| Title: |
Growing Season D and 18O isotope data for a core from the center and moat of the BBC collapse scar: Bonanza Creek Experimental Forest Flood Plains
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| Contacts: |
Myers-Smith, Isla
McGuire, A.
Harden, Jennifer
Chapin, F.S.
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| 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.
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| Keywords: |
bog, chemistry, deuterium, isotope, moat, oxygen, sphagnum, transect, |
| Categories: |
Biogeochemistry
Water Quality
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| Study Period: |
May 1, 2003 to Sep 1, 2003
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| Bounding Box: |
West longitude: -148.3334833°
North latitude: 64.6408°
East longitude: -148.3334833°
South latitude: 64.6408°
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| Site References: |
BBC collapse scar -- 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.
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| Data Columns: |
| Column |
Name |
Units |
Type |
| 1 |
Year |
yyyy |
Datetime |
| 2 |
DOY |
DOY |
Datetime |
| 3 |
Distance (m) |
meter |
Integer |
| 4 |
Side of Transect |
none |
Character |
| 5 |
Depth (cm) |
centimeter |
Integer |
| 6 |
Sample Name |
none |
Character |
| 7 |
Sample ID |
none |
Character |
| 8 |
Sample Type |
none |
Character |
| 9 |
Mean Deuterium (‰) |
‰ |
Numeric (p) |
| 10 |
Standard Error D (‰) |
‰ |
Numeric (p) |
| 11 |
Mean Oxygen 18 (‰) |
‰ |
Numeric (p) |
| 12 |
Standard Error 18O (‰) |
‰ |
Numeric (p) |
| 13 |
Moss Type 1 |
none |
Integer |
| 14 |
Moss Type 2 |
none |
Integer |
| 15 |
Moss Type 3 |
none |
Integer |
|
| Data File(s): |
239_2069_samples_d_and_18o_isotope.txt
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| Supplemental Files: |
|
| Metadata Formats: |
|
| Public Release: |
Nov 24, 2005
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| Publications: |
Myers-Smith, I., A.D. McGuire, J.W. Harden, and F.S. Chapin III. 2007. The influence of disturbance on carbon exchange in a permafrost collapse and adjacent burned forest. Journal of Geophysical Research - Biosciences 112, G04017, doi:10.1029 2007JG000423.
Myers-Smith, I.H., J.W. Harden, M. Wilmking, C.C. Fuller, A.D. McGuire, and F.S. Chapin, III. 2007. Wetland succession in a permafrost collapse: Interactions between fire and thermokarst. Biogeosciences Discussion 4:4507-4538.
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The Bonanza Creek LTER, including this website, is supported by the
National Science Foundation through awards
DEB-0620579,
DEB-0423442,
DEB-0080609,
DEB-9810217,
DEB-9211769,
DEB-8702629
and by the USDA Forest Service, Pacific Northwest Research Station through agreement number RJVA-PNW-01-JV-11261952-231.
Any opinions, findings, conclusions, or recommendations expressed in the
material are those of the author(s) and do not necessarily reflect
the views of the supporting agencies or the program as a whole.
© Bonanza Creek LTER, 2009.
Last modified 22-Nov-09
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Disclaimer
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