uid=BNZ,o=lter,dc=ecoinformatics,dc=org all public read knb-lter-bnz.116.10 Knut Kielland

Institute of Arctic Biology University of Alaska Fairbanks P.O. Box 757000 Fairbanks AK 99775 United States

(907) 474-7164 (907) 474-6967 kkielland@alaska.edu http://www.iab.uaf.edu/~knut_kielland/ 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 Karl Olson

Institute of Arctic Biology University of Alaska Fairbanks P.O. Box 757000 Fairbanks AK 99775 United States

(907) 474-5540 Associated investigator 2003-03-14 Ammonium, Nitrate, and Amino Acid concentrations in .5M K2SO4 extracted T0 Tanana Floodplain soils Ammonium, Nitrate, and Amino Acid concentrations in .5M K2SO4 extracted T30 Tanana Floodplain soils Sodium Bicarbonate Extracted Tanana River Floodplain Soil Protein Concentrations, 2001 Plot locations for the Tanana River Floodplain DON buget study. GPS coordinates for the Tanana River Floodplain Dissolved Organic Nitrogen (DON) Budget Study plots GPS coordinates for the Tanana River Floodplain Dissolved Organic Nitrogen (DON) Budget Study plots. Readings were taken from the centre of each 30 X 30 meter plot (1DW3 is 45 X 20). The GPS unit (Garmin etrex Summit) indicated an accuracy of about +/- 5 meters. nitrogen nitrogen ammonium amino acids nitrate tanana river dissolved organic nitrogen 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=116 Site information unavailable -148.2701852 -148.1426888 64.73028888 64.6719571 2001-06-01 2001-10-06

Completed

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

This is a standard net mineralization study. Plots were laid out on a 30X30 meter grid within stands representative of the dominant vegetation at the sites listed. Cores were taken randomly from within the plots at the beginning and the end of each month, and analyzed according to the methods listed below.

From the sites mentioned, once per month we took sixteen cores (7.3 cm dia. X 10 cm) in pairs of eight. One core from each pair was brought back to the lab and extracted in .5 M K2SO4 and the extracts frozen for later analysis. The other cores were bagged in polyethylene bags and reinserted into the ground. About 30 days later these cores were retrieved from the field and brought to the lab for extraction in .5 M K2SO4 and the extracts frozen for later analysis. All extracts were analyzed on a technicon autoanalyzer for NH4+, No3-, and by the ninydrin technique for total amino acids, expressed as leucine equivalents.