MBSS Site Summary for: ANAC-118-R-2004

Site Photos

Field photo showing stream conditions at site ANAC-118-R-2004-38 (Opens in a new window) Field photo showing stream conditions at site ANAC-118-R-2004-39 (Opens in a new window)

Located on PAINT BR UT 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 6/9/2004.

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 - 3.7 / 5.0
Benthic IBI Fair - 3.6 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 589 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 60 %
Agricultural Land Use 4 %
Forested Land Use 33 %


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 16/20 (Optimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 99 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.


Stream Water Quality:
Water temperature 19.3 ° C
Dissolved oxygen (DO) 7 mg/L
pH (lab) 6.91
Conductivity 180 µmho/cm
Alkalinity
(acid neutralizing capacity) 		451.6 µeq/L
Dissolved organic carbon (DOC) 5 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 10 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 580
Tessellated Darter 47
Creek Chubsucker 38
Creek Chub 30
American Eel 21
Green Sunfish 18
Largemouth Bass 13
Blacknose Dace 5
Bluegill 3
White Sucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
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
Orthocladius Non-Biting Midges 34
Tribelos Non-Biting Midges 11
Caecidotea Isopod 10
Synurella Amphipod 9
Thienemannimyia group Non-Biting Midges 6
Micropsectra Non-Biting Midges 5
Somatochlora 5
Physa Air-Breathing Freshwater Snail 3
Calopteryx Damselfly 3
Molanna 3
Eukiefferiella Non-Biting Midges 2
Lumbriculidae Worm 2
Stratiomyidae Soldier Fly 1
Boyeria Spotted Darner Dragonfly 1
Stenochironomus European Non-Biting Midge 1
Phaenopsectra Non-Biting Midges 1
Pseudorthocladius Non-Biting Midges 1
Tanypodinae Non-Biting Midges 1
Tanytarsini Non-Biting Midges 1
Sialis Alderfly 1
Enchytraeidae Aquatic Worm 1
Orthocladiinae Midge 1
Cheumatopsyche Net-Spinning Caddisfly 1
Ablabesmyia Non-Biting Midge 1
Chironomus 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.