Vegetation Classification and Mapping Project Report - USGS

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Appendix C: Global and local plant community descriptions Most abundant species: Stratum Short.shrub/ sapling Herb.(field) Global species Krascheninnikovia lanata Bouteloua gracilis PEFO species Krascheninnikovia lanata Bouteloua gracilis Other noteworthy species: Global species Bromus tectorum PEFO species Data are not available. References: BIA 1979, Bourgeron and Engelking 1994, Driscoll et al. 1984, Francis 1986, Johnston 1987, Lauver et al. 1999, Muldavin and Mehlhop 1992, Muldavin et al. 1998d, Muldavin et al. 2000b, Soil Conservation Service 1978, Western Ecology Working Group n.d. C41
Vegetation Classification and Distribution Mapping Report: Petrified Forest National Park C.3 Shrubland C.3.11. Krascheninnikovia lanata Dwarf-shrubland Base map class NatureServe common name NatureServe code Krascheninnikovia lanata.Dwarf-shrubland.was.not.mapped. as.a.separate.map.class.because.it.lacked.a.definable. photosignature.and.had.only.one.representative.relevé..This. one.location.was.incorporated.within.the.map.class.Four-wing. Saltbush./.Galleta.Shrubland.. Winter-fat.Dwarf-shrubland CEGL001320 Summary: This association is known from Colorado Plateau west into the Great Basin and northern Mojave Desert and east into the northern panhandle of Texas and is likely to be more widespread in similar habitats in the southwestern Great Plains. It is an alkaline dwarf-shrub association that occurs primarily on sandsheets, slopes, and plains often on eolian deposits near canyon walls and in alkaline flats in and around playas and along washes. Sites are flat to steep (up to 40% slope) and occur between 800 and 1770 m (2620-5800 ft) elevation. Soils are rapidly drained loamy sands or sandy loams derived from alluvium from a variety of parent materials and sandstones that have eroded and been redeposited by wind and water. It occurs on low to high levels of soil salinity and alkalinity. Total vegetation cover ranges from 5 to 45% and is characterized by the dwarf-shrub Krascheninnikovia lanata with cover between 5 and 30%. In southern Nevada, scattered Ambrosia dumosa, Atriplex polycarpa, Larrea tridentata, Lycium andersonii, Sphaeralcea ambigua, and Suaeda moquinii (= Suaeda fruticosa) may be present. The herbaceous layer is poorly developed but may contain tufts of the grass Achnatherum hymenoides. Forbs commonly present include Eriogonum spp., Opuntia polyacantha, Oenothera pallida, Plantago patagonica, and Sphaeralcea parvifolia. Biological soil crusts may provide up to 45% cover. Introduced annuals Bromus tectorum, Bromus rubens, and Salsola tragus may be abundant on some sites. Classification confidence: 3 - Weak. Classification comments: Globally. This is a broadly defined association that includes stands from the Colorado Plateau, Great Basin, and northern Mojave Desert characterized by the dominance of Krascheninnikovia lanata without a notable herbaceous layer. The herbaceous layer is typically absent or sparse or dominated by introduced species such as Bromus tectorum or Salsola tragus. This is a very-small-patch association as presently defined from Lake Meredith National Recreation Area, Texas. The concept will need further review to determine if it is a viable association or should be considered as patches within a broader association. Petrified Forest National Park. Only one relevé was sampled of this association. More samples are needed to fully characterize this association at the park. Vegetation hierarchy: Physiognomic class IV Dwarf-shrubland Physiognomic subclass IV.A. Evergreen.dwarf-shrubland Physiognomic group IV.A.2. Extremely.xeromorphic.evergreen.dwarf-shrubland Physiognomic subgroup IV.A.2.N. Natural/Semi-natural.extremely.xeromorphic.evergreen. dwarf-shrubland Formation name IV.A.2.N.a. Extremely.xeromorphic.evergreen.subdesert.dwarfshrubland Alliance name Krascheninnikovia lanata.Dwarf-Shrubland.Alliance. (A.1104),.Winter-fat.Dwarf-shrubland.Alliance C42
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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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40 Table 13. Base map class summary
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46 Table 16. Summary statistics for
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56 Table 22. Summary statistics for
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Literature Cited ties: Terrestrial
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Appendix C: Global and local plant
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Appendix C: Global and Local Plant
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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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Vegetation Classification and Mapping Project Report - USGS

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