MBSS Site Summary for: PTOB-106-B-2008

Site Photos

Field photo showing stream conditions at site PTOB-106-B-2008-1 (Opens in a new window) Field photo showing stream conditions at site PTOB-106-B-2008-2 (Opens in a new window)

Located on UT PORT TABACCO CREEK in the Port Tobacco River watershed, 8-digit code: 02140109.
This stream was visited in the spring on 3/10/2008 and again in the summer on 7/21/2008.

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 - 1.7 / 5.0
Benthic IBI Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 297 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 52.7 %
Agricultural Land Use 16.8 %
Forested Land Use 29.5 %


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

Physical Stream Habitat
Instream Habitat 15/20 (Suboptimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 46 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 39 meters 		14/20 (Suboptimal)
Shading 55 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 28.6 ° C
Dissolved oxygen (DO) 8.6 mg/L
pH (lab) 7.44
Conductivity 610 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1295.6 µeq/L
Dissolved organic carbon (DOC) 2.6551 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 1 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 257
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog

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
Orthocladius Non-Biting Midges 28
Cheumatopsyche Net-Spinning Caddisfly 15
Cricotopus Non-Biting Midges 11
Micropsectra Non-Biting Midges 11
Ancyronyx Spider Riffle Beetle 7
Physa Air-Breathing Freshwater Snail 6
Limnodrilus Worm 4
Thienemanniella Non-Biting Midges 3
Polypedilum Non-Biting Midges 3
Rheotanytarsus Non-Biting Midges 2
Tanytarsus Non-Biting Midges 2
Thienemannimyia Group Non-Biting Midges 2
Microtendipes Non-Biting Midges 2
Cryptochironomus Non-Biting Midges 2
Erpobdellidae Leech 2
Dicrotendipes Non-Biting Midges 1
Stenelmis Beetle 1
Chironomus Non-Biting Midges 1
Pisidiidae Pill Clam 1
Amphinemura Spring 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.