MBSS Site Summary for: AL-A-706-228-96


Located on COLLIER RUN in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 4/15/1996 and again in the summer on 8/6/1996.

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 Poor - 1.7 / 5.0
Benthic IBI Fair - 3.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 962 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 2.1 %
Forested Land Use 97.8 %


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

Physical Stream Habitat
Instream Habitat 11/20 (Suboptimal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = meters 		12/20 (Suboptimal)
Riffle Quality 11/20 (Suboptimal)
Shading 80 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 20.4 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 6.25
Conductivity 32 µmho/cm
Alkalinity
(acid neutralizing capacity) 		30.6 µeq/L
Dissolved organic carbon (DOC) 2.4 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 89
Creek Chub 40
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander
Northern Two-Lined 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
Leuctra  Rolled-Winged Stonefly 21
Prosimulium Black Fly 19
Polypedilum Non-Biting Midges 12
Stegopterna Black Fly 8
Ameletus Combmouthed Minnow Mayfly 7
Isoperla Stripetail Stonefly 6
Stenacron Mayfly 3
Dolophilodes Medium Evening Sedge Caddisfly 3
Hexatoma Crane Fly 2
Amphinemura Spring Stonefly 2
Neophylax Caddisfly 2
Oemopteryx Stonefly 1
Cinygmula Dark Red Quill Mayfly 1
Rhyacophila Free-Living Caddisfly 1
Paraleptophlebia Blue Quill Mayfly 1
Bezzia Biting Midge 1
Diplectrona Net-Spinning Caddisfly 1
Micropsectra Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Parametriocnemus Non-Biting Midges 1
Ephemerella Sulphur Mayfly 1
Lumbriculidae Worm 1
Eccoptura Yellow Stone Stonefly 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.