MBSS Site Summary for: PRLT-104-R-2002

Site Photos

Field photo showing stream conditions at site PRLT-104-R-2002-379 (Opens in a new window) Field photo showing stream conditions at site PRLT-104-R-2002-380 (Opens in a new window) Field photo showing stream conditions at site PRLT-104-R-2002-564 (Opens in a new window)

Located on BELVEDERE CR 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 - 2.0 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 192 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 1 %
Agricultural Land Use 2 %
Forested Land Use 97 %


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = 60 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 15 meters 		6/20 (Marginal)
Shading 97 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 21.8 ° C
Dissolved oxygen (DO) 6.7 mg/L
pH (lab) 5.63
Conductivity 60 µmho/cm
Alkalinity
(acid neutralizing capacity) 		17.3 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 23
American Eel 3
Creek Chubsucker 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern Gartersnake
Northern Green Frog
Northern Two-Lined Salamander
Southern Leopard 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
Leuctra  Rolled-Winged Stonefly 17
Diplectrona Net-Spinning Caddisfly 14
Parametriocnemus Non-Biting Midges 12
Simulium Black Fly 12
Conchapelopia Non-Biting Midges 6
Rheosmittia Non-Biting Midges 5
Polypedilum Non-Biting Midges 4
Oulimnius Riffle Beetle 3
Lumbriculidae Worm 3
Crangonyx Amphipod 3
Synurella Amphipod 2
Hexatoma Crane Fly 2
Phaenopsectra Non-Biting Midges 2
Unniella Non-Biting Midge 2
Caecidotea Isopod 2
Trissopelopia Non-Biting Midges 2
Tvetenia Non-Biting Midges 1
Zavrelimyia Non-Biting Midges 1
Eccoptura Yellow Stone Stonefly 1
Baetidae Small Minnow Mayfly 1
Nigronia Megaloptera (Dark Fishfly) 1
Corynoneura Non-Biting Midges 1
Pseudolimnophila Crane Fly 1
Chimarra Fingernet Caddisfly 1
Gordiidae Horsehair Worm 1
Perlidae Common Stonefly 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.