MBSS Site Summary for: PRUT-103-R-2001

Site Photos

Field photo showing stream conditions at site PRUT-103-R-2001-3 (Opens in a new window) Field photo showing stream conditions at site PRUT-103-R-2001-4 (Opens in a new window)

Located on HUNTERS MILL BRANCH in the Potomac River U tidal watershed, 8-digit code: 02140201.
This stream was visited in the spring on 3/19/2001 and again in the summer on 7/12/2001.

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 - 2.0 / 5.0
Benthic IBI Fair - 3.6 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 77 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 36 %
Agricultural Land Use 19 %
Forested Land Use 41 %


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

Physical Stream Habitat
Instream Habitat 9/20 (Marginal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 48 meters 		7/20 (Marginal)
Riffle Quality
Riffle Extent = 27 meters 		6/20 (Marginal)
Shading 98 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 18.8 ° C
Dissolved oxygen (DO) 7.4 mg/L
pH (lab) 6.44
Conductivity 190 µmho/cm
Alkalinity
(acid neutralizing capacity) 		159.4 µeq/L
Dissolved organic carbon (DOC) 1.9 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Creek Chub 66
Blacknose Dace 30
Rosyside Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern American Toad
Northern Green Frog
Rough Greensnake

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Mile-A-Minute
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Pisidiidae Pill Clam 19
Conchapelopia Non-Biting Midges 14
Ablabesmyia Non-Biting Midge 4
Pseudolimnophila Crane Fly 4
Chloroperlidae Green Stonefly 4
Eurylophella Mayfly 4
Ceratopogon Biting Midge 4
Zavrelimyia Non-Biting Midges 4
Tribelos Non-Biting Midges 4
Trissopelopia Non-Biting Midges 4
Tvetenia Non-Biting Midges 3
Polypedilum Non-Biting Midges 3
Tanytarsus Non-Biting Midges 3
Diplectrona Net-Spinning Caddisfly 3
Lumbriculidae Worm 2
Lepidoptera Aquatic Moth 2
Asellidae Aquatic Sow Bug 1
Tubificidae Aquatic Worm 1
Stenelmis Beetle 1
Antocha Crane Fly 1
Phagocata 1
Prodiamesa 1
Stilobezzia 1
Nigronia Megaloptera (Dark Fishfly) 1
Heterotrissocladius European Non-Biting Midge 1
Limnophyes Non-Biting Midge 1
Parachaetocladius Non-Biting Midge 1
Eukiefferiella Non-Biting Midges 1
Parametriocnemus 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.