Vegetation Classification and Mapping Project Report - USGS

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Appendix C: Global and local plant community descriptions Ecological systems placement: Ecological system unique ID CES304.775 CES304.765 CES304.788 Ecological system name Inter-Mountain.Basins.Active.and.Stabilized.Dune Colorado.Plateau.Mixed.Bedrock.Canyon.and.Tableland Inter-Mountain.Basins.Semi-Desert.Shrub-Steppe NatureServe conservation status: Distribution: Global rank. GNR (14-Apr-2003). Globally. This association has been documented from widely scattered sites in southern Utah, northern Arizona, from the upper Rio Puerco watershed in northern New Mexico (Francis 1986), Petrified Forest National Park in northeastern Arizona, and is likely to occur across the central part of the Colorado Plateau. Petrified Forest National Park. Ericameria nauseosa / Bouteloua gracilis Shrub Herbaceous Vegetation was identified from two relevés on sand dunes/sandsheets and on a talus surface within Petrified Forest National Park. They were located south of Newspaper Rock and south of The Haystacks. Environmental summary: Globally. This shrub herbaceous association occurs on valley floors, swales and alluvial flats in the central part of the Colorado Plateau. Stands occupy gentle to moderate slopes (2-13%) between 1635 and 2010 m (5360-6600 ft) elevation. Aspect does not control the distribution of this association. Litter and bare soil cover most of the unvegetated surface. Parent materials are variable and include sandstones and shale that have eroded and been re-deposited as alluvium or windblown sediments. Soils are well-drained and fine-sandy or silty in texture. Petrified Forest National Park. This association occurred at 1635 and 1640 m (5360-5380 ft) elevation. Slopes were minimal (2-4%). USFWS wetland system: Not applicable. Vegetation description: Globally. The total vegetation cover ranges from 10 to 65%, roughly equally divided between the shrub and herbaceous layers. The vegetation is characterized by a short-shrub canopy of Ericameria nauseosa that ranges in cover from 5 to 25% and an understory dominated by Bouteloua gracilis that ranges in cover from 5 to 35%. Other shrubs may be present with very low cover, including Tetradymia canescens, Atriplex canescens, Atriplex confertifolia, Gutierrezia sarothrae, and Opuntia polyacantha. Associated graminoids present include the bunch grasses Achnatherum hymenoides, Aristida purpurea, Pascopyrum smithii, Sporobolus airoides, Sporobolus cryptandrus, and Muhlenbergia pungens. Only scattered forbs are present, such as Chaetopappa ericoides, Ipomopsis longiflora, and Senecio spartioides. Petrified Forest National Park. The two relevés classified as Ericameria nauseosa / Bouteloua gracilis Shrub Herbaceous Vegetation had total vegetation cover of 23 and 24%. This vegetation cover was composed of 8 and 9% cover in the shrub stratum and 14 and 16% cover in the herbaceous stratum. The species diversity was 35 and 36 species. The shrub layer was dominated by Ericameria nauseosa with low shrub cover of 1 and 3%; the herbaceous layer was dominated by Bouteloua gracilis with 1 and 5% cover. C79
Vegetation Classification and Distribution Mapping Report: Petrified Forest National Park Most abundant species: Stratum Global species PEFO species Short.shrub/ Ericameria nauseosa Ericameria nauseosa sapling Herb.(field) Bouteloua gracilis Bouteloua gracilis Other noteworthy species: Global species Data are not available. PEFO species Data are not available. References: Francis 1986, Hansen et al. 2004a, Western Ecology Working Group n.d. C80
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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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40 Table 13. Base map class summary
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56 Table 22. Summary statistics for
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Literature Cited ties: Terrestrial
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B2 Appendix B Plant Community 2003
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Appendix C: Global and local plant
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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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