MBSS Site Summary for: PRUT-108-R-2001

Site Photos

Field photo showing stream conditions at site PRUT-108-R-2001-17 (Opens in a new window) Field photo showing stream conditions at site PRUT-108-R-2001-18 (Opens in a new window) Field photo showing stream conditions at site PRUT-108-R-2001-19 (Opens in a new window) Field photo showing stream conditions at site PRUT-108-R-2001-20 (Opens in a new window) Field photo showing stream conditions at site PRUT-108-R-2001-21 (Opens in a new window)

Located on HENSON CR in the Potomac River U tidal watershed, 8-digit code: 02140201.
This stream was visited in the spring on 3/20/2001 and again in the summer on 7/10/2001.

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 - 2.7 / 5.0
Benthic IBI Poor - 2.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,137 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 83 %
Agricultural Land Use 3 %
Forested Land Use 12 %


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 8/20 (Marginal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 46 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 32 meters 		11/20 (Suboptimal)
Shading 85 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 22.7 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 6.69
Conductivity 370 µmho/cm
Alkalinity
(acid neutralizing capacity) 		376.3 µeq/L
Dissolved organic carbon (DOC) 2.8 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 8 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 179
Creek Chub 39
Swallowtail Shiner 9
American Eel 3
White Sucker 3
Pumpkinseed 2
Tessellated Darter 2
Redbreast Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Tubificidae Aquatic Worm 5
Conchapelopia Non-Biting Midges 5
Cricotopus/Orthocladius Midge 4
Tipula Crane Fly 3
Prostoma Freshwater Nemertean (Ribbon Worm) 3
Gordiidae Horsehair Worm 3
Limnodrilus Worm 3
Phaenopsectra Non-Biting Midges 2
Calopteryx Damselfly 2
Menetus Air Breathing Freshwater Snail 1
Chelifera Aquatic Dance Fly 1
Spirosperma Aquatic Oligochaete Worm 1
Orthocladiinae Midge 1
Ablabesmyia Non-Biting Midge 1
Limnophyes Non-Biting Midge 1
Polypedilum Non-Biting Midges 1
Rheocricotopus Non-Biting Midges 1
Zavrelimyia Non-Biting Midges 1
Hirudinea Leech 1
Cricotopus Non-Biting Midges 1
Lumbriculidae Worm 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.