MBSS Site Summary for: PRFR-103-R-2004


Located on ISRAEL CR in the Potomac River FR Cnty watershed, 8-digit code: 02140301.
This stream was visited in the spring on 3/24/2004 and again in the summer on 6/21/2004.

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 Fair - 3.7 / 5.0
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,823 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 5 %
Agricultural Land Use 43 %
Forested Land Use 51 %


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 6/20 (Marginal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 47 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 37 meters 		7/20 (Marginal)
Shading 85 %
Embeddedness 55 %
The embeddedness, a measure of silt on the stream bottom, was 55%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 18.8 ° C
Dissolved oxygen (DO) 8.5 mg/L
pH (lab) 7.41
Conductivity 147 µmho/cm
Alkalinity
(acid neutralizing capacity) 		507.1 µeq/L
Dissolved organic carbon (DOC) 1.3 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 311
Rosyside Dace 101
Fantail Darter 57
Creek Chub 48
River Chub 17
White Sucker 11
Bluegill 5
Tessellated Darter 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Spring Peeper
Northern Two-Lined Salamander
Pickerel Frog

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
Hydrobaenus Midge 19
Optioservus Riffle Beetle 16
Orthocladius Non-Biting Midges 14
Ephemerella Sulphur Mayfly 13
Cheumatopsyche Net-Spinning Caddisfly 9
Neophylax Caddisfly 8
Parametriocnemus Non-Biting Midges 6
Thienemannimyia group Non-Biting Midges 4
Antocha Crane Fly 4
Chelifera Aquatic Dance Fly 2
Prosimulium Black Fly 2
Diamesa Bloodworm 2
Micropsectra Non-Biting Midges 2
Lype Net Tube Caddisfly 2
Stenonema Flatheaded Mayfly 2
Caecidotea Isopod 2
Macronychus Riffle Beetle 2
Prostoia Spring Stonefly 2
Rheosmittia Non-Biting Midges 1
Acerpenna Tiny Blue-Winged Olive Mayflies 1
Tropisternus Water Scavenger Beetle 1
Amphinemura Spring Stonefly 1
Orthocladiinae Midge 1
Agarodes 1
Anchytarsus Beetle 1
Stenelmis Beetle 1
Calopteryx Damselfly 1
Stenochironomus European Non-Biting Midge 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.