MBSS Site Summary for: ANAC-302-X-2000

Site Photos

Field photo showing stream conditions at site ANAC-302-X-2000-15_14 (Opens in a new window) Field photo showing stream conditions at site ANAC-302-X-2000-15_15 (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 8/15/2000.

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 - 4.0 / 5.0
Benthic IBI Poor - 1.0 / 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 32,605 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 45.3 %
Agricultural Land Use 20.1 %
Forested Land Use 34.3 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 18/20 (Optimal)
Pool Quality
Pool Extent = 42 meters 		17/20 (Optimal)
Riffle Quality
Riffle Extent = 50 meters 		16/20 (Optimal)
Shading 17 %
Embeddedness 46 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 21 ° C
Dissolved oxygen (DO) 9.9 mg/L
pH (lab) 7.67
Conductivity 310 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1092 µeq/L
Dissolved organic carbon (DOC) 3.1 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 28 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Spottail Shiner 3117
Tessellated Darter 572
Swallowtail Shiner 510
Satinfin Shiner 361
Banded Killifish 231
Bluntnose Minnow 161
Redbreast Sunfish 132
Mummichog 115
White Sucker 110
Northern Hogsucker 56
Eastern Silvery Minnow 54
Common Shiner 47
American Eel 42
Silverjaw Minnow 30
Cutlip Minnow 23
Yellow Bullhead 20
Blacknose Dace 13
Longnose Dace 5
Pumpkinseed 5
Sea Lamprey 4
Striped Bass 4
Fathead Minnow 3
Bluegill 2
Common Carp 1
Golden Shiner 1
Green Sunfish 1
Largemouth Bass 1
Smallmouth Bass 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Common Five-Lined Skink

Crayfish:
No crayfish noted.

Exotic Plants:
Mile-A-Minute
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 27
Naididae Aquatic Worm 23
Orthocladiinae Midge 21
Cricotopus Non-Biting Midges 19
Tubificidae Aquatic Worm 5
Conchapelopia Non-Biting Midges 3
Zavrelimyia Non-Biting Midges 1
Simulium Black Fly 1
Ormosia Cranefly 1
Smittia European Non-Biting Midge 1
Cheumatopsyche Net-Spinning Caddisfly 1
Brillia 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.