MBSS Site Summary for: GWYN-103-R-2007

Site Photos

Located on Red Run UT3 in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 4/17/2007 and again in the summer on 6/11/2007.

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 Fair - 3.0 / 5.0
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 670 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 10.1 %
Agricultural Land Use 27.7 %
Forested Land Use 52.1 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 12/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 57 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 18 meters 		11/20 (Suboptimal)
Shading 90 %
Embeddedness 20 %


Stream Water Quality:
Water temperature 15.7 ° C
Dissolved oxygen (DO) 8.5 mg/L
pH (lab) 7.52
Conductivity 224 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1023.6 µeq/L
Dissolved organic carbon (DOC) 3.721 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
Blacknose Dace 237
Rosyside Dace 87
Creek Chub 78
Tessellated Darter 28
Longnose Dace 9
Central Stoneroller 6
Redbreast Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Eastern Red-Backed Salamander
Long-Tailed Salamander
Northern Green Frog
Northern Red Salamander
Northern Two-Lined Salamander
Northern Watersnake
Pickerel Frog
Wood Frog

Crayfish:
Orconectes virilis

Exotic Plants:
Garlic Mustard
Japanese Barberry
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
Privet
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 21
Polypedilum Non-Biting Midges 13
Parametriocnemus Non-Biting Midges 8
Simuliidae Black Fly 7
Leuctridae Rolledwinged Stonefly 5
Rheosmittia Non-Biting Midges 5
Ephemerella Sulphur Mayfly 5
Ephemerellidae Spiny Crawler Mayfly 4
Simulium Black Fly 4
Perlidae Common Stonefly 4
Acroneuria Golden Stoneflies 3
Orthocladius Non-Biting Midges 3
Hydropsyche Net-Spinning Caddisfly 3
Helichus Beetle 2
Cheumatopsyche Net-Spinning Caddisfly 2
Rheocricotopus Non-Biting Midges 2
Boyeria Spotted Darner Dragonfly 1
Tanypodinae Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Elmidae Riffle Beetle 1
Oulimnius Riffle Beetle 1
Diamesa Bloodworm 1
Nanocladius Non-Biting Midges 1
Glossosoma Little Black Caddisfly 1
Nigronia Megaloptera (Dark Fishfly) 1
Stilocladius Midge 1
Antocha Crane Fly 1
Tipula Crane Fly 1
Heptageniidae Flathead Mayfly 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.