MBSS Site Summary for: PTOB-002-S-2006


Located on Hoghole Run in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 3/15/2006 and again in the summer on 7/17/2006.

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 Fair - 3.7 / 5.0
Benthic IBI Good - 4.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,253 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 2.9 %
Agricultural Land Use 25.8 %
Forested Land Use 70.1 %


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 14/20 (Suboptimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 46 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 35 meters 		14/20 (Suboptimal)
Shading 90 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 26.7 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 6.59
Conductivity 47 µmho/cm
Alkalinity
(acid neutralizing capacity) 		84.4 µeq/L
Dissolved organic carbon (DOC) 3.437 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 8 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 122
Rosyside Dace 36
Blacknose Dace 32
Creek Chub 18
Least Brook Lamprey 3
Fallfish 2
American Eel 1
Creek Chubsucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Wood Frog

Crayfish:
Cambarus bartonii bartonii
Orconectes limosus

Exotic Plants:
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 42
Eukiefferiella Non-Biting Midges 9
Prostoia Spring Stonefly 6
Orthocladius Non-Biting Midges 6
Simuliidae Black Fly 5
Isoperla Stripetail Stonefly 5
Oulimnius Riffle Beetle 5
Neophylax Caddisfly 4
Hydrobaenus Midge 4
Chloroperlidae Green Stonefly 3
Optioservus Riffle Beetle 3
Acerpenna Tiny Blue-Winged Olive Mayflies 3
Lumbriculidae Worm 3
Perlodidae Perlodid Stonefly 2
Dubiraphia Riffle Beetle 2
Prosimulium Black Fly 2
Siphlonurus Gray Drake Mayfly 2
Simulium Black Fly 2
Synurella Amphipod 2
Spirosperma Aquatic Oligochaete Worm 1
Probezzia Biting Midges 1
Hexatoma Crane Fly 1
Strophopteryx Early Brown Stonefly 1
Rhyacophila Free-Living Caddisfly 1
Orthocladiinae Midge 1
Parametriocnemus Non-Biting Midges 1
Tanytarsus Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Micropsectra Non-Biting Midges 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.