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Vegetation Classification and Mapping Project Report - USGS

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Appendix C: Global <strong>and</strong> local plant community descriptions<br />

C.3 Shrubl<strong>and</strong><br />

C.3.9. Iva acerosa - Sporobolus airoides Shrubl<strong>and</strong> [Park Special]<br />

Base map class<br />

NatureServe common name<br />

NatureServe code<br />

Copperweed.-.Alkali.Sacaton.Shrubl<strong>and</strong><br />

Copperweed.-.Alkali.Sacaton.Shrubl<strong>and</strong>.[Park.Special]<br />

Park.Special<br />

Summary:<br />

This Iva acerosa dominated wash association has only been described from Petrified Forest National<br />

Park. Until further inventory is completed, there is no global information.<br />

<strong>Classification</strong> confidence: 3 - Weak.<br />

<strong>Classification</strong> comments:<br />

Globally. Data are not available.<br />

Petrified Forest National Park. This community type was newly described during the<br />

community classification process of this project. Only one relevé was sampled; however, the<br />

unique species composition did not allow this relevé to be placed into any of the existing<br />

NVCS communities. Since we only had one relevé of this unique community type <strong>and</strong> three<br />

relevés in a similar community type during an earlier classification effort (Thomas et al. 2003),<br />

we did not have enough data to develop a new NVCS association. Therefore, this community<br />

type was described as a unique local community type or a park special until further data are<br />

collected.<br />

<strong>Vegetation</strong> hierarchy:<br />

Physiognomic class N/A N/A<br />

Physiognomic subclass N/A N/A<br />

Physiognomic group N/A N/A<br />

Physiognomic subgroup N/A N/A<br />

Formation name N/A N/A<br />

Alliance name<br />

N/A<br />

Ecological systems placement:<br />

Ecological system unique ID<br />

CES304.781<br />

Ecological system name<br />

Inter-Mountain.Basins.Wash<br />

NatureServe conservation status:<br />

Global rank. Data are not available.<br />

Distribution:<br />

Globally. This association has only been described from Petrified Forest National Park. Until<br />

further inventory is completed, there is no global information.<br />

Petrified Forest National Park. Iva acerosa - Sporobolus airoides Shrubl<strong>and</strong> (Park Special)<br />

was sampled at one relevé within Petrified Forest National Park. This relevé was located in a<br />

wash that has periodic streamflow on a bajada-like l<strong>and</strong>form on the southwestern slopes of<br />

Chinde Mesa.<br />

C37

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