MBSS Site Summary for: LOPC-110-B-2008

Site Photos

Field photo showing stream conditions at site LOPC-110-B-2008-1 (Opens in a new window) Field photo showing stream conditions at site LOPC-110-B-2008-2 (Opens in a new window)

Located on SPRING HILL BRANCH in the Lower Pocomoke River watershed, 8-digit code: 02130202.
This stream was visited in the spring on 3/10/2008 and again in the summer on 7/8/2008.

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 - 2.0 / 5.0
Benthic IBI Poor - 2.1 / 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 1,285 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 0.4 %
Agricultural Land Use 54.3 %
Forested Land Use 44.2 %


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

Physical Stream Habitat
Instream Habitat 4/20 (Poor)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 1/20 (Poor)
Pool Quality
Pool Extent = 68 meters 		6/20 (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.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 22.1 ° C
Dissolved oxygen (DO) 0.5 mg/L
Dissolved oxygen levels measured in the stream were very low (0.5 mg/L). Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
pH (lab) 5.93
Conductivity 189 µmho/cm
Alkalinity
(acid neutralizing capacity) 		104.5 µeq/L
Dissolved organic carbon (DOC) 15.869 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 15
Green Sunfish 4
Redfin Pickerel 2
Golden Shiner 1
Largemouth Bass 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Common Five-Lined Skink
Eastern Ratsnake
Fowler's Toad
Gray Treefrog
New Jersey Chorus Frog
Pickerel 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
Caecidotea Isopod 44
Nemouridae Nemourid Stonefly 28
Stegopterna Black Fly 12
Neoporus 7
Ironoquia Northern Caddisfly 6
Crangonyx Amphipod 5
Amphipoda Scud 4
Agabus Predatory Aquatic Beetle 2
Ptilostomis Giant Casemaker Caddisfly 2
Epiaeschna 1
Cnephia Black Fly 1
Tipula Crane Fly 1
Limnephilidae Northern Casemaker 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.