MBSS Site Summary for: AA-N-250-217-97


Located on NORTH R in the South River watershed, 8-digit code: 02131003.
This stream was visited in the spring on 3/31/1997 and again in the summer on 7/31/1997.

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 N R
Benthic IBI Poor - 2.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,645 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 2.4 %
Agricultural Land Use 29.8 %
Forested Land Use 67.5 %


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) 5.14
Alkalinity
(acid neutralizing capacity) 		0.6 µeq/L
Dissolved organic carbon (DOC) 2.1 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:
American Bullfrog
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
Simulium Black Fly 52
Stegopterna Black Fly 16
Polypedilum Non-Biting Midges 5
Psectrocladius Non-Biting Midge 5
Cladotanytarsus Non-Biting Midge 3
Krenopelopia Non-Biting Midge 1
Leuctra  Rolled-Winged Stonefly 1
Enchytraeidae Aquatic Worm 1
Pisidium Freshwater Pea (Pill) Clam 1
Caecidotea Isopod 1
Nigronia Megaloptera (Dark Fishfly) 1
Cricotopus/Orthocladius Midge 1
Ablabesmyia Non-Biting Midge 1
Conchapelopia Non-Biting Midges 1
Rheocricotopus Non-Biting Midges 1
Amphipoda Scud 1
Polycentropus Tube Maker Caddisfly 1
Limnodrilus Worm 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.