MBSS Site Summary for: CORS-102-S-2015

Site Photos

Field photo showing stream conditions at site CORS-102-S-2015_Midpoint-downstream (Opens in a new window) Field photo showing stream conditions at site CORS-102-S-2015_Midpoint-upstream (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 3/16/2015 and again in the summer on 7/10/2015.

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 - 3.0 / 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 3.9 %
Agricultural Land Use 11.1 %
Forested Land Use 84 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 21 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 54 meters 		12/20 (Suboptimal)
Shading 70 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.


Stream Water Quality:
pH (lab) 6.42
Alkalinity
(acid neutralizing capacity) 		126.2 µeq/L
Dissolved organic carbon (DOC) 13.3841 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 214
Redfin Pickerel 7
American Eel 4
Golden Shiner 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Snapping Turtle
Northern Green Frog
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Stegopterna Black Fly 26
Capniidae Small Winter Stonefly 23
Prosimulium Black Fly 22
Leptophlebiidae Pronggilled Mayfly 18
Nemouridae Nemourid Stonefly 6
Simulium Black Fly 5
Erioptera Cranefly 5
Orthocladius Non-Biting Midges 4
Tipula Crane Fly 4
Thienemannimyia Group Non-Biting Midges 2
Zavrelimyia Non-Biting Midges 2
Bezzia Biting Midge 2
Synurella Amphipod 1
Orthocladiinae Midge 1
Pseudolimnophila Crane Fly 1
Parametriocnemus Non-Biting Midges 1
Parachaetocladius Non-Biting Midge 1
Micropsectra 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.