- Related links
- Printable version
- Contact information
- For information on Wisconsin's natural communities, contact:
- Ryan O'Connor
Natural Heritage Inventory Assistant Ecologist
General natural community overview
Impoundments (also known as reservoirs) are artificially created standing water bodies, produced by dams on streams or rivers. Because of the diverse nature of streams, rivers, and dams, these waterbodies can vary greatly in size, configuration, flow patterns, water chemistry, and biota. Impoundments are nearly as numerous and diverse in characteristics as natural lakes, with larger and more southerly waters having the richest fish faunas. Most often the waterbodies are dominated by warmwater fishes, particularly the family Centrarchidae (sunfishes).
Species of Greatest Conservation Need
The following Species of Greatest Conservation Need are listed according to their level of association with the natural community type, based on the findings in Wisconsin's 2015 Wildlife Action Plan.
Scores: 3 = significantly associated, 2 = moderately associated, and 1 = minimally associated.
|Blanchard's Cricket Frog||Acris blanchardi||3|
|Mink Frog||Lithobates septentrionalis||3|
|Pickerel Frog||Lithobates palustris||2|
|Black Tern||Chlidonias niger||2|
|Forster's Tern||Sterna forsteri||2|
|Caspian Tern||Hydroprogne caspia||1|
|Common Goldeneye||Bucephala clangula||1|
|Common Tern||Sterna hirundo||1|
|Great Egret||Ardea alba||1|
|Least Bittern||Ixobrychus exilis||1|
|Purple Martin||Progne subis||1|
|Yellow-crowned Night-Heron||Nyctanassa violacea||1|
|Dragonflies and damselflies||Score|
|Pronghorn Clubtail||Gomphus graslinellus||3|
|Slaty Skimmer||Libellula incesta||3|
|Double-striped Bluet||Enallagma basidens||2|
|Lilypad Forktail||Ischnura kellicotti||2|
|Mottled Darner||Aeshna clepsydra||2|
|Spangled Skimmer||Libellula cyanea||2|
|Unicorn Clubtail||Arigomphus villosipes||2|
|Alkali Bluet||Enallagma clausum||1|
|Painted Skimmer||Libellula semifasciata||1|
|Smoky Rubyspot||Hetaerina titia||1|
|Lake Sturgeon||Acipenser fulvescens||3|
|Mud Darter||Etheostoma asprigene||3|
|Black Buffalo||Ictiobus niger||2|
|Redfin Shiner||Lythrurus umbratilis||2|
|American Eel||Anguilla rostrata||1|
|Skipjack Herring||Alosa chrysochloris||1|
|Leafhoppers and true bugs||Score|
|A Water Strider||Neogerris hesione||2|
|Big Brown Bat||Eptesicus fuscus||3|
|Little Brown Bat||Myotis lucifugus||3|
|Silver-haired Bat||Lasionycteris noctivagans||2|
|Eastern Pipistrelle||Perimyotis subflavus||1|
|Northern Long-eared Bat||Myotis septentrionalis||1|
|Water Shrew||Sorex palustris||1|
|Mussels and clams||Score|
|Flat Floater||Anodonta suborbiculata||2|
|Blanding's Turtle||Emydoidea blandingii||3|
|Plains Gartersnake||Thamnophis radix||1|
Please see Section 2. Approach and Methods of the Wildlife Action Plan to learn how this information was developed.
The Natural Heritage Inventory has developed scores indicating the degree to which each of Wisconsin's rare plant species is associated with a particular natural community or ecological landscape. This information is similar to that found in the Wildlife Action Plan for animals. As this is a work in progress, we welcome your suggestions and feedback.
|Scientific Name||Common Name||Score|
|Callitriche hermaphroditica||Autumnal Water-starwort||2|
|Callitriche heterophylla||Large Water-starwort||2|
|Nuphar advena||Yellow Water Lily||1|
|Nuphar microphylla||Small Yellow Pond Lily||1|
|Potamogeton bicupulatus||Snail-seed Pondweed||1|
|Potamogeton confervoides||Algae-leaved Pondweed||1|
|Potamogeton diversifolius||Water-thread Pondweed||2|
|Potamogeton oakesianus||Oakes' Pondweed||1|
|Potamogeton pulcher||Spotted Pondweed||1|
|Potamogeton vaseyi||Vasey's Pondweed||2|
|Schoenoplectus torreyi||Torrey's Bulrush||1|
|Utricularia resupinata||Northeastern Bladderwort||1|
The following Ecological Landscapes have the best opportunities to manage for , based on the Ecological Landscapes of Wisconsin Handbook.
|Central Sand Plains||Major|
|North Central Forest||Major|
|Southeast Glacial Plains||Important|
|Central Lake Michigan Coastal||Present|
|Central Sand Hills||Present|
|Northern Lake Michigan Coastal||Present|
|Southern Lake Michigan Coastal||Present|
|Superior Coastal Plain||Present|
|Western Coulee and Ridges||Present|
Major (3 on map)
A major opportunity for sustaining the natural community in the Ecological Landscape exists, either because many significant occurrences of the natural community have been recorded in the landscape or major restoration activities are likely to be successful maintaining the community's composition, structure, and ecological function over a longer period of time.
Important (2 on map)
Although the natural community does not occur extensively or commonly in the Ecological Landscape, one to several occurrences do occur and are important in sustaining the community in the state. In some cases, important opportunities may exist because the natural community may be restricted to just one or a few Ecological Landscapes within the state and there may be a lack of opportunities elsewhere.
Present (1 on map)
The natural community occurs in the Ecological Landscape, but better management opportunities appear to exist in other parts of the state.
What are conservation actions?
Conservation actions respond to issues or threats, which adversely affect species of greatest conservation need (SGCN) or their habitats. Besides actions such as restoring wetlands or planting resilient tree species in northern communities, research, surveys and monitoring are also among conservation actions described in the WWAP because lack of information can threaten our ability to successfully preserve and care for natural resources.
Note: photos are provided to illustrate various examples of natural community types. A single photograph cannot represent the range of variability inherent in a given community type. Some of these photos explicitly illustrate unusual and distinctive community variants. The community photo galleries are a work in progress that we will expand and improve in the future.