MBSS Site Summary for: CE-P-078-109-97


Located on ROCK RUN in the L Susquehanna River watershed, 8-digit code: 02120201.
This stream was visited in the spring on 3/4/1997 and again in the summer on 6/3/1997.

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 Fair - 3.7 / 5.0
Benthic IBI Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 488 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 0 %
Agricultural Land Use 63.5 %
Forested Land Use 35.9 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 15/20 (Suboptimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = meters 		15/20 (Suboptimal)
Riffle Quality 11/20 (Suboptimal)
Shading 90 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 13.1 ° C
Dissolved oxygen (DO) 9.9 mg/L
pH (lab) 6.97
Conductivity 119 µmho/cm
Alkalinity
(acid neutralizing capacity) 		329.6 µeq/L
Dissolved organic carbon (DOC) 4 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
Creek Chub 149
Rosyside Dace 142
Blacknose Dace 93
Tessellated Darter 27
American Eel 13
Green Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
Cambarus bartonii bartonii

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 45
Prosimulium Black Fly 31
Neophylax Caddisfly 7
Prostoia Spring Stonefly 7
Epeorus Mayfly 6
Eurylophella Mayfly 3
Cricotopus/Orthocladius Midge 3
Baetis Blue-Winged Olive Mayfly 3
Amphinemura Spring Stonefly 2
Diplectrona Net-Spinning Caddisfly 2
Sympotthastia Non-Biting Midges 2
Acroneuria Golden Stoneflies 2
Stenonema Flatheaded Mayfly 2
Rhyacophila Free-Living Caddisfly 1
Paraleptophlebia Blue Quill Mayfly 1
Glossosoma Little Black Caddisfly 1
Serratella Mayfly 1
Tanytarsus Non-Biting Midges 1
Perlodidae Perlodid Stonefly 1
Oulimnius Riffle Beetle 1
Unniella Non-Biting Midge 1
Hemerodromia Tiny Fly 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.