28. Millbrook Marsh

General Information

Reference Number: 28
State: Pennsylvania
County: Centre
Municipality: College
USGS Quad: State College
Watershed: Spring Creek
Hydrogeomorphic Class: Mainstem floodplain
Disturbance Class: Severe
Dominant Vegetation Class: *PSS/PEM
Wetland Area: 0.7 ha (1.7 ac)
Year(s) Sampled: 1994

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Vegetation

Herbaceous
Percent Cover: 80.3% (range 45-95%)
Dominant Species
Common Name Scientific Name
Grass
Reed canarygrass Phalaris arundinacea
Brome Bromus sp
Creeping buttercup Ranunculus repens
Rough avens Geum laciniatum
Woody
Percent cover: 35.6% (range 0-85%)
Dominant Species
Silky dogwood Cornus amomum
Black walnut Juglans nigra
Box elder Acer negundo
Tatarian honeysuckle Lonicera tatarica
Wild black currant Ribes americanum
Weighted Indicator Status (dominant species)
Herbaceous: 2.48
Woody: 2.67
Weighted Indicator Status (all species)
Herbaceous: 2.81
Woody: 2.71
Species Richness
Total: 69
Herbaceous: 63
Woody: 6

Soils

Matrix Chroma (mean): 2.0
Organic Matter (mean %): 5.2
Bulk Density (g/cm2): 0.84
Soil Series: Melvin silt loam
Texture (mean %)
Sand: 29.3
Silt: 38.5
Clay: 32.2
Sedimentation Rate
Mineral loading (g/cm2): 0.19
Equivalent depth (cm): 0.10
Organic loading (g/cm2): 0.22

Hydrology

Water Level
Median (cm): -112.0
Range (cm): -130.0-(-42.0)
Water Quality
pH (mean): 7.2
Conductivity (mean): 660.0