MBSS Site Summary for: PRLT-113-R-2002

Site Photos

Field photo showing stream conditions at site PRLT-113-R-2002-376 (Opens in a new window) Field photo showing stream conditions at site PRLT-113-R-2002-377 (Opens in a new window) Field photo showing stream conditions at site PRLT-113-R-2002-378 (Opens in a new window) Field photo showing stream conditions at site PRLT-113-R-2002-561 (Opens in a new window) Field photo showing stream conditions at site PRLT-113-R-2002-563 (Opens in a new window)

Located on TARLETON BR in the Potomac River L tidal watershed, 8-digit code: 02140101.
This stream was visited in the spring on 3/11/2002 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 - 2.3 / 5.0
Benthic IBI Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 351 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 3 %
Agricultural Land Use 50 %
Forested Land Use 44 %


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

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = 47 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 28 meters 		5/20 (Poor)
Shading 97 %
Embeddedness 15 %


Stream Water Quality:
Water temperature 20.9 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 6.16
Conductivity 90 µmho/cm
Alkalinity
(acid neutralizing capacity) 		69.9 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 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 87
Creek Chubsucker 11
American Eel 8
Golden Shiner 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Gray Treefrog
Northern Green Frog
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Oulimnius Riffle Beetle 21
Leuctridae Rolledwinged Stonefly 17
Stenonema Flatheaded Mayfly 12
Anchytarsus Beetle 6
Diplectrona Net-Spinning Caddisfly 6
Zavrelimyia Non-Biting Midges 6
Acerpenna Tiny Blue-Winged Olive Mayflies 6
Psephenus Water Penny 6
Eurylophella Mayfly 5
Cheumatopsyche Net-Spinning Caddisfly 5
Habrophlebia Prong-Gilled Mayfly 4
Tanytarsus Non-Biting Midges 3
Polycentropus Tube Maker Caddisfly 3
Chloroperlidae Green Stonefly 3
Simulium Black Fly 2
Eukiefferiella Non-Biting Midges 2
Ablabesmyia Non-Biting Midge 2
Trissopelopia Non-Biting Midges 2
Limnephilidae Northern Casemaker Caddisfly 1
Leptophlebia Pronggilled Mayfly 1
Microcylloepus Riffle Beetle 1
Cordulegaster Spiketail Dragonfly 1
Apsectrotanypus Non-Biting Midges 1
Diplocladius Non-Biting Midges 1
Orthocladiinae Midge 1
Tipula Crane Fly 1
Ceratopogonidae Biting Midge 1
Prosimulium Black Fly 1
Somatochlora 1
Spirosperma Aquatic Oligochaete 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.