MBSS Site Summary for: PATL-194-E-2004


Located on SOAPSTONE BR UT in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 4/22/2004 and again in the summer on 8/30/2004.

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 - 1.3 / 5.0
Benthic IBI Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,963 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 72 %
Agricultural Land Use 11 %
Forested Land Use 16 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 14/20 (Suboptimal)
Pool Quality
Pool Extent = 33 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 65 meters 		10/20 (Marginal)
Shading 90 %
Embeddedness 0 %


Stream Water Quality:
Water temperature 22.4 ° C
Dissolved oxygen (DO) 8 mg/L
pH (lab) 8.43
Conductivity 597 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1649 µeq/L
Dissolved organic carbon (DOC) 2 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 148
Longnose Dace 13
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Gartersnake
Northern Green Frog
Northern Two-Lined Salamander
Northern Watersnake

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 35
Dolophilodes Medium Evening Sedge Caddisfly 23
Simulium Black Fly 10
Tvetenia Non-Biting Midges 8
Eukiefferiella Non-Biting Midges 5
Hydropsyche Net-Spinning Caddisfly 5
Chaetocladius Non-Biting Midges 4
Clinocera Aquatic Dance Fly 4
Orthocladiinae Midge 3
Empididae Dance Fly 2
Antocha Crane Fly 1
Corynoneura Non-Biting Midges 1
Diamesinae Non-Biting Midges 1
Diplectrona Net-Spinning Caddisfly 1
Micropsectra Non-Biting Midges 1
Hemerodromia Tiny Fly 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.