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Populus fremontii / Sparse Forest | Western Ecology Working Group of...
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Name: Populus fremontii / Sparse Forest Reference: Western Ecology Working Group of... Description: This mature forest association is known only from the San Francisco River watershed, although it likely occurs to a limited extent elsewhere in southwestern New Mexico and southeastern Arizona. It is found within the floodplain of large, lowland valleys at elevations around 1525 m (5000 feet). Sites are typically alluvial terraces that are rarely flooded (25- to 100-year recurrence interval and discharge ratios of 3.6 to 11.2). In keeping with the high landscape position, soils are deep but sandy and relatively dry (sandy and sandy-skeletal Oxyaquic Ustifluvents). Mature <i>Populus fremontii</i> form dense canopies (>60% cover) with only scattered representatives of other floodplain tree species. Although 20 undergrowth species have been recorded for the association, only <i>Baccharis salicifolia</i> and <i>Melilotus officinalis</i> are known to exceed 1% cover. The relatively dry environment combined with shading likely drive the low understory diversity. As a keystone species, the reproduction of <i>Populus fremontii</i> after flooding (and sufficient subsequent base flows) is critical to the sustainability of this community.  Accession Code: VB.CC.32131.CEGL005979 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.737519 NatureServe Explorer   Translated: Fremont Cottonwood / Sparse Forest   Scientific: Populus fremontii / Sparse Forest   Code: CEGL005979