MBSS Site Summary for: STMA-119-R-2003

Site Photos

Field photo showing stream conditions at site STMA-119-R-2003-1 (Opens in a new window) Field photo showing stream conditions at site STMA-119-R-2003-2 (Opens in a new window)

Located on BROOM CR in the St. Mary's River watershed, 8-digit code: 02140103.
This stream was visited in the spring on 3/12/2003 and again in the summer on 6/10/2003.

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 Poor - 2.3 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 57 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 1 %
Agricultural Land Use 40 %
Forested Land Use 55 %


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 8/20 (Marginal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 58 meters 		9/20 (Marginal)
Riffle Quality
Riffle Extent = 17 meters 		11/20 (Suboptimal)
Shading 96 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 16.5 ° C
Dissolved oxygen (DO) 7.8 mg/L
pH (lab) 6.35
Conductivity 97 µmho/cm
Alkalinity
(acid neutralizing capacity) 		135.1 µeq/L
Dissolved organic carbon (DOC) 2.7 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 34
American Eel 21
Brown Bullhead 14
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog
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
Synurella Amphipod 26
Zavrelimyia Non-Biting Midges 17
Microtendipes Non-Biting Midges 8
Conchapelopia Non-Biting Midges 7
Parametriocnemus Non-Biting Midges 7
Stegopterna Black Fly 6
Polypedilum Non-Biting Midges 3
Leptophlebiidae Pronggilled Mayfly 3
Polycentropus Tube Maker Caddisfly 3
Pisidiidae Pill Clam 2
Anchytarsus Beetle 2
Leuctra  Rolled-Winged Stonefly 2
Micropsectra Non-Biting Midges 2
Chrysops Deerfly 2
Heterotrissocladius European Non-Biting Midge 2
Apsectrotanypus Non-Biting Midges 2
Molannodes 1
Scirtidae Marsh Beetle 1
Natarsia Non-Biting Midges 1
Sialis Alderfly 1
Heteroplectron Caddisfly 1
Gomphidae Clubtail Dragonfly 1
Tipula Crane Fly 1
Thienemanniella Non-Biting Midges 1
Dubiraphia Riffle Beetle 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.