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Northern Lake Michigan Coastal Ecological Landscape

Download the Northern Lake Michigan Coastal chapter [PDF] of the Ecological Landscapes of Wisconsin. This chapter provides a detailed assessment of the ecological and socioeconomic conditions for the Northern Lake Michigan Coastal. It also identifies important planning and management considerations and suggests management opportunities that are compatible with the ecology of the landscape. The tabs below provide additional information.

Landscape at a Glance


Physical & Biotic Environment

Size

2,004 square miles (1,282,877 acres), representing 3.6% of the land area of the State of Wisconsin.

Climate

Cold winters and warm summers are moderated by the thermal mass of Lake Michigan, especially in coastal areas. The mean growing season is 140 days, mean annual temperature is 42.8 deg. F, mean annual precipitation is 32.1, and mean annual snowfall is 46 inches. Lake effect snow can be significant, especially along Lake Michigan. Rainfall and growing degree days are adequate to support agricultural row crops, small grains, hay and pastures. Warmer temperatures near Lake Michigan in fall and early winter and slightly cooler temperatures during spring and early summer are favorable for growing cherries, apples, and other fruits on the Door Peninsula.  Learn more from the chapter [PDF]

Bedrock

Primarily underlain by Silurian dolomite but with some sandstone, also igneous and metamorphic rocks. Generally, the land is covered by a layer of soils of glacial origin; in some places, such as on the Door Peninsula and in the Grand Traverse Islands, the depth to bedrock is only a few feet or less from the surface.  Learn more from the chapter [PDF]

Geology & Landforms

The Niagara Escarpment is a prominent bedrock ridge of Silurian dolomite that is exposed as cliffs and ledges along the western edge of the Door Peninsula and in the Grand Traverse Islands. The same bedrock is also exposed at many locations along the east side of the northern Door Peninsula, where it forms broad, nearly level bedrock shorelines. A broad, level lacustrine plain occurs in areas bordering the west shore of Green Bay, where an extensive delta has been created at the mouth of the Peshtigo River. Landforms along the Lake Michigan shore include beaches, dunes, baymouth bars, and complex ridge and swale topography. Embayment lakes and freshwater estuaries are also characteristic of the Lake Michigan shore. Elsewhere in this Ecological Landscape, ground moraine is the dominant landform.  Learn more from the chapter [PDF]

Soils

Soils are diverse; in some areas, lacustrine sands are found overlying clays, or bedrock which is within a few feet of the surface. On the Door Peninsula soils are calcareous, typically stony loamy sands to loams. Shallow soils and exposures of dolomite bedrock are frequent near the Lake Michigan and Green Bay coasts. Poorly drained sands are common in the lake plain west of Green Bay and in depressions between dunes and beach ridges. Beyond the lake plain west of Green Bay, the ground moraine is composed mostly of moderately well-drained, rocky sandy loams, interspersed with lacustrine sands and clays. Peats and mucks are common along the west shore of Green Bay and in the northwestern part of the Ecological Landscape. There is an area of sandy soils between Stiles and Oconto Falls west of Green Bay. Chambers Island has "sandy, gravelly, clayey soils".  Learn more from the chapter [PDF]

Hydrology

Lake Michigan is cold, deep, oligotrophic, and relatively clean; Green Bay, an estuary that is also the largest bay on Lake Michigan, is warm, shallow, productive, and dynamic. It has been heavily polluted, especially by industries that formerly dumped wastes into the Fox River at the head of the bay (which is within the Central Lake Michigan Coastal Ecological Landscape). The larger rivers that flow through this Ecological Landscape into Green Bay include the Menominee, Oconto, Peshtigo, and Pensaukee. These rivers and their tributaries drain the uplands west of Green Bay before passing through the extensive wetlands along Green Bay's west shore. Several large embayment lakes (e.g., Clark, Europe, and Kangaroo lakes) occur along the east side of the northern Door Peninsula. There are few large inland lakes. Several impoundments constructed on rivers west of Green Bay had been subjected to high levels of pollution from past industrial activity. On the Door Peninsula there have been serious groundwater contamination problems from agricultural pesticides and manure. These pollutants were able to reach the groundwater through the fractured dolomite bedrock. The lower Wolf River drains the westernmost part of this Ecological Landscape.  Learn more from the chapter [PDF]

Current Landcover

Historically, the uplands were almost entirely covered by forest. Today, more than 64% is non-forested. Most of this land is now in agricultural crops (51%), with smaller amounts of grassland (5.6%), non-forested wetlands (6.1%), shrubland 0.1%), and urbanized areas (0.8%). The most abundant cover type in the forested uplands (262,119 acres or 20.4% of the Ecological Landscape) is maple-basswood, with smaller amounts of aspen-birch. Forested wetlands (mostly lowland hardwoods, with some conifer swamps) cover slightly over 14% of the area. Other cover types are comparatively scarce but of high importance ecologically, and include maple-beech, hemlock-hardwoods, white pine, and mixtures of boreal conifers (dominants include white spruce-balsam fir-white pine-white cedar). Important non-forested wetland communities include marsh, sedge meadow, and shrub swamp.  Learn more from the chapter [PDF]

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Socioeconomic Conditions
(based on data from Marinette, Oconto, Shawano, and Door counties)

Population

148,920, 2.7% of the state total

Population Density

39 persons/ sq. mile

Per Capita Income

$29,661

Important Economic Sectors

The largest employment sectors are: tourism-related (14.4%); manufacturing (non-wood) (13.4%), government (12.5%) and retail trade (9.3%) sectors in 2007. Although forestry, agriculture, and development do not have as large an impact on the economy or in the number of jobs they produce, they are the sectors that have the largest impact on the natural resources in the Ecological Landscape.

Public Ownership

Only about 3.5% of the Ecological Landscape is public land. Some of smaller islands are managed by the U.S. Fish and Wildlife Service for colonial nesting birds, as part of the National Wildlife Refuge system. State ownership includes five state parks; four on the Door Peninsula and one in the Grand Traverse Islands, as well as lands administered and/or managed by the DNR's Wildlife Management, Fisheries, and State Natural Areas programs. Door County Parks owns several ecologically significant tracts along the Green Bay and Lake Michigan shores. An extensive area of county forest (Marinette and Oconto counties) occurs near the Green Bay west shore, and another is in the sandy area in Oconto County along the Oconto River. A map showing public land ownership (county, state, and federal) and private lands enrolled in the Forest Tax Programs in this Ecological Landscape can be found at the end of this chapter.

Other Notable Ownerships

The Wisconsin Chapter of The Nature Conservancy has a major conservation project on the Door Peninsula. There are several Land Trusts active in this area, and the Door County Land Trust has a number of active projects.

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Considerations for Planning & Management

The ecosystems of Lake Michigan, Green Bay, and the West Shore wetlands have changed dramatically in a short period of just a few years in recent decades. Conservation plans must be highly adaptive, coordinated, and integrated. Increasing development, skyrocketing land prices, and increasing recreational pressure on a limited land base are placing serious constraints on conservation efforts on the Door Peninsula. Pollutants in Green Bay have created serious management problems, especially for fish and fish-eating birds, and by extension, potentially for humans. The shallow soils and fractured bedrock of the Door Peninsula and Grand Traverse Islands makes sustainable development and water management challenging and expensive. The rapid spread of invasive species over the past several decades is overwhelming managers and agency budgets and is exacerbated by the large number and high mobility of visitors (including tourists, and commercial ships from other parts of the world), especially to the Door Peninsula, Grand Traverse Islands, and Green Bay West Shore. Browse pressure from high populations of white-tailed deer is having negative impacts on many of the native ecosystems and plant communities in this Ecological Landscape, especially on the biologically-diverse Door Peninsula.  Learn more about management opportunities from the chapter [PDF]

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Species

Wisconsin Wildlife Action Plan graphic

Species of Greatest Conservation Need

The following species are listed according to their probability of occurring in the Northern Lake Michigan Coastal Ecological Landscape, based on the findings in Wisconsin's 2015 Wildlife Action Plan.

See the key to association scores [PDF] for complete definitions.


AmphibiansScore
Four-toed SalamanderHemidactylium scutatum2
Mink FrogLithobates septentrionalis1
Pickerel FrogLithobates palustris1

Ants, wasps, and beesScore
Sanderson's Bumble BeeBombus sandersoni2
American Bumble BeeBombus pensylvanicus1
Confusing Bumble BeeBombus perplexus1
Rusty-patched Bumble BeeBombus affinis1
Yellow Bumble BeeBombus fervidus1
Yellowbanded Bumble BeeBombus terricola1

Aquatic and terrestrial snailsScore
Appalachian PillarCochlicopa morseana3
Black StriateStriatura ferrea3
Boreal TopZoogenetes harpa3
Bright GlyphGlyphyalinia wheatleyi3
Cherrystone DropHendersonia occulta3
Deep-throated VertigoVertigo nylanderi3
Dentate SupercoilParavitrea multidentata3
Hubricht's VertigoVertigo hubrichti3
Ribbed StriateStriatura exigua3
Six-whorl VertigoVertigo morsei3
Sculpted GlyphGlyphyalinia rhoadsi2
Transparent Vitrine SnailVitrina angelicae2
Brilliant GranuleGuppya sterkii1
Eastern Flat-whorlPlanogyra asteriscus1

BeetlesScore
A Hydroporus Diving BeetleHeterosternuta wickhami3
A Hydroporus Diving BeetleHeterosternuta pulchra3
A Predaceous Diving BeetleIlybius angustior3
A Predaceous Diving BeetleLioporeus triangularis3
A Predaceous Diving BeetleHygrotus compar3
A Riffle BeetleStenelmis fuscata3
A Riffle BeetleStenelmis antennalis3
Cantrall's Bog BeetleLiodessus cantralli3
Hairy-necked Tiger BeetleCicindela hirticollis rhodensis3
Northern Barrens Tiger BeetleCicindela patruela patruela3
A Predaceous Diving BeetleAgabus discolor2
A Predaceous Diving BeetleHygrotus farctus2
A Minute Moss BeetleHydraena angulicollis1
A Water Scavenger BeetleAgabetes acuductus1
Ghost Tiger BeetleEllipsoptera lepida1
Hairy-necked Tiger BeetleCicindela hirticollis hirticollis1
Sandy Stream Tiger BeetleEllipsoptera macra1

BirdsScore
American WoodcockScolopax minor3
Black TernChlidonias niger3
Black-crowned Night-HeronNycticorax nycticorax3
BobolinkDolichonyx oryzivorus3
Caspian TernHydroprogne caspia3
Common GoldeneyeBucephala clangula3
Common TernSterna hirundo3
Eastern MeadowlarkSturnella magna3
Eastern Whip-poor-willAntrostomus vociferus3
Forster's TernSterna forsteri3
Great EgretArdea alba3
Least FlycatcherEmpidonax minimus3
Northern GoshawkAccipiter gentilis3
Olive-sided FlycatcherContopus cooperi3
Peregrine FalconFalco peregrinus3
Purple MartinProgne subis3
Red-headed WoodpeckerMelanerpes erythrocephalus3
Red-shouldered HawkButeo lineatus3
Upland SandpiperBartramia longicauda3
Vesper SparrowPooecetes gramineus3
American BitternBotaurus lentiginosus2
DickcisselSpiza americana2
Golden-winged WarblerVermivora chrysoptera2
Grasshopper SparrowAmmodramus savannarum2
Henslow's SparrowAmmodramus henslowii2
Loggerhead ShrikeLanius ludovicianus2
Piping PloverCharadrius melodus2
Rusty BlackbirdEuphagus carolinus2
Western MeadowlarkSturnella neglecta2
Yellow RailCoturnicops noveboracensis2
Yellow-headed BlackbirdXanthocephalus xanthocephalus2
American Black DuckAnas rubripes1
Brewer's BlackbirdEuphagus cyanocephalus1
Common NighthawkChordeiles minor1
Evening GrosbeakCoccothraustes vespertinus1
Least BitternIxobrychus exilis1
Rufa Red KnotCalidris canutus rufa1

Butterflies and mothsScore
Phyllira Tiger MothGrammia phyllira2
Semirelict Underwing MothCatocala semirelicta2
Swamp MetalmarkCalephelis muticum2
Gorgone Checker SpotChlosyne gorgone1

Dragonflies and damselfliesScore
Forcipate EmeraldSomatochlora forcipata3
Hine's EmeraldSomatochlora hineana3
Slaty SkimmerLibellula incesta3
Smoky RubyspotHetaerina titia3
Swamp DarnerEpiaeschna heros3
Plains EmeraldSomatochlora ensigera2
Delta-spotted SpiketailCordulegaster diastatops1
Double-striped BluetEnallagma basidens1
Incurvate EmeraldSomatochlora incurvata1
Mottled DarnerAeshna clepsydra1
Pronghorn ClubtailGomphus graslinellus1
Spatterdock DarnerRhionaeschna mutata1
Sphagnum SpriteNehalennia gracilis1
St. Croix SnaketailOphiogomphus susbehcha1
Zigzag DarnerAeshna sitchensis1

FishesScore
Lake SturgeonAcipenser fulvescens3
Shoal ChubMacrhybopsis hyostoma3
Longear SunfishLepomis megalotis2
Redfin ShinerLythrurus umbratilis2
American EelAnguilla rostrata1
Lake ChubsuckerErimyzon sucetta1
Least DarterEtheostoma microperca1
Pugnose ShinerNotropis anogenus1
River RedhorseMoxostoma carinatum1

Grasshoppers and alliesScore
Clear-winged GrasshopperCamnula pellucida3
Club-horned GrasshopperAeropedellus clavatus3
Crackling Forest GrasshopperTrimerotropis verruculata3
Lake Huron LocustTrimerotropis huroniana3
Bruner's Spur-throat GrasshopperMelanoplus bruneri2
Forest LocustMelanoplus islandicus2
Huckleberry Spur-throat GrasshopperMelanoplus fasciatus2
Rocky Mountain Sprinkled LocustChloealtis abdominalis2
Speckled Rangeland GrasshopperArphia conspersa2
Stone's LocustMelanoplus stonei2
Ash-brown GrasshopperTrachyrhachys kiowa1
Blue-legged GrasshopperMelanoplus flavidus1
Delicate Meadow KatydidOrchelimum delicatum1
Grizzly Spur-throat GrasshopperMelanoplus punctulatus1
Spotted-winged GrasshopperOrphulella pelidna1

Leafhoppers and true bugsScore
A LeafhopperLimotettix elegans1

MammalsScore
Big Brown BatEptesicus fuscus3
Northern Flying SquirrelGlaucomys sabrinus3
Water ShrewSorex palustris3
Little Brown BatMyotis lucifugus2
Northern Long-eared BatMyotis septentrionalis2
Silver-haired BatLasionycteris noctivagans2
Woodland Jumping MouseNapaeozapus insignis2
Prairie Deer MousePeromyscus maniculatus bairdii1
Woodland VoleMicrotus pinetorum1

MayfliesScore
A Spiny Crawler MayflyEurylophella aestiva3
A Flat-headed MayflyMaccaffertium pulchellum2
A Small Minnow MayflyParacloeodes minutus2
A Small Minnow MayflyPlauditus cestus1

Mussels and clamsScore
Slippershell MusselAlasmidonta viridis2
BuckhornTritogonia verrucosa1
ElktoeAlasmidonta marginata1
MapleleafQuadrula quadrula1
Purple WartybackCyclonaias tuberculata1
Salamander MusselSimpsonaias ambigua1
SnuffboxEpioblasma triquetra1

ReptilesScore
Wood TurtleGlyptemys insculpta3
Blanding's TurtleEmydoidea blandingii2
Eastern RibbonsnakeThamnophis sauritus1

Rare plants

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.

Scores: 3 = "significantly associated," 2 = "moderately associated," and 1 = "minimally associated."

Scientific Name Common Name Score
Acer pensylvanicum Striped Maple 3
Adlumia fungosa Climbing Fumitory 3
Armoracia lacustris Lake Cress 3
Botrychium lunaria Common Moonwort 3
Botrychium spathulatum Spoon-leaf Moonwort 3
Cakile edentula var. lacustris American Sea-rocket 3
Calamovilfa longifolia var. magna Sand Reedgrass 3
Carex backii Rocky Mountain Sedge 3
Carex capillaris Hair-like Sedge 3
Carex concinna Beautiful Sedge 3
Carex exilis Coast Sedge 3
Carex garberi Elk Sedge 3
Carex livida Livid Sedge 3
Carex platyphylla Broad-leaf Sedge 3
Cirsium pitcheri Pitcher's Thistle 3
Clinopodium arkansanum Low Calamint 3
Coreopsis lanceolata Sand Coreopsis 3
Cypripedium arietinum Ram's-head Lady's-slipper 3
Draba arabisans Rock Whitlow-grass 3
Draba cana Hoary Whitlow-grass 3
Eleocharis quinqueflora Few-flowered Spike-rush 3
Elymus lanceolatus ssp. psammophilus Thickspike 3
Euphorbia polygonifolia Seaside Spurge 3
Festuca occidentalis Western Fescue 3
Galium palustre Marsh Bedstraw 3
Geocaulon lividum Northern Comandra 3
Iris lacustris Dwarf Lake Iris 3
Malaxis monophyllos var. brachypoda White Adder's-mouth 3
Parnassia parviflora Small-flowered Grass-of-Parnassus 3
Primula mistassinica Bird's-eye Primrose 3
Pterospora andromedea Giant Pinedrops 3
Selaginella selaginoides Low Spike-moss 3
Solidago simplex var. gillmanii Dune Goldenrod 3
Tanacetum bipinnatum ssp. huronense Lake Huron Tansy 3
Trichophorum cespitosum Tufted Bulrush 3
Viburnum cassinoides Northern Wild-raisin 3
Viola rostrata Long-spurred Violet 3
Anticlea elegans ssp. glaucus White Camas 2
Asplenium trichomanes Maidenhair Spleenwort 2
Asplenium trichomanes-ramosum Green Spleenwort 2
Bartonia paniculata Twining Screwstem 2
Botrychium campestre Prairie Dunewort 2
Callitriche heterophylla Large Water-starwort 2
Carex merritt-fernaldii Fernald's Sedge 2
Carex sychnocephala Many-headed Sedge 2
Cypripedium parviflorum var. makasin Northern Yellow Lady's-slipper 2
Drosera linearis Linear-leaved Sundew 2
Dryopteris filix-mas Male Fern 2
Eleocharis flavescens var. olivacea Capitate Spike-rush 2
Eleocharis wolfii Wolf Spike-rush 2
Equisetum palustre Marsh Horsetail 2
Galium brevipes Swamp Bedstraw 2
Gymnocarpium robertianum Limestone Oak Fern 2
Leucophysalis grandiflora Large-flowered Ground-cherry 2
Platanthera hookeri Hooker's Orchid 2
Spiranthes lucida Shining Lady's-tresses 2
Stuckenia filiformis ssp. alpina Northern Slender Pondweed 2
Tephroseris palustris Marsh Ragwort 2
Tiarella cordifolia Heartleaf Foamflower 2
Triantha glutinosa False Asphodel 2
Triglochin palustris Slender Bog Arrow-grass 2
Trisetum melicoides Purple False Oats 2
Amerorchis rotundifolia Round-leaved Orchis 1
Aplectrum hyemale Putty Root 1
Asclepias ovalifolia Dwarf Milkweed 1
Astragalus neglectus Cooper's Milkvetch 1
Botrychium minganense Mingan's Moonwort 1
Calypso bulbosa Calypso Orchid 1
Carex formosa Handsome Sedge 1
Carex prasina Drooping Sedge 1
Dryopteris expansa Spreading Woodfern 1
Epilobium strictum Downy Willow-herb 1
Goodyera oblongifolia Giant Rattlesnake-plantain 1
Juglans cinerea Butternut 1
Juncus marginatus Grassleaf Rush 1
Juncus vaseyi Vasey's Rush 1
Petasites sagittatus Sweet Colt's-foot 1
Platanthera flava var. herbiola Pale Green Orchid 1
Polystichum acrostichoides Christmas Fern 1
Ptelea trifoliata ssp. trifoliata var. trifoliata Wafer-ash 1
Ranunculus cymbalaria Seaside Crowfoot 1
Rhynchospora fusca Brown Beak-rush 1
Sceptridium oneidense Blunt-lobe Grape-fern 1
Sceptridium rugulosum Rugulose Grape-fern 1
Sisyrinchium albidum White Blue-eyed-grass 1
Thalictrum revolutum Waxleaf Meadowrue 1
Trillium nivale Snow Trillium 1

Community opportunities

Wisconsin Wildlife Action Plan graphic

Natural community management opportunities

The Northern Lake Michigan Coastal Ecological Landscape contains opportunities to manage for the following natural communities, based on the findings in the 2015 Wildlife Action Plan (originally presented by the Ecosystem Management Team).

See the key to association scores [PDF] for complete definitions.

Natural Community Type Opportunity
Boreal Rich FenMajor
Dry CliffMajor
Emergent MarshMajor
Floating-leaved MarshMajor
Great Lakes Alkaline RockshoreMajor
Great Lakes BeachMajor
Great Lakes DuneMajor
Great Lakes Ridge and SwaleMajor
Lacustrine Mud FlatMajor
Lake MichiganMajor
Northern Mesic Forest--late seralMajor
Northern Sedge MeadowMajor
Northern Wet-mesic ForestMajor
Shrub CarrMajor
Warmwater riversMajor
Warmwater streamsMajor
AlvarImportant
Boreal ForestImportant
Caves and Subterranean CulturalImportant
Clay Seepage BluffImportant
Coolwater streamsImportant
Ephemeral PondImportant
Floodplain ForestImportant
Great Lakes Coastal FenImportant
Interdunal WetlandImportant
Moist CliffImportant
Northern Dry Forest--late seralImportant
Northern Dry Mesic--late seralImportant
Northern Hardwood SwampImportant
Riverine Mud FlatImportant
Southern Sedge MeadowImportant
Submergent MarshImportant
Surrogate GrasslandsImportant
Alder ThicketPresent
Aspen-BirchPresent
Bedrock GladePresent
Black Spruce SwampPresent
Coldwater streamsPresent
Conifer PlantationPresent
Eastern Red-cedar ThicketPresent
Forested SeepPresent
Great Lakes BarrensPresent
Large Lake--deep, hard, drainagePresent
Large Lake--deep, hard, seepagePresent
Large Lake--deep, soft, drainagePresent
Large Lake--deep, soft+, seepagePresent
Large Lake--shallow, hard, seepagePresent
Large Lake--shallow, soft, drainagePresent
Large Lake--shallow, soft, seepagePresent
Northern Tamarack SwampPresent
Northern Wet ForestPresent
Open BogPresent
Poor FenPresent
Riverine Impoundment - ReservoirsPresent
Riverine Lake - PondPresent
Small Lake--hard, bogPresent
Small Lake--otherPresent
Small Lake--soft, bogPresent
Southern Mesic ForestPresent
Spring Pond, Lake--SpringPresent
Springs and Spring Runs (Hard)Present
Springs and Spring Runs (Soft)Present
Wild Rice MarshPresent

General opportunities

General management opportunities 1

The Northern Lake Michigan Coastal Ecological Landscape borders Lake Michigan and Green Bay, encompassing over 200 miles of Great Lakes coast. The shorelines and related habitats, some of them unique to the Great Lakes, are used during the spring and fall by large numbers of migratory birds. In recent years, tens of thousands of diving ducks have been recorded wintering in offshore Lake Michigan habitats. Both Lake Michigan and Green Bay are highly significant for fish.

Large rookeries of colonial fish-eating birds occur on islands in Green Bay and Lake Michigan. Green Bay's low-lying west shore features extensive wetlands of marsh, sedge meadow, shrub swamp and hardwood swamp. The remnant conifer-hardwood forests on the Door Peninsula's margins support diverse populations of breeding birds and are also heavily used by many migrants.

The northern Door Peninsula and associated Grand Traverse Islands present conservation opportunities offered nowhere else in Wisconsin. Unusual physiographic features such as ridge and swale complexes, embayment lakes and freshwater estuaries are rich in rare natural communities, including beach, dune, bedrock shore, coastal fen and boreal forest. These, in turn, support one of Wisconsin's greatest concentrations of rare species, some of them endemic to Great Lakes shoreline environments.

The dolomite Niagara Escarpment is a dominant geological feature of this landscape. On the west side of the Door Peninsula the Escarpment is exposed as cliffs, ledges and talus slopes. Springs and seeps are present, and some of Wisconsin's oldest trees grow on the Escarpment. To the east, along Lake Michigan, the same bedrock forms extensive horizontal rock "beaches."

Scattered features of ecological importance include a stretch of the Menominee River at the northern edge of the landscape; a concentration of rich conifer swamps in the poorly drained terrain east and north of Lake Noquebay; extensive dry forests of aspen, oak and pine on sandy soils in southern Oconto County; warmwater rivers and streams entering Green Bay from the west; and the northernmost stretch of the Lower Wolf River.

Management opportunities vary greatly in different parts of the Northern Lake Michigan Coastal Ecological Landscape because of its variability. The factors responsible for this include the past and present influence of Lake Michigan and Green Bay, the dolomite bedrock, the composition of the glacial till and the highly variable landforms and their effects on land use. Because of this heterogeneity, Landtype Associations, which are fully described in the handbook chapter on the Northern Lake Michigan Coastal Ecological Landscape, can be helpful in identifying, describing and framing management opportunities in greater detail at appropriate locations and at larger scales in this landscape.

1. The text presented here is a summarized version of a longer section developed for the Ecological Landscapes of Wisconsin.

LTAs

Northern Lake Michigan Coastal Landtype Associations

Landtype Associations (LTAs) are units of the National Hierarchical Framework of Ecological Units (NHFEU), a hierarchical ecological land classification system. LTAs are much smaller than Ecological Landscapes, ranging in size from 10,000 and 300,000 acres. In Wisconsin, they are usually based on glacial features like individual moraines or outwash plains. LTAs can be very useful for planning at finer scales within an Ecological Landscape.

The following are the LTAs associated with the Northern Lake Michigan Coastal Ecological Landscape. The Northern Lake Michigan Coastal LTA map [PDF] can be used to locate these LTAs. Clicking on an LTA in the list below will open a data table for that LTA in PDF format. Descriptions are included, where available.

Last Revised: July 16, 2020

Southwest Savanna Southern Lake Michigan Coastal Western Coulees and Ridges Southeast Glacial Plains Central Sand Hills Central Lake Michigan Coastal Central Sand Plains Northern Lake Michigan Coastal Northern Lake Michigan Coastal Northeast Sands Western Prairie North Central Forest Northern Highlands Northwest Lowlands Northwest Sands Northwest Lowlands Superior Coastal Plains Forest Transition