MBSS Site Summary for: CONO-302-R-2009

Site Photos

Field photo showing stream conditions at site CONO-302-R-2009-1 (Opens in a new window) Field photo showing stream conditions at site CONO-302-R-2009-2 (Opens in a new window)

Located on Rockdale Run in the Conococheague Creek watershed, 8-digit code: 02140504.
This stream was visited in the spring on 4/27/2009 and again in the summer on 6/30/2009.

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 N R
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 6,861 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 6.8 %
Agricultural Land Use 74.3 %
Forested Land Use 18.4 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 8.3
Alkalinity
(acid neutralizing capacity) 		4144.7 µeq/L
Dissolved organic carbon (DOC) 1.0563 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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
Orconectes virilis

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Gammarus Amphipod 31
Ephemerella Sulphur Mayfly 22
Orthocladius Non-Biting Midges 13
Stenelmis Beetle 12
Optioservus Riffle Beetle 8
Tvetenia Non-Biting Midges 5
Girardia Freshwater Flatworm 4
Diphetor Mayfly 4
Maccaffertium March Brown And Cahill Mayfly 2
Baetis Blue-Winged Olive Mayfly 2
Antocha Crane Fly 2
Baetidae Small Minnow Mayfly 2
Amphinemura Spring Stonefly 1
Polypedilum Non-Biting Midges 1
Thienemannimyia Group Non-Biting Midges 1
Psychomyia Trumpet-Net Caddisfly 1
Cheumatopsyche Net-Spinning Caddisfly 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.