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Blue Hills

Ecoregion in WI

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The Blue Hills (50f) ecoregion has greater relief and a higher concentration of lakes than most surrounding ecoregions, and it contains lakes with generally lower trophic states than those of adjacent ecoregions to the east, south, and southwest. End moraines, hummocky hills and depressions, along with areas of Precambrian intrusives are common to 50f as compared to the predominantly rocky ground moraines in 50g to the east. Periodic outcrops of pink quartzite have influenced the topography of the region. The Blue Hills ecoregion supports a PNV of hemlock/sugar maple/yellow birch, white pine and red pine forests, a transition from predominantly hemlock/sugar maple/pine forests of ecoregions in the east to sugar-maple/basswood/oak forests, oak forests, and prairie vegetation of ecoregion 51 to the west. 50g. Chippewa Lobe Rocky Ground Moraines. Much of the Chippewa Lobe Rocky Ground Moraines (50g) ecoregion is comprised of productive but rocky soils, scattered wetlands, extensive eskers and drumlins, and outwash plains. Ecoregion 50g has a considerably lower density of lakes that generally have higher trophic states than 50e, 50f, 50i, and 50h. The rocky soils of 50g are a contrast with the well-drained loamy soils in 50f and the sandy soils in 50i. Ecoregion 50g also supports a PNV mosaic of northern mesic forest (hemlock/sugar maple/yellow birch/white and red pine) and wetland vegetation (swamp conifers/white cedar/black spruce), compared to the predominantly red and white pine forest of ecoregion 50i and the lower hemlock component of forests in ecoregions 50f and 50h.

— EPA

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