MBSS Site Summary for: PTOB-002-S-2005


Located on Hoghole Run in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 4/11/2005 and again in the summer on 6/30/2005.

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 Good - 4.3 / 5.0
Benthic IBI Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
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 14/20 (Suboptimal)
Pool Quality
Pool Extent = 54 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 32 meters 		16/20 (Optimal)
Shading 90 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 23.4 ° C
Dissolved oxygen (DO) 8.4 mg/L
pH (lab) 6.46
Conductivity 52 µmho/cm
Alkalinity
(acid neutralizing capacity) 		71.11958 µeq/L
Dissolved organic carbon (DOC) 3.19 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
Blacknose Dace 89
Rosyside Dace 85
Eastern Mudminnow 63
Creek Chub 56
Creek Chubsucker 7
Least Brook Lamprey 3
Bluegill 1
Fallfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
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
Acerpenna Tiny Blue-Winged Olive Mayflies 21
Amphinemura Spring Stonefly 12
Oulimnius Riffle Beetle 12
Stenonema Flatheaded Mayfly 8
Haploperla Green Stonefly 5
Leuctra  Rolled-Winged Stonefly 4
Simulium Black Fly 4
Orthocladiinae Midge 3
Cheumatopsyche Net-Spinning Caddisfly 3
Parametriocnemus Non-Biting Midges 3
Hydropsyche Net-Spinning Caddisfly 2
Neophylax Caddisfly 2
Nigronia Megaloptera (Dark Fishfly) 2
Ancyronyx Spider Riffle Beetle 2
Thienemannimyia group Non-Biting Midges 2
Chloroperlidae Green Stonefly 2
Isoperla Stripetail Stonefly 1
Ephemerella Sulphur Mayfly 1
Limnephilidae Northern Casemaker Caddisfly 1
Prostoma Freshwater Nemertean (Ribbon Worm) 1
Pycnopsyche Great Autumn Brown Sedge Caddisfly 1
Antocha Crane Fly 1
Tubificidae Aquatic Worm 1
Stenelmis Beetle 1
Eukiefferiella Non-Biting Midges 1
Rheocricotopus Non-Biting Midges 1
Stempellinella Non-Biting Midges 1
Tanytarsus 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.