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Aroostook Lowlands

Ecoregion in ME

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The Aroostook Lowlands ecoregion has lower elevations than adjacent Maine ecoregions, with almost no large lakes or ponds. Elevations are generally 400 to 800 feet, with some higher hills. The region has a milder climate than ecoregions 82b, 58v, or 58w. Calcareous bedrock, till, and soils are typical of the ecoregion, developed from the Carys Mills Formation of interbedded pelite and limestone/dolostone. The glacial till and soils are relatively deep, with fine-loamy and coarse-loamy, frigid Spodosols and Inceptisols. Surface water alkalinity and nutrient levels are high. There are some circumneutral cedar swamps and weakly calcareous fens. There is a relatively high woody species richness in this ecoregion compared to the other northern Maine ecoregions (82b, 58v, and 58w). It also contains some calciphiles that do not occur elsewhere in Maine, such as alpine milk-vetch, Fries’ pondweed, Anticosti aster, and hoary willow. Land cover in the region has a high percentage of cropland, mostly of potatoes, but also some oats, hay, peas, buckwheat, and broccoli. More open-land fauna species occur here than in adjacent forested ecoregions.

— EPA

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