MBSS Site Summary for: CORS-102-S-2006


Located on Emory Creek UT1 in the Corsica River watershed, 8-digit code: 02130507.
This stream was visited in the spring on 4/27/2006 and again in the summer on 6/14/2006.

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 - 1.7 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 654 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 16.9 %
Forested Land Use 80.5 %


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

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = 75 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 95 %
Embeddedness 70 %
The embeddedness, a measure of silt on the stream bottom, was 70%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 17.8 ° C
Dissolved oxygen (DO) 5.1 mg/L
pH (lab) 6.62
Conductivity 138 µmho/cm
Alkalinity
(acid neutralizing capacity) 		319.1 µeq/L
Dissolved organic carbon (DOC) 16.5622 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
Redfin Pickerel 26
Eastern Mudminnow 7
Golden Shiner 2
Green Sunfish 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Fowler's Toad
Gray Treefrog
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Synurella Amphipod 43
Zavrelimyia Non-Biting Midges 38
Dytiscidae Predaceous Diving Beetle 14
Musculium Fingernail Clam 7
Orthocladius Non-Biting Midges 6
Tanytarsus Non-Biting Midges 6
Micropsectra Non-Biting Midges 5
Caecidotea Isopod 4
Somatochlora 3
Physa Air-Breathing Freshwater Snail 3
Chaetocladius Non-Biting Midges 3
Chironomus Non-Biting Midges 2
Leptophlebia Pronggilled Mayfly 2
Amphinemura Spring Stonefly 2
Lumbriculidae Worm 2
Tanypodinae Non-Biting Midges 1
Ironoquia Northern Caddisfly 1
Menetus Air Breathing Freshwater Snail 1
Spirosperma Aquatic Oligochaete Worm 1
Aeshna Mosaic Darner Dragonflies 1
Odontomesa Non-Biting Midge 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.