MBSS Site Summary for: MANO-108-R-2003

Site Photos

Field photo showing stream conditions at site MANO-108-R-2003-0853 (Opens in a new window) Field photo showing stream conditions at site MANO-108-R-2003-0855 (Opens in a new window)

Located on GEANQUAKIN CR in the Manokin River watershed, 8-digit code: 02130208.
This stream was visited in the spring on 3/13/2003 and again in the summer on 7/9/2003.

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 - 1.0 / 5.0
Benthic IBI Poor - 1.6 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 175 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 1 %
Agricultural Land Use 13 %
Forested Land Use 67 %


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

Physical Stream Habitat
Instream Habitat 8/20 (Marginal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 4/20 (Poor)
Pool Quality
Pool Extent = 75 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
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 24.2 ° C
Dissolved oxygen (DO) 1.2 mg/L
Dissolved oxygen levels measured in the stream were very low (1.2 mg/L). Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
pH (lab) 4.5
Conductivity 252 µmho/cm
Alkalinity
(acid neutralizing capacity) 		-23.2 µeq/L
Dissolved organic carbon (DOC) 47.9 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
No Fish Observed 0
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Little Brown Skink
Southern Leopard Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Common Reed (Phragmites)
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Caecidotea Isopod 70
Crangonyx Amphipod 25
Tribelos Non-Biting Midges 4
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.