MBSS Site Summary for: LPAX-113-R-2000

Site Photos

Field photo showing stream conditions at site LPAX-113-R-2000-07_08 (Opens in a new window) Field photo showing stream conditions at site LPAX-113-R-2000-07_09 (Opens in a new window) Field photo showing stream conditions at site LPAX-113-R-2000-07_10 (Opens in a new window) Field photo showing stream conditions at site LPAX-113-R-2000-07_11 (Opens in a new window) Field photo showing stream conditions at site LPAX-113-R-2000-07_12 (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 7/5/2000.

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 Poor - 1.7 / 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 4,226 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 10.5 %
Agricultural Land Use 50.2 %
Forested Land Use 39.1 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 17/20 (Optimal)
Pool Quality
Pool Extent = 37 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 75 meters 		16/20 (Optimal)
Shading 88 %
Embeddedness 15 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 24.5 ° C
Dissolved oxygen (DO) 9.6 mg/L
pH (lab) 8.7
Conductivity 410 µmho/cm
Alkalinity
(acid neutralizing capacity) 		540.4 µeq/L
Dissolved organic carbon (DOC) 2.4 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 19 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
American Eel 61
Longnose Dace 46
Tessellated Darter 43
White Sucker 38
Fallfish 35
Redbreast Sunfish 26
Margined Madtom 22
Common Shiner 18
Rosyside Dace 17
Cutlip Minnow 16
Green Sunfish 11
Swallowtail Shiner 9
Satinfin Shiner 6
Largemouth Bass 5
Smallmouth Bass 5
Blacknose Dace 2
Eastern Mudminnow 2
Eastern Mosquitofish 1
Sea Lamprey 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad

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
Diamesa Bloodworm 31
Cricotopus/Orthocladius Midge 21
Clinocera Aquatic Dance Fly 17
Simuliidae Black Fly 6
Cheumatopsyche Net-Spinning Caddisfly 6
Stenelmis Beetle 5
Orthocladiinae A Non-Biting Midges 5
Rheocricotopus Non-Biting Midges 5
Rheosmittia Non-Biting Midges 4
Tvetenia Non-Biting Midges 3
Parametriocnemus Non-Biting Midges 3
Corynoneura Non-Biting Midges 3
Naididae Aquatic Worm 2
Thienemanniella Non-Biting Midges 2
Cricotopus Non-Biting Midges 1
Tipulidae Cranefly 1
Optioservus Riffle Beetle 1
Isonychia Slate Drake Mayfly 1
Tanytarsus Non-Biting Midges 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.