MBSS Site Summary for: STMA-208-R-2003

Site Photos

Field photo showing stream conditions at site STMA-208-R-2003-1 (Opens in a new window) Field photo showing stream conditions at site STMA-208-R-2003-2 (Opens in a new window)

Located on JOHNS 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 6/11/2003.

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 Good - 4.0 / 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 1,632 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 7 %
Agricultural Land Use 42 %
Forested Land Use 47 %


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 13/20 (Suboptimal)
Pool Quality
Pool Extent = 60 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 21 meters 		15/20 (Suboptimal)
Shading 93 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 17.7 ° C
Dissolved oxygen (DO) 7.7 mg/L
pH (lab) 6.18
Conductivity 87 µmho/cm
Alkalinity
(acid neutralizing capacity) 		62.9 µeq/L
Dissolved organic carbon (DOC) 4.2 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 14 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Redbreast Sunfish 32
Tessellated Darter 22
American Eel 19
Eastern Mudminnow 19
Pumpkinseed 12
Blacknose Dace 8
Least Brook Lamprey 6
Bluegill 5
Margined Madtom 5
Tadpole Madtom 4
Chain Pickerel 2
Golden Shiner 2
Creek Chubsucker 1
Pirate Perch 1
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:
Japanese Honeysuckle
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Oulimnius Riffle Beetle 30
Prosimulium Black Fly 21
Synurella Amphipod 8
Acerpenna Tiny Blue-Winged Olive Mayflies 7
Elmidae Riffle Beetle 5
Eccoptura Yellow Stone Stonefly 5
Chloroperlidae Green Stonefly 5
Microtendipes Non-Biting Midges 4
Micropsectra Non-Biting Midges 3
Caecidotea Isopod 3
Eurylophella Mayfly 3
Diplectrona Net-Spinning Caddisfly 2
Parachaetocladius Non-Biting Midge 2
Gomphidae Clubtail Dragonfly 2
Parametriocnemus Non-Biting Midges 2
Dubiraphia Riffle Beetle 2
Polycentropus Tube Maker Caddisfly 2
Tanypodinae Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Limnephilidae Northern Casemaker Caddisfly 1
Pisidiidae Pill Clam 1
Hexatoma Crane Fly 1
Chimarra Fingernet Caddisfly 1
Eukiefferiella Non-Biting Midges 1
Neophylax Caddisfly 1
Nyctiophylax 1
Physa Air-Breathing Freshwater Snail 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.