MBSS Site Summary for: STMA-106-R-2017

Site Photos

Field photo showing stream conditions at site STMA-106-R-2017-MidpointDownstream (Opens in a new window) Field photo showing stream conditions at site STMA-106-R-2017-MidpointUpstream (Opens in a new window)

Located on UT JARBOESVILLE RUN in the St. Mary's River watershed, 8-digit code: 02140103.
This stream was visited in the spring on 3/8/2017 and again in the summer on 6/14/2017.

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 - 3.3 / 5.0
Benthic IBI Poor - 2.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 724 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 37.7 %
Agricultural Land Use 1.7 %
Forested Land Use 56.4 %


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

Physical Stream Habitat
Instream Habitat 8/20 (Marginal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 56 meters 		7/20 (Marginal)
Riffle Quality
Riffle Extent = 20 meters 		6/20 (Marginal)
Shading 50 %
Embeddedness 90 %
The embeddedness, a measure of silt on the stream bottom, was 90%. This is relatively high, and may exclude some biota.


Stream Water Quality:
pH (lab) 5.93
Alkalinity
(acid neutralizing capacity) 		139.9 µeq/L
Dissolved organic carbon (DOC) 1.758 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 9 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 218
Tessellated Darter 64
Pirate Perch 6
Creek Chubsucker 4
Bluespotted Sunfish 3
Least Brook Lamprey 2
American Eel 1
Blacknose Dace 1
Redbreast Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Cope's Gray Treefrog
Eastern Box Turtle
Eastern Cricket Frog
Northern Black Racer
Northern Two-Lined Salamander
Northern Water Snake
Southern Leopard Frog

Crayfish:
Cambarus diogenes
Orconectes limosus

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
ORTHOCLADIUS Non-Biting Midges 53
POLYPEDILUM Non-Biting Midges 9
SIMULIUM Black Fly 8
ORTHOCLADIINAE Midge 7
DIPLOCLADIUS Non-Biting Midges 6
CORYNONEURA Non-Biting Midges 4
CHEUMATOPSYCHE Net-Spinning Caddisfly 4
THIENEMANNIMYIA GROUP Non-Biting Midges 4
STEGOPTERNA Black Fly 3
CAECIDOTEA Isopod 3
ABLABESMYIA Non-Biting Midge 3
PROCLADIUS Non-Biting Midge 2
CHAETOCLADIUS Non-Biting Midges 2
ORCONECTES 2
LUMBRICULIDAE Worm 2
LIMNEPHILIDAE Northern Casemaker Caddisfly 1
DUBIRAPHIA Riffle Beetle 1
POTTHASTIA Non-Biting Midges 1
TANYPODINAE Non-Biting Midges 1
CNEPHIA Black Fly 1
HYDROPSYCHE Net-Spinning Caddisfly 1
NEMATODA Nematode 1
DIAMESINAE Non-Biting Midges 1
NANOCLADIUS Non-Biting Midges 1
PARAMETRIOCNEMUS 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.