MBSS Site Summary for: EVIT-101-R-2004


Located on HAZEN RUN in the Evitts Creek watershed, 8-digit code: 02141002.
This stream was visited in the spring on 3/4/2004 and again in the summer on 6/28/2004.

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 Poor - 2.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 601 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 3 %
Agricultural Land Use 2 %
Forested Land Use 96 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 17 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 75 meters 		16/20 (Optimal)
Shading 90 %
Embeddedness 30 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 12.6 ° C
Dissolved oxygen (DO) 9.1 mg/L
pH (lab) 7.85
Conductivity 261 µmho/cm
Alkalinity
(acid neutralizing capacity) 		972.5 µeq/L
Dissolved organic carbon (DOC) 1.1 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 266
Rainbow Trout 24
Longnose Dace 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Gammarus Amphipod 39
Leuctra  Rolled-Winged Stonefly 30
Antocha Crane Fly 10
Rhyacophila Free-Living Caddisfly 7
Optioservus Riffle Beetle 7
Oulimnius Riffle Beetle 7
Orthocladius Non-Biting Midges 6
Diplectrona Net-Spinning Caddisfly 4
Prosimulium Black Fly 4
Diamesa Bloodworm 4
Sympotthastia Non-Biting Midges 3
Pteronarcys Giant Stonefly 2
Epeorus Mayfly 2
Orthocladiinae Midge 1
Caecidotea Isopod 1
Hexatoma Crane Fly 1
Parametriocnemus Non-Biting Midges 1
Diamesinae Non-Biting Midges 1
Eukiefferiella Non-Biting Midges 1
Micropsectra Non-Biting Midges 1
Lumbriculidae 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.