MBSS Site Summary for: PCSO-102-R-2003


Located on MARUMSCO CR in the Pocomoke Sound watershed, 8-digit code: 02130201.
This stream was visited in the spring on 3/12/2003 and again in the summer on 7/8/2003.

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 - 1.7 / 5.0
Benthic IBI Poor - 2.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,117 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 3 %
Agricultural Land Use 39 %
Forested Land Use 50 %


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

Physical Stream Habitat
Instream Habitat 6/20 (Marginal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 3/20 (Poor)
Pool Quality
Pool Extent = 75 meters 		7/20 (Marginal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 92 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 23.4 ° C
Dissolved oxygen (DO) 2.9 mg/L
Dissolved oxygen levels measured in the stream were very low (2.9 mg/L). Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
pH (lab) 5.5
Conductivity 194 µmho/cm
Alkalinity
(acid neutralizing capacity) 		60.8 µeq/L
Dissolved organic carbon (DOC) 13.2 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 110
Pirate Perch 14
Redfin Pickerel 7
American Eel 3
Largemouth Bass 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Gray Treefrog
Northern Green Frog
Southern Leopard Frog

Crayfish:
Cambaridae

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 51
Tubificidae Aquatic Worm 12
Tipulidae Cranefly 6
Tvetenia Non-Biting Midges 6
Nemouridae Nemourid Stonefly 5
Orthocladius Non-Biting Midges 4
Crangonyx Amphipod 4
Lumbriculidae Worm 4
Hydroporus Water Beetle 3
Synurella Amphipod 3
Stegopterna Black Fly 1
Dolichopodidae Long-Legged Fly 1
Ironoquia Northern 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.