MBSS Site Summary for: ANAC-116-R-2004

Site Photos

Field photo showing stream conditions at site ANAC-116-R-2004-36 (Opens in a new window) Field photo showing stream conditions at site ANAC-116-R-2004-37 (Opens in a new window)

Located on SLIGO CR 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 6/8/2004.

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 Poor - 1.3 / 5.0
Benthic IBI Poor - 1.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 906 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 77 %
Agricultural Land Use 5 %
Forested Land Use 17 %


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 13/20 (Suboptimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 40 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 42 meters 		11/20 (Suboptimal)
Shading 92 %
Embeddedness 20 %


Stream Water Quality:
Water temperature 19.2 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 7.19
Conductivity 214 µmho/cm
Alkalinity
(acid neutralizing capacity) 		912.8 µeq/L
Dissolved organic carbon (DOC) 3.2 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 6 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 95
Creek Chub 14
White Sucker 12
Green Sunfish 5
American Eel 1
Goldfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
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
Thienemannimyia group Non-Biting Midges 18
Crangonyx Amphipod 16
Brillia Non-Biting Midges 15
Eukiefferiella Non-Biting Midges 13
Orthocladius Non-Biting Midges 13
Cheumatopsyche Net-Spinning Caddisfly 9
Tvetenia Non-Biting Midges 7
Rheosmittia Non-Biting Midges 6
Hydropsyche Net-Spinning Caddisfly 6
Physa Air-Breathing Freshwater Snail 5
Tipula Crane Fly 3
Antocha Crane Fly 2
Zavrelimyia Non-Biting Midges 2
Lumbriculidae Worm 1
Dicrotendipes Non-Biting Midges 1
Tipulidae Cranefly 1
Calopteryx Damselfly 1
Isotomurus Elongate-Bodied Springtail 1
Gordiidae Horsehair 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.