MBSS Site Summary for: SEVE-302-X-2017


Located on Severn Run in the Severn River watershed, 8-digit code: 02131002.
This stream was visited in the spring on 4/17/2017 and again in the summer on 9/5/2017.

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 Fair - 3.7 / 5.0
Benthic IBI Good - 4.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 15,244 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 52.5 %
Agricultural Land Use 4.8 %
Forested Land Use 41.6 %


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

Physical Stream Habitat
Instream Habitat 11/20 (Suboptimal)
Epifaunal Substrate 6/20 (Marginal)
Velocity/Depth Diversity 17/20 (Optimal)
Pool Quality
Pool Extent = 47 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 37 meters 		16/20 (Optimal)
Shading 70 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.


Stream Water Quality:
No water quality measurements available for this site.

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 10 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Spottail Shiner 57
American Eel 53
Tessellated Darter 40
Eastern Mosquitofish 23
Swallowtail Shiner 21
Blacknose Dace 20
White Sucker 4
Bluegill 2
Eastern Mudminnow 2
Notropis Sp. 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog

Crayfish:
Orconectes limosus

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
Oriental Bittersweet
Phragmites
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
CHEUMATOPSYCHE Net-Spinning Caddisfly 24
CRANGONYX Amphipod 13
RHEOTANYTARSUS Non-Biting Midges 12
CRANGONYCTIDAE Scud 10
POLYPEDILUM Non-Biting Midges 9
PERLIDAE Common Stonefly 7
RHEOCRICOTOPUS Non-Biting Midges 5
POLYCENTROPUS Tube Maker Caddisfly 5
TAENIOPTERYX Winter Stonefly 3
TVETENIA Non-Biting Midges 3
LEPTOCERIDAE Longhorned Casemaker Caddisfly 3
MACCAFFERTIUM March Brown And Cahill Mayfly 3
ORTHOCLADIINAE Midge 3
CORYNONEURA Non-Biting Midges 2
ORTHOCLADIUS Non-Biting Midges 2
TANYTARSUS Non-Biting Midges 2
LEUCTRIDAE Rolledwinged Stonefly 2
NEOPLASTA 1
ANAFROPTILUM Small Minnow Mayfly 1
THIENEMANNIMYIA GROUP Non-Biting Midges 1
MICROCYLLOEPUS Riffle Beetle 1
BRILLIA Non-Biting Midges 1
TANYTARSINI Non-Biting Midges 1
SYNURELLA Amphipod 1
TIPULIDAE Cranefly 1
LEPIDOSTOMA Little Brown Sedge Caddisfly 1
OECETIS Long-Horned Caddisfly 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.