BNZ-LTER Metadata Catalog

Title:

Raw D and 18O isotope data for a core from the center and moat of the BBC collapse scar: Bonanza Creek Experimental Forest Flood Plains

Contacts:

Chapin, F. Stuart
Telephone (primary): (907) 455-6408
Telephone (secondary): NA
FAX: (907) 474-6967
Email (primary): terry.chapin@alaska.edu
Email (secondary): NA
Web URL: https://sites.google.com/alaska.edu/f-stuart-chapin-iii-terry/
Address:
Institute of Arctic Biology: University of Alaska Fairbanks
Fairbanks, AK 99775
United States

Harden, Jennifer W.
Telephone (primary): (650) 329-4949
Telephone (secondary): (650) 329-5292
FAX: (650) 329-4920
Email (primary): jharden@usgs.gov
Email (secondary): NA
Web URL: https://profile.usgs.gov/jharden
Address:
U.S. Geological Survey 345 Middlefield Road, MS 962
Menlo Park, CA 94025
United States

McGuire, A. David
Telephone (primary): (907) 474-6242
Telephone (secondary): NA
FAX: (907) 474-7872
Email (primary): admcguire@alaska.edu
Email (secondary): NA
Web URL: http://people.iab.uaf.edu/dave_mcguire
Address:
Alaska Cooperative Fish and Wildlife Research Unit University of Alaska Fairbanks Irving I Building
Fairbanks, AK 99775
United States

Myers-Smith, Isla
Telephone (primary): (780) 492-1295
Telephone (secondary): NA
FAX: NA
Email (primary): myerssmi@ualberta.ca
Email (secondary): NA
Web URL: http://www.ualberta.ca/~myerssmi/home.html
Address:
405 CW Biological Sciences Building, Dept. Biological Sciences University of Alberta, , AB, T6G 2E9
Edmonton, Aberta T6G 2E9
Canada

Abstract:

This data set contains D and 18O data for a core from the center and moat (0 and 6 m) of the BBC collapse scar. Two well-preserved cores from the center of the bog was collected in March 2003 with a gasoline-powered permafrost corer. Cores were stored frozen and sampled using a radial saw. The core was sampled every two cm for macrofossil, diatom analysis and chemistry. Oxygen isotope ratios in aquatic cellulose has been shown to be a reliable tracer of lakewater isotope ratios (Sauer et al., 2001). I predicted that ?D and ?18O signatures in Sphagnum leaves would respond to enrichment and depletion in the bog water over time, providing an independent line of evidence for diatom-inferred hydrologic change. All isotope samples were processed by the Alaska Stable Isotope Facility using a Thermo Finnigan TC EA and Deltaplus XL mass spectrometer (Thermo Electron Corporation, Bremen, Germany) in continuous flow mode. Data were reported relative to standard mean ocean water (SMOW). Instrument precision was 1.2 ? SE for ?D and 0.3 ? SE for ?18O. I separated Sphagnum leaves from the bog and moat cores, and ran whole organic matter samples for ?D and ?18O stable isotopes. To determine the correlation between ?D and ?18O stable isotopes in peat leaves and bog water, I analyzed samples of Sphagnum and adjacent surface water. I collected surface water samples without headspace and refrigerated at 4 ?C until sample analysis. Snow samples were kept frozen until analysis. I refrigerated surface sample Sphagnum leaves from branches directly below the capitulum after harvest until analysis for ?D and ?18O stable isotopes. I identified Sphagnum samples to species. This data set was collected to relate ?D and ?18O to fires, changes in succession, changes in hydrology, and diatom assemblages.

Methods:

Field methods: This data set contains D and 18O data for a core from the center and moat (0 and 6 m) of the BBC collapse scar. Two well-preserved cores from the center of the bog was collected in March 2003 with a gasoline-powered permafrost corer. Cores were stored frozen and sampled using a radial saw. The core was sampled every two cm for macrofossil, diatom analysis and chemistry. Lab methods: All isotope samples were processed by the Alaska Stable Isotope Facility using a Thermo Finnigan TC EA and Deltaplus XL mass spectrometer (Thermo Electron Corporation, Bremen, Germany) in continuous flow mode. Data were reported relative to standard mean ocean water (SMOW). Instrument precision was 1.2 ? SE for ?D and 0.3 ? SE for ?18O. I separated Sphagnum leaves from the bog and moat cores, and ran whole organic matter samples for ?D and ?18O stable isotopes. To determine the correlation between ?D and ?18O stable isotopes in peat leaves and bog water, I analyzed samples of Sphagnum and adjacent surface water. I collected surface water samples without headspace and refrigerated at 4 ?C until sample analysis. Snow samples were kept frozen until analysis. I refrigerated surface sample Sphagnum leaves from branches directly below the capitulum after harvest until analysis for ?D and ?18O stable isotopes. I identified Sphagnum samples to species. Instrumentation used: Thermo Finnigan TC EA and Deltaplus XL mass spectrometer (Thermo Electron Corporation, Bremen, Germany) in continuous flow mode.

Experimental Design:

None on file.

Supplemental Documentation:

None on file.

Corrections:

None on file.

Supplemental Acknowledgements:

This research was funded by the USGS Earth Surface Dynamics Program and the Bonanza Creek LTER (Long-Term Ecological Research) program (funded jointly by NSF grant DEB-0423442 and USDA Forest Service, Pacific Northwest Research Station grant PNW01-JV11261952-231). Data collection was conducted by Isla Myers-Smith, Jennifer Harden, A. David McGuire, Jamie Hollingsworth and others. Samples were processed by Isla Myers-Smith, Kaarle Strailey and the Alaska Stable Isotope Facility.

Keywords:

bogs, chemistry, deuterium, isotopes, moat, oxygen, sphagnum, transects

Categories:

Biogeochemistry, Water Quality

Study Period:

2003-03-01 to 2003-03-29

Sampling Frequency:

once

Bounding Box:

West Longitude: -148.3334833°
North Latitude: 64.6408°
East Longitude: -148.3334833°
South Latitude: 64.6408°
Datum:

Site References:

Site ID: BBC collapse scar
Description: The BBC collapse scar is located in Interior Alaska, USA, adjacent to the Bonanza Creek LTER on the south side of the Tanana River, approximately half way between Fairbanks and Nenana. The scar is located 0.5 km south of the river bank in a low lying black spruce tussock dominated wetland that was burned in June-July 2001 by the Survey Line fire.
Directions: Tanana Floodplain, Interior Alaska
Site History: Burned in June-July 2001 by the Survey Line fire
Location: NA

Data Columns:

Column: 1
Variable Name: Sample Name
Description: Sample name used
Units: NA
Type: string
Measurement Scale: nominal
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 2
Variable Name: Sample ID
Description: Sample identification used by the Harden Lab at the USGS in Menlo Park
Units: NA
Type: string
Measurement Scale: nominal
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 3
Variable Name: Ecotone
Description: Ecological type along the transect (bog, moat or burn)
Units: NA
Type: string
Measurement Scale: nominal
Value Codes: Ecotone: bog, moat, or burn
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 4
Variable Name: Distance along transect (m)
Description: Distance along the transect (0-30m)
Units: meter
Type: Integer
Measurement Scale: ordinal
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 5
Variable Name: Depth (cm)
Description: Depth of sample in the soil profile (in cm)
Units: centimeter
Type: Integer
Measurement Scale: ratio
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 6
Variable Name: Date Run
Description: The date that the isotope analysis was run (yyyy/mm)
Units: yyyy/mm
Type: string
Measurement Scale: date-time
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 7
Variable Name: Deuterium (%)
Description: Deuterium (D or 2H reported per mil)
Units: %
Type: float
Measurement Scale: ratio
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Column: 8
Variable Name: Oxygen 18 (%)
Description: Oxygen 18 (18O reported per mil)
Units: %
Type: float
Measurement Scale: ratio
Value Codes: NA
Error Codes: -9999
Minimum Valid Value: NA
Maximum Valid Value: NA
Output Precision:
Calculations:

Public Release:

2005-11-24