uid=BNZ,o=EDI,dc=edirepository,dc=org all public read knb-lter-bnz.89.21 John Yarie 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 uaf-bnz-im-team@alaska.edu http://www.lter.uaf.edu 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 uaf-bnz-im-team@alaska.edu http://www.lter.uaf.edu Lola Oliver Laboratory Supervisor, Forest Soils Lab

Forest Soils Laboratory University of Alaska Fairbanks O'Neill Bldg Fairbanks AK 99775-7200 United States

(907) 474-7114 (907) 474-6184 Associated party 1999-01-07 The nitrogen productivity (N-productivity) concept represents one approach for development of algorithms for expansion from the individual tree to stand or landscape levels of estimation of primary production across the earth's surface. A simple equation based on the N-productivity concept can be used to estimate plant production from the individual tree to stand level geographic units. Maximum N-productivity equations were developed for balsam poplar, white birch, and white spruce on an individual tree basis for the taiga of interior Alaska. Maximum N-productivity equations were also developed for aspen, balsam poplar, and white spruce on a unit area basis (m2). A single equation for all species sampled and individual stands was developed on a unit area basis. The calculated productivity for test stands was in close agreement to the measured productivity from the landscape perspective. The set of equations presented can be used for calculation of taiga forest productivity in a geographic model developed within a GIS software package in which the landscape unit is an integral part of the model structure. aboveground production Alaska aspen balsam poplar landscape nitrogen productivity taiga white birch white spruce Biogeochemistry

This work has been produced as part of the Long Term Ecological Research Program and data users should adhere to the Data Use Agreement of the Long Term Ecological Research Network. The consumer of these data (“Data User” herein) has an ethical obligation to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or coauthorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available “as is.” The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User should properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator(s), Year of Data Publication, Title of Dataset, Publisher, Dataset identifier, Dataset URL, Dataset DOI. For Example: Van Cleve, Keith; Chapin, F. Stuart; Ruess, Roger W. 2016. Bonanza Creek Experimental Forest: Hourly Temperature (sample, min, max) at 50 cm and 150 cm from 1988 to Present, Bonanza Creek LTER - University of Alaska Fairbanks. BNZ:1, http://www.lter.uaf.edu/data/data-detail/id/1. doi:10.6073/pasta/725db90d86686be13e6d6b2da5d61217.

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http://www.lter.uaf.edu/data/data-detail/id/89 Dataset geographic description information is unavailable. {datafile/geoCoverage is empty} -148.3790685 -148.1468545 64.7666796 64.6719571 1989-06-01 1993-09-30

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 uaf-bnz-im-team@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 Bonanza Creek LTER

A total of 239 white spruce(Picea glauca) , 24 aspen (Populus tremuloides), 58 white birch(Betula papyrifera), and 33 balsam poplar(Populus balsamifera) trees were available for calculation of the observed N productivity. The trees were randomly selected from a number of successional sites within the Bonanza Creek Experimental Forests(BNZ) Long-Term Ecological Research(LTER) program(unpublished data available on BNZ LTER World Wide Web home page) and Yarie and Van Cleve(1996). N productivity was calculated based on (1) midseason , green foliage(dry mass) N content for 1989 and (2) aboveground tree production based on the difference in calculated biomass between 1989 and 1993 converted to a yearly average. N productivity was calculated for all the sampled trees. The trees that represented maximum N productivity values for 2-cm diameter classes were selected for the N productivity analysis. This subset included 33 white spruce, 10 aspen, 14 white birch, and 26 balsam poplar, and represent the maximum N productivity. N productivity for individual trees was calculated by dividing estimated aboveground production by the foliar N content. Aboveground tree biomass was calculated by determining stemwood and foliage biomass for the hardwoods and total biomass for white spruce in 1993 and 1989. The biomass estimates were based on a set of allometric equations developed from sample trees within interior Alaska (Yarie et al., unpublished data). Annual production for hardwoods was calculated by subtracting the two stemwood biomass values and dividing by the number of years between the estimates of biomass. Foliage production for hardwoods was estimated as the biomass in both years and divided by two to obtain an average. Annual production for white spruce was estimated by calculating the difference in total biomass in 1993 and 1989 and then dividing by the number of years . This will result in a small decrease in total aboveground production for white spruce because litterfall was not included . This yielded a data set that was not associated with a specific landscapes unit but instead represented a range of site qualities.

FP2A -- FP2A is located adjacent to the LTER-2 weather station on a terrace that formed ca 1965.. Site alternate names: 221, GPIVC, GP4C, BCIV, VAC, VAT -148.2524731 -148.2524731 64.69878244 64.69878244 FP2C -- Tall Balsam Poplar w/ Alder Understory Stand. Site alternate names: 223, FSL-LD-FP2C_alder -148.2698825 -148.2698825 64.68689244 64.68689244 FP3A -- Mixed Balsam Poplar and White Spruce (Open Populus balsamifera-Picea glauca community). Site alternate names: 231, FSL-LD-FP3A_poplar -148.15094 -148.15094 64.72322993 64.72322993 FP3B -- Mixed Balsam Poplar and White Spruce (Open Populus balsamifera-Picea glauca community). Site alternate names: 232, FSL-LD-FP3B_poplar -148.2169588 -148.2169588 64.69355792 64.69355792 FP3C -- Mixed Balsam Poplar and White Spruce (Open Populus balsamifera-Picea glauca community). Site alternate names: 233, Eagle Site, FSL-LD-FP3C_poplar -148.2081387 -148.2081387 64.7081671 64.7081671 FP4A -- Mature white spruce. Site alternate names: 241, SMVIIIC, FSL-LD-FP4A_ws, VIIIWS, VIIIAC -148.2368605 -148.2368605 64.67878586 64.67878586 FP4B -- Mature white spruce. Site alternate names: 242, FSL-LD-FP4B_ws, VIIIYI, VIIIBC -148.2707843 -148.2707843 64.67129926 64.67129926 FP4C -- Mature white spruce. Site alternate names: 243, LV132, FSL-LD-FP4C_ws -148.1827217 -148.1827217 64.71354433 64.71354433 UP2A -- Closed Mixed White Spruce - Paper Birch Stand. Site alternate names: 121, LTER #121, FSL-LD-UP2A_birch -148.35568 -148.35568 64.69546067 64.69546067 UP2B -- Closed Mixed White Spruce - Paper Birch Stand. Site alternate names: 122, LTER #122, FSL-LD-UP2B_birch -148.3641664 -148.3641664 64.6905617 64.6905617 UP2C -- Closed Mixed Aspen - White Spruce Stand. Site alternate names: 123, FSL-LD-UP2C_aspen -148.3834237 -148.3834237 64.68927697 64.68927697 UP3A -- Mature white spruce spruce stand on a south-facing slope. Site alternate names: 131, LTER #131, Tower site: Parks Hwy, South side: Gregory stand #148, Zasada stand: Bonanza Creek - 1 (seed studies), Semi-intensive site #12, Juday, Parks Loop West, Tower Site, FSL-LD-UP3A_ws -148.2795018 -148.2795018 64.76742521 64.76742521 UP3B -- Closed White Spruce Forest. Site alternate names: 132, LTER #132, FSL-LD-UP3B_ws -148.2508148 -148.2508148 64.76051099 64.76051099 UP3C -- Closed White Spruce Forest. Site alternate names: 133, LTER #133, FSL-LD-UP3C_ws -148.3306337 -148.3306337 64.72538077 64.72538077 1989-06-01 1993-09-30

Once

Keith Van Cleve Bonanza Creek LTER Lead Principal Investigator Principal Investigator F.S. Stuart Chapin Bonanza Creek LTER Lead Principal Investigator

Department of Biology and Wildlife; Institute of Arctic Biology: University of Alaska Fairbanks 193 Arctic Health P.O. Box 757000 Fairbanks AK 99775 United States

(907) 455-6408 (907) 474-6967 terry.chapin@alaska.edu http://terrychapin.org/ Principal Investigator Roger W. Ruess Bonanza Creek LTER Lead Principal Investigator

Institute of Arctic Biology University of Alaska Fairbanks P.O. Box 757000 Fairbanks AK 99775-0180 United States

(907) 474-7153 (907) 474-6967 rwruess@alaska.edu http://www.iab.uaf.edu/~roger_ruess/ Principal Investigator Michelle Cailin Mack Bonanza Creek LTER Lead Principal Investigator

Northern Arizona University: Ecosystem Science and Society Center (ECOSS) PO Box 5620 Flagstaff AZ 86011 United States

(928) 523-9415 Michelle.Mack@nau.edu https://macklab.nau.edu/ Principal Investigator NSF Grant numbers DEB-2224776, DEB-1636476, DEB-1026415, DEB-0620579, DEB-0423442, DEB-0080609, DEB-9810217, DEB-9211769, DEB-8702629 USDA Forest Service, Pacific Northwest Research Station (Agreement # RJVA-PNW-20-JV-11261932-018) 98_biomassN.txt Measured N productivity for the control plots in the sites UP2, UP3, FP2, FP3, and FP4 of the BNZ-LTER study. The foliage biomass and foliage nitrogen were estimated in 1989. The annual production is an estimate of the production that occurred from 1989 through 1993 divided into an annual basis. 98_biomassN.txt 11 \n \n column \t http://www.lter.uaf.edu/php/download_data.php?f=/ascii/files/98_biomassN.txt Site Site Site ID string Site ID Species Species Species Code string Species Code abvgAnnualProd abvgAnnualProd Aboveground annual production float kilogramsPerSquareMeter real foliageBiomass foliageBiomass Foliage Biomass float kilogramsPerSquareMeter real Foliagenitrogen(%) Foliagenitrogen(%) Percent of foliage nitrogen float dimensionless real Nproductivity(kg growth/kg foliarN) Nproductivity(kg growth/kg foliarN) Nitrogen productivity(kg growth/kg foliarN) float kilogram real