MBSS Site Summary for: NANJ-331-S-2011
Located on MILL RUN in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 3/9/2011 and again in the summer on 6/15/2011.
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 - 3.0 / 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
|
6,272 acres
|
An example of a forested stream.
|
|
Urban Land Use
|
2.7 %
|
|
Agricultural Land Use
|
20.4 %
|
|
Forested Land Use
|
75.4 %
|
Stream Water Quality:
|
| pH (lab) |
6.36 |
Alkalinity
(acid neutralizing capacity)
|
57 µeq/L |
| Dissolved organic carbon (DOC) |
4.4333 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.
|
 |
| Eastern American Toad |
| Eastern Cricket Frog |
| Fowler's Toad |
| Northern Green Frog |
| Northern Spring Peeper |
| Orconectes limosus |
| Procambarus clarkii |
| Japanese Stiltgrass |
| Multiflora Rose |
|
|
|
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
|
| Genus/Family |
Common Name |
Count |
| Isoperla |
Stripetail Stonefly
|
20 |
| Hydrobaenus |
Midge
|
10 |
| Siphlonurus |
Gray Drake Mayfly
|
9 |
| Thienemannimyia Group |
Non-Biting Midges
|
8 |
| Tanypodinae |
Non-Biting Midges
|
7 |
| Prostoia |
Spring Stonefly
|
7 |
| Caecidotea |
Isopod
|
7 |
| Triaenodes |
Long-Horned Caddisfly
|
6 |
| Prosimulium |
Black Fly
|
3 |
| Orthocladius |
Non-Biting Midges
|
3 |
| LUMBRICULIDAE |
Worm
|
3 |
| Optioservus |
Riffle Beetle
|
3 |
| EPHEMERELLIDAE |
Spiny Crawler Mayfly
|
2 |
| LEPTOPHLEBIIDAE |
Pronggilled Mayfly
|
2 |
| Macronychus |
Riffle Beetle
|
2 |
| Ephemerella |
Sulphur Mayfly
|
2 |
| Rheotanytarsus |
Non-Biting Midges
|
2 |
| Nanocladius |
Non-Biting Midges
|
2 |
| Sympotthastia |
Non-Biting Midges
|
2 |
| Stempellinella |
Non-Biting Midges
|
1 |
| Tanytarsus |
Non-Biting Midges
|
1 |
| Neoporous |
Predaceous Diving Beetle
|
1 |
| TAENIOPTERYGIDAE |
Winter Stonefly
|
1 |
| Amphinemura |
Spring Stonefly
|
1 |
| Parametriocnemus |
Non-Biting Midges
|
1 |
| Synurella |
Amphipod
|
1 |
| Helichus |
Beetle
|
1 |
| Stenelmis |
Beetle
|
1 |
| Ablabesmyia |
Non-Biting Midge
|
1 |
| Procladius |
Non-Biting Midge
|
1 |
| Diplocladius |
Non-Biting Midges
|
1 |
| Paraleptophlebia |
Blue Quill Mayfly
|
1 |
| Neophylax |
Caddisfly
|
1 |
| Strophopteryx |
Early Brown Stonefly
|
1 |
| Prostoma |
Freshwater Nemertean (Ribbon Worm)
|
1 |
| Nigronia |
Megaloptera (Dark Fishfly)
|
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)
