MBSS Site Summary for: SEVE-301-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 - 3.3 / 5.0
Benthic IBI Good - 4.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 15,325 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 52.6 %
Agricultural Land Use 4.7 %
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 14/20 (Suboptimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 17/20 (Optimal)
Pool Quality
Pool Extent = 27 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 65 meters 		16/20 (Optimal)
Shading 92 %
Embeddedness 95 %
The embeddedness, a measure of silt on the stream bottom, was 95%. 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 56
Tessellated Darter 37
American Eel 30
Swallowtail Shiner 29
Eastern Mosquitofish 15
White Sucker 9
Blacknose Dace 6
Striped Bass 2
Bluegill 1
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Pickerel Frog

Crayfish:
Orconectes limosus

Exotic Plants:
English Ivy
Garlic Mustard
Japanese Barberry
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
Oriental Bittersweet
Tree Of Heaven
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
CRANGONYX Amphipod 62
POLYCENTROPUS Tube Maker Caddisfly 9
CHEUMATOPSYCHE Net-Spinning Caddisfly 6
ABLABESMYIA Non-Biting Midge 5
CALOPTERYX Damselfly 5
TANYTARSUS Non-Biting Midges 4
RHEOTANYTARSUS Non-Biting Midges 4
POLYPEDILUM Non-Biting Midges 3
TUBIFICIDAE Aquatic Worm 2
STENELMIS Beetle 1
PROBEZZIA Biting Midges 1
GOMPHIDAE Clubtail Dragonfly 1
HAGENIUS Clubtail Dragonfly 1
EUKIEFFERIELLA Non-Biting Midges 1
LABRUNDINIA Non-Biting Midges 1
MICROPSECTRA Non-Biting Midges 1
NANOCLADIUS Non-Biting Midges 1
PARAMETRIOCNEMUS Non-Biting Midges 1
RHEOCRICOTOPUS Non-Biting Midges 1
PARAKIEFFERIELLA European Non-Biting Midge 1
LEPTOCERIDAE Longhorned Casemaker Caddisfly 1
TVETENIA Non-Biting Midges 1
DUBIRAPHIA Riffle Beetle 1
MACRONYCHUS Riffle Beetle 1
BAETIDAE Small Minnow Mayfly 1
ANCYRONYX Spider Riffle Beetle 1
TANYPODINAE Non-Biting Midges 1
TAENIOPTERYX Winter Stonefly 1
LUMBRICULIDAE Worm 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.