LOCATION DESCRIPTION
Tension-free lysimeters are installed in the Oa, Bh and Bs horizons at
3 sites located adjacent to watershed 6 at elevations of 750m
(spruce-fir-white beech zone; SFB), 730m (high elevation hardwood
zone; HH) and 600m (low elevation hardwood zone; LH). Three replicate
lysimeters were installed beneath the Oa and Bh horizons and within
the Bs horizon at the HH and LH sites, and two replicate lysimeters
were installed in each horizon at the SFB site.
SAMPLING DESIGN
The lysimeters were constructed from either polyethylene funnels
filled with acid-washed silica sand that drain into 1-L polyethylene
containers or rectangular polyethylene containers filled with
acid-washed Teflon beads that drain into 2-L polyethylene bottles. At
each site, lysimeters were carefully installed in the wall of
excavated soil pits, immediately below the Oa and Bh horizons and
within the lower Bs horizon. Soil pits were backfilled to prevent
accumulation of water and to eliminate freezing during winter months.
Soil solution samples are collected approximately monthly in
acid-washed polyethylene bottles and refrigerated at 4 degrees C.
NOTES ON DATA
Between 1984 and 1986 and 1998-present, data are the arithmetic means
for samples collected from individual lysimeters. From 1986 through
1998, data are for bulked soil solutions collected from replicate
lysimeters. Current detection limits for the Driscoll laboratory: Na
(0.015 umol/L), K (0.12 umol/L), Ca (0.030 umol/L), Mg (0.0032
umol/L), Alt (0.0026 umol/L), Alm (1.3 umol/L), Alo (1.3 umol/L), NH4
(0.55 umol/L), H4SiO2 (3 umol/L), Cl (0.55 umol/L), NO3 (0.85 umol/L),
SO4 (0.53 umol/L), F (0.097 umol/L), DIC (20 umol/L), DOC (20 umol/L),
TN (0.81 umol/L). It is suggested to dataset users to use a value of
one half the detection limit when a value for a solute is less than
the detection limit. The data is physically located at the Department
of Civil and Environmental Engineering, Syracuse University, Syracuse,
NY.
REFERENCES
Dahlgren, R.A., and Driscoll, C.T. 1994. The effects of whole-tree
clear-cutting on soil processes at the Hubbard Brook Experimental
Forest, New Hampshire, USA. Plant Soil 158:239-262.
Dittman, J.A. Dynamics of Nitrogen and Dissolved Organic Carbon in a
Forested Watershed at the Hubbard Brook Experimental Forest. Master of
Science, Syracuse University.
Dittman, J.A., Driscoll, C.T., Groffman, P.M., and Fahey, T.J. 2007.
Dynamics of nitrogen and dissolved organic carbon at the Hubbard Brook
Experimental Forest. Ecology 88(5):1153-1166.
Driscoll, C.T., Fuller, R.D., and Simone, D.M. 1988. Longitudinal
variations in trace metal concentrations in a northern hardwood
forested ecosystem. J. Environ. Qual. 17(1):101-107.
Fuss, C.B. 2009. Biogeochemical dynamics of oxidized and reduced iron
at the Hubbard Brook Experimental Forest. Masters of Science, Syracuse
University.
Fuss, C.B., Driscoll, C.T., Johnson, C.E., Petras, R.J., and Fahey,
T.J. 2011. Dynamics of Oxidized and Reduced Iron in a Northern
Hardwood Forest. Biogeochemistry 104(1-3 (July)):103-119.
Johnson, C.E., Driscoll, C.T., Siccama, T.G., and Likens, G.E. 2000.
Element fluxes and landscape position in a northern hardwood forest
watershed ecosystem. Ecosystems 3:159-184.
Palmer, S.M. Spatial and temporal patterns in the biogeochemistry of
aluminum at the Hubbard Brook Experimental Forest, New Hampshire.
Dissertation, Syracuse University.
Palmer, S.M., Driscoll, C.T., and Johnson, C.E. 2004. Long-term trends
in soil solution and stream water chemistry at the Hubbard Brook
Experimental Forest: relationship with landscape position.
Biogeochemistry 68(1):51-70.
