MBSS Site Summary for: CORS-131-X-2006


Located on Mill Stream Branch UT3 in the Corsica River watershed, 8-digit code: 02130507.
This stream was visited in the spring on 4/13/2006 and again in the summer on 8/2/2006.

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 N R
Benthic IBI Fair - 3.3 / 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 819 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 1 %
Agricultural Land Use 92 %
Forested Land Use 5 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 7.33
Alkalinity
(acid neutralizing capacity) 		1291.6 µeq/L
Dissolved organic carbon (DOC) 5.9747 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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
Eastern Snapping Turtle
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Micropsectra Non-Biting Midges 34
Orthocladius Non-Biting Midges 29
Caenis Mayfly 11
Orthocladiinae Midge 5
Gammarus Amphipod 5
Caecidotea Isopod 4
Thienemannimyia group Non-Biting Midges 4
Amphipoda Scud 2
Tubificidae Aquatic Worm 2
Simulium Black Fly 2
Sialis Alderfly 2
Polypedilum Non-Biting Midges 1
Calopteryx Damselfly 1
Plathemis Long-Tailed Skimmer Dragonfly 1
Belostoma 1
Pachydiplax 1
Pseudosuccinea Air Breathing Freshwater Snail 1
Ephydridae Shore Fly 1
Libellulidae Skimmer Dragonfly 1
Clinotanypus Non-Biting Midge 1
Stictochironomus Non-Biting Midge 1
Chironomus Non-Biting Midges 1
Conchapelopia 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.