uid=BNZ,o=lter,dc=ecoinformatics,dc=org all public read knb-lter-bnz.326.9 Merritt R Turetsky Assistant Professor

Department of Integrative Biology University of Guelph Guelph ON N1G 2W1 Canada

519-824-4120 ext 56166 mrt@uoguelph.ca http://www.uoguelph.ca/ib/people/faculty/turetsky.shtml Bonanza Creek LTER Data Manager

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 jpdowning@alaska.edu http://www.lter.uaf.edu Claire C Treat Research Technician

Dept. Plant Biology; Michigan State University East Lansing Michigan 48824 United States

517-353-2953 517-353-1926 Associated investigator Molly R. Conlin

166 Plant Biology Lab East Lansing Michigan 48824 United States

(517)-353-2953 Associated investigator Evan S. Kane

Michigan State University Dept. of Plant Biology East Lansing MI 48824 USA

(907) 474-7471 Associated investigator Sara J. Klapstein Master's Graduate student

Integrative Biology, Science Complex Rm 2408, University of Guelph Guelph Ontario N1G 2W5 Canada

Associated investigator 2011-10-06 Methane fluxes were collected at APEX rich fen during the summers of 2005 - 2011. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment). peatland experimental warming wetlands soil climate manipulation water table manipulation methane Biogeochemistry

While metadata will be freely available to those requesting it, the data manager will assure that any restrictions on access to data sets in the database will be enforced. Data will not be released without proper permission first being obtained from the investigator who generated the data.

Researchers should receive adequate acknowledgment for the use of their data by others and should be provided with copies of publications using their data. Users of data from the data base must be aware that data is not to be sold or redistributed.

It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set.

http://www.lter.uaf.edu/data_detail.cfm?datafile_pkey=326 Site information unavailable -148.31034 -148.31034 64.70138 64.70138 2005-06-16 2011-09-15

Gas fluxes not near zero that did not show a trend (9%) were discarded.

Ongoing

Bonanza Creek LTER Data Manager

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 jpdowning@alaska.edu http://www.lter.uaf.edu Bonanza Creek LTER

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 Bonanza Creek LTER

APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment). Water table treatments were randomly assigned to each plot. Permanent gas measurement collars were established within these plots and randomly assigned to a warming treatment.

Data were collected from 18 collars located within the water table by warming treatments at APEX Fen as described above. Moisuture gradient collars range from a black spruce site (Gradient 1), a site dominated by willow-birch shrubs (Gradient 2), a tussock site (Gradient 3, located on a tussock), and a site dominated by equisetum and carex (Gradient 4). Methane samples were collected weekly to bi-weekly from clear static chambers (60 cm x 60 cm x 60 cm) placed on collars that are permanently embedded in the peat. Collars were sealed using foam tape. Gas samples were collected into 20 mL syringes over a period of 30 -40 minutes and analyzed for methane concentrations using a GC equipped with an FID detector. Gas fluxes not near zero that did not show a trend (9%) were discarded. Samples were analyzed for methane concentrations using a gas chromatograph equipped with a flame ionization detector (FID).

geoReference 2005-06-16 2011-09-15

Weekly

326_APEX_fen_methane_flux_2005-2006.txt Methane fluxes from an Alaskan rich fen 326_APEX_fen_methane_flux_2005-2006.txt 1 \n \n column \t http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-bnz..&urlTail=/ascii/files/326_APEX_fen_methane_flux_2005-2006.txt year year Year of sampling integer dimensionless real date date date of sampling (yyyy-mm-dd) string dimensionless JD JD Day of year of sampling (DOY) integer dimensionless real hour hour time of sampling, rounded to nearest hour integer dimensionless real Plot Plot water table manipulation plot string Control control treatment Lowered lowered or drained treatment Raised raised or flooded treatment Gradient gradient or moisture gradient collar collar permanent collar embedded in peat, identifier of measurement location integer permanent collar embedded in peat, identifier of measurement location warm warm whether the collar was assigned to warming treatment with an open-topped chamber string yes warmed no unwarmed CH4 flux CH4 flux Volumetric methane flux float mgCH4/m2/d real -1000.000 10000.000 r2 r2 R2 value float dimensionless real