MBSS Site Summary for: GA-A-416-118-96


Located on BLACKHAWK RUN in the Savage River watershed, 8-digit code: 02141006.
This stream was visited in the spring on 4/17/1996 and again in the summer on 6/27/1996.

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 - 1.0 / 5.0
Benthic IBI Good - 4.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 259 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 3.5 %
Forested Land Use 91.9 %


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 11/20 (Suboptimal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = meters 		6/20 (Marginal)
Riffle Quality 7/20 (Marginal)
Shading 95 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 13 ° C
Dissolved oxygen (DO) 8.4 mg/L
pH (lab) 6.79
Conductivity 38 µmho/cm
Alkalinity
(acid neutralizing capacity) 		61.1 µeq/L
Dissolved organic carbon (DOC) 0.6 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 1 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
No Fish Observed 0
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Allegheny Mountain Dusky Salamander
Eastern Red-Backed Salamander
Northern Dusky Salamander
Northern Slimy Salamander
Northern Two-Lined Salamander
Seal 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 24
Epeorus Mayfly 19
Paraleptophlebia Blue Quill Mayfly 9
Amphinemura Spring Stonefly 9
Leuctra  Rolled-Winged Stonefly 5
Cinygmula Dark Red Quill Mayfly 4
Diplectrona Net-Spinning Caddisfly 3
Rhyacophila Free-Living Caddisfly 3
Eukiefferiella Non-Biting Midges 3
Baetidae Small Minnow Mayfly 3
Prosimulium Black Fly 2
Perlodidae Perlodid Stonefly 2
Pteronarcys Giant Stonefly 2
Ameletus Combmouthed Minnow Mayfly 2
Hexatoma Crane Fly 1
Wormaldia Fingernet Caddisfly 1
Bezzia Biting Midge 1
Lanthus Clubtail Dragonfly 1
Dicranota Hairy-Eyed Cranefly 1
Hydropsyche Net-Spinning Caddisfly 1
Oulimnius Riffle Beetle 1
Micropsectra 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.