Vegetation Classification and Mapping Project Report - USGS
Vegetation Classification and Mapping Project Report - USGS
Vegetation Classification and Mapping Project Report - USGS
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<strong>Vegetation</strong> <strong>Classification</strong> <strong>and</strong> Distribution <strong>Mapping</strong> <strong>Report</strong>: Petrified Forest National Park<br />
44b..<br />
45a..<br />
45b..<br />
46a..<br />
46b..<br />
47a..<br />
47b..<br />
48a..<br />
48b..<br />
49a..<br />
49b..<br />
50a..<br />
50b..<br />
51a..<br />
nated.by.Sporobolus airoides..This.map.class.is.restricted.to.a.few.areas.in.northern.part.of.<br />
the.park.<strong>and</strong>.environs.in.washes.<strong>and</strong>.areas.with.seasonal.stream.flow.<br />
•. Base.map.class:.Copperweed.-.Alkali.Sacaton.Shrubl<strong>and</strong><br />
•. Group.map.class:.Inter-Mountain.Basins.Wash<br />
•. Management.map.class:.Vegetated.Wash.Complex<br />
•. Association:.Iva acerosa.-.Sporobolus airoides.Shrubl<strong>and</strong>.[Park.Special]<br />
The.dominant.shrub.is.not.Iva acerosa..(45a)<br />
.Allenrolfea occidentalis.is.the.dominant.shrub..The.understory.tends.to.be.sparse..This.map.<br />
class.typically.occurs.on.saline.or.alkaline.soils.in.areas.with.periodic.sheet.flow.<br />
•. Base.map.class:.Iodine.Bush.Shrubl<strong>and</strong><br />
•. Group.map.class:.Inter-Mountain.Basins.Greasewood.Flat<br />
•. Management.map.class:.Greasewood.Flats<br />
•. Association:.Allenrolfea occidentalis.Shrubl<strong>and</strong><br />
The.dominant.shrub.not.as.above..(46a)<br />
Sarcobatus vermiculatus.is.the.dominant.or.co-dominant.shrub..(47a)<br />
The.dominant.shrub.is.not.Sarcobatus vermiculatus..(48a)<br />
. Sarcobatus vermiculatus.is.co-dominant.with.the.native.dwarf-shrub.Atriplex obovata..This.<br />
map.class.generally.occurs.on.saline.<strong>and</strong>.alkaline.soils.<strong>and</strong>.in.areas.with.periodic.sheet.flow,.<br />
often.near.a.wash.system.<br />
•. Base.map.class:.Greasewood./.New.Mexico.Saltbush.Shrubl<strong>and</strong><br />
•. Group.map.class:.Inter-Mountain.Basins.Greasewood.Flat<br />
•. Management.map.class:.Greasewood.Flats<br />
•. Association:.Sarcobatus vermiculatus./.Atriplex obovata.Shrubl<strong>and</strong><br />
. Sarcobatus vermiculatus.is.the.dominant.tall.shrub.<strong>and</strong>.the.native.suffrutescent.shrub.Suaeda<br />
moquinii.is.the.dominant.species.in.the.understory..This.map.class.is.generally.restricted.<br />
to.the.alkaline.soils.around.the.Puerco.River.corridor.<br />
•. Base.map.class:.Greasewood./.Shrubby.Seepweed.Shrubl<strong>and</strong><br />
•. Group.map.class:.Inter-Mountain.Basins.Greasewood.Flat<br />
•. Management.map.class:.Greasewood.Flats<br />
•. Association:.Sarcobatus vermiculatus./.Suaeda moquinii.Shrubl<strong>and</strong><br />
. Suaeda moquinii,.a.suffrutescent.shrub,.is.the.dominant.species..This.map.class.is.generally.<br />
restricted.to.the.alkaline.soils.around.the.Puerco.River.corridor..Where.it.occurred,.it.was.<br />
mapped.as.part.of.the.polygon.describing.the.vegetation.surrounding.it.<br />
•. Association:.Suaeda moquinii.Shrubl<strong>and</strong><br />
The.dominant.shrub.is.not.as.above..(49a)<br />
.Either.Ephedra viridis.or.Rhus trilobata.is.the.dominant.shrub,.or.they.are.co-dominant..This.<br />
map.class.tends.to.occur.on.sparse.talus.slopes.or.on.rocky.outcrops.<br />
•. Base.map.class:.Three-leafed.Sumac.-.Mormon.Tea.Talus.Shrubl<strong>and</strong><br />
•. Group.map.class:.Colorado.Plateau.Mixed.Bedrock.<strong>and</strong>.Tablel<strong>and</strong><br />
•. Management.map.class:.Vegetated.Rim.Complex<br />
•. Association:.Rhus trilobata.-.Ephedra.(viridis,.torreyana).Talus.Shrubl<strong>and</strong><br />
The.dominant.shrub(s).are.not.as.above..(50a)<br />
.Zuckia br<strong>and</strong>egeei.is.the.dominant.species..This.map.class.tends.to.occur.in.very.sparse.areas.<br />
on.clay.badl<strong>and</strong>.soils..Other.shrub.<strong>and</strong>.herbaceous.species.may.occur,.but.never.with.high.<br />
cover.<strong>and</strong>.never.as.the.dominant.species.<br />
•. Base.map.class:.Arizona.Siltbush.Sparse.<strong>Vegetation</strong><br />
•. Group.map.class:.Inter-Mountain.Basins.Shale.Badl<strong>and</strong><br />
•. Management.map.class:.Badl<strong>and</strong>.Sparse.<strong>Vegetation</strong><br />
•. Association:.Zuckia br<strong>and</strong>egeei.Sparse.<strong>Vegetation</strong><br />
The.dominant.shrub.not.as.above..(51a)<br />
.Eriogonum leptophyllum.is.the.dominant.species.or.is.an.indicator.species.in.very.sparsely.<br />
E10
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