MBSS Site Summary for: ANAC-304-R-2004

Site Photos

Field photo showing stream conditions at site ANAC-304-R-2004-32 (Opens in a new window) Field photo showing stream conditions at site ANAC-304-R-2004-33 (Opens in a new window) Field photo showing stream conditions at site ANAC-304-R-2004-34 (Opens in a new window) Field photo showing stream conditions at site ANAC-304-R-2004-35 (Opens in a new window)

Located on NORTHWEST BR ANACOSTIA R in the Anacostia River watershed, 8-digit code: 02140205.
This stream was visited in the spring on 3/4/2004 and again in the summer on 7/1/2004.

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 Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 19,640 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 43 %
Agricultural Land Use 28 %
Forested Land Use 27 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 8/20 (Marginal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 95 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 19.9 ° C
Dissolved oxygen (DO) 7.1 mg/L
pH (lab) 7.98
Conductivity 254 µmho/cm
Alkalinity
(acid neutralizing capacity) 		872.9 µeq/L
Dissolved organic carbon (DOC) 1.6 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 16 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Spottail Shiner 79
Tessellated Darter 74
American Eel 61
Swallowtail Shiner 61
Cutlip Minnow 38
Satinfin Shiner 37
White Sucker 27
Blacknose Dace 18
Common Shiner 10
Northern Hogsucker 9
Redbreast Sunfish 8
Green Sunfish 7
Bluegill 6
Longnose Dace 2
Bluntnose Minnow 1
Yellow Bullhead 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

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

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Mimosa
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cheumatopsyche Net-Spinning Caddisfly 20
Hydropsyche Net-Spinning Caddisfly 18
Orthocladius Non-Biting Midges 12
Hydrobaenus Midge 8
Rheosmittia Non-Biting Midges 7
Thienemannimyia group Non-Biting Midges 7
Cardiocladius Non-Biting Midge 5
Parametriocnemus Non-Biting Midges 4
Antocha Crane Fly 3
Ancyronyx Spider Riffle Beetle 3
Eukiefferiella Non-Biting Midges 2
Paratanytarsus Non-Biting Midges 2
Tanytarsini Non-Biting Midges 1
Brillia Non-Biting Midges 1
Corynoneura Non-Biting Midges 1
Calopteryx Damselfly 1
Musculium Fingernail Clam 1
Stenonema Flatheaded Mayfly 1
Caecidotea Isopod 1
Coenagrionidae Narrowwinged Damselfly 1
Xenochironomus 1
Crangonyx Amphipod 1
Naididae Aquatic Worm 1
Lumbriculidae 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.