MBSS Site Summary for: PRUT-106-R-2001

Site Photos

Field photo showing stream conditions at site PRUT-106-R-2001-20 (Opens in a new window) Field photo showing stream conditions at site PRUT-106-R-2001-21 (Opens in a new window)

Located on HENSON CR UT1 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 8/6/2001.

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 - 2.3 / 5.0
Benthic IBI Poor - 2.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 325 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 74 %
Agricultural Land Use 1 %
Forested Land Use 25 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 53 meters 		9/20 (Marginal)
Riffle Quality
Riffle Extent = 29 meters 		10/20 (Marginal)
Shading 75 %
Embeddedness 15 %


Stream Water Quality:
Water temperature 23.5 ° C
Dissolved oxygen (DO) 7.4 mg/L
pH (lab) 6.98
Conductivity 240 µmho/cm
Alkalinity
(acid neutralizing capacity) 		409.3 µeq/L
Dissolved organic carbon (DOC) 2.4 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 65
Creek Chub 19
Green Sunfish 8
American Eel 2
Redbreast Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Northern Two-Lined Salamander

Crayfish:
Cambaridae

Exotic Plants:
Japanese Honeysuckle
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 26
Conchapelopia Non-Biting Midges 13
Zavrelimyia Non-Biting Midges 13
Tipula Crane Fly 9
Phaenopsectra Non-Biting Midges 4
Trissopelopia Non-Biting Midges 4
Polypedilum Non-Biting Midges 3
Tanypodinae Non-Biting Midges 3
Gordiidae Horsehair Worm 3
Tubificidae Aquatic Worm 3
Argia Narrow-Winged Damselfly 3
Orthocladiinae Midge 2
Lumbriculidae Worm 2
Brillia Non-Biting Midges 1
Physa Air-Breathing Freshwater Snail 1
Limnephilidae Northern Casemaker Caddisfly 1
Pisidiidae Pill Clam 1
Polycentropus Tube Maker Caddisfly 1
Hydroporus Water Beetle 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.