MBSS Site Summary for: NANJ-115-R-2000

Site Photos

Field photo showing stream conditions at site NANJ-115-R-2000-01 (Opens in a new window) Field photo showing stream conditions at site NANJ-115-R-2000-02 (Opens in a new window) Field photo showing stream conditions at site NANJ-115-R-2000-03 (Opens in a new window)

Located on HILL TOP FORK UT1 in the Nanjemoy Creek watershed, 8-digit code: 02140110.
This stream was visited in the spring on 3/8/2000 and again in the summer on 6/15/2000.

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 - 4.3 / 5.0
Benthic IBI Good - 4.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 876 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 1.8 %
Agricultural Land Use 4.9 %
Forested Land Use 77.5 %


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 11/20 (Suboptimal)
Velocity/Depth Diversity 14/20 (Suboptimal)
Pool Quality
Pool Extent = 55 meters 		18/20 (Optimal)
Riffle Quality
Riffle Extent = 20 meters 		11/20 (Suboptimal)
Shading 80 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 18.6 ° C
Dissolved oxygen (DO) 7.8 mg/L
pH (lab) 6.09
Conductivity 30 µmho/cm
Alkalinity
(acid neutralizing capacity) 		54.4 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 11 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Redbreast Sunfish 30
Creek Chubsucker 18
Tessellated Darter 16
Eastern Mudminnow 13
Creek Chub 7
Blacknose Dace 6
Chain Pickerel 6
Rosyside Dace 4
American Eel 3
Least Brook Lamprey 2
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Simulium Black Fly 30
Stempellina 25
Prosimulium Black Fly 20
Unniella Non-Biting Midge 9
Stegopterna Black Fly 7
Eukiefferiella Non-Biting Midges 6
Stenonema Flatheaded Mayfly 5
Acerpenna Tiny Blue-Winged Olive Mayflies 4
Stenelmis Beetle 3
Rheocricotopus Non-Biting Midges 3
Diplocladius Non-Biting Midges 3
Hydropsychidae Common Netspinner Caddisfly 1
Libellulidae Skimmer Dragonfly 1
Ephemerellidae Spiny Crawler Mayfly 1
Orthocladius Non-Biting Midges 1
Naididae Aquatic Worm 1
Rhyacophila Free-Living Caddisfly 1
Cheumatopsyche Net-Spinning Caddisfly 1
Diplectrona Net-Spinning Caddisfly 1
Hydropsyche Net-Spinning Caddisfly 1
Procladius Non-Biting Midge 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.