MBSS Site Summary for: NANJ-301-H-2008
Located on NANJEMOY CREEK in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 3/11/2008 and again in the summer on 7/23/2008.
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 - 4.3 / 5.0
|
|
Benthic IBI
|
Good - 5.0 / 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
|
10,417 acres
|
An example of a forested stream.
|
|
Urban Land Use
|
2.2 %
|
|
Agricultural Land Use
|
13.5 %
|
|
Forested Land Use
|
82.1 %
|
Stream Water Quality:
|
| Water temperature |
23.9 ° C
|
| Dissolved oxygen (DO) |
4.1 mg/L
|
|
Dissolved oxygen levels measured in the stream were very low (4.1 mg/L).
Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
|
| pH (lab) |
6.08 |
| Conductivity |
56 µmho/cm
|
Alkalinity
(acid neutralizing capacity)
|
58.5 µeq/L |
| Dissolved organic carbon (DOC) |
8.3258 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.
|
 |
| American Bullfrog |
| Eastern Red-Backed Salamander |
| Gray Treefrog |
| Northern Green Frog |
| Upland Chorus Frog |
|
|
|
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
|
| Genus/Family |
Common Name |
Count |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
20 |
| Stempellinella |
Non-Biting Midges
|
17 |
| Orthocladius |
Non-Biting Midges
|
7 |
| Hydrobaenus |
Midge
|
6 |
| Sphaerium |
Fingernail Clam
|
6 |
| Maccaffertium |
March Brown And Cahill Mayfly
|
5 |
| Polypedilum |
Non-Biting Midges
|
4 |
| Tanytarsus |
Non-Biting Midges
|
4 |
| Tanypodinae |
Non-Biting Midges
|
3 |
| Thienemannimyia Group |
Non-Biting Midges
|
3 |
| Ablabesmyia |
Non-Biting Midge
|
3 |
| Stenacron |
Mayfly
|
3 |
| Tubificidae |
Aquatic Worm
|
3 |
| Hexatoma |
Crane Fly
|
3 |
| Capniidae |
Small Winter Stonefly
|
3 |
| Corynoneura |
Non-Biting Midges
|
2 |
| Lumbriculidae |
Worm
|
2 |
| Tipulidae |
Cranefly
|
2 |
| Gammarus |
Amphipod
|
2 |
| Caecidotea |
Isopod
|
2 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
|
2 |
| Psilotreta |
Mortarjoint Casemaker Caddisfly
|
2 |
| Coenagrionidae |
Narrowwinged Damselfly
|
1 |
| Procladius |
Non-Biting Midge
|
1 |
| Rheocricotopus |
Non-Biting Midges
|
1 |
| Paraphaenocladius |
Non-Biting Midges
|
1 |
| Ironoquia |
Northern Caddisfly
|
1 |
| Perlodidae |
Perlodid Stonefly
|
1 |
| Pisidiidae |
Pill Clam
|
1 |
| Leptophlebia |
Pronggilled Mayfly
|
1 |
| Dubiraphia |
Riffle Beetle
|
1 |
| Elmidae |
Riffle Beetle
|
1 |
| Thienemanniella |
Non-Biting Midges
|
1 |
| Clioperla |
Green-Winged Stonefly
|
1 |
| Chimarra |
Fingernet Caddisfly
|
1 |
| Campeloma |
|
1 |
| Sialis |
Alderfly
|
1 |
| Simuliidae |
Black Fly
|
1 |
| Siphloplecton |
Cleftfooted Minnow Mayfly
|
1 |
| Perlidae |
Common Stonefly
|
1 |
| Polycentropus |
Tube Maker Caddisfly
|
1 |
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.
(Opens in a new window)
(Opens in a new window)
