Vegetation Classification and Mapping Project Report - USGS

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Appendix C: Global and local plant community descriptions C.3 Shrubland C.3.18. Suaeda moquinii Shrubland Base map class NatureServe common name NatureServe code Suaeda moquinii.Shrubland.was.not.mapped.as.a.unique. association..The.photointerpreters.were.not.able.to. distinguish.this.association.on.the.aerial.photography.and.had. only.one.ground-sampled.relevé.as.reference..This.association. was.mapped.as.an.inclusion.with.the.surrounding.vegetation;. the.single.relevé.was.included.with.the.Greasewood./.Shrubby. Seepweed.Shrubland.. Shrubby.Seepweed.Shrubland CEGL001991 Summary: These shrublands occur in desert basins or playas in Nevada, Arizona, and southern and eastern California. Sites are generally flat to gently sloping saline valley bottoms, floodplains and playas, saline seeps, and along intermittent washes at elevations ranging from sea level to 1640 m (5381 ft). Soils are deep, saline, alkaline clay loams. The vegetation has a generally sparse shrub layer that is less than 1.5 m tall and strongly dominated by Suaeda moquinii with scattered Atriplex polycarpa, Atriplex canescens, Allenrolfea occidentalis, or Sarcobatus vermiculatus in some stands. The sparse herbaceous layer may include the forbs Bassia hyssopifolia and Salicornia maritima (= Salicornia europaea). Graminoids are not abundant except for Distichlis spicata and occasional Sporobolus airoides or Sporobolus cryptandrus. The adjacent shrublands are dominated by Sarcobatus vermiculatus or Atriplex spp. Classification confidence: 2 - Moderate. Classification comments: Globally. Data are not available. Petrified Forest National Park. Although Distichlis spicata has higher cover than Suaeda moquinii, Suaeda moquinii was determined to be more diagnostic of this community than Distichlis spicata, and a new association based on this one relevé that would include both Suaeda moquinii and Distichlis spicata was not developed due to the paucity of data. Vegetation hierarchy: Physiognomic class III Shrubland Physiognomic subclass III.B. Deciduous.shrubland Physiognomic group III.B.2. Cold-deciduous.shrubland Physiognomic subgroup III.B.2.N. Natural/Semi-natural.cold-deciduous.shrubland Formation name III.B.2.N.c. Intermittently.flooded.cold-deciduous.shrubland Alliance name Suaeda moquinii.Intermittently.Flooded.Shrubland. Alliance.(A.941),.Shrubby.Seepweed.Intermittently. Flooded.Shrubland.Alliance Ecological systems placement: Ecological system unique ID CES304.786 CES304.780 Ecological system name Inter-Mountain.Basins.Playa Inter-Mountain.Basins.Greasewood.Flat NatureServe conservation status: Global rank. G5 (23-Feb-1994). C59
Vegetation Classification and Distribution Mapping Report: Petrified Forest National Park Distribution: Globally. This broadly defined shrubland association occurs in saline overlow areas in bottomlands in the Great Basin, Mojave, Colorado, and Sonoran deserts, and in the southern part of the Great Central Valley of California. The species occurs throughout the western U.S., so this type may be more widespread. Petrified Forest National Park. Suaeda moquinii Shrubland was identified from one relevé along the flats adjacent to the Puerco River in Petrified Forest National Park. Environmental summary: Globally. These shrublands occur in desert basins or playas in Nevada, Arizona, and southern and eastern California. Sites are generally flat to gently sloping saline valley bottoms, floodplains and playas, saline seeps, and along intermittent washes at elevations ranging from sea level to 1640 m (5381 ft). Soils are deep, saline, alkaline clay loams derived from alluvium. Petrified Forest National Park. This association occurred at an elevation of 1640 m (5381 ft). The site was a flat, intermittently flooded area adjacent to the Puerco River. USFWS wetland system: Lacustrine. Vegetation description: Globally. This association is characterized by a sparse to open shrub layer less than 1.5 m tall that is strongly dominated by Suaeda moquinii sometimes with scattered Atriplex polycarpa, Atriplex canescens, Allenrolfea occidentalis, or Sarcobatus vermiculatus. The sparse herbaceous layer may include the forbs Bassia hyssopifolia and Salicornia maritima (= Salicornia europaea). Graminoids are not abundant except for Distichlis spicata and occasional Sporobolus airoides or Sporobolus cryptandrus. Petrified Forest National Park. Only one relevé was classified as Suaeda moquinii Shrubland, with total vegetation cover of 17%. This vegetation cover consisted of 2% cover in the shrub stratum and 15% cover in the herbaceous stratum. The species diversity was low with only four species. The shrub layer was dominated by Suaeda moquinii with 6% cover, and the herbaceous layer was dominated by Distichlis spicata with 8% cover. Most abundant species: Stratum Global species PEFO species Short.shrub/ Suaeda moquinii Suaeda moquinii sapling Herb.(field) Distichlis spicata Distichlis spicata Other noteworthy species: Global species Data are not available. PEFO species Data are not available. References: Bourgeron and Engelking 1994, Donnelly et al. 2006, Driscoll et al. 1984, Faden 1977, NVNHP 2003, Western Ecology Working Group n.d. C60
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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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B2 Appendix B Plant Community 2003
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B4 Appendix B .continued Plant Comm
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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 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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