Vegetation Classification and Mapping Project Report - USGS

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Appendix C: Global and local plant community descriptions Achnatherum hymenoides, Chamaesyce fendleri, Cryptantha crassisepala, Ephedra torreyana, Eriogonum leptocladon, Ipomopsis longiflora, Machaeranthera canescens, Phacelia crenulata, Plantago patagonica, Senecio spartioides, Stephanomeria exigua, and Yucca angustissima. The introduced annual grass Bromus tectorum is common in some stands. Petrified Forest National Park. Four relevés were classified as Artemisia filifolia / Bouteloua eriopoda Shrubland, with total vegetation cover ranging from 28-37% (average 34%). The vegetation cover consisted of a shrub stratum with 9-18% cover (average 13%) and an herbaceous stratum with 16-28% cover (average 22%). The species diversity ranged from 26 and 45 species (average 34 species). The shrub layer was dominated by Artemisia filifolia and ranged from 2 and 6% cover (average 4%). The herbaceous layer was dominated by Bouteloua eriopoda, ranging between 0.5 and 5% cover (average 4%) and Bouteloua gracilis, ranging between 2 and 5% cover (average 4%). Most abundant species: Stratum Global species PEFO species Short.shrub/ Artemisia filifolia Artemisia filifolia sapling Herb.(field) Bouteloua eriopoda, Bouteloua Bouteloua eriopoda, Bouteloua gracilis gracilis Other noteworthy species: Global species Bromus tectorum PEFO species Data are not available. References: Bourgeron and Engelking 1994, Dick-Peddie 1993, Driscoll et al. 1984, Muldavin and Mehlhop 1992, Muldavin et al. 2000b, Sims et al. 1976, Western Ecology Working Group n.d. C19
Vegetation Classification and Distribution Mapping Report: Petrified Forest National Park C.3 Shrubland C.3.3. Artemisia filifolia Colorado Plateau Shrubland Base map class NatureServe common name NatureServe code Sandsage.Colorado.Plateau.Shrubland Sand.Sagebrush.Colorado.Plateau.Shrubland CEGL002697 Summary: This sand sagebrush shrubland association is widespread in the Colorado Plateau of Utah, Arizona, and probably New Mexico. It occurs on sandy, often somewhat disturbed sites on valley floors, stream terraces, stabilized dunes and sandsheets, benches, floodplains, and alluvial fans. Most sites are level to gently sloping, with a few on moderate slopes (up to 21%), and may be oriented to any aspect, although there is a slight tendency toward warmer southerly aspects. Elevations range from 1122 to 1769 m (3680-5803 ft). Sand or bare soil cover most of the unvegetated ground surface, although biological soil crusts may have up to 40% cover. Soils are sandy and derived from local sandstones, alluvium, or eolian deposits. Total vegetation cover ranges broadly, from sparsely vegetated disturbed sites with less than 5% total cover to stable, well-developed communities with more than 50% cover. Regardless of cover, the vegetation is characterized by an open shrub canopy dominated by Artemisia filifolia that is usually mixed with other shrubs, especially Atriplex canescens, Ericameria nauseosa, and Opuntia spp. Less commonly, the shrub layer will include Vanclevea stylosa, Eriogonum leptocladon, or Sarcobatus vermiculatus. Coleogyne ramosissima, Ephedra viridis, and Ephedra torreyana are generally absent or have only trace cover. The herbaceous layer is moderate in terms of species composition and provides sparse to moderate cover. Graminoids that are consistently present include Achnatherum hymenoides and Bromus tectorum; some sites may also have Hesperostipa comata, Pleuraphis jamesii, Sporobolus cryptandrus, and Vulpia octoflora. Forbs vary among sites but are typical of sandy habitats, including Abronia fragrans, Lepidium montanum, Oenothera pallida, Salsola tragus, and Sphaeralcea parvifolia. Cryptogams may be absent or may provide up to 40% cover. Classification confidence: 1 - Strong. Classification comments: Globally. This association is distinguished from other Artemisia filifolia shrubland associations by its restriction to the Colorado Plateau, the somewhat mixed shrub canopy that usually includes Atriplex canescens, a poorly-developed herbaceous layer and often a number of species that indicate disturbance or somewhat alkaline conditions. This association also occurs in a broader range of habitats than other Artemisia filifolia types. However, Artemisia filifolia - Ephedra (torreyana, viridis) Shrubland is poorly defined, and many stands of Artemisia filifolia Colorado Plateau Shrubland contain one or the other species of Ephedra; it is possible that these two associations should be combined. Petrified Forest National Park. Artemisia filifolia Colorado Plateau Shrubland was distinguished from Artemisia filifolia / Bouteloua eriopoda Shrubland by a higher shrub cover and a diverse herbaceous layer that is not dominated by either Bouteloua eriopoda or Bouteloua gracilis. C20
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National Park Service U.S. Departme
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Vegetation Classification and Distr
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The National Park Service, Natural
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Acronyms and Abbreviations AA ac AP
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Executive Summary The classificatio
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Acknowledgments Behind the authors
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Axis 3 Axis 2 Vegetation Classifica
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20 Table 5. continued Plant communi
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Appendix D Plant species list The s
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D3 Appendix D continued Scientific
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Appendix E Plant community and map
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Appendix E: Plant community and map
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Appendix F Plant community and map
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F3 Appendix F continued Plant commu
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Appendix F continued Plant communit
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G4 B1 Cottonwood / Rubber Rabbitbru
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G6 B3 Blue Sage Dwarf-Shrubland Fig
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G8 B5 Copperweed - Alkali Sacaton S
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G10 B7 Drummond Goldenweed - Gallet
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G12 B9 Greasewood / New Mexico Salt
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G14 B11 Iodine Bush Shrubland Figur
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G16 B13 Sandsage Colorado Plateau S
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G18 B15 Tamarisk Shrubland Figure.G
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G20 B17 Winter-fat / Blue Grama Dwa
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G22 B19 Alkali Sacaton - Blue Grama
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G24 B21 Blue Grama Herbaceous Veget
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G26 B23 Galleta - Alkali Sacaton He
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G28 B25 New Mexico Saltbush / Alkal
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G30 B27 Russian Thistle Sand Dune V
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G32 B29 Arizona Siltbush Sparse Veg
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G34 B31 Slender Buckwheat Sparse Ve
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G36 B33 Airstrip Figure.G65..Photos
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G38 B35 Barren Wash Figure.G68..Gro
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G40 B37 Park Sites Figure.G71..Phot
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G42 B39 Residences Figure.G73..Phot
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G44 B41 Run-off Control Feature Fig
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G46 B43 Stock Ponds Figure.G77..Pho
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G48 B45 Vegetated Wash Complex Figu
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Appendix H: Accuracy Assessment Dat
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Table H-4. Contingency table: Manag
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The Department of the Interior prot
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