MBSS Site Summary for: CH-S-105-119-95


Located on JANE BERRYS RUN UT1 in the Nanjemoy Creek watershed, 8-digit code: 02140110.
This stream was visited in the spring on 3/8/1995 and again in the summer on 5/31/1995.

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 401 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0.3 %
Agricultural Land Use 2.7 %
Forested Land Use 86.7 %


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

Physical Stream Habitat
Instream Habitat 6/20 (Marginal)
Epifaunal Substrate 4/20 (Poor)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		6/20 (Marginal)
Riffle Quality 8/20 (Marginal)
Shading 95 %
Embeddedness 80 %
The embeddedness, a measure of silt on the stream bottom, was 80%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 14.5 ° C
Dissolved oxygen (DO) 7.91 mg/L
pH (lab) 5.9
Conductivity 44 µmho/cm
Alkalinity
(acid neutralizing capacity) 		107.5 µeq/L
Dissolved organic carbon (DOC) 7 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 67
Blacknose Dace 26
Least Brook Lamprey 19
Bluegill 2
Chain Pickerel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Cricket Frog
Northern Green Frog
Northern Red Salamander
Northern Two-Lined Salamander
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Stegopterna Black Fly 55
Parametriocnemus Non-Biting Midges 30
Zavrelimyia Non-Biting Midges 4
Krenopelopia Non-Biting Midge 4
Hydropsyche Net-Spinning Caddisfly 3
Pseudolimnophila Crane Fly 3
Paraleptophlebia Blue Quill Mayfly 2
Cladotanytarsus Non-Biting Midge 2
Polycentropus Tube Maker Caddisfly 1
Neophylax Caddisfly 1
Hexatoma Crane Fly 1
Nigronia Megaloptera (Dark Fishfly) 1
Micrasema 1
Leuctra  Rolled-Winged Stonefly 1
Prosimulium Black Fly 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.