MBSS Site Summary for: PAXM-106-R-2001

Site Photos

Field photo showing stream conditions at site PAXM-106-R-2001-123 (Opens in a new window) Field photo showing stream conditions at site PAXM-106-R-2001-124 (Opens in a new window) Field photo showing stream conditions at site PAXM-106-R-2001-125 (Opens in a new window) Field photo showing stream conditions at site PAXM-106-R-2001-126 (Opens in a new window)

Located on MATAPONI CR UT1 in the Patuxent River middle watershed, 8-digit code: 02131102.
This stream was visited in the spring on 3/26/2001 and again in the summer on 6/11/2001.

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 Good - 4.0 / 5.0
Benthic IBI Good - 4.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,393 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 10 %
Agricultural Land Use 28 %
Forested Land Use 58 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 37 meters 		13/20 (Suboptimal)
Riffle Quality
Riffle Extent = 45 meters 		13/20 (Suboptimal)
Shading 90 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 18.5 ° C
Dissolved oxygen (DO) 8.2 mg/L
pH (lab) 6.26
Conductivity 170 µmho/cm
Alkalinity
(acid neutralizing capacity) 		81 µeq/L
Dissolved organic carbon (DOC) 3.4 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
Blacknose Dace 80
Rosyside Dace 50
Eastern Mudminnow 17
Tessellated Darter 12
White Sucker 7
Fallfish 6
American Eel 4
Bluegill 4
Least Brook Lamprey 4
Creek Chubsucker 1
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog
Northern Two-Lined Salamander
Southern Leopard Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Chloroperlidae Green Stonefly 26
Neophylax Caddisfly 15
Parametriocnemus Non-Biting Midges 14
Isoperla Stripetail Stonefly 10
Acerpenna Tiny Blue-Winged Olive Mayflies 5
Prosimulium Black Fly 5
Hexatoma Crane Fly 3
Prostoia Spring Stonefly 3
Ephemerella Sulphur Mayfly 3
Tvetenia Non-Biting Midges 3
Limnephilidae Northern Casemaker Caddisfly 3
Perlodidae Perlodid Stonefly 3
Orthocladiinae A Non-Biting Midges 2
Rheosmittia Non-Biting Midges 2
Cordulegaster Spiketail Dragonfly 2
Orthocladiinae Midge 2
Chironomini Non-Biting Midge 2
Chaetocladius Non-Biting Midges 1
Diplocladius Non-Biting Midges 1
Eukiefferiella Non-Biting Midges 1
Tipula Crane Fly 1
Polypedilum Non-Biting Midges 1
Simuliidae Black Fly 1
Leuctra  Rolled-Winged Stonefly 1
Crangonyx Amphipod 1
Tubificidae Aquatic Worm 1
Hirudinea Leech 1
Nigronia Megaloptera (Dark Fishfly) 1
Cricotopus/Orthocladius Midge 1
Amphinemura Spring Stonefly 1
Eccoptura Yellow Stone Stonefly 1
Ironoquia Northern Caddisfly 1
Oulimnius Riffle Beetle 1
Ancyronyx Spider Riffle 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.