MBSS Site Summary for: CR-P-403-112-96


Located on GRAVE RUN UT1 in the Prettyboy Reservoir watershed, 8-digit code: 02130806.
This stream was visited in the spring on 4/15/1996 and again in the summer on 6/10/1996.

Index of Biotic Integrity (IBI) Results:

An Index of Biotic Integrity (IBI) is a scientific tool used to identify and classify stream health. An IBI associates anthropogenic influences on a stream or with biological condition in the stream, and is formulated using data developed from biosurveys.
Details on the development and application of MBSS IBIs are in this document.
Fish IBI Good - 4.3 / 5.0
Benthic IBI Fair - 3.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 198 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 0 %
Agricultural Land Use 82.8 %
Forested Land Use 17.7 %


Stream showing woody debris, logs, and rocky substrate.
An example of woody debris in a stream.

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = meters 		7/20 (Marginal)
Riffle Quality 13/20 (Suboptimal)
Shading 70 %
Embeddedness 10 %


Stream Water Quality:
Water temperature 13.9 ° C
Dissolved oxygen (DO) 10.6 mg/L
pH (lab) 6.96
Conductivity 98 µmho/cm
Alkalinity
(acid neutralizing capacity) 		243.1 µeq/L
Dissolved organic carbon (DOC) 0.6 mg/L

Biological Stream Condition:

Surveys of the organisms living within a stream can give indications of stream health. Species richness, or the number of different species present, as well as indicator species (species whose presence, absence or abundance can serve as a measure of environmental conditions) are informative for stream health. 		Close-up of a mayfly indicator species.

Fish Survey Results:
The following 1 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 18
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Dusky Salamander
Northern Red Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 49
Paraleptophlebia Blue Quill Mayfly 37
Diphetor Mayfly 10
Isoperla Stripetail Stonefly 4
Conchapelopia Non-Biting Midges 2
Parametriocnemus Non-Biting Midges 2
Optioservus Riffle Beetle 2
Tallaperla Roach-Like Stonefly 2
Kick net sampling for macroinvertebrates.
Sampling with a kick net.

Information disclaimer: The information and data on this page is for guidance and general planning purposes only. It should not be used to make decisions on specific matters.