uid=BNZ,o=EDI,dc=edirepository,dc=org all public read knb-lter-bnz.209.19 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 1991-08-15 The chemical composition of soil solution reflects solubility and ion exchange equilibria between a number of physical and biological components of the soil. The objectives of this study were to document soil solution chemistry for representative phases of the primary successional sequence on the Tanana River floodplain and to assess the effect of vegetation clearing in these sites. Soil solution samples were collected on a weekly basis using porous cup soil solution samplers located at 20, 50, and 150 cm below the soil surface. In addition, ground water and river water samples were collected at several sites which represented the successional stages typical of the Tanana River floodplain of interior Alaska. Magnesium, HCO3, Cl, Na, K, NO3, and PO4 showed the highest concentrations in the 50 cm layer at each site. Manganese, Fe, and Zn showed highest concentrations at the ground water level. Aluminum, and Ca showed decreasing concentrations with depth from the surface. Silicon displayed no specific depth trends. Ammonium was the only ion which was more concentrated in river water than in soil solution. Soil solution pH tended to show no specific depth trends. Conductivity of the soil solution was generally lower at deeper depths and was much lower in the river water. Sulfate, potassium, calcium, and manganese decreased in concentration from the early successional stages to the later successional stages, although some year to year variability did occur. All chemical parameters except zinc displayed at least one significant change in concentration due to vegetation clearing. These differences can be summarized broadly as effects on non-biologically cycled nutrients in the open shrub willow stage (III) and changes in the biological cycling of nutrients in the poplar-alder and mature white spruce stages (V and VIII, respectively). The stage V sites displayed the greatest response to treatment. In general the Stage V-A sites displayed significant increases, as a result of clearing, in concentrations of NH4, PO4, SO4, K, Na, Ca, Mg, Mn, Fe, Al, Si, HCO3, and conductivity in 1987 and 1988; with the exception of Fe and Si in 1988. Chloride decreased in the poplar-alder stage V-A sites in 1987 but increased in 1988. The V-B poplar-alder sites showed no effect of treatment in 1988 and only NO3, SO4, Ca, Mg, and conductivity increased in 1987. Chloride, Al and Si decreased as a result of treatment in 1987 on the stage V-B poplar-alder sites. Nitrate, NH4, Cl, and pH increased, while PO4, K, Na, Ca, Mg, Si, HCO3, and conductivity all decreased as a result of clearing in the mature white spruce site VIII-AT. These trends were similar in 1988. At the VIII-BT site NO3, K, Ca, Mg, Cl, HCO3, and conductivity increased as a result of clearing in 1987; while only NO3 increased in 1988. Bicarbonate, Cl, and pH did show significant decreases in 1987 in the VIII-BT site which were repeated in 1988. The results of this study combined with the results of other studies detailing the soil environment and control of evaporative movement of water to the soil surface support the hypotheses that; (1) soil solution salt concentrations were sufficiently high to affect seedling germination and growth on the early successional sites, (2) the genesis and maintenance of surface salt crusts are controlled by the soil physical and chemical environments encountered on early successional mineral seed beds, and (3) the disappearance of salt crusts and reduction in mineral soil salt concentrations is controlled by forest succession which mediates the changing soil physical, chemical, and biological environment. calcium cations groundwater ions magnesium nitrogen nutrients phosphorus sulfur water chemistry 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/209 Dataset geographic description information is unavailable. {datafile/geoCoverage is empty} -148.264909 -148.1532447 64.7050112 64.6719571 1985-07-03 1988-08-16

Study sites: III-A and III-B treated and control (ie AC, BC, AT, and BT) V-A and V-B treated and control (ie AC, BC, AT, and BT) VIII-A and VIII-B treated and control (ie AC, BC, AT, and BT) see Viereck et al. 1993

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 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) 17_2076_1985_1988_soil_nutrient.txt The chemical composition of soil components. 17_2076_1985_1988_soil_nutrient.txt 1 \n \n column \t http://www.lter.uaf.edu/php/download_data.php?f=/ascii/files/17_2076_1985_1988_soil_nutrient.txt Date Date Date of sample string ddmmyy Site Site Site location string Site location Depth Depth Depth in cm string Depth in cm Rep Rep Replication number integer Replication number NH4 NH4 ammonium float dimensionless real M Missing Value NO3 NO3 nitrate float dimensionless real M Missing Value PO4 PO4 phosphate ion float dimensionless real M Missing Value SO4 SO4 sulfate ion float dimensionless real M Missing Value K K Potassium float dimensionless real M Missing Value NA NA sodium float dimensionless real M Missing Value CA CA Calcium float dimensionless real M Missing Value MG MG Magnesium float dimensionless real M Missing Value MN MN Manganese float dimensionless real M Missing Value ZN ZN Zinc float dimensionless real M Missing Value FE FE Iron float dimensionless real M Missing Value AL AL Aluminum float dimensionless real M Missing Value SI SI Silicon float dimensionless real M Missing Value CL CL Chlorine float dimensionless real M Missing Value CO3 CO3 carbonate ion float dimensionless real M Missing Value CON CON concentration of nitrogen float dimensionless real M Missing Value PH PH Ph float dimensionless real M Missing Value B B Boron float dimensionless real M Missing Value CU CU Copper float dimensionless real M Missing Value CR CR Chromium float dimensionless real M Missing Value MO MO Molybdenum float dimensionless real M Missing Value BA BA BA float dimensionless real M Missing Value