MBSS Site Summary for: NCRW-201-N-2004


Located on WOLFTRAP CR in the watershed, 8-digit code: .
This stream was visited in the spring on 3/9/2004 and again in the summer on 6/8/2004.

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 N R
Benthic IBI N R

Land Use

Land use can provide important information for determining stream health.
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Catchment area 3,599 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 66 %
Agricultural Land Use 10 %
Forested Land Use 24 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 8/20 (Marginal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 39 meters 		12/20 (Suboptimal)
Shading 85 %
Embeddedness 30 %


Stream Water Quality:
Water temperature 20.2 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 7.16
Alkalinity
(acid neutralizing capacity) 		605.5 µeq/L
Dissolved organic carbon (DOC) 2 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 14 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 164
White Sucker 28
Pumpkinseed 15
Tessellated Darter 11
Longnose Dace 9
Satinfin Shiner 8
Swallowtail Shiner 8
Rosyside Dace 7
Yellow Bullhead 5
American Eel 4
Bluegill 4
Creek Chub 3
Largemouth Bass 2
Green Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 13
Brillia Non-Biting Midges 8
Tvetenia Non-Biting Midges 6
Hydrobaenus Midge 5
Cheumatopsyche Net-Spinning Caddisfly 5
Chironomidae Non-Biting Midge 4
Diamesa Bloodworm 3
Polypedilum Non-Biting Midges 3
Tubificidae Aquatic Worm 2
Eukiefferiella Non-Biting Midges 2
Microtendipes Non-Biting Midges 1
Naididae Aquatic Worm 1
Calopteryx Damselfly 1
Rheosmittia Non-Biting Midges 1
Ancyronyx Spider Riffle Beetle 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.