MBSS Site Summary for: PTOB-101-X-2005


Located on Port Tobacco Creek UT1 UT1 in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 7/5/2005 and again in the summer on 7/5/2005.

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 Poor - 1.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 222 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 42 %
Agricultural Land Use 7 %
Forested Land Use 51 %


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

Physical Stream Habitat
Instream Habitat 5/20 (Poor)
Epifaunal Substrate 6/20 (Marginal)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = 55 meters 		6/20 (Marginal)
Riffle Quality
Riffle Extent = 20 meters 		6/20 (Marginal)
Shading 95 %
Embeddedness 80 %
The embeddedness, a measure of silt on the stream bottom, was 80%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 21.7 ° C
Dissolved oxygen (DO) 7.2 mg/L
Conductivity 137 µmho/cm

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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
American Bullfrog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 30
Cricotopus Non-Biting Midges 20
Hydrobaenus Midge 15
Diplocladius Non-Biting Midges 5
Eukiefferiella Non-Biting Midges 5
Ironoquia Northern Caddisfly 4
Isotomidae Springtail 3
Polypedilum Non-Biting Midges 3
Musculium Fingernail Clam 3
Chironomus Non-Biting Midges 2
Tubificidae Aquatic Worm 2
Calopteryx Damselfly 1
Chironomini Non-Biting Midge 1
Synurella Amphipod 1
Spirosperma Aquatic Oligochaete Worm 1
Enchytraeidae Aquatic Worm 1
Naididae Aquatic 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.