organization:NCEAS 2178: Jackson: Towards an explicit representation of root distributions in global models
Organization:National Center for Ecological Analysis and Synthesis
Individual: Robert B. Jackson
Address:
Austin, Texas 78713-7640 USA
Phone:
(512) 471-5858 (voice)
Phone:
(512) 471-3878 (Fax)
Email Address:
rjackson@mail.utexas.edu
Data Set Contacts:
Individual: Robert B. Jackson
Address:
Austin, Texas 78713-7640 USA
Phone:
(512) 471-5858 (voice)
Phone:
(512) 471-3878 (Fax)
Email Address:
rjackson@mail.utexas.edu
Associated Parties:
Individual: Wendy S. Gordon
Metadata Providers:
Individual: Andrea Chadden

Data Set Characteristics

Geographic Region:
Geographic Description:Various locations worldwide: eastern Europe, Europe, various places in the continental United States, Scotland, Puerto Rico, Soviet Union, Quebec, India, Australia, southern Belgium, Estonia, Sweden, Germany, Brazil, southeast Norway, Peru, Vancouver, West Africa, Ontario, the Netherlands, Alaska.
Bounding Coordinates:
West:  -127.833055555556  degrees
East:  148.933055555556  degrees
North:  60.8166666666667  degrees
South:  -35.35  degrees
Time Period:
Begin:
1959-01-01
End:
1997-12-31

Sampling, Processing and Quality Control Methods

Data Set Usage Rights

no restrictions
Access Control:
Auth System:knb
Order:denyFirst
Metadata download: Ecological Metadata Language (EML) File