MBSS Site Summary for: ROCK-107-R-2003

Site Photos

Field photo showing stream conditions at site ROCK-107-R-2003-770 (Opens in a new window) Field photo showing stream conditions at site ROCK-107-R-2003-771 (Opens in a new window) Field photo showing stream conditions at site ROCK-107-R-2003-772 (Opens in a new window)

Located on ROCK CR UT2 in the Rock Creek watershed, 8-digit code: 02140206.
This stream was visited in the spring on 4/3/2003 and again in the summer on 6/17/2003.

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 Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 193 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 100 %
Agricultural Land Use 1 %
Forested Land Use 1 %


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

Physical Stream Habitat
Instream Habitat 7/20 (Marginal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 38 meters 		7/20 (Marginal)
Riffle Quality
Riffle Extent = 37 meters 		11/20 (Suboptimal)
Shading 95 %
Embeddedness 30 %


Stream Water Quality:
Water temperature 16 ° C
Dissolved oxygen (DO) 8.1 mg/L
pH (lab) 7.24
Conductivity 388 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1963 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 1 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
Cambarus

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cheumatopsyche Net-Spinning Caddisfly 22
Lumbriculidae Worm 11
Orthocladius Non-Biting Midges 8
Enchytraeidae Aquatic Worm 4
Hydropsyche Net-Spinning Caddisfly 2
Planorbidae Ramshorn Snail 1
Tubificidae Aquatic Worm 1
Stagnicola Air Breathing Freshwater Snail 1
Physa Air-Breathing Freshwater Snail 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.