uid=MCM,o=EDI,dc=edirepository,dc=org all public read SE_CO2 Stoichiometry Experiment - CO2 Ross Virginia
Hinman Box 6182 Hanover NH 03755 US
(603) 646-0192 ross.a.virginia@dartmouth.edu http://sites.dartmouth.edu/ravirginia/ https://orcid.org/0000-0002-0890-0981
Diana Wall
Johnson Hall 107 Fort Collins CO 80523 US
Diana.Wall@colostate.edu http://wp.natsci.colostate.edu/walllab/ https://orcid.org/0000-0002-9466-5235
McMurdo Dry Valleys LTER http://mcmlter.org/ Becky Ball Becky.Ball@asu.edu https://orcid.org/0000-0001-8592-1316 field crew Sue Welch welch.318@osu.edu https://byrd.osu.edu/people/welch.318 https://orcid.org/0000-0002-2890-0065 data manager Inigo San Gil
Department of Biology, MSC03 2020 University of New Mexico Albuquerque NM 87131 US
(505) 277-2625 (505) 277-2541 isangil@lternet.edu data manager
2014-01-01 English
Soil communities in the McMurdo Dry Valleys are subject to many limitations, including resource limitations. However, the nutrients that are predominantly limiting to growth and diversity of soil biota are not known. Additionally, landscape history (N deposition, P weathering) and native N and P content (glacial till provenance) may influence the ability of soil communities to respond to nutrient additions or changes in nutrient availability associated with environmental change. Long-term experiments in the Bonney and Fryxell basins have been established with yearly application of aqueous nutrient additions: C, N, P, CN, and CP. Multiple nutrients additions were made at the Redfield Ratio of 106:16:1 (C:N:P). Responses of soil chemistry, CO2 flux, and biota are reported.
carbon dioxide soil moisture soil temperature soil water content LTER Controlled Vocabulary Antarctica carbon CO2 LTER nematodes soil soil moisture soil temperature Stoichiometry Station Keywords population dynamics LTER Core Areas In the attribute table, the treatment is the manipulation for a given plot from which the soil was collected. The treatments are: (C) carbon additions as mannitol, (N) nitrogen additions as NH4NO3, (P) phosphorus additions as Na3PO4, (CN) carbon and nitrogen additions, (CP) carbon and phosphorus additions, (W) water-only additions, and (U) un-amended plots.
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https://mcm.lternet.edu/content/stoichiometry-experiment-co2 This is a core LTER study to determine the impact of changes in the availability of nutrient resources (carbon nitrogen and phosphorus) in the soil on biogeochemical cycling and soil biota. The experiment is being conducted in both Fryxell and Bonney Basin and was established in the 2006-2007 austral summer. 162.313003540039 162.313003540039 -77.725700378418 -77.725700378418 This is a core LTER study to determine the impact of changes in the availability of nutrient resources (carbon nitrogen and phosphorus) in the soil on biogeochemical cycling and soil biota. The experiment is being conducted in both Fryxell and Bonney Basin and was established in the 2006-2007 austral summer. 163.260437011719 163.260437011719 -77.608230590820 -77.608230590820 2003-01-26 2010-01-16 Jan, 2010 - Sue Welch created this metadata and accompanying Oracle data table from metadata info and an Excel spreadsheet from Becky Ball . McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER
Three sites were chosen on generally flat areas of moderately patterned soil. Plots were laid out in an identical design at each site. There are 7 treatments replicated 8 times in blocks. Treatments were randomly assigned to the plots within each block. Each plot measures 1 m x 1 m (with a 0.83 m diameter area within used for experimental treatments and analyses). Plots are delineated by nails inserted in the soil, and the margins of each site are marked by PVC stakes approximately 60 cm high. Water and aqueous nutrient treatments were applied annually at a rate of 5.6 L per plot, with 15 g C m-2 as mannitol, 2.5 g N m-2 as NH4NO3, and/or 0.75 g P m-2 as Na3PO4 (see Treatment Codes under Additional Information). Each plot was fitted with a 10-cm diameter PVC collar that created a seal with the soil. Soil CO2 flux from each PVC collar was measured using a LI-COR 8100 (Lincoln, NE), fitted with a soil respiration survey chamber. At each measurement, soil temperature in the surrounding soil was measured using soil temperature probe Type E. Soil moisture of the surrounding soil was measured using a Theta probe Model ML2. Measurements of CO2 flux, temperature, and moisture were taken within 2 weeks prior to annual treatment application, then again approx. 2 weeks after annual treatment application.
SOILS_SE_CO2 Details about the spreadsheet containing the SE data - units, columns, definitions, missing values and codes and the such SOILS_SE_CO2.csv 27461 28 1 \n column , " https://mcm.lternet.edu/sites/default/files/data/SOILS_SE_CO2.csv DATASET_CODE DATASET_CODE Unique identifier for the table in the MCM LTER database string Unique identifier for the table in the MCM LTER database BASIN BASIN The lake basin where the soil sample was collected from (Bonney or Fryxell). string Bonney Lake Bonney Basin Fryxell Lake Fryxell Basin SAMPLE_ID SAMPLE_ID The block and treatment combination of the sample. (C) carbon additions as mannitol (N) nitrogen additions as NH4NO3 (P) phosphorus additions as Na3PO4 (CN) carbon and nitrogen additions (CP) carbon and phosphorus additions, (W) water-only additions (U) un-amended plots. The numbers indicated the plot/block number string The block and treatment combination of the sample. (C) carbon additions as mannitol (N) nitrogen additions as NH4NO3 (P) phosphorus additions as Na3PO4 (CN) carbon and nitrogen additions (CP) carbon and phosphorus additions, (W) water-only additions (U) un-amended plots. The numbers indicated the plot/block number BLOCK_ID BLOCK_ID The block number that the soil sample was collected from. string The block number that the soil sample was collected from. TREATMENT TREATMENT The manipulation for a given plot from where the soil was collected. string C carbon additions as mannitol N nitrogen additions as NH4NO3 P phosphorus additions as Na3PO4 CN carbon and nitrogen additions CP carbon and phosphorus additions, W water-only additions U un-amended plots. PRE_DATE_TIME PRE_DATE_TIME The date and time CO2 flux was measured in the field before re-application of treatment date MM/DD/YYYY HH24:MI PRE_CO2 PRE_CO2 Soil CO2 flux measured using LI-8100 before re-application of treatment micromol CO2/m2sec real 0 Null None given PRE_TEMP PRE_TEMP Soil temperature at time of CO2 flux measurement before re-application of treatment celsius real 0 Null None given PRE_MOISTURE PRE_MOISTURE Soil moisture at time of CO2 flux measurement before re-application of treatment g/g soil real 0 100 Null None given POST_DATE_TIME POST_DATE_TIME The date and time CO2 flux was measured in the field after re-application of treatment date MM/DD/YYYY HH24:MI POST_CO2 POST_CO2 Soil CO2 flux measured using LI-8100 before re-application of treatment micromol CO2/m2sec real 0 Null None given POST_TEMP POST_TEMP Soil temperature at time of CO2 flux measurement after re-application of treatment celsius real 0 Null None given POST_MOISTURE POST_MOISTURE Soil moisture at time of CO2 flux measurement after re-application of treatment g/g soil real 0 100 Null None given COMMENTS COMMENTS Generic comments about the sample string Generic comments about the sample DATE_TIME DATE_TIME The date and time of the second measurement, same as POST_DATE_TIME date MM/DD/YYYY HH24:MI