MBSS Site Summary for: LOGU-305-R-2002

Site Photos

Field photo showing stream conditions at site LOGU-305-R-2002-369 (Opens in a new window) Field photo showing stream conditions at site LOGU-305-R-2002-370 (Opens in a new window) Field photo showing stream conditions at site LOGU-305-R-2002-371 (Opens in a new window)

Located on LONG GREEN CR in the Lower Gunpowder Falls watershed, 8-digit code: 02130802.
This stream was visited in the spring on 3/7/2002 and again in the summer on 6/17/2002.

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 Good - 4.0 / 5.0
Benthic IBI Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 5,147 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 2 %
Agricultural Land Use 77 %
Forested Land Use 19 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 6/20 (Marginal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		17/20 (Optimal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 45 %
Embeddedness 90 %
The embeddedness, a measure of silt on the stream bottom, was 90%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 13.9 ° C
Dissolved oxygen (DO) 7.7 mg/L
pH (lab) 7.97
Conductivity 380 µmho/cm
Alkalinity
(acid neutralizing capacity) 		2019 µeq/L
Dissolved organic carbon (DOC) 1.5 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 15 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
White Sucker 420
Creek Chub 150
Blacknose Dace 105
American Eel 37
Tessellated Darter 36
Rosyside Dace 28
Bluegill 13
Cutlip Minnow 13
Common Shiner 8
Swallowtail Shiner 6
Brown Trout 4
Longnose Dace 2
Goldfish 1
Largemouth Bass 1
Potomac Sculpin 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

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

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 12
Parakiefferiella European Non-Biting Midge 10
Micropsectra Non-Biting Midges 10
Dicrotendipes Non-Biting Midges 9
Ephemerella Sulphur Mayfly 9
Orthocladiinae Midge 7
Crangonyx Amphipod 6
Cheumatopsyche Net-Spinning Caddisfly 5
Dubiraphia Riffle Beetle 5
Optioservus Riffle Beetle 5
Tanypodinae Non-Biting Midges 5
Conchapelopia Non-Biting Midges 4
Pisidium Freshwater Pea (Pill) Clam 4
Simulium Black Fly 3
Hydropsyche Net-Spinning Caddisfly 2
Tanytarsini Non-Biting Midges 2
Tvetenia Non-Biting Midges 2
Parametriocnemus Non-Biting Midges 2
Rheosmittia Non-Biting Midges 1
Argia Narrow-Winged Damselfly 1
Cricotopus Non-Biting Midges 1
Microtendipes Non-Biting Midges 1
Diamesa Bloodworm 1
Antocha Crane Fly 1
Caecidotea Isopod 1
Hirudinea Leech 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.