MBSS Site Summary for: PRMO-313-R-2002

Site Photos

Field photo showing stream conditions at site PRMO-313-R-2002-1 (Opens in a new window) Field photo showing stream conditions at site PRMO-313-R-2002-2 (Opens in a new window) Field photo showing stream conditions at site PRMO-313-R-2002-3 (Opens in a new window) Field photo showing stream conditions at site PRMO-313-R-2002-4 (Opens in a new window)

Located on HORSEPEN BR in the Potomac River MO Cnty watershed, 8-digit code: 02140202.
This stream was visited in the spring on 3/4/2002 and again in the summer on 6/11/2002.

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 Poor - 1.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 3,803 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 4 %
Agricultural Land Use 59 %
Forested Land Use 34 %


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 7/20 (Marginal)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 65 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 15 meters 		6/20 (Marginal)
Shading 88 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 23.8 ° C
Dissolved oxygen (DO) 6.6 mg/L
pH (lab) 7.54
Conductivity 310 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1088 µeq/L
Dissolved organic carbon (DOC) 4.9 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 11 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mosquitofish 212
Eastern Mudminnow 39
Bluntnose Minnow 12
Pumpkinseed 8
Green Sunfish 5
Greenside Darter 3
Creek Chubsucker 2
Fallfish 2
Fathead Minnow 2
Eastern Silvery Minnow 1
Spotfin Shiner 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Canada Thistle
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 26
Tvetenia Non-Biting Midges 26
Stegopterna Black Fly 11
Parametriocnemus Non-Biting Midges 8
Capniidae Small Winter Stonefly 8
Diamesa Bloodworm 7
Diamesinae Non-Biting Midges 4
Amphinemura Spring Stonefly 4
Perlodidae Perlodid Stonefly 2
Corynoneura Non-Biting Midges 2
Clinocera Aquatic Dance Fly 2
Hydrobaenus Midge 2
Orthocladiinae Midge 2
Nemouridae Nemourid Stonefly 1
Ablabesmyia Non-Biting Midge 1
Tipulidae Cranefly 1
Paratendipes European Non-Biting Midge 1
Rhyacophila Free-Living Caddisfly 1
Physa Air-Breathing Freshwater Snail 1
Paratanytarsus Non-Biting Midges 1
Thienemanniella Non-Biting Midges 1
Centroptilum Small Minnow Mayfly 1
Hydroporus Water 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.