MBSS Site Summary for: PTOB-102-X-2005


Located on Pages Swamp in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 7/20/2005 and again in the summer on 7/20/2005.

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 304 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 24 %
Agricultural Land Use 12 %
Forested Land Use 60 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 14/20 (Suboptimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 64 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 20 meters 		12/20 (Suboptimal)
Shading 93 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 22 ° C
Dissolved oxygen (DO) 6.6 mg/L
Conductivity 252 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:
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Synurella Amphipod 37
Caecidotea Isopod 22
Thienemannimyia group Non-Biting Midges 16
Ironoquia Northern Caddisfly 5
Apsectrotanypus Non-Biting Midges 4
Natarsia Non-Biting Midges 4
Spirosperma Aquatic Oligochaete Worm 2
Bezzia Biting Midge 2
Paratendipes European Non-Biting Midge 2
Chauliodes 2
Crangonyx Amphipod 2
Lepidoptera Aquatic Moth 1
Orthocladiinae Midge 1
Psectrocladius Non-Biting Midge 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.