| Willow Creek - Core Measurements Summary Table |
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| Measurement |
Mean Value |
Units |
Description |
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| Stand Characteristics |
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| Core Measurements: |
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| Species Composition |
44.8/41.3/13.9 |
% of basal area |
A. sacharum/T. americana/F. pensylvanica,
measurements described in Martin et al., 2005 |
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| Aboveground biomass |
74.9 |
Mg/ha |
described in Curtis et al., AgForMet 2002,
113:3-19. |
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| Root biomass |
614.73 |
g/m3 soil |
measured to depth of 1 meter, does not include
stump/rootball mass; described in Martin et al., 2005, JGR in press |
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| Canopy Height |
24.2 |
meters |
se = 0.88m, measurements described in Martin et
al.,2005, JGR in press |
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| Maximum LAI |
5.36 |
m2/m2 |
litter traps, measurements described in Martin
et al.,2005, JGR in press |
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| Seasonal Change in LAI |
100 |
% |
above/below canopy PAR, site observation - 100%
deciduous |
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| Understory LAI |
0.2 |
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unpublished clipped plots |
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| MAX IPAR: Annual |
micromet tables online |
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http://cheas.psu.edu |
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| Seasonal Litterfall |
280.31 |
g/m2/year |
measured over 4 years, litterfall, measurements
described in Martin et al.,2005, JGR in press |
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| Site History |
see //cheas.psu.edu |
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| Atmospheric N Deposition |
not measured |
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| Desired Measurements: |
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| LAI Profile |
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measured as described in Radtke and Bolstad,
CJRF, 2001, 34:410-418 |
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| height (m) |
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| 0.5 |
0.076392224 |
LAI (m2/m2) from previous to this interval |
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| 1.5 |
0.108333452 |
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| 2.5 |
0.079230363 |
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| 3.5 |
0.077897325 |
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| 4.5 |
0.121353405 |
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| 5.5 |
0.123866816 |
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| 6.5 |
0.1550208 |
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| 7.5 |
0.192882106 |
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| 8.5 |
0.233321943 |
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| 9.5 |
0.24563316 |
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| 10.5 |
0.277448551 |
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| 11.5 |
0.281618917 |
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| 12.5 |
0.376840577 |
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| 13.5 |
0.349688576 |
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| 14.5 |
0.420038383 |
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| 15.5 |
0.366353019 |
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| 16.5 |
0.406738154 |
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| 17.5 |
0.314620515 |
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| 18.5 |
0.248823768 |
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| 19.5 |
0.167054211 |
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| 20.5 |
0.133108692 |
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| 21.5 |
0.065291954 |
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| 22.5 |
0.020523203 |
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| 23.5 |
0.004087613 |
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| Ground and Canopy Albedo |
micromet data online |
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see http://cheas.psu.edu |
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| Satellite image - annual |
one date available |
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| Aerodynameic roughness
length |
not measured |
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| Stand Physiology |
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| Core Measurements: |
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| Annual aboveground
growth increment |
528.91 |
g/m2/year |
measured over 5 years, measurements described
in Martin et al.,2005, JGR in press |
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| Bole temperature |
in micromet tables |
C, hourly |
see http://cheas.psu.edu |
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| Leaf total N and C |
N=2.15/2.79; C=47.2/48.5 |
% |
Acer sacharum/F. pensylvanicum, based on >
200 leaves each sampled in the canopy |
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| Specific leaf area |
177.7/236.1/118.3; 125.2/190.3/93.1 |
cm2/gm |
mean/max/min for Acer sacharum and F.
pensylvanicum, respectively, > 200 leaves throughout canopy |
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| Bole and sapwood N and C |
not measured |
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| Desired Measurements: |
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| Stomatal conductance |
paper in review, Tang et al. |
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based on 3 years measurements, 2001-2004 |
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| minimum spring leaf
water potential |
paper in review, Tang et al. |
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based on 3 years measurements, 2001-2004 |
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| sap flow |
paper in review, Kreller et al. |
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based on 3 years measurements, 2001-2004 |
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| light response curves
(Ic, Amax) |
paper in review, Kreller et al. |
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based on 2 years measurements, 2002-2004 |
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| A/Ci Curves |
paper in review |
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based on 2 years measurements, 2002-2004 |
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| Foliar/bole respiration |
0.565/2.332 |
Mg C/ha/year |
1999-2002 as per Bolstad et al., 2004, Tree
Phys. 24:493-504. Bole respiration 24-hour, year round, leaf nightime only,
growing season |
| Leaf and woody tissue
NSCH |
not measured |
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| Tissue C12/C12 |
not measured |
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| Atmospheric C13/C12 |
not measured |
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| Soil Characteristics |
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| Core Measurements: |
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| Soil temperature profile |
in micromet tables |
C, hourly |
see http://cheas.psu.edu |
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| soil moisture |
in micromet tables |
C, hourly |
see http://cheas.psu.edu |
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| soil bulk density |
0.972 |
g/cc |
56 soil
cores, 10.16 cm diameter, described in Martin et al.,2005, JGR in press |
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| soil texture |
59.3/34.0/6.9 |
%sand/silt/clay |
56 soil
cores, 10.16 cm diameter, described in Martin et al.,2005, JGR in press |
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| root depth |
> 1 meter |
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56 soil
cores, 10.16 cm diameter, described in Martin et al.,2005, JGR in press |
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| fine root/coarse root,
0-30cm |
148.4/107.4 |
g/m3 |
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| fine root/coarse root,
30-60cm |
54.8/83.9 |
g/m3 |
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| fine root/coarse root,
60-100cm |
44.2/175.9 |
g/m3 |
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| soil co2 flux |
8.8725 |
Mg C/ha/year |
1999-2002 average as per Bolstad et al., 2004,
Tree Phys. 24:493-504. |
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| litter decomposition |
not measured |
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| Desired Measurements: |
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| Litter C, N, and lignin |
35.5/1.14/- |
% |
56 soil
cores, 10.16 cm diameter, described in Martin et al.,2005, JGR in press |
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| Soil C and N |
2.15/0.16 |
% |
56 soil
cores, 10.16 cm diameter, described in Martin et al.,2005, JGR in press |
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| N mineralization rate |
not measured |
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| soil thermal and
hydraylic cond. |
not measured |
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| CEC |
not measured |
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