MBSS Site Summary for: LOGU-106-R-2002

Site Photos

Field photo showing stream conditions at site LOGU-106-R-2002-366 (Opens in a new window) Field photo showing stream conditions at site LOGU-106-R-2002-367 (Opens in a new window) Field photo showing stream conditions at site LOGU-106-R-2002-368 (Opens in a new window)

Located on SWEATHOUSE BR 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 6/12/2002.

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 - 3.3 / 5.0
Benthic IBI Good - 4.3 / 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 745 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 9 %
Agricultural Land Use 59 %
Forested Land Use 32 %


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 19/20 (Optimal)
Velocity/Depth Diversity 14/20 (Suboptimal)
Pool Quality
Pool Extent = 35 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 45 meters 		16/20 (Optimal)
Shading 93 %
Embeddedness 15 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 22.3 ° C
Dissolved oxygen (DO) 7.8 mg/L
pH (lab) 7.61
Conductivity 300 µmho/cm
Alkalinity
(acid neutralizing capacity) 		761.4 µeq/L
Dissolved organic carbon (DOC) 1.8 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 6 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 199
Rosyside Dace 198
Creek Chub 143
White Sucker 100
American Eel 28
Longnose Dace 21
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern Box Turtle
Northern Two-Lined Salamander
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 179
Ephemerella Sulphur Mayfly 14
Prostoia Spring Stonefly 11
Ephemerellidae Spiny Crawler Mayfly 5
Eurylophella Mayfly 4
Orthocladius Non-Biting Midges 3
Parametriocnemus Non-Biting Midges 3
Sympotthastia Non-Biting Midges 3
Amphinemura Spring Stonefly 2
Hydropsyche Net-Spinning Caddisfly 2
Isonychia Slate Drake Mayfly 2
Enchytraeidae Aquatic Worm 1
Chironomidae Non-Biting Midge 1
Corynoneura Non-Biting Midges 1
Diptera True Fly 1
Dubiraphia Riffle Beetle 1
Optioservus Riffle Beetle 1
Ameletidae Minnow Mayfly 1
Cheumatopsyche Net-Spinning Caddisfly 1
Neophylax Caddisfly 1
Antocha Crane 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.