MBSS Site Summary for: SAVA-204-S-2002

Site Photos

Field photo showing stream conditions at site SAVA-204-S-2002-1 (Opens in a new window)

Located on CRABTREE CR in the Savage River watershed, 8-digit code: 02141006.
This stream was visited in the spring on 4/2/2002 and again in the summer on 7/17/2002.

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 - 4.5 / 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 10,214 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 6.3 %
Agricultural Land Use 9.6 %
Forested Land Use 84 %


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

Physical Stream Habitat
Instream Habitat 19/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = 48 meters 		18/20 (Optimal)
Riffle Quality
Riffle Extent = 40 meters 		18/20 (Optimal)
Shading 85 %
Embeddedness 20 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 18.9 ° C
Dissolved oxygen (DO) 9.3 mg/L
pH (lab) 6.93
Conductivity 170 µmho/cm
Alkalinity
(acid neutralizing capacity) 		198.3 µeq/L
Dissolved organic carbon (DOC) 0.9 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 7 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 112
Blacknose Dace 44
Longnose Dace 30
Fantail Darter 13
Creek Chub 2
White Sucker 2
Brown Trout 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Micropsectra Non-Biting Midges 20
Oulimnius Riffle Beetle 17
Epeorus Mayfly 15
Ephemerella Sulphur Mayfly 11
Oemopteryx Stonefly 7
Leuctridae Rolledwinged Stonefly 5
Leptophlebiidae Pronggilled Mayfly 4
Paraleptophlebia Blue Quill Mayfly 4
Parametriocnemus Non-Biting Midges 3
Dolophilodes Medium Evening Sedge Caddisfly 2
Leuctra  Rolled-Winged Stonefly 2
Heterotrissocladius European Non-Biting Midge 2
Heptageniidae Flathead Mayfly 2
Ephemerellidae Spiny Crawler Mayfly 2
Isoperla Stripetail Stonefly 2
Lumbriculidae Worm 2
Alloperla Stonefly 1
Baetidae Small Minnow Mayfly 1
Stenonema Flatheaded Mayfly 1
Rhyacophila Free-Living Caddisfly 1
Chloroperlidae Green Stonefly 1
Chelifera Aquatic Dance Fly 1
Baetis Blue-Winged Olive Mayfly 1
Hydropsychidae Common Netspinner Caddisfly 1
Hydropsyche Net-Spinning Caddisfly 1
Fallceon 1
Tvetenia Non-Biting Midges 1
Perlodidae Perlodid 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.