MBSS Site Summary for: AL-A-148-201-96


Located on SEVEN SPRINGS RUN in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 4/4/1996 and again in the summer on 6/19/1996.

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 Poor - 2.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,016 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 15.1 %
Forested Land Use 84.5 %


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) 7.85
Alkalinity
(acid neutralizing capacity) 		1163 µeq/L
Dissolved organic carbon (DOC) 2.7 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:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 21
Baetis Blue-Winged Olive Mayfly 16
Gammarus Amphipod 15
Parametriocnemus Non-Biting Midges 11
Tanytarsus Non-Biting Midges 10
Tubificidae Aquatic Worm 10
Prosimulium Black Fly 3
Optioservus Riffle Beetle 3
Ephemerella Sulphur Mayfly 1
Perlodidae Perlodid Stonefly 1
Polypedilum Non-Biting Midges 1
Corynoneura Non-Biting Midges 1
Eukiefferiella Non-Biting Midges 1
Diamesa Bloodworm 1
Ameletus Combmouthed Minnow Mayfly 1
Chimarra Fingernet Caddisfly 1
Dicranota Hairy-Eyed Cranefly 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.