MBSS Site Summary for: HO-N-019-304-96


Located on DEEP RUN in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 3/6/1996 and again in the summer on 9/3/1996.

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 - 3.7 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 12,109 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 21.2 %
Agricultural Land Use 24.7 %
Forested Land Use 51.8 %


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

Physical Stream Habitat
Instream Habitat 6/20 (Marginal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 8/20 (Marginal)
Pool Quality
Pool Extent = meters 		17/20 (Optimal)
Riffle Quality 0/20 (Poor)
Shading 95 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.


Stream Water Quality:
Water temperature 20.7 ° C
Dissolved oxygen (DO) 9.2 mg/L
pH (lab) 7.4
Conductivity 332 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1022 µeq/L
Dissolved organic carbon (DOC) 4.9 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
White Sucker 43
Bluegill 32
American Eel 17
Fallfish 15
Creek Chub 11
Tessellated Darter 11
Redbreast Sunfish 4
Common Shiner 3
Green Sunfish 3
Largemouth Bass 3
Rock Bass 3
Spotfin Shiner 3
Pumpkinseed 2
Northern Hogsucker 1
Yellow Bullhead 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern American Toad
Wood 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
Hydrobaenus Midge 13
Cheumatopsyche Net-Spinning Caddisfly 11
Hydropsyche Net-Spinning Caddisfly 2
Stenonema Flatheaded Mayfly 2
Nigronia Megaloptera (Dark Fishfly) 1
Tubificidae Aquatic Worm 1
Stylogomphus Clubtail Dragonfly 1
Hexatoma Crane Fly 1
Tipula Crane Fly 1
Thienemannimyia Non-Biting Midges 1
Optioservus Riffle Beetle 1
Centroptilum Small Minnow Mayfly 1
Ancyronyx Spider Riffle Beetle 1
Prostoia Spring 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.