MBSS Site Summary for: PTOB-119-X-2005


Located on Jennie Run in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 7/6/2005 and again in the summer on 7/6/2005.

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 N R
Benthic IBI Good - 4.1 / 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 2,208 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 19 %
Agricultural Land Use 23 %
Forested Land Use 56 %


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

Physical Stream Habitat
Instream Habitat 5/20 (Poor)
Epifaunal Substrate 3/20 (Poor)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = 47 meters 		3/20 (Poor)
Riffle Quality
Riffle Extent = 28 meters 		4/20 (Poor)
Shading 93 %
Embeddedness 80 %
The embeddedness, a measure of silt on the stream bottom, was 80%. This is relatively high, and may exclude some biota.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 17.9 ° C
Dissolved oxygen (DO) 7.8 mg/L
Conductivity 155 µmho/cm

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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
Northern Green Frog
Northern Two-Lined Salamander

Crayfish:
Cambaridae

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 23
Orthocladius Non-Biting Midges 15
Ephemerella Sulphur Mayfly 12
Haploperla Green Stonefly 11
Ephemerellidae Spiny Crawler Mayfly 6
Isoperla Stripetail Stonefly 6
Amphinemura Spring Stonefly 4
Chloroperlidae Green Stonefly 4
Eukiefferiella Non-Biting Midges 3
Hydropsyche Net-Spinning Caddisfly 2
Thienemanniella Non-Biting Midges 2
Thienemannimyia group Non-Biting Midges 1
Oulimnius Riffle Beetle 1
Leuctridae Rolledwinged Stonefly 1
Rheocricotopus Non-Biting Midges 1
Sympotthastia Non-Biting Midges 1
Cheumatopsyche Net-Spinning Caddisfly 1
Anchytarsus Beetle 1
Gomphidae Clubtail Dragonfly 1
Hexatoma Crane Fly 1
Chrysops Deerfly 1
Dineutus Whirlygig Beetle 1
Eccoptura Yellow Stone Stonefly 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.