MBSS Site Summary for: GWYN-102-R-2004

Site Photos

Field photo showing stream conditions at site GWYN-102-R-2004-111 (Opens in a new window) Field photo showing stream conditions at site GWYN-102-R-2004-112 (Opens in a new window)

Located on RED RUN UT 2 in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 3/17/2004 and again in the summer on 6/16/2004.

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 - 2.7 / 5.0
Benthic IBI Good - 5.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 170 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 7 %
Agricultural Land Use 16 %
Forested Land Use 64 %


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

Physical Stream Habitat
Instream Habitat 15/20 (Suboptimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 47 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 28 meters 		7/20 (Marginal)
Shading 80 %
Embeddedness 10 %


Stream Water Quality:
Water temperature 23.3 ° C
Dissolved oxygen (DO) 9.3 mg/L
pH (lab) 7.9
Conductivity 257 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1269 µeq/L
Dissolved organic carbon (DOC) 2.9 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Rosyside Dace 107
Blacknose Dace 89
Creek Chub 41
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander
Northern Two-Lined Salamander
Pickerel Frog
Wood Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 27
Cheumatopsyche Net-Spinning Caddisfly 14
Amphinemura Spring Stonefly 12
Chimarra Fingernet Caddisfly 8
Neophylax Caddisfly 7
Parametriocnemus Non-Biting Midges 6
Diplectrona Net-Spinning Caddisfly 5
Hydropsyche Net-Spinning Caddisfly 4
Gomphidae Clubtail Dragonfly 3
Antocha Crane Fly 3
Thienemannimyia group Non-Biting Midges 3
Macronychus Riffle Beetle 3
Leuctridae Rolledwinged Stonefly 3
Ephemerellidae Spiny Crawler Mayfly 3
Eccoptura Yellow Stone Stonefly 2
Tvetenia Non-Biting Midges 2
Stegopterna Black Fly 2
Stenelmis Beetle 2
Dolophilodes Medium Evening Sedge Caddisfly 2
Acroneuria Golden Stoneflies 1
Eukiefferiella Non-Biting Midges 1
Micropsectra Non-Biting Midges 1
Diamesa Bloodworm 1
Platysmittia 1
Podonominae 1
Chelifera Aquatic Dance Fly 1
Chrysops Deerfly 1
Hydropsychidae Common Netspinner Caddisfly 1
Leptophlebiidae Pronggilled Mayfly 1
Tanypodinae Non-Biting Midges 1
Baetidae Small Minnow Mayfly 1
Acerpenna Tiny Blue-Winged Olive Mayflies 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.