MBSS Site Summary for: PTOB-113-R-2003

Site Photos

Field photo showing stream conditions at site PTOB-113-R-2003-728 (Opens in a new window) Field photo showing stream conditions at site PTOB-113-R-2003-729 (Opens in a new window)

Located on PORT TOBACCO R UT2 in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 3/31/2003 and again in the summer on 7/8/2003.

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 - 2.0 / 5.0
Benthic IBI Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 357 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 7 %
Agricultural Land Use 33 %
Forested Land Use 59 %


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

Physical Stream Habitat
Instream Habitat 11/20 (Suboptimal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 8/20 (Marginal)
Pool Quality
Pool Extent = 14 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 65 meters 		13/20 (Suboptimal)
Shading 95 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 20.1 ° C
Dissolved oxygen (DO) 8.2 mg/L
pH (lab) 6.37
Conductivity 137 µmho/cm
Alkalinity
(acid neutralizing capacity) 		81.6 µeq/L
Dissolved organic carbon (DOC) 3.2 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 62
Creek Chub 24
Eastern Mudminnow 17
American Eel 10
Rosyside Dace 8
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Northern Green Frog
Northern Red Salamander
Northern Two-Lined Salamander
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 38
Amphinemura Spring Stonefly 29
Isoperla Stripetail Stonefly 8
Leuctra  Rolled-Winged Stonefly 7
Diamesa Bloodworm 6
Psephenus Water Penny 4
Acerpenna Tiny Blue-Winged Olive Mayflies 3
Oulimnius Riffle Beetle 3
Tipula Crane Fly 3
Paraleptophlebia Blue Quill Mayfly 2
Neophylax Caddisfly 2
Orthocladius Non-Biting Midges 2
Parametriocnemus Non-Biting Midges 2
Polypedilum Non-Biting Midges 2
Eukiefferiella Non-Biting Midges 2
Chloroperlidae Green Stonefly 2
Lepidostoma Little Brown Sedge Caddisfly 2
Diplectrona Net-Spinning Caddisfly 2
Chironomini Non-Biting Midge 1
Microtendipes Non-Biting Midges 1
Lumbriculidae Worm 1
Tanytarsini Non-Biting Midges 1
Tanytarsus Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Zavrelimyia Non-Biting Midges 1
Perlodidae Perlodid Stonefly 1
Ameletus Combmouthed Minnow Mayfly 1
Pseudolimnophila Crane Fly 1
Ormosia Cranefly 1
Stenonema Flatheaded Mayfly 1
Stenelmis Beetle 1
Ceratopogon 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.