MBSS Site Summary for: AL-A-281-104-96


Located on DRY RUN in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 4/11/1996 and again in the summer on 7/10/1996.

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 N R
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 336 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 0.6 %
Forested Land Use 99.1 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 6.88
Alkalinity
(acid neutralizing capacity) 		119.8 µeq/L
Dissolved organic carbon (DOC) 2.2 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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
Long-Tailed 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
Perlodidae Perlodid Stonefly 32
Ameletus Combmouthed Minnow Mayfly 22
Stegopterna Black Fly 15
Ephemerella Sulphur Mayfly 10
Rhyacophila Free-Living Caddisfly 7
Amphinemura Spring Stonefly 4
Ostrocerca Stonefly 4
Chloroperlidae Green Stonefly 3
Diamesa Bloodworm 3
Leuctra  Rolled-Winged Stonefly 3
Prosimulium Black Fly 2
Dolophilodes Medium Evening Sedge Caddisfly 2
Neophylax Caddisfly 1
Caecidotea Isopod 1
Epeorus Mayfly 1
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.