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

Site Photos

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

Located on MAPLE RUN in the St. Mary's River watershed, 8-digit code: 02140103.
This stream was visited in the spring on 3/1/2000 and again in the summer on 8/23/2000.

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 Poor - 2.3 / 5.0
Benthic IBI Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 569 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0.2 %
Agricultural Land Use 11.9 %
Forested Land Use 87.9 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 8/20 (Marginal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 74 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 3 meters 		6/20 (Marginal)
Shading 85 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 20.3 ° C
Dissolved oxygen (DO) 7.2 mg/L
pH (lab) 5.69
Conductivity 40 µmho/cm
Alkalinity
(acid neutralizing capacity) 		28 µeq/L
Dissolved organic carbon (DOC) 3.5 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 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Bluegill 22
Tadpole Madtom 4
Eastern Mudminnow 3
Largemouth Bass 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green 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
Simulium Black Fly 28
Stegopterna Black Fly 28
Leptophlebia Pronggilled Mayfly 9
Zavrelimyia Non-Biting Midges 7
Unniella Non-Biting Midge 6
Conchapelopia Non-Biting Midges 4
Orthocladiinae Midge 4
Tanypodinae Non-Biting Midges 3
Polypedilum Non-Biting Midges 3
Naididae Aquatic Worm 3
Dicrotendipes Non-Biting Midges 2
Diplocladius Non-Biting Midges 2
Rheocricotopus Non-Biting Midges 2
Caecidotea Isopod 2
Microtendipes Non-Biting Midges 2
Nanocladius Non-Biting Midges 2
Paratanytarsus Non-Biting Midges 1
Synurella Amphipod 1
Eukiefferiella Non-Biting Midges 1
Tubificidae Aquatic Worm 1
Chrysops Deerfly 1
Allocapnia Small Winter Stonefly 1
Hydroporus Water 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.