MBSS Site Summary for: MANO-119-R-2017

Site Photos

Field photo showing stream conditions at site MANO-119-R-2017-MidpointLookingDownstream (Opens in a new window) Field photo showing stream conditions at site MANO-119-R-2017-MidpointLookingUpstream (Opens in a new window)

Located on Lorretto Branch in the Manokin River watershed, 8-digit code: 02130208.
This stream was visited in the spring on 4/10/2017 and again in the summer on 7/10/2017.

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 Good - 4.0 / 5.0
Benthic IBI Poor - 1.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 615 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 1.6 %
Agricultural Land Use 31.1 %
Forested Land Use 42.7 %


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

Physical Stream Habitat
Instream Habitat 8/20 (Marginal)
Epifaunal Substrate 2/20 (Poor)
Velocity/Depth Diversity 1/20 (Poor)
Pool Quality
Pool Extent = 55 meters 		2/20 (Poor)
Riffle Quality
Riffle Extent = 20 meters 		8/20 (Marginal)
Shading 40 %
Embeddedness 80 %
The embeddedness, a measure of silt on the stream bottom, was 80%. This is relatively high, and may exclude some biota.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
pH (lab) 6.1
Alkalinity
(acid neutralizing capacity) 		192.9 µeq/L
Dissolved organic carbon (DOC) 6.307 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 6 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 47
Creek Chubsucker 23
Swamp Darter 6
American Eel 4
Pirate Perch 4
Bluespotted Sunfish 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog
Northern Water Snake
Southern Leopard Frog

Crayfish:
Procambarus sp.

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

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
ORTHOCLADIUS Non-Biting Midges 78
SIMULIUM Black Fly 10
ORTHOCLADIINAE Midge 6
PARAKIEFFERIELLA European Non-Biting Midge 5
THIENEMANNIELLA Non-Biting Midges 4
SYNURELLA Amphipod 3
TUBIFICIDAE Aquatic Worm 2
RHEOCRICOTOPUS Non-Biting Midges 2
TANYPODINAE Non-Biting Midges 1
THIENEMANNIMYIA GROUP Non-Biting Midges 1
GOMPHUS Clubtail Dragonfly 1
POLYPEDILUM 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.