MBSS Site Summary for: ANAC-301-X-2000

Site Photos

Field photo showing stream conditions at site ANAC-301-X-2000-15_11 (Opens in a new window) Field photo showing stream conditions at site ANAC-301-X-2000-15_11 (Opens in a new window) Field photo showing stream conditions at site ANAC-301-X-2000-15_12 (Opens in a new window)

Located on NORTHWEST 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 Fair - 3.7 / 5.0
Benthic IBI Poor - 1.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 33,254 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 45.9 %
Agricultural Land Use 19.7 %
Forested Land Use 34 %


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 2/20 (Poor)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		13/20 (Suboptimal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 5 %
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 18.5 ° C
Dissolved oxygen (DO) 9 mg/L
pH (lab) 7.36
Conductivity 320 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1038 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 21 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Redbreast Sunfish 453
Spottail Shiner 205
White Sucker 158
Banded Killifish 68
Pumpkinseed 57
American Eel 54
Swallowtail Shiner 49
Mummichog 48
Bluntnose Minnow 24
Satinfin Shiner 17
Yellow Bullhead 12
Tessellated Darter 11
Green Sunfish 10
Brown Bullhead 8
Golden Shiner 8
Bluegill 4
Cutlip Minnow 3
Common Carp 2
Eastern Mosquitofish 2
Sea Lamprey 1
Yellow Perch 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern Snapping Turtle

Crayfish:
No crayfish noted.

Exotic Plants:
Canada Thistle
Mile-A-Minute
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 22
Cricotopus Non-Biting Midges 22
Enchytraeidae Aquatic Worm 13
Orthocladiinae Midge 12
Polypedilum Non-Biting Midges 11
Tubificidae Aquatic Worm 10
Naididae Aquatic Worm 6
Ablabesmyia Non-Biting Midge 2
Smittia European Non-Biting Midge 2
Crangonyx Amphipod 2
Gordiidae Horsehair Worm 1
Zavrelimyia Non-Biting Midges 1
Collembola Springtail 1
Hemerodromia Tiny Fly 1
Lumbriculidae Worm 1
Limnophyes Non-Biting Midge 1
Peltodytes Crawling Water Beetle 1
Calopteryx Damselfly 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.