MBSS Site Summary for: STMA-113-R-2000

Site Photos

Field photo showing stream conditions at site STMA-113-R-2000-01 (Opens in a new window) Field photo showing stream conditions at site STMA-113-R-2000-02 (Opens in a new window) Field photo showing stream conditions at site STMA-113-R-2000-03 (Opens in a new window)

Located on ST MARY'S RIVER UT3 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 6/5/2000.

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 Good - 5.0 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 665 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 10.6 %
Agricultural Land Use 23.5 %
Forested Land Use 66 %


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 11/20 (Suboptimal)
Pool Quality
Pool Extent = 70 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 15 meters 		6/20 (Marginal)
Shading 70 %
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 18.5 ° C
Dissolved oxygen (DO) 9.5 mg/L
pH (lab) 6.15
Conductivity 70 µmho/cm
Alkalinity
(acid neutralizing capacity) 		99.8 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 7 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
American Eel 174
Least Brook Lamprey 145
Eastern Mudminnow 95
Creek Chubsucker 71
Pumpkinseed 15
Golden Shiner 12
Brown Bullhead 10
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern Box Turtle
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Tubificidae Aquatic Worm 23
Conchapelopia Non-Biting Midges 9
Prosimulium Black Fly 8
Zavrelimyia Non-Biting Midges 8
Stegopterna Black Fly 7
Synurella Amphipod 6
Naididae Aquatic Worm 6
Diplocladius Non-Biting Midges 5
Leptophlebia Pronggilled Mayfly 5
Leptophlebiidae Pronggilled Mayfly 3
Parametriocnemus Non-Biting Midges 3
Eukiefferiella Non-Biting Midges 3
Chloroperlidae Green Stonefly 3
Perlidae Common Stonefly 2
Procladius Non-Biting Midge 2
Thienemanniella Non-Biting Midges 2
Sialis Alderfly 1
Pisidiidae Pill Clam 1
Brillia Non-Biting Midges 1
Tanypodinae Non-Biting Midges 1
Collembola Springtail 1
Hydroporus Water Beetle 1
Hexatoma Crane Fly 1
Pseudolimnophila Crane Fly 1
Prostoma Freshwater Nemertean (Ribbon Worm) 1
Probezzia Biting Midges 1
Eurylophella Mayfly 1
Cricotopus/Orthocladius Midge 1
Gomphus Clubtail Dragonfly 1
Micropsectra Non-Biting Midges 1
Microtendipes 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.