MBSS Site Summary for: NANJ-111-R-2000

Site Photos

Field photo showing stream conditions at site NANJ-111-R-2000-01 (Opens in a new window) Field photo showing stream conditions at site NANJ-111-R-2000-02 (Opens in a new window)

Located on MILL RUN 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 6/14/2000.

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 - 4.7 / 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 291 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 8.9 %
Agricultural Land Use 9 %
Forested Land Use 81.9 %


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 65 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 15 meters 		4/20 (Poor)
Shading 95 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 18.1 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 5.55
Conductivity 40 µmho/cm
Alkalinity
(acid neutralizing capacity) 		17.7 µeq/L
Dissolved organic carbon (DOC) 1.9 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
Eastern Mudminnow 74
Least Brook Lamprey 30
Creek Chubsucker 19
Creek Chub 16
American Eel 4
Blacknose Dace 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Red Salamander
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
Amphinemura Spring Stonefly 16
Leuctridae Rolledwinged Stonefly 15
Cricotopus Non-Biting Midges 7
Naididae Aquatic Worm 6
Habrophlebia Prong-Gilled Mayfly 6
Oulimnius Riffle Beetle 5
Eukiefferiella Non-Biting Midges 5
Prosimulium Black Fly 5
Stegopterna Black Fly 5
Chloroperlidae Green Stonefly 5
Gomphidae Clubtail Dragonfly 3
Eurylophella Mayfly 2
Nigronia Megaloptera (Dark Fishfly) 2
Parametriocnemus Non-Biting Midges 2
Diplocladius Non-Biting Midges 2
Isotomurus Elongate-Bodied Springtail 2
Unniella Non-Biting Midge 2
Trissopelopia Non-Biting Midges 2
Dytiscidae Predaceous Diving Beetle 1
Polycentropodidae Trupetnet And Tubemaking Caddisfly 1
Eccoptura Yellow Stone Stonefly 1
Probezzia Biting Midges 1
Tanytarsus Non-Biting Midges 1
Diplectrona Net-Spinning Caddisfly 1
Krenopelopia Non-Biting Midge 1
Parachaetocladius Non-Biting Midge 1
Tipula Crane Fly 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.