MBSS Site Summary for: ANAC-311-R-2004

Site Photos

Field photo showing stream conditions at site ANAC-311-R-2004-5 (Opens in a new window) Field photo showing stream conditions at site ANAC-311-R-2004-6 (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 3/2/2004 and again in the summer on 3/2/2004.

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 - 3.3 / 5.0
Benthic IBI Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 16,120 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 38 %
Agricultural Land Use 33 %
Forested Land Use 28 %


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

Physical Stream Habitat
Instream Habitat 17/20 (Optimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = 45 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 50 meters 		16/20 (Optimal)
Shading 84 %
Embeddedness 20 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 19.4 ° C
Dissolved oxygen (DO) 7.6 mg/L
pH (lab) 7.5
Conductivity 231 µmho/cm
Alkalinity
(acid neutralizing capacity) 		954.8 µeq/L
Dissolved organic carbon (DOC) 2.7 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 17 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 112
Bluntnose Minnow 75
Longnose Dace 71
Spottail Shiner 63
Tessellated Darter 60
Fantail Darter 34
Swallowtail Shiner 21
Northern Hogsucker 19
White Sucker 19
Satinfin Shiner 11
Common Shiner 9
Creek Chub 9
Cutlip Minnow 6
Redbreast Sunfish 6
Margined Madtom 2
Largemouth Bass 1
Rosyside Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern American Toad
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

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

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cheumatopsyche Net-Spinning Caddisfly 26
Hydropsyche Net-Spinning Caddisfly 11
Tvetenia Non-Biting Midges 11
Sympotthastia Non-Biting Midges 6
Hydrobaenus Midge 4
Eukiefferiella Non-Biting Midges 4
Tipula Crane Fly 4
Rheosmittia Non-Biting Midges 3
Stenonema Flatheaded Mayfly 2
Diamesa Bloodworm 2
Antocha Crane Fly 2
Cardiocladius Non-Biting Midge 2
Corynoneura Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Parametriocnemus Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Simulium Black Fly 1
Thienemannimyia group 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.