MBSS Site Summary for: GWYN-204-A-2012

Site Photos

Field photo showing stream conditions at site GWYN-204-A-2012-1 (Opens in a new window) Field photo showing stream conditions at site GWYN-204-A-2012-2 (Opens in a new window)

Located on RED RUN in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 3/7/2012 and again in the summer on 6/27/2012.

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 Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 3,515 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 38 %
Agricultural Land Use 13.1 %
Forested Land Use 44.7 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 7.75
Alkalinity
(acid neutralizing capacity) 		1096.6 µeq/L
Dissolved organic carbon (DOC) 0.7741 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 16 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Tessellated Darter 270
Swallowtail Shiner 264
White Sucker 153
Rosyside Dace 110
Creek Chub 108
Blacknose Dace 105
Green Sunfish 66
Central Stoneroller 62
Common Shiner 61
Longnose Dace 53
Redbreast Sunfish 49
Cutlip Minnow 24
Northern Hogsucker 21
Fathead Minnow 18
Margined Madtom 5
Bluegill 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Northern Ringneck Snake
Northern Two-Lined Salamander
Northern Water Snake
Pickerel Frog

Crayfish:
Orconectes virilis

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

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 28
Diamesa Bloodworm 13
Orthocladius Non-Biting Midges 13
Cricotopus Non-Biting Midges 7
Rheocricotopus Non-Biting Midges 7
Hydropsyche Net-Spinning Caddisfly 4
TUBIFICIDAE Aquatic Worm 3
Rheotanytarsus Non-Biting Midges 3
Corynoneura Non-Biting Midges 3
Eukiefferiella Non-Biting Midges 2
Dubiraphia Riffle Beetle 2
Ablabesmyia Non-Biting Midge 2
Orthocladiinae Midge 2
Argia Narrow-Winged Damselfly 2
Cheumatopsyche Net-Spinning Caddisfly 2
Procladius Non-Biting Midge 1
Brillia Non-Biting Midges 1
Helichus Beetle 1
Stenelmis Beetle 1
Probezzia Biting Midges 1
Prosimulium Black Fly 1
Hagenius Clubtail Dragonfly 1
Chimarra Fingernet Caddisfly 1
Ptilostomis Giant Casemaker Caddisfly 1
Acroneuria Golden Stoneflies 1
Thienemanniella Non-Biting Midges 1
Thienemannimyia Group Non-Biting Midges 1
Microtendipes Non-Biting Midges 1
Paratanytarsus Non-Biting Midges 1
Stagnicola Air Breathing Freshwater Snail 1
Dicrotendipes 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.