Vegetation Classification and Mapping Project Report - USGS
Vegetation Classification and Mapping Project Report - USGS
Vegetation Classification and Mapping Project Report - USGS
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Vegetation</strong> <strong>Classification</strong> <strong>and</strong> Distribution <strong>Mapping</strong> <strong>Report</strong>: Petrified Forest National Park<br />
C.3 Shrubl<strong>and</strong><br />
C.3.14. Salix exigua / Barren Shrubl<strong>and</strong><br />
Base map class<br />
NatureServe common name<br />
NatureServe code<br />
Coyote.Willow.Shrubl<strong>and</strong><br />
Coyote.Willow./.Barren.Shrubl<strong>and</strong><br />
CEGL001200<br />
Summary:<br />
This riparian shrubl<strong>and</strong> is common in the Rocky Mountains, Colorado Plateau, <strong>and</strong> Great Basin. It is<br />
composed of nearly pure st<strong>and</strong>s of Salix exigua, with few other species. Exposed gravel, cobbles, or<br />
s<strong>and</strong> characterize the ground cover, but an undergrowth of a few, scattered forbs <strong>and</strong> grasses is usually<br />
present. This association occurs within the annual flood zone of rivers on point bars, isl<strong>and</strong>s, s<strong>and</strong> or<br />
cobble bars, <strong>and</strong> streambanks.<br />
<strong>Classification</strong> confidence: 1 - Strong.<br />
<strong>Classification</strong> comments:<br />
Globally. In the western Great Plains this association includes st<strong>and</strong>s composed of intermediates<br />
between Salix interior (= Salix exigua ssp. interior) <strong>and</strong> Salix exigua (= Salix exigua ssp.<br />
exigua) (Dorn 1997, G. Kittel pers. comm. 2001). Until recently these taxa were combined at<br />
the species level (Kartesz 1999). More information on the distribution of introgression between<br />
Salix interior (= Salix exigua ssp. interior) <strong>and</strong> Salix exigua (= Salix exigua ssp. exigua) is<br />
needed to fully underst<strong>and</strong> the ranges of these two species.<br />
Petrified Forest National Park. The understory of this association was sparse but not totally<br />
barren. This association may be better classified under a different association classification.<br />
Currently, the classification is based on pre-existing NVCS association nomenclature <strong>and</strong><br />
might be better classified with additional sampling of Salix exigua communities at Petrified<br />
Forest National Park.<br />
<strong>Vegetation</strong> hierarchy:<br />
Physiognomic class III Shrubl<strong>and</strong><br />
Physiognomic subclass III.B. Deciduous.shrubl<strong>and</strong><br />
Physiognomic group III.B.2. Cold-deciduous.shrubl<strong>and</strong><br />
Physiognomic subgroup III.B.2.N. Natural/Semi-natural.cold-deciduous.shrubl<strong>and</strong><br />
Formation name III.B.2.N.d. Temporarily.flooded.cold-deciduous.shrubl<strong>and</strong><br />
Alliance name<br />
Salix.(exigua, interior).Temporarily.Flooded.Shrubl<strong>and</strong>.<br />
Alliance.(A.947),.(Coyote.Willow,.S<strong>and</strong>bar.Willow).<br />
Temporarily.Flooded.Shrubl<strong>and</strong>.Alliance<br />
Ecological systems placement:<br />
Ecological system unique ID<br />
CES306.821<br />
Ecological system name<br />
Rocky.Mountain.Lower.Montane-Foothill.Riparian.Woodl<strong>and</strong>.<br />
<strong>and</strong>.Shrubl<strong>and</strong><br />
NatureServe conservation status:<br />
Global rank. G5 (15-Jun-2001).<br />
C50
Change language