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Pteridium aquilinum - Bromus kalmii Herbaceous Alliance | Midwestern Ecology Working Group...
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Name: Pteridium aquilinum - Bromus kalmii Herbaceous Alliance Reference: Midwestern Ecology Working Group... Description: This alliance is found in northern Wisconsin and in Ontario, Canada. Stands are dominated by ferns, forbs, and graminoids, with tree cover less than 10%. Pteridium aquilinum may form an almost continuous cover of fronds. Graminoid diversity is high, including Bromus kalmii, Danthonia spicata, Elymus trachycaulus, and Poa compressa. Associated forbs include Symphyotrichum ciliolatum (= Aster ciliolatus), Solidago nemoralis, and Fragaria virginiana. Exotic species composition can be high, including Hieracium aurantiacum, Lactuca serriola, Phleum pratense, Poa compressa, Poa pratensis, Rumex acetosella, and Verbascum thapsus (Curtis 1959). Stands of this alliance are most likely modified occurrences of other community types. This alliance occurs on level plains or rolling uplands and in depressions ('frost pockets') in pitted outwash topography. These bracken-dominated grasslands likely originated through fire. Many areas have scattered pine stumps. Stands may have originated after severe slash fires following logging that destroyed or reduced the humus in the soil. In some cases the sites may have originally been Pinus resinosa or Pinus banksiana barrens, where the pines occurred as a sparse layer over the grassland. The bracken grasslands are fairly stable. They are slowly invaded by Populus tremuloides and Abies balsamea, but frost and other factors may slow their invasion.  Accession Code: VB.CC.18195.PTERIDIUMAQUILI Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Pteridium aquilinum - Bromus kalmii Herbaceous Alliance   Translated: Northern Bracken - Kalm's Brome Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.125889 NatureServe Explorer   Code: A.1599