MBSS Site Summary for: GA-A-306-210-97


Located on CRAB RUN in the Casselman River watershed, 8-digit code: 05020204.
This stream was visited in the spring on 4/3/1997 and again in the summer on 8/12/1997.

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 Poor - 1.5 / 5.0
Benthic IBI Poor - 2.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 943 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 0.2 %
Agricultural Land Use 74.2 %
Forested Land Use 25.3 %


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

Physical Stream Habitat
Instream Habitat 11/20 (Suboptimal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = meters 		7/20 (Marginal)
Riffle Quality 6/20 (Marginal)
Shading 60 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 23 ° C
Dissolved oxygen (DO) 9.1 mg/L
pH (lab) 7.69
Conductivity 280 µmho/cm
Alkalinity
(acid neutralizing capacity) 		647.1 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:
The following 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 173
Creek Chub 126
White Sucker 42
Central Stoneroller 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
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
Baetis Blue-Winged Olive Mayfly 30
Parametriocnemus Non-Biting Midges 30
Polypedilum Non-Biting Midges 15
Paraleptophlebia Blue Quill Mayfly 15
Eukiefferiella Non-Biting Midges 12
Cheumatopsyche Net-Spinning Caddisfly 4
Conchapelopia Non-Biting Midges 4
Naididae Aquatic Worm 4
Isoperla Stripetail Stonefly 4
Hydropsyche Net-Spinning Caddisfly 3
Micropsectra Non-Biting Midges 3
Bezzia Biting Midge 2
Antocha Crane Fly 2
Stenonema Flatheaded Mayfly 2
Optioservus Riffle Beetle 2
Rheotanytarsus Non-Biting Midges 2
Thienemanniella Non-Biting Midges 1
Amphinemura Spring Stonefly 1
Rhyacophila Free-Living Caddisfly 1
Serratella Mayfly 1
Nemouridae Nemourid Stonefly 1
Empididae Dance Fly 1
Ceratopogon Biting Midge 1
Microtendipes Non-Biting Midges 1
Nanocladius Non-Biting Midges 1
Corynoneura 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.