MBSS Site Summary for: ANAC-303-X-2000

Site Photos

Field photo showing stream conditions at site ANAC-303-X-2000-15_16 (Opens in a new window)

Located on NORTHEAST BR ANACOSTIA in the Anacostia River watershed, 8-digit code: 02140205.
This stream was visited in the spring on 4/24/2000 and again in the summer on 6/5/2000.

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 Good - 4.3 / 5.0
Benthic IBI Poor - 1.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 46,669 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 37.2 %
Agricultural Land Use 19.4 %
Forested Land Use 40 %


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

Physical Stream Habitat
Instream Habitat 8/20 (Marginal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 35 meters 		14/20 (Suboptimal)
Shading 6 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 20.9 ° C
Dissolved oxygen (DO) 11.5 mg/L
pH (lab) 7.53
Conductivity 270 µmho/cm
Alkalinity
(acid neutralizing capacity) 		723.6 µeq/L
Dissolved organic carbon (DOC) 3.9 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 18 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Banded Killifish 276
Redbreast Sunfish 202
Mummichog 175
Satinfin Shiner 140
Swallowtail Shiner 107
American Eel 95
Spottail Shiner 78
Bluntnose Minnow 24
Pumpkinseed 24
Yellow Bullhead 24
Tessellated Darter 18
Sea Lamprey 15
White Sucker 8
Bluegill 4
Brown Bullhead 4
Blacknose Dace 3
Creek Chubsucker 2
Northern Hogsucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Northern Watersnake

Crayfish:
No crayfish noted.

Exotic Plants:
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 85
Orthocladiinae Midge 31
Gordiidae Horsehair Worm 2
Simuliidae Black Fly 1
Hydropsyche Net-Spinning Caddisfly 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.