MBSS Site Summary for: WO-S-003-308-97


Located on POCOMOKE R in the Upper Pocomoke River watershed, 8-digit code: 02130203.
This stream was visited in the spring on 3/10/1997 and again in the summer on 7/16/1997.

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 Fair - 3.7 / 5.0
Benthic IBI Good - 4.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 35,917 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 0.2 %
Agricultural Land Use 50.9 %
Forested Land Use 47.7 %


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

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = meters 		6/20 (Marginal)
Riffle Quality 6/20 (Marginal)
Shading 65 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.


Stream Water Quality:
Water temperature 24.8 ° C
Dissolved oxygen (DO) 6 mg/L
pH (lab) 5.93
Conductivity 81 µmho/cm
Alkalinity
(acid neutralizing capacity) 		134.5 µeq/L
Dissolved organic carbon (DOC) 12.3 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 11 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
American Eel 77
Tessellated Darter 26
Pirate Perch 12
Tadpole Madtom 9
Redfin Pickerel 6
Redbreast Sunfish 5
Creek Chubsucker 4
Satinfin Shiner 3
Bluegill 1
Eastern Mudminnow 1
Least Brook Lamprey 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Stenonema Flatheaded Mayfly 17
Conchapelopia Non-Biting Midges 9
Rheotanytarsus Non-Biting Midges 9
Polypedilum Non-Biting Midges 8
Rheocricotopus Non-Biting Midges 6
Pycnopsyche Great Autumn Brown Sedge Caddisfly 6
Stegopterna Black Fly 3
Polycentropus Tube Maker Caddisfly 3
Sphaerium Fingernail Clam 3
Phylocentropus Caddisfly 2
Simuliidae Black Fly 2
Nilotanypus 2
Cricotopus Non-Biting Midges 2
Nanocladius Non-Biting Midges 1
Cheumatopsyche Net-Spinning Caddisfly 1
Dubiraphia Riffle Beetle 1
Ancyronyx Spider Riffle Beetle 1
Gammarus Amphipod 1
Lepidoptera Aquatic Moth 1
Corbicula Basket Clam 1
Endochironomus 1
Calopteryx Damselfly 1
Hydroporus Water Beetle 1
Gyrinus Whirlygig Beetle 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.