MBSS Site Summary for: HO-P-239-217-97


Located on DORSEY RUN in the Brighton Dam watershed, 8-digit code: 02131108.
This stream was visited in the spring on 3/13/1997 and again in the summer on 7/17/1997.

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 Good - 4.0 / 5.0
Benthic IBI Good - 5.0 / 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 2,162 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 2.6 %
Agricultural Land Use 68.2 %
Forested Land Use 27.6 %


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 17/20 (Optimal)
Velocity/Depth Diversity 14/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		15/20 (Suboptimal)
Riffle Quality 14/20 (Suboptimal)
Shading 94 %
Embeddedness 15 %


Stream Water Quality:
Water temperature 23.4 ° C
Dissolved oxygen (DO) 8 mg/L
pH (lab) 7.2
Conductivity 172 µmho/cm
Alkalinity
(acid neutralizing capacity) 		401.4 µeq/L
Dissolved organic carbon (DOC) 1.2 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 13 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 174
Rosyside Dace 145
Longnose Dace 128
White Sucker 118
Creek Chub 91
Cutlip Minnow 38
Central Stoneroller 36
Tessellated Darter 34
Fallfish 11
Largemouth Bass 4
Margined Madtom 3
Bluegill 2
Fathead Minnow 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
Orconectes virilis

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 47
Baetis Blue-Winged Olive Mayfly 5
Simulium Black Fly 4
Eukiefferiella Non-Biting Midges 4
Parametriocnemus Non-Biting Midges 4
Polypedilum Non-Biting Midges 3
Oulimnius Riffle Beetle 3
Amphinemura Spring Stonefly 3
Prosimulium Black Fly 2
Perlodidae Perlodid Stonefly 2
Serratella Mayfly 2
Cheumatopsyche Net-Spinning Caddisfly 2
Chelifera Aquatic Dance Fly 2
Clinocera Aquatic Dance Fly 1
Diamesa Bloodworm 1
Paraleptophlebia Blue Quill Mayfly 1
Ameletus Combmouthed Minnow Mayfly 1
Antocha Crane Fly 1
Stenonema Flatheaded Mayfly 1
Chloroperlidae Green Stonefly 1
Dicranota Hairy-Eyed Cranefly 1
Brillia Non-Biting Midges 1
Conchapelopia Non-Biting Midges 1
Cricotopus Non-Biting Midges 1
Cricotopus/Orthocladius Midge 1
Orthocladius Non-Biting Midges 1
Optioservus Riffle Beetle 1
Thienemanniella Non-Biting Midges 1
Agapetus Tiny Black Short-Horned Caddisfly 1
Psephenus Water Penny 1
Eccoptura Yellow Stone Stonefly 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.