| Title: |
The impact of permafrost thaw on ecosystem carbon balance: Plant species composition and productivity following permafrost thaw and thermokarst in Alaskan tundra
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| Contacts: |
Schuur, Edward
Crummer, Kathryn
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| Abstract: |
In this larger study, we are asking the question: Is old carbon that comprises the bulk of the soil organic matter pool released in response to thawing of permafrost? We are answering this question by using a combination of field and laboratory experiments to measure radiocarbon isotope ratios in soil organic matter, soil respiration, and dissolved organic carbon, in tundra ecosystems. The objective of these proposed measurements is to develop a mechanistic understanding of the SOM sources contributing to C losses following permafrost thawing. We are making these measurements at an established tundra field site near Healy, Alaska in the foothills of the Alaska Range. Field measurements center on a natural experiment where permafrost has been observed to warm and thaw over the past several decades. This area represents a gradient of sites each with a different degree of change due to permafrost thawing. As such, this area is unique for addressing questions at the time and spatial scales relevant for change in arctic ecosystems. This dataset reports aboveground biomass and aboveground net primary productivity for three sites across a gradient of permafrost thaw, as well as foliar nitrogen and foliar stable nitrogen isotopes for a subset of the plant species.
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| Keywords: |
aboveground production, foliar nitrogen, net primary production, nitrogen isotopes, plant biomass, |
| Categories: |
Biogeochemistry
Climate
Decomposition
Disturbance
GIS
Hydrology
Primary Production
Soils
Succession
Vegetation
Water Quality
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| Study Period: |
Jul 25, 2004 to Jul 31, 2004
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| Bounding Box: |
West longitude: 149.2535833°
North latitude: 63.87836111°
East longitude: 149.2535833°
South latitude: 63.87836111°
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| Site References: |
EML -- Tussock tundra at treeline with permafrost thaw and thermokarst
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| Data Columns: |
| Column |
Name |
Units |
Type |
| 1 |
Site |
|
string |
| 2 |
Chamber |
|
string |
| 3 |
Species/Fxn Group/ Total |
|
string |
| 4 |
Fxn Grp |
|
string |
| 5 |
g/m2 all |
g/m2 |
float |
| 6 |
g/m2 lf |
g/m2 |
float |
| 7 |
g/m2 NPP |
g/m2 |
float |
| 8 |
%AG |
% |
float |
| 9 |
%PS |
% |
float |
| 10 |
delta 15N |
per mil |
float |
| 11 |
delta 13C |
per mil |
float |
| 12 |
%N |
% |
float |
| 13 |
%C |
% |
float |
|
| Data File(s): |
348_Healy04_BiomassNPP.txt
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| Supplemental Files: |
|
| Metadata Formats: |
|
| Public Release: |
Jan 1, 2009
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| Publications: |
Schuur, E.A.G., K.G. Crummer, J.G. Vogel, and M.C. Mack. 2007. Plant Species Composition and Productivity following Permafrost Thaw and Thermokarst in Alaskan Tundra. Ecosystems. DOI:10.1007/s10021-007-9024-0
Schuur, E.A.G., J. Bockheim, J. Canadell, E. Euskirchen, C.B. Field, S.V Goryachkin, S. Hagemann, P. Kuhry, P. Lafleur, H. Lee, G. Mazhitova, F. E. Nelson, A. Rinke, V. Romanovsky, N. Shiklomanov, C. Tarnocai, S. Venevsky, J. G. Vogel, S.A. Zimov. 2008. Vulnerability of permafrost carbon to climate change: Implications for the global carbon cycle. BioScience 58(8): 701-714. doi:10.1641/B580807
Schuur, E.A.G., J.G. Vogel, K.G. Crummer, K. Dutta, H. Lee, C. Trucco, and J. Sickman. 2007. Using Radiocarbon to Detect Change in Ecosystem Carbon Cycling in Response to Permafrost Thawing. Physical Environment and Sciences. p36-38.
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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 23-Nov-09
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