Soil Chemistry for the Hubbard Brook Valley Plots, 1997 - 1998 Survey Data
TITLE
Soil Chemistry for the Hubbard Brook Valley Plots, 1997 - 1998 Survey Data
PRINCIPAL INVESTIGATOR(s)
John J. Battles
University of California, Berkeley
Environmental Science, Policy, and Management
137 Mulford Hall
Berkeley, CA 94720-3114
USA
Tim Fahey
Department of Natural Resources, Cornell University
104A Bruckner Hall
Ithaca, NY 14853
USA
OTHERS INVOLVED
Thomas G. Siccama
Yale School of Forestry and Environmental Studies
Paul Schwarz
Suzanne Wapner
ABSTRACT:
The valley-wide plots are a grid of 431 sites along fifteen N–S transects established at 500-m intervals spanning the entire Hubbard Brook Valley. Multiple above- and below- ground attributes were measured between 1995 and 1998. This dataset includes soil chemistry data; tree inventory, additional soil data and other measurements are presented in separate datasets.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
forests, HBEF Valleywide Plots, HBR, Hubbard Brook LTER, inventory, schwarz, soil, soil chemistry, watersheds.
KEYWORD SET: LTER Core Research Areas
primary production.
BEGIN DATE
1997-07-07
END DATE
1998-08-17
LOCATION
The 260 plots in this dataset are a subset of 431 plots that are located across the entire Hubbard Brook Valley. Fifteen N–S transects were established at 500-m intervals to span the entire Hubbard Brook Valley. Along the transects, a regular array of 431 500-m2 circular plots was established at distance intervals of either 25 m, 100 m, or 200 m. The subset includes all plots from every other transect. UTM coordinates of all plots are included in this dataset. A map of the plot locations can be found in: Schwarz et al, 2003.
West bounding coordinate: -71.80620
East bounding coordinate: -71.70220
North bounding coordinate: 43.9590
South bounding coordinate: 43.9140
DATA DESCRIPTION
This dataset contains soil pH, moisture, texture, and cation exchange for soil samples collected from 260 plots of the total 431 valley-wide plots that Paul Schwarz and others established between 1995 and 1998. The dataset also contains soil chemistry (element analysis) for 200 plots in the subset. Data collected on these plots led to two publications and a doctoral dissertation. Other soils data (soil depth and mineral soil depth) and tree data (species, condition, and for some tree ring increment measures and tree height) were also collected and are presented in separate datasets.
SAMPLING DESIGN
Paul Schwarz and others collected this data on a subset of the 431 plots that are located across the entire Hubbard Brook Valley. The following methods for establishment of the 431 plots, the selection process for the subset of 260 plots, and the soil sample collection are excerpted from Schwarz et al 2003, page 1864 (see REFERENCES):
"Fifteen N–S transects were established at 500-m intervals to span the entire Hubbard Brook Valley. Along the transects, a regular array of 431 500-m2 circular plots was established at distance intervals of either 25 m, 100 m, or 200 m. The sampling layout and spacing of the plots was designed to facilitate the analysis of spatial patterns in the forest vegetation by utilizing a wide range of distance intervals between plots (Fortin et al. 1989)."
UTM coordinates of all plots are included in this dataset. Specific coring locations (bearing and distance from plot center) within each plot are presented in a separate dataset. A map of the plot locations can be viewed here: http://hubbardbrook.org/watersheds/maps/images/schwarz_plot_map.jpg
SAMPLE COLLECTION AND ANALYSIS
Soil samples were taken from a subset of 260 plots that consisted of all the plots from every other transect. Twelve soil cores (2 cm diameter) were collected at randomly chosen locations within each plot. The forest floor material was separated from the mineral soil, and 15cm of mineral soil was retained from each core. In the laboratory, the samples from each plot were air dried, sieved to separate the gravel fraction (2.0 mm diameter), and then composited. The single composite sample from each plot was used for all subsequent analyses. Mineral soil pH was measured using a 2:1 water:soil suspension. Exchangeable cation concentrations were measured using ammonium chloride and mechanical vacuum extraction (Huntington et al. 1990). Previous studies indicated that soils in the HBEF have low clay contents (S. W. Bailey, personal communication). Therefore, we expected most of the variation in particle size in the sand and silt fractions. We measured particle size distribution by adapting the methods of Gee and Bauder (1982). We first dispersed a 50-g subsample of mineral soil with an aqueous solution of Calgon detergent, then wet sieved the suspension through a 0.053-mm mesh sieve to remove silt and clay particles, and finally dry sieved to separate sand particles into five size classes.
REFERENCES
  • Fortin, M.-J., Drapeau, P., and Legendre, P. 1989. Spatial autocorrelation and sampling design in plant ecology. Vegetation 83:209–222.
  • Gee, G.W., and Bauder, J.W. Particle-size analysis. In [Eds.], Methods of soil analysis. Part I: physical and mineralogical methods, 383–411American Society of Agronomy– Soil Science Society of America.
  • Huntington, T.G., Johnson, A.H., and Schwartzman, T.N. 1990. Mechanical vacuum extraction vs. batch equilibrium for estimation of exchangeable cations. Soil Science Society of America Journal 54:381–385.
  • Schwarz, P.A. 2001. Spatial patterns of abundance of northern hardwood-conifer tree species in a forested valley in the White Mountains, New Hampshire, USA. PhD Disseration, Cornell University.
  • Schwarz, P.A., Fahey, T.J., Martin, C.W., Siccama, T.G., and Bailey, A.S. 2001. Structure and composition of three northern hardwood-conifer forests with differing disturbance histories. Forest Ecology and Management 144:201-212.
  • Schwarz, P.A., Fahey, T.J., and McCulloch, C.E. 2003. Factors controlling spatial variation of tree species abundance in a forested landscape. Ecology 84(7):1862-1878.
DATA ACCESS GUIDELINES
Data Use Policy



The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, government or other not-for-profit professional purposes.

2) Redistribution. The data and metadata are provided for use by the Data User. The Data User will not redistribute the original Data Set or metadata to others without the explicit permission of the Principal Investigator.

3) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly attribute 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, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier.

Citation example: Holmes, R.T. 2012. Bird Abundances at Hubbard Brook (1969-2010) and on three replicate plots (1986-2000) in the White Mountain National Forest. Durham, NH. Hubbard Brook Data Archive [Database]. http://hubbardbrook.org/data/dataset.php?id=81 (23 July 2012)

4) Acknowledgment: The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed to its content. Acknowledgments should identify the supporting party, the party that received the support, and any identifying information such as grant numbers.

Acknowledgment example: Data on [topic] were provided by [name of PI] on [date]. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station, Newtown Square, PA. Significant funding for collection of these data was provided by [agency]-[grant number], [agency]-[grant number], etc.

5) Consultation and questions. Data users are strongly encouraged to consult with the Principal Investigator(s) who collected these data for further information. Also, when appropriate, Data Users should consider including the Principal Investigator as a collaborator and/or co-author in the use of these data.

6) Notification. The Data User will notify the Principal Investigator of any publication or derivative work based on the Data Set. The Data User will also provide the Principal Investigator and/or the administrator of the Hubbard Brook Ecosystem Study with a pdf or two reprints of any publication(s) resulting from use of the Data Set.

7) Disclaimer. While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

8) Terms of Agreement. By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.



CONTACT PERSON

Information Manager, Hubbard Brook LTER
234 Mirror Lake Road
North Woodstock, NH 03262
USA

Phone: (603) 726-8902
Email: hbr-im@lternet.edu

Data file: valley_soil_chem
Description: Soil Chemistry for the Hubbard Brook Valley Plots
ColumnVariableDescriptionUnitsCoded?Missing value label
1PLOTPlot ID numbernoneynone
2UTM_EASTINGUTM Easting of plot locationmeternnone
3UTM_NORTHINGUTM Northing of plot locationmeternnone
4PHpHpHnnone
5MOISTURE_%Soil moisture contentpercentnnone
6OM_%Soil organic matter fractionpercentnnone
7CdCadmium concentration in soilmilliGramPerKilogramn
-9999.999
8CuCopper concentration in soilmilliGramPerKilogramn
-9999.999
9NiNickel concentration in soilmilliGramPerKilogramn
-9999.999
10CrChromium concentration in soilmilliGramPerKilogramn
-9999.999
11CoCobalt concentration in soilmilliGramPerKilogramn
-9999.999
12ZnZinc concentration in soilmilliGramPerKilogramn
-9999.999
13MnManganese concentration in soilmilliGramPerKilogramn
-9999.999
14Ca_%Calcium fraction in soilpercentn
-9999.999
15CaCalcium concentration in soilmilliGramPerKilogramn
-9999
16Mg_%Magnesium fraction in soilpercentn
-9999.999
17MgMagnesium concentration in soilmilliGramPerKilogramn
-9999
18Al_%Aluminum fraction in soilpercentn
-9999.999
19AlAluminum concentration in soilmilliGramPerKilogramn
-9999
20Fe_%Iron fraction in soilpercentn
-9999.999
21FeIron concentration in soilmilliGramPerKilogramn
-9999
22PPhosphorus concentration in soilmilliGramPerKilogramn
-9999.999
23SSulfur concentration in soilmilliGramPerKilogramn
-9999.999
24BBoron concentration in soilmilliGramPerKilogramn
-9999.999
25Ti_%Titanium fraction in soilpercentn
-9999.999
26TiTitanium concentration in soilmilliGramPerKilogramn
-9999
27K_%Potassium fraction in soilpercentn
-9999.999
28KPotassium concentration in soilmilliGramPerKilogramn
-9999
29Na_%Sodium fraction in soilpercentn
-9999.999
30NaSodium concentration in soilmilliGramPerKilogramn
-9999
31EXCH_AlExchangeable aluminum in soilpercentn
-9.9999999999
32EXCH_AsExchangeable arsenic in soilpercentn
-9.9999999999
33EXCH_BExchangeable boron in soilpercentn
-9.9999999999
34EXCH_CaExchangeable calcium in soilpercentn
-9.9999999999
35EXCH_CdExchangeable cadmium in soilpercentn
-9.9999999999
36EXCH_CoExchangeable cobolt in soilpercentn
-9.9999999999
37EXCH_CrExchangeable chromium in soilpercentn
-9.9999999999
38EXCH_CuExchangeable copper in soilpercentn
-9.9999999999
39EXCH_FeExchangeable iron in soilpercentn
-9.9999999999
40EXCH_KExchangeable potassium in soilpercentn
-9.9999999999
41EXCH_MgExchangeable magnesium in soilpercentn
-9.9999999999
42EXCH_MnExchangeable manganese in soilpercentn
-9.9999999999
43EXCH_MoExchangeable molybenum in soilpercentn
-9.9999999999
44EXCH_NiExchangeable nickel in soilpercentn
-9.9999999999
45EXCH_PExchangeable phosphorus in soilpercentn
-9.9999999999
46EXCH_PbExchangeable lead in soilpercentn
-9.9999999999
47EXCH_SeExchangeable selenium in soilpercentn
-9.9999999999
48EXCH_SrExchangeable strontium in soilpercentn
-9.9999999999
49EXCH_VExchangeable vanadium in soilpercentn
-9.9999999999
50EXCH_ZnExchangeable zinc in soilpercentn
-9.9999999999
51EXCH_BCSum of base cations in soilmilliEquivalentPerGramn
-9.9999999999
52GRAVELSoil gravel fractionpercentnnone
53SANDSILTCLAYSoil Sand Silt Clay fractionpercentnnone
54VERYCOARSESANDSoil Very Coarse Sand fractionpercentnnone
55COARSESANDSoil Coarse Sand fractionpercentnnone
56MEDIUMSANDSoil Medium Sand fractionpercentnnone
57FINESANDSoil Fine Sand fractionpercentnnone
58VERYFINESANDSoil Very Find Sand fractionpercentnnone
59SILTCLAYSoil Silt Clay fractionpercentnnone
60DateSample datenoneynone

CODES

Variable: PLOT
Description:
Plot where samples was collected
Variable: Date
Description:
Years during which sample was collected

MISSING VALUE CODES
Variable
Missing Value Code
Code Explanation
Cd
-9999.999
Not measured
Cu
-9999.999
Not measured
Ni
-9999.999
Not measured
Cr
-9999.999
Not measured
Co
-9999.999
Not measured
Zn
-9999.999
Not measured
Mn
-9999.999
Not measured
Ca_%
-9999.999
Not measured
Ca
-9999
Not measured
Mg_%
-9999.999
Not measured
Mg
-9999
Not measured
Al_%
-9999.999
Not measured
Al
-9999
Not measured
Fe_%
-9999.999
Not measured
Fe
-9999
Not measured
P
-9999.999
Not measured
S
-9999.999
Not measured
B
-9999.999
Not measured
Ti_%
-9999.999
Not measured
Ti
-9999
Not measured
K_%
-9999.999
Not measured
K
-9999
Not measured
Na_%
-9999.999
Not measured
Na
-9999
Not measured
EXCH_Al
-9.9999999999
Not measured
EXCH_As
-9.9999999999
Not measured
EXCH_B
-9.9999999999
Not measured
EXCH_Ca
-9.9999999999
Not measured
EXCH_Cd
-9.9999999999
Not measured
EXCH_Co
-9.9999999999
Not measured
EXCH_Cr
-9.9999999999
Not measured
EXCH_Cu
-9.9999999999
Not measured
EXCH_Fe
-9.9999999999
Not measured
EXCH_K
-9.9999999999
Not measured
EXCH_Mg
-9.9999999999
Not measured
EXCH_Mn
-9.9999999999
Not measured
EXCH_Mo
-9.9999999999
Not measured
EXCH_Ni
-9.9999999999
Not measured
EXCH_P
-9.9999999999
Not measured
EXCH_Pb
-9.9999999999
Not measured
EXCH_Se
-9.9999999999
Not measured
EXCH_Sr
-9.9999999999
Not measured
EXCH_V
-9.9999999999
Not measured
EXCH_Zn
-9.9999999999
Not measured
EXCH_BC
-9.9999999999
Not measured