MBSS Site Summary for: SEVE-106-R-2003

Site Photos

Field photo showing stream conditions at site SEVE-106-R-2003-0830 (Opens in a new window) Field photo showing stream conditions at site SEVE-106-R-2003-0831 (Opens in a new window)

Located on SEVERN RUN UT4 in the Severn River watershed, 8-digit code: 02131002.
This stream was visited in the spring on 3/11/2003 and again in the summer on 7/28/2003.

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 Fair - 3.0 / 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 669 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 30 %
Agricultural Land Use 6 %
Forested Land Use 61 %


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

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 59 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 20 meters 		11/20 (Suboptimal)
Shading 95 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 21.6 ° C
Dissolved oxygen (DO) 7.3 mg/L
pH (lab) 6.08
Conductivity 209 µmho/cm
Alkalinity
(acid neutralizing capacity) 		89.6 µeq/L
Dissolved organic carbon (DOC) 7.6 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 7 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Bluegill 14
Blacknose Dace 9
Eastern Mudminnow 9
Pumpkinseed 6
Yellow Perch 6
Tessellated Darter 4
Chain Pickerel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Stegopterna Black Fly 89
Enchytraeidae Aquatic Worm 4
Zavrelimyia Non-Biting Midges 4
Limnephilidae Northern Casemaker Caddisfly 3
Nemouridae Nemourid Stonefly 2
Caecidotea Isopod 2
Tipula Crane Fly 2
Diptera True Fly 2
Ceratopogon Biting Midge 2
Lumbriculidae Worm 2
Hydroporus Water Beetle 1
Tipulidae Cranefly 1
Heterotrissocladius European Non-Biting Midge 1
Ptilostomis Giant Casemaker Caddisfly 1
Tortricidae Leafroller Moth 1
Coenagrionidae Narrowwinged Damselfly 1
Tubificidae Aquatic Worm 1
Helichus Beetle 1
Chaetocladius Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Pisidiidae Pill Clam 1
Cordulegaster Spiketail Dragonfly 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.