MBSS Site Summary for: COCA-101-N-2003

Site Photos

Field photo showing stream conditions at site COCA-101-N-2003-1 (Opens in a new window) Field photo showing stream conditions at site COCA-101-N-2003-2 (Opens in a new window) Field photo showing stream conditions at site COCA-101-N-2003-3 (Opens in a new window) Field photo showing stream conditions at site COCA-101-N-2003-1 (Opens in a new window) Field photo showing stream conditions at site COCA-101-N-2003-2 (Opens in a new window)

Located on UT POTOMAC RIVER in the Potomac River WA Cnty watershed, 8-digit code: 02140501.
This stream was visited in the spring on 4/17/2003 and again in the summer on 7/14/2003.

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 - 1.3 / 5.0
Benthic IBI Poor - 2.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 657 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 26 %
Agricultural Land Use 16 %
Forested Land Use 58 %


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

Physical Stream Habitat
Instream Habitat 7/20 (Marginal)
Epifaunal Substrate 7/20 (Marginal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 21 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 60 meters 		8/20 (Marginal)
Shading 97 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 16.9 ° C
Dissolved oxygen (DO) 8.1 mg/L
pH (lab) 7.72
Conductivity 687 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1004 µeq/L
Dissolved organic carbon (DOC) 1.8 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 17
Creek Chub 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Canada Thistle
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Stenelmis Beetle 45
Psephenus Water Penny 10
Diamesa Bloodworm 7
Leuctra  Rolled-Winged Stonefly 6
Optioservus Riffle Beetle 6
Parametriocnemus Non-Biting Midges 5
Thienemannimyia group Non-Biting Midges 5
Amphinemura Spring Stonefly 4
Diplectrona Net-Spinning Caddisfly 4
Orthocladius Non-Biting Midges 4
Diamesinae Non-Biting Midges 3
Polypedilum Non-Biting Midges 3
Trissopelopia Non-Biting Midges 2
Chimarra Fingernet Caddisfly 2
Pseudolimnophila Crane Fly 2
Isoperla Stripetail Stonefly 2
Lumbriculidae Worm 1
Tipula Crane Fly 1
Chloroperlidae Green Stonefly 1
Caecidotea Isopod 1
Nilotanypus 1
Zavrelimyia Non-Biting Midges 1
Perlodidae Perlodid Stonefly 1
Rheocricotopus Non-Biting Midges 1
Tanytarsus Non-Biting Midges 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.