MBSS Site Summary for: CORS-102-S-2012

Site Photos

Field photo showing stream conditions at site CORS-102-S-2012-MidpointPdownstream (Opens in a new window) Field photo showing stream conditions at site CORS-102-S-2012-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 3/14/2012 and again in the summer on 6/18/2012.

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 Fair - 3.6 / 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 15/20 (Suboptimal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 68 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 21 meters 		6/20 (Marginal)
Shading 75 %
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:
pH (lab) 6.66
Alkalinity
(acid neutralizing capacity) 		295.4 µeq/L
Dissolved organic carbon (DOC) 17.2066 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 40
Green Sunfish 10
Pumpkinseed 3
American Eel 2
Redfin Pickerel 2
Golden Shiner 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Fowler's Toad
Northern Green Frog
Northern Spring Peeper
Southern Leopard Frog
Wood Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 49
Stegopterna Black Fly 24
NEMOURIDAE Nemourid Stonefly 9
Hydrobaenus Midge 8
Thienemanniella Non-Biting Midges 6
Rheocricotopus Non-Biting Midges 4
Phaenopsectra Non-Biting Midges 2
CAPNIIDAE Small Winter Stonefly 2
Ostrocerca Stonefly 2
Diplocladius Non-Biting Midges 2
Orthocladius Non-Biting Midges 2
Parametriocnemus Non-Biting Midges 2
Paraphaenocladius Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Ironoquia Northern Caddisfly 1
LIMNEPHILIDAE Northern Casemaker Caddisfly 1
PISIDIIDAE Pill Clam 1
LEPTOPHLEBIIDAE Pronggilled Mayfly 1
Probezzia Biting Midges 1
Corynoneura Non-Biting Midges 1
TIPULIDAE Cranefly 1
Rhyacophila Free-Living Caddisfly 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.