Respiration in soils collected from the REU synoptic sample grid in the Andrews Experimental Forest, 1994-1995

  • Creator(s): Robert P. Griffiths
  • PI(s): Robert P. Griffiths
  • Originator(s): Robert P. Griffiths
  • Other researcher(s):
  • Dates of data collection: Sep 15 1994 - Dec 7 1995
  • Data collection status: Study collection is completed and no new collection is planned
  • Data access: Online
  • DOI:
  • Access constraint: If data used in publication, the PI will be listed as a coauthor. Whenever these data are presented in whatever form, the PI will be acknowledged.
  • Last update: Aug 7 2019 (Version 9)
<Citation>     <Acknowledgement>     <Disclaimer>    
Griffiths, R. 2019. Respiration in soils collected from the REU synoptic sample grid in the Andrews Experimental Forest, 1994-1995. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2023-12-11.
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
The 1993 (SP005) sampling grid was expanded to 183 sites providing a more comprehensive sampling grid. Because of potential edge effects problems, all sample locations were moved at least 20 meters from the closest road or clearing. Changes from the original location are given in entity 2. CO2 is measured over a period of 41 weeks in soils collected from all of the REU synoptic sample sites in the summer of 1994. Soils were weighted at the same time that respiration was assayed and moisture content was maintained at the same level throughout the series. The time period represented by this data is 15 September 1994 to 12 July 1995. In the initial stages, CO2 concentrations were assayed every week, after 15 weeks, the incubation period was extended to 2 weeks. After the incubation vessels were assayed, the headspace was flushed with lab air and the moisture was adjusted with sterile deionized water. Results show that there was a very high correlation between respiration rates during the 1st and 3rd weeks (r = 0.96) suggesting that the two week incubation period we us as an indicator of initial concentrations of labile carbon is valid. There was also a high correlation between rates observed within the first week and rates observed after 41 weeks (r = 0.85) suggesting that the initial rates provide a good relative guide to rates observed after 10 months. In addition, respiration rates after 41 weeks were 80% of those observed during the first week.

Study Description Study Site Map Taxonomic Hierarchy Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Long-term respiration in soils collected from the REU synoptic Andrews sample grid (Sep 15 1994 - Jul 12 1995)METADATADATA
2Soil synoptic grid site characteristics, locations and descriptions (Sep 15 1994 - Jul 12 1995)METADATADATA
3Vegetation on soil synoptic sample grid (Sep 15 1994 - Jul 12 1995)METADATADATA

 Synoptic soil respiration of permanent forest sites in the Andrews Experimental Forest (1993 REU Study) (SP005)
 Chemical and microbiological properties of soils in the Andrews Experimental Forest (1994 REU Study) (SP006)
 Soils synoptic sampling grid (REU sites) site locations, Andrews Experimental Forest, 1993-2005 (SP028)
 Effects of topography on soil characteristics in the Andrews Experimental Forest, 1998 (SP020)