MBSS Site Summary for: SEVE-106-R-2017

Site Photos

Field photo showing stream conditions at site SEVE-106-R-2017-MidpointFacingDownstream (Opens in a new window) Field photo showing stream conditions at site SEVE-106-R-2017-MidpointFacingUpstream (Opens in a new window)

Located on UT Severn Run in the Severn River watershed, 8-digit code: 02131002.
This stream was visited in the spring on 3/7/2017 and again in the summer on 6/6/2017.

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 - 2.0 / 5.0
Benthic IBI Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 669 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 50.3 %
Agricultural Land Use 0.2 %
Forested Land Use 48.6 %


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

Physical Stream Habitat
Instream Habitat 7/20 (Marginal)
Epifaunal Substrate 4/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 48 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 27 meters 		7/20 (Marginal)
Shading 80 %
Embeddedness 40 %


Stream Water Quality:
pH (lab) 7.31
Alkalinity
(acid neutralizing capacity) 		535.4 µeq/L
Dissolved organic carbon (DOC) 8.3352 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 54
Eastern Mudminnow 9
Tessellated Darter 6
American Eel 2
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Ratsnake
Gray Treefrog
Northern Green Frog
Northern Water Snake

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
ACERPENNA Tiny Blue-Winged Olive Mayflies 37
STENELMIS Beetle 36
CHEUMATOPSYCHE Net-Spinning Caddisfly 6
OPTIOSERVUS Riffle Beetle 6
TAENIOPTERYX Winter Stonefly 5
PARAMETRIOCNEMUS Non-Biting Midges 5
CHIMARRA Fingernet Caddisfly 4
SIMULIUM Black Fly 4
ORTHOCLADIUS Non-Biting Midges 4
TUBIFICIDAE Aquatic Worm 1
BOYERIA Spotted Darner Dragonfly 1
ANTOCHA Crane Fly 1
TIPULA Crane Fly 1
MACCAFFERTIUM March Brown And Cahill Mayfly 1
ORTHOCLADIINAE Midge 1
HYDROPSYCHE Net-Spinning Caddisfly 1
CORYNONEURA Non-Biting Midges 1
PARATANYTARSUS Non-Biting Midges 1
RHEOTANYTARSUS Non-Biting Midges 1
THIENEMANNIELLA Non-Biting Midges 1
THIENEMANNIMYIA GROUP Non-Biting Midges 1
ZAVRELIMYIA Non-Biting Midges 1
LIMNEPHILIDAE Northern Casemaker Caddisfly 1
MACRONYCHUS Riffle Beetle 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.