MBSS Site Summary for: PRMO-103-R-2002

Site Photos

Field photo showing stream conditions at site PRMO-103-R-2002-1 (Opens in a new window) Field photo showing stream conditions at site PRMO-103-R-2002-2 (Opens in a new window) Field photo showing stream conditions at site PRMO-103-R-2002-3 (Opens in a new window) Field photo showing stream conditions at site PRMO-103-R-2002-4 (Opens in a new window) Field photo showing stream conditions at site PRMO-103-R-2002-5 (Opens in a new window)

Located on ROCK RUN in the Potomac River MO Cnty watershed, 8-digit code: 02140202.
This stream was visited in the spring on 3/5/2002 and again in the summer on 6/25/2002.

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 Poor - 1.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 319 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 43 %
Agricultural Land Use 42 %
Forested Land Use 14 %


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 12/20 (Suboptimal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 60 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 25 meters 		6/20 (Marginal)
Shading 98 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 19.1 ° C
Dissolved oxygen (DO) 5.6 mg/L
pH (lab) 6.95
Conductivity 340 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1533 µeq/L
Dissolved organic carbon (DOC) 4.1 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 31
Creek Chub 24
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Diplocladius Non-Biting Midges 47
Naididae Aquatic Worm 21
Tubificidae Aquatic Worm 13
Orthocladiinae Midge 6
Conchapelopia Non-Biting Midges 6
Ablabesmyia Non-Biting Midge 5
Calopteryx Damselfly 4
Rheosmittia Non-Biting Midges 4
Tanytarsus Non-Biting Midges 3
Dicrotendipes Non-Biting Midges 3
Physa Air-Breathing Freshwater Snail 3
Stictochironomus Non-Biting Midge 2
Corynoneura Non-Biting Midges 2
Zavrelimyia Non-Biting Midges 2
Amphinemura Spring Stonefly 1
Chironomus Non-Biting Midges 1
Enchytraeidae Aquatic Worm 1
Tipulidae Cranefly 1
Phaenopsectra Non-Biting Midges 1
Polypedilum 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.