Northern tall grasslands
|Northern tall grasslands|
|Biome||Temperate grasslands, savannas, and shrublands|
|Area||76,000 km2 (29,000 sq mi)|
|Countries||United States and Canada|
|States/Provinces||Minnesota, North Dakota, South Dakota and Manitoba|
The Northern tall grasslands is one of 867 terrestrial ecoregions defined by the World Wide Fund for Nature. This ecoregion largely follows the Red River Valley in the Canadian province of Manitoba and the American states of North Dakota and Minnesota.
The Northern tall grasslands have a humid continental climate with moderate precipitation, usually between 450-700mm. Winters here are very cold, with a mean winter temperature of −12.5 °C (9.5 °F), and summers are warm, with a mean temperature of 16 °C (61 °F). The ecoregion's mean annual temperature is 2.5 °C (37 °F).
Dominant grasses include Big Bluestem (Andropogon gerardii), switchgrass (Panicum virgatum) and Indiangrass (Sorghastrum nutans). In wetter areas, trembling aspen (Populus tremuloides) and Bur Oak (Quercus macrocarpa) can be found.
Like other North American prairie ecoregions, the Northern tall grasslands once supported large herds of bison (Bison bison) and elk (Cervus canadensis), which were hunted by the Gray Wolf (Canis lupus) and coyote (Canis latrans). All of these save for the coyote have been largely eliminated from the region, though the bison and wolf are recovering. Other, more common species in the ecoregion include white-tailed deer (Odocoileus virginianus), rabbit (Sylvilagus spp.), ground squirrel (Spermophilus spp.) and large populations of waterfowl.
- Hoekstra, J. M.; Molnar, J. L.; Jennings, M.; Revenga, C.; Spalding, M. D.; Boucher, T. M.; Robertson, J. C.; Heibel, T. J. et al. (2010). Molnar, J. L., ed. The Atlas of Global Conservation: Changes, Challenges, and Opportunities to Make a Difference. University of California Press. ISBN 978-0-520-26256-0.
- "Northern tall grasslands". Terrestrial Ecoregions. World Wildlife Fund. Retrieved 2010-08-20.