MBSS Site Summary for: SM-S-111-112-95


Located on JARBOESVILLE RUN in the St. Mary's River watershed, 8-digit code: 02140103.
This stream was visited in the spring on 3/21/1995 and again in the summer on 6/5/1995.

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 - 4.3 / 5.0
Benthic IBI Good - 4.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,026 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 15.8 %
Agricultural Land Use 22.8 %
Forested Land Use 61.1 %


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 13/20 (Suboptimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		16/20 (Optimal)
Riffle Quality 15/20 (Suboptimal)
Shading 85 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 20.5 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 6.51
Conductivity 80 µmho/cm
Alkalinity
(acid neutralizing capacity) 		182.6 µeq/L
Dissolved organic carbon (DOC) 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 12 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Tessellated Darter 31
Least Brook Lamprey 24
Redbreast Sunfish 22
Margined Madtom 21
American Eel 20
Chain Pickerel 17
Eastern Mudminnow 13
Tadpole Madtom 6
Creek Chubsucker 3
Pirate Perch 3
Swallowtail Shiner 3
Sea Lamprey 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Fowler's Toad
Northern Green Frog
Northern Ring-Necked Snake
Southern Leopard 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
Physa Air-Breathing Freshwater Snail 19
Acerpenna Tiny Blue-Winged Olive Mayflies 14
Perlesta 9
Cheumatopsyche Net-Spinning Caddisfly 8
Rheotanytarsus Non-Biting Midges 7
Dubiraphia Riffle Beetle 7
Labrundinia Non-Biting Midges 5
Tvetenia Non-Biting Midges 5
Isoperla Stripetail Stonefly 5
Macronychus Riffle Beetle 3
Eukiefferiella Non-Biting Midges 3
Pisidium Freshwater Pea (Pill) Clam 3
Nectopsyche 3
Thienemannimyia Non-Biting Midges 2
Rheocricotopus Non-Biting Midges 2
Limnephilidae Northern Casemaker Caddisfly 1
Parametriocnemus Non-Biting Midges 1
Optioservus Riffle Beetle 1
Ancyronyx Spider Riffle Beetle 1
Helisoma 1
Stegopterna Black Fly 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.