MBSS Site Summary for: AL-A-465-311-96


Located on COLLIER RUN in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 4/24/1996 and again in the summer on 6/20/1996.

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 Fair - 3.3 / 5.0
Benthic IBI Good - 4.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 6,298 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 10.8 %
Forested Land Use 89 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = meters 		12/20 (Suboptimal)
Riffle Quality 16/20 (Optimal)
Shading 50 %
Embeddedness 0 %


Stream Water Quality:
Water temperature 18.2 ° C
Dissolved oxygen (DO) 8.6 mg/L
pH (lab) 7.43
Conductivity 95 µmho/cm
Alkalinity
(acid neutralizing capacity) 		560.9 µeq/L
Dissolved organic carbon (DOC) 1.5 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 9 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 612
Creek Chub 90
Potomac Sculpin 55
Central Stoneroller 37
Fantail Darter 28
Longnose Dace 18
Greenside Darter 2
White Sucker 2
Northern Hogsucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern American Toad
Eastern Gartersnake
Long-Tailed Salamander
Northern Red Salamander
Northern Two-Lined Salamander

Crayfish:
Cambarus bartonii bartonii

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 29
Baetidae Small Minnow Mayfly 15
Cinygmula Dark Red Quill Mayfly 8
Micropsectra Non-Biting Midges 6
Polypedilum Non-Biting Midges 6
Amphinemura Spring Stonefly 5
Parametriocnemus Non-Biting Midges 3
Perlodidae Perlodid Stonefly 3
Stegopterna Black Fly 3
Diamesa Bloodworm 3
Drunella Blue-Winged Olive Mayfly 3
Leuctra  Rolled-Winged Stonefly 2
Clinocera Aquatic Dance Fly 2
Prosimulium Black Fly 2
Antocha Crane Fly 2
Isonychia Slate Drake Mayfly 2
Optioservus Riffle Beetle 1
Orthocladius Non-Biting Midges 1
Culicoides 1
Neophylax Caddisfly 1
Chimarra Fingernet Caddisfly 1
Stenonema Flatheaded Mayfly 1
Acroneuria Golden Stoneflies 1
Cricotopus/Orthocladius Midge 1
Cheumatopsyche Net-Spinning Caddisfly 1
Larsia Non-Biting Midge 1
Conchapelopia Non-Biting Midges 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.