Variable

Frequency/Class

Extent/Location

Method

Typical or Mean Value(s)

Site history

Single

All areas within 2.5 km radius of flux tower

Agency records, aerial photos

Various ages of forests; primarily selection harvests

Species

Composition

Single

54 paired plots of 150 m² and 10 m²

Species ID;

Diameter tape

29 tree species

Canopy height

Single

54 paired plots of 150 m² and 10 m²

Tape and clinometer

27 m

Aboveground biomass

Single

54 paired plots of 150 m² and 10 m²

Allometric modeling

Total = 22.1 kg/m²

Root biomass

Single

Within 34 plots of

1 m²

Soil pits

0-20cm     =468.26 g/m²

20-40cm   =121.92 g/m²

40-60cm   =137.24 g/m²

60-80cm   = 11.37 g/m²

80-100cm = 22.65 g/m²

Soil bulk density

Single

Within 34 plots of

1 m²

Gravimetric

1.22 g/cm³

Soil texture

Single

Within 34 plots of

1 m²

Hydrometer

Sand  = 31.58%

Silt    = 39.63%

Clay  = 28.79%

Root depth

Single

Within 34 plots of 1 m²

Soil pits

44 cm

Maximum leaf area index

Annual

Above litter traps in 34 plots of 150 m²

LiCor LI-2000

5.58 (for a single date)

4.62 (for a yearly average)

Max IPAR

Annual; continuous

Tower

LiCor quantum meter

Measured by tower meteorological instruments

Seasonal litterfall

Annual; collected biweekly in fall

Centers of 16 plots of 150 m²

Circular mesh traps with

0.5 m²

catchment

’99 =207.93 g/m² (leaf)

’99 = 14.12 g/m² (seeds)

’99 = 18.56 g/m² (woody)

’00 = 208.61 g/m² (leaf)

’00 = 25.22 g/m²  (seeds)

’00 = 25.39 g/m² (woody)

’01 = 189.84 g/m² (leaf)

’01 = 7.14 g/m²  (seeds)

’01 = 41.04 g/m² (woody)

’02 = 212.72 g/m² (leaf)

’02 = 24.17 g/m²  (seeds)

’02 = 36.04 g/m² (woody)

Litter decomposition rate

Annual; collected monthly

144 bags, at 3 topographic locations, within

150 m² plots

Litter bags

k = 0.5468

(0.49, 0.6036 – 95%)

Leaf total N and C content

Repeated; collected seasonally

45 samples of 20 leaves each within 150 m² plots and Immediate Source Area

CHN Analyzer

N =  2.22%

C = 47.31%

Specific leaf area and mass

Repeated; collected seasonally

45 samples of 20 leaves each within Immediate Source Area

Gravimetric

Leaf area scanner

Species        SLA     SLM

A. Beech    226.67   0.006

Sassafras    168.03   0.009

White Oak  168.70   0.007

Red Oak      260.20  0.005

S. Maple      205.88  0.006

T. Poplar     189.04  0.006

Soil temperature (spatial)

Repeated; bi-weekly

17 plots within 150 m² plots

Oakton thermistors

Various

Soil temperature

(continuous)

Repeated;

continuous

8 chambers within

Immediate Source Area

Campbell

thermocouples

Various

Soil moisture (spatial)

Repeated; bi-weekly

17 plots within 150 m² plots

Gravimetric

Various

Soil moisture (temporal)

Repeated; continuous

2 plots within Immediate Source Area

Campbell soil moisture rods

Various

Soil CO₂ flux (spatial)

Repeated; biweekly

10 points in each of 5 plots of 150 m²

LiCor LI-6400 system

Various

Soil CO₂ flux (temporal)

Repeated; continuous

8 chambers within Immediate Source Area

Automated system

Various

Litter C, N, & elements

Single

34 plots of 1 m²

CHN Analyzer

ICP Analyzer

C   = 47.26%

N   =  0.88 %

P    = 0.3438 mg/g

K    = 0.989 mg/g

Ca  = 7.792 mg/g

Mg = 0.7861 mg/g

Mn = 1.4210 mg/g

Soil C, N, & elements

Single

34 soil pits in 1 m² plots: 6 soil layers

CHNS/O Analyzer

ICP Analzyer

C   = 0.88%

N   = 0.09%

Available

P    = 0.017 mg/g

K    = 0.108 mg/g

Ca  = 1.430 mg/g

Mg = 0.151 mg/g

Mn = 0.232 mg/g

LAI profile

Repeated; seasonally

150 m² plots

Li-Cor LI-2000

Annual = 4.62

Leaf water potential

Repeated; seasonally

45 sets of 6 leaves each within Immediate Source Area

PMS Pressure Bomb

’98 = -1.96 MPa

’99 = -1.76 MPa

’00 = -1.57 MPa

’01 = -1.66 MPa

‘02 = -1.59 MPa

’03 = -1.62 MPa

Leaf Photosynthesis

Repeated; bi-weekly during growing season

45 sets of 6 leaves within Immediate Site Area

LiCor LI-6400 system

Various

Foliar, bole respiration

Repeated; seasonally

Immediate Source Area

LiCor LI-6400 system

Various

Standing dead

Single

Trees in 46 paired plots of 150 m² and 10 m²

Observation

Biomass = 2.55 kg/m²

Coarse woody debris

Single

Trees in 36 plots of 150 m²

Observation

Total = 438.33 g/m²

Duff total C and N content

Single

34 plots of  1 m²

CHNS/O Analyzer

C = 25.83%

C = 30.89 g/m²

N =0.87 %

P    = 0.735 mg/g

K    = 1.916 mg/g

Ca  = 20.018 mg/g

Mg = 1.692 mg/g

Mn = 1.480 mg/g

% rock in soil layers

Single

34 plots within

1 m² plots

Sieves

Total (by mass) = 21.08%

Depth to Bedrock

Single

34 plots within

1 m² plots

Soil pits

Mean = 2.2 m

Minimum = 0.6 m

Tree Status (Live/Dead)

Annual

Trees in 54 paired plots of 150 m²

10 m²

Observation

Low mortality

Herbaceous

Vegetation

(% cover)

Repeated; seasonally

42 1 m² plots within 150 m² plot

Observation

36.60 + 12.10 %/m²

Herbaceous Vegetation total C, N & nutrients

Single

42 1 m² plots within 150 m² plot

CHN Analyzer

ICP Analzyer

C   = 41.617 %

N   = 2.005 %

P    = 1.324 mg/g

K    = 25.445 mg/g

Ca  = 11.693 mg/g

Mg = 2.497 mg/g

Mn = 0.345 mg/g

Tree / Leaf

Phenology

Repeated; bi-weekly at margins

113 individual trees in 24 plots of 150 m²

Observation

Various

Herbivory

Estimates

Repeated; bi-weekly during growing season

113 individual trees in 24 plots of 150 m²

Observation

Annual = 8.5%

Canopy Reflectance

Repeated; seasonally

12 trees within Immediate Source Area

LiCor LI-1800

Various

Leaf Reflectance

Repeated; seasonally

30 trees within Immediate Source Area

LiCor LI-1800

Various

Stand/tract boundaries and mgt. history

1:24,000

All sampling locations within 2.25 km of tower

Not Applicable

Not Applicable

Hypsography/ TIN

1:24,000

Complete coverage of all areas within 2.25 km of tower

Not Applicable

Not Applicable

Plot data

1:24,000

All sampling locations, including tower, litter traps, 150 m² plots, LAI transect points

Not Applicable

Not Applicable

Sampling grid

Single

Tower and Immediate source area; scalable

Not Applicable

Not Applicable

Source area polygons

Repeated

Sources for eddy fluxes

Not Applicable

Not Applicable

NRCS Soil type

1:15,840

Tower and immediate source area

Not Applicable

Not Applicable

Tree maps

1:500

Immediate source area

Observation

Various