MBSS Site Summary for: CORS-102-S-2011

Site Photos

Field photo showing stream conditions at site CORS-102-S-2011-1 (Opens in a new window) Field photo showing stream conditions at site CORS-102-S-2011-2 (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 3/23/2011 and again in the summer on 6/2/2011.

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 - 2.0 / 5.0
Benthic IBI Fair - 3.3 / 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 9/20 (Marginal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 74 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 75 %
Embeddedness 20 %


Stream Water Quality:
pH (lab) 6.44
Alkalinity
(acid neutralizing capacity) 		170.5 µeq/L
Dissolved organic carbon (DOC) 20.4538 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 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 11
Green Sunfish 6
Bluegill 5
Redfin Pickerel 5
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 35
Parametriocnemus Non-Biting Midges 31
Stegopterna Black Fly 11
NEMOURIDAE Nemourid Stonefly 11
Hydrobaenus Midge 8
Eukiefferiella Non-Biting Midges 5
Orthocladius Non-Biting Midges 5
Rheocricotopus Non-Biting Midges 1
LIMNEPHILIDAE Northern Casemaker Caddisfly 1
LEPTOPHLEBIIDAE Pronggilled Mayfly 1
Amphinemura Spring Stonefly 1
LUMBRICULIDAE Worm 1
Parachaetocladius Non-Biting Midge 1
Perlesta 1
NAIDIDAE Aquatic Worm 1
Erioptera Cranefly 1
Chrysops Deerfly 1
Musculium Fingernail Clam 1
Wormaldia Fingernet Caddisfly 1
Rhyacophila Free-Living 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.