MBSS Site Summary for: PTOB-103-R-2003

Site Photos

Field photo showing stream conditions at site PTOB-103-R-2003-709 (Opens in a new window) Field photo showing stream conditions at site PTOB-103-R-2003-710 (Opens in a new window) Field photo showing stream conditions at site PTOB-103-R-2003-860 (Opens in a new window) Field photo showing stream conditions at site PTOB-103-R-2003-861 (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 3/18/2003 and again in the summer on 6/26/2003.

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 - 1.3 / 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 513 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 5 %
Agricultural Land Use 30 %
Forested Land Use 64 %


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

Physical Stream Habitat
Instream Habitat 7/20 (Marginal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 12 meters 		6/20 (Marginal)
Riffle Quality
Riffle Extent = 75 meters 		12/20 (Suboptimal)
Shading 95 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 17.6 ° C
Dissolved oxygen (DO) 8.7 mg/L
pH (lab) 6.35
Conductivity 121 µmho/cm
Alkalinity
(acid neutralizing capacity) 		67.7 µeq/L
Dissolved organic carbon (DOC) 2.1 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 6
American Eel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern American Toad
Eastern Box Turtle
Northern Green Frog
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prostoia Spring Stonefly 15
Ephemerella Sulphur Mayfly 9
Parametriocnemus Non-Biting Midges 8
Prosimulium Black Fly 7
Tipula Crane Fly 5
Nemouridae Nemourid Stonefly 5
Amphinemura Spring Stonefly 4
Acerpenna Tiny Blue-Winged Olive Mayflies 3
Isoperla Stripetail Stonefly 3
Chloroperlidae Green Stonefly 3
Clioperla Green-Winged Stonefly 3
Perlodidae Perlodid Stonefly 3
Optioservus Riffle Beetle 3
Tubificidae Aquatic Worm 3
Pycnopsyche Great Autumn Brown Sedge Caddisfly 2
Ameletus Combmouthed Minnow Mayfly 2
Enchytraeidae Aquatic Worm 2
Crangonyx Amphipod 1
Stenonema Flatheaded Mayfly 1
Cura Flatworm 1
Oulimnius Riffle Beetle 1
Capniidae Small Winter Stonefly 1
Caecidotea Isopod 1
Diplectrona Net-Spinning Caddisfly 1
Chaetocladius Non-Biting Midges 1
Paraphaenocladius Non-Biting Midges 1
Limnephilidae Northern Casemaker Caddisfly 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.