MBSS Site Summary for: STMA-108-R-2000

Site Photos

Field photo showing stream conditions at site STMA-108-R-2000-01 (Opens in a new window) Field photo showing stream conditions at site STMA-108-R-2000-02 (Opens in a new window)

Located on ST MARY'S RIVER UT4 in the St. Mary's River watershed, 8-digit code: 02140103.
This stream was visited in the spring on 3/2/2000 and again in the summer on 6/13/2000.

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 - 1.0 / 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 370 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 5.6 %
Forested Land Use 94.4 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 60 meters 		17/20 (Optimal)
Riffle Quality
Riffle Extent = 20 meters 		12/20 (Suboptimal)
Shading 85 %
Embeddedness 30 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 19.4 ° C
Dissolved oxygen (DO) 9.4 mg/L
pH (lab) 4.95
Conductivity 40 µmho/cm
Alkalinity
(acid neutralizing capacity) 		-7.6 µeq/L
Dissolved organic carbon (DOC) 2.3 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 50
American Eel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Red 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
Stegopterna Black Fly 74
Prosimulium Black Fly 24
Leuctra  Rolled-Winged Stonefly 7
Naididae Aquatic Worm 3
Simulium Black Fly 3
Rhyacophila Free-Living Caddisfly 3
Caecidotea Isopod 2
Tubificidae Aquatic Worm 2
Nemouridae Nemourid Stonefly 1
Leptophlebia Pronggilled Mayfly 1
Allocapnia Small Winter Stonefly 1
Amphinemura Spring Stonefly 1
Polycentropodidae Trupetnet And Tubemaking Caddisfly 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.