MBSS Site Summary for: PTOB-002-S-2009

Site Photos

Field photo showing stream conditions at site PTOB-002-S-2009-1 (Opens in a new window) Field photo showing stream conditions at site PTOB-002-S-2009-2 (Opens in a new window)

Located on Hoghole Run in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 3/9/2009 and again in the summer on 6/8/2009.

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 - 4.0 / 5.0
Benthic IBI Good - 4.4 / 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 2,329 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 3.4 %
Agricultural Land Use 25.5 %
Forested Land Use 70 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 52 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 33 meters 		13/20 (Suboptimal)
Shading 85 %
Embeddedness 20 %


Stream Water Quality:
Water temperature 18.7 ° C
Dissolved oxygen (DO) 8.6 mg/L
pH (lab) 6.36
Conductivity 59 µmho/cm
Alkalinity
(acid neutralizing capacity) 		69.4 µeq/L
Dissolved organic carbon (DOC) 2.5631 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 72
Eastern Mudminnow 40
Rosyside Dace 22
Creek Chub 6
Creek Chubsucker 4
American Eel 2
Least Brook Lamprey 2
Tadpole Madtom 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern Cricket Frog
Eastern Wormsnake
Northern Green Frog
Northern Two-Lined Salamander
Pickerel Frog

Crayfish:
Cambarus bartonii bartonii
Orconectes limosus

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 42
Synurella Amphipod 13
Amphinemura Spring Stonefly 9
Hydrobaenus Midge 8
Sympotthastia Non-Biting Midges 7
Prostoia Spring Stonefly 5
Nemouridae Nemourid Stonefly 5
Helichus Beetle 3
Neophylax Caddisfly 3
Capniidae Small Winter Stonefly 3
Paraphaenocladius Non-Biting Midges 2
Strophopteryx Early Brown Stonefly 2
Caecidotea Isopod 2
Lepidostoma Little Brown Sedge Caddisfly 1
Maccaffertium March Brown And Cahill Mayfly 1
Nigronia Megaloptera (Dark Fishfly) 1
Diplocladius Non-Biting Midges 1
Eukiefferiella Non-Biting Midges 1
Micropsectra Non-Biting Midges 1
Prostoma Freshwater Nemertean (Ribbon Worm) 1
Chloroperlidae Green Stonefly 1
Ameletus Combmouthed Minnow Mayfly 1
Hexatoma Crane Fly 1
Probezzia Biting Midges 1
Stegopterna Black Fly 1
Orthocladiinae Midge 1
Stilocladius Midge 1
Thienemannimyia Group Non-Biting Midges 1
Perlodidae Perlodid Stonefly 1
Optioservus Riffle Beetle 1
Crangonyctidae Scud 1
Crangonyx Amphipod 1
Lumbriculidae Worm 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.