MBSS Site Summary for: HO-N-026-305-95


Located on DEEP RUN in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 4/18/1995 and again in the summer on 7/24/1995.

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 - 3.7 / 5.0
Benthic IBI Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 4,945 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 23.3 %
Agricultural Land Use 32.8 %
Forested Land Use 42.9 %


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

Physical Stream Habitat
Instream Habitat 7/20 (Marginal)
Epifaunal Substrate 8/20 (Marginal)
Velocity/Depth Diversity 16/20 (Optimal)
Pool Quality
Pool Extent = meters 		13/20 (Suboptimal)
Riffle Quality 12/20 (Suboptimal)
Shading 70 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 26.7 ° C
Dissolved oxygen (DO) 7.7 mg/L
pH (lab) 7.68
Conductivity 344 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1125 µeq/L
Dissolved organic carbon (DOC) 3 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 15 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Creek Chub 123
Blacknose Dace 73
Rosyside Dace 60
White Sucker 47
Eastern Mudminnow 29
Tessellated Darter 28
Swallowtail Shiner 26
Green Sunfish 14
Blue Ridge Sculpin 6
Fallfish 5
Common Shiner 3
Lepomis Hybrid 2
Pumpkinseed 2
Cutlip Minnow 1
Longnose Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladiinae A Non-Biting Midges 45
Naididae Aquatic Worm 5
Rheocricotopus Non-Biting Midges 5
Conchapelopia Non-Biting Midges 5
Agabus Predatory Aquatic Beetle 4
Calopteryx Damselfly 3
Ablabesmyia Non-Biting Midge 3
Clinocera Aquatic Dance Fly 2
Hemerodromia Tiny Fly 2
Centroptilum Small Minnow Mayfly 1
Boyeria Spotted Darner Dragonfly 1
Collembola Springtail 1
Paratanytarsus Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Eurylophella Mayfly 1
Orthocladiinae Midge 1
Cheumatopsyche Net-Spinning Caddisfly 1
Hydropsyche Net-Spinning Caddisfly 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.