MBSS Site Summary for: CORS-102-S-2013

Site Photos

Field photo showing stream conditions at site CORS-102-S-2013-MidpointPdownstream (Opens in a new window) Field photo showing stream conditions at site CORS-102-S-2013-MidpointPupstream (Opens in a new window)

Located on EMORY CREEK UT in the Corsica River watershed, 8-digit code: 02130507.
This stream was visited in the spring on 3/12/2013 and again in the summer on 7/16/2013.

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 - 2.3 / 5.0
Benthic IBI Poor - 2.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 639 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 14.2 %
Forested Land Use 83.8 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 68 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 9 meters 		8/20 (Marginal)
Shading 55 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.


Stream Water Quality:
pH (lab) 6.16
Alkalinity
(acid neutralizing capacity) 		105.4 µeq/L
Dissolved organic carbon (DOC) 17.441 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 265
American Eel 14
Eastern Mosquitofish 7
Largemouth Bass 7
Black Crappie 1
Redfin Pickerel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog
Northern Spring Peeper
Pickerel Frog
Southern Leopard Frog
Wood Frog

Crayfish:
Cambarus diogenes
Procambarus clarkii

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 40
Stegopterna Black Fly 37
Hydrobaenus Midge 17
TUBIFICIDAE Aquatic Worm 8
Eukiefferiella Non-Biting Midges 3
NEMOURIDAE Nemourid Stonefly 2
Corynoneura Non-Biting Midges 1
Cryptochironomus Non-Biting Midges 1
TIPULIDAE Cranefly 1
Sphaerium Fingernail Clam 1
Rhyacophila Free-Living Caddisfly 1
Microtendipes Non-Biting Midges 1
Ironoquia Northern Caddisfly 1
PERLODIDAE Perlodid Stonefly 1
LUMBRICULIDAE Worm 1
Pilaria 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.