MBSS Site Summary for: LPAX-112-R-2000

Site Photos

Field photo showing stream conditions at site LPAX-112-R-2000-07_13 (Opens in a new window) Field photo showing stream conditions at site LPAX-112-R-2000-07_14 (Opens in a new window)

Located on HAMMOND BR in the Little Patuxent River watershed, 8-digit code: 02131105.
This stream was visited in the spring on 3/15/2000 and again in the summer on 7/18/2000.

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 Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,091 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 5.7 %
Agricultural Land Use 60.1 %
Forested Land Use 34.2 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 40 meters 		13/20 (Suboptimal)
Riffle Quality
Riffle Extent = 50 meters 		12/20 (Suboptimal)
Shading 85 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 18.6 ° C
Dissolved oxygen (DO) 8.3 mg/L
pH (lab) 7.67
Conductivity 200 µmho/cm
Alkalinity
(acid neutralizing capacity) 		540.4 µeq/L
Dissolved organic carbon (DOC) 1.7 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 12 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Rosyside Dace 285
Blacknose Dace 168
Tessellated Darter 114
Longnose Dace 83
White Sucker 80
Fallfish 61
Swallowtail Shiner 59
Creek Chub 25
Cutlip Minnow 20
Eastern Mudminnow 7
Redbreast Sunfish 6
American Eel 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 38
Orthocladiinae A Non-Biting Midges 18
Clinocera Aquatic Dance Fly 17
Eurylophella Mayfly 9
Diamesa Bloodworm 6
Ephemerella Sulphur Mayfly 6
Stenonema Flatheaded Mayfly 4
Centroptilum Small Minnow Mayfly 4
Cheumatopsyche Net-Spinning Caddisfly 3
Optioservus Riffle Beetle 2
Corynoneura Non-Biting Midges 1
Amphinemura Spring Stonefly 1
Prostoia Spring Stonefly 1
Parametriocnemus Non-Biting Midges 1
Rheocricotopus Non-Biting Midges 1
Sympotthastia Non-Biting Midges 1
Tanytarsus Non-Biting Midges 1
Neophylax Caddisfly 1
Antocha Crane Fly 1
Tubificidae Aquatic Worm 1
Anchytarsus Beetle 1
Simulium Black Fly 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.