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39 Cards in this Set

  • Front
  • Back
SOUTHERN DESERT Shrub Region
Occurs:
25,000 square miles comprised of:
-Southeastern California
& Portions of:
-Nevada
-Arizona
-Utah
DESERT Grassland Region
Occurs:
Parts of 4 states:
1.California
2.Arizona
3.Texas
4.New Mexico
&
Northern Mexico
Southern Pine Region
Occurs:
Gulf Atlantic Coastal Plains, and the Piedmont of the Eastern & Southern Appalachians
Great Plains Grassland
Occurs:
-spans parts of 13 states
-3 Canadian provinces
-lands under jurisdiction of over 60 Native American tribes
-NE Mexico
Southern Pine Region
Species:
5 Trees:
3 Grasses:
5 Trees:
1.loblolly pine
2.short-leaf pine
3.long-leaf pine
4.Virginia pine
5.slash pine
3 grasses
1.threeawn
2.wiregrass
3.creeping bluestem
Great Plains Grassland
1. TALLGRASS PRAIRIE
4 Grasses:
1.big bluestem
2.little bluestem
3.indiangrass
4.switchgrass
Great Plains Grassland
2. MIXEDGRASS PRAIRIE
4 Grasses:
1.curly mesquite
2.sideoats grama
3.Texas Wintergrass
4.Columbia needlegrass
Great Plains Grassland
3. SHORTGRASS PRAIRIE
3 Grasses
1.buffalograss
2.blue grama
3.wheat
Southern Pine Region
Major impacts:
Intensive use from farming, surface mining etc.. Most of these lands are highly eroded with minimal A1 horizon remaining
Great Plains Grassland
3 forbs or woodies
????
Great Plains Grassland

Why does the vegetation composition change from North to South?
1. Precipitation increase
from west to east.
2. Temperaturegradient;
warmer temps in the
southern region and cooler
temps in the northern
region.
3. Topographic variations and
soil types
4. Fauna
5. grazing management
6. rangeland burning
DESERT Grassland Region
2 Major Deserts:
1. Chihuahuan Desert
2. Sonoran Desert
DESERT Grassland Region
Major species:
6 shrubs or trees
2 grasses
6 shrubs/trees:
1. creosotebush
2. tarbush
3. 4-winged saltbush
4. honey mesquite
5. white bursage
6. wolfberry

2 Grasses:
1. black grama
2. tobosa
DESERT Grassland Region
Major impacts :
-Profoundly modified by 150 years of extensive goat, sheep and cattle use.
-Deep soil sites throughout the natural area, whether derived of igneous rock or limestone, have lost much of their natural plant cover.
-creosote and tarbush, mesquite, acacia and other thorny shrubs have replaced gasses.
SOUTHERN DESERT Shub Region

Major Deserts:
-Mojave Desert
-Sonoran Desert
SOUTHERN DESERT Shrub Region
Major species:
4 Shrubs/trees
2 Grasses
4 Shrubs/Trees
1. creosote bush
2. shadscale
3. big sagebrush
4. blackbush

2 Grasses:
1. alkali sacaton
2. alkali cordgrass
SOUTHERN DESERT Shrub Region
Name of the tree-like yucca
Joshua-tree
SOUTHERN DESERT Shrub Region
Major impacts:
history of:
-livestock grazing
-mining
-military training
*but vehicular routes, coupled with recurrent disturbance along routes that have high rates of vehicular travel and repeated disturbance from regular route maintenance, make vehicular routes the highest form of anthropogenic disturbances.
NORTHERN DESERT Shrub Region
AKA:
sagebrush desert
cold desert
NORTHERN DESERT Shrub Region
Occurs:
1.Nevada
2.California
3.Idaho
4.Wyoming
5.Utah
6.Oregon
Big Horn Basin
NORTHERN DESERT Shrub Region
Major Deserts:
Red Desert
High Desert (lgst in N Am)
NORTHERN DESERT Shrub Region
Major species:
5 Shrubs
5 Grasses
7 Shrubs
1.greaswood
2.winterfat
3.salt desert shrub
4.big sagebrush
5.rabbitbush

5 Grasses
1.bluebunch wheatgrass
2.bottlebrush squirreltail
3.indian ricegrass
4.basin wildrye
5.bluegrasses
NORTHERN DESERT Shrub Region
Characterized by:
widely spaced shrubs that are deeper rooted than grasses of the Great Plains
NORTHERN DESERT Shrub Region
Major Impacts:
Mining activities
overgrazing in the late 1800's and early 1900's
overgrazing by wild horses
urban expansion and highways
NORTHERN DESERT Shrub Region
Vegetation controlled by:
topography
precipitation
soil differences
Southern Pine Region:
Typical successional sequence:
1. annual and perennial weedy forbs and grasses.
2. broomsedge
3. woody invaders
4. southern pines
5. oaks and hickories
Southern Pine Region
Production of:
1. Pine pulp
2. poles
3. sawtimber
Southern Pine Region
Subregions:
1. Virginia pine subregion
2. shortleaf-loblolly pine subregion
3. longleaf-slash pine subregion
4. scrubland subregion
Great Plains Grassland
Why does vegetation composition change from North to South?
-Precipitation increase from
W->E
-Temperature gradient
S->warmer N->cooler
-Topographic variations and
different soil types
-Fauna
-grazing practices
-rangeland burning
Great Plains Grassland
Major impacts:
-diminished water quality
induced by toxins from
industrial & Agricultural
sources & sediments from
poor land management
practices.
-Loss of productivity from
*topsoil erosion
*changes in pH from
irrigation practices
*overgrazing
-Loss of biodiversity
-loss of contiguous landscape
-decliing groundwater
resources from irrigation
-loss of natural areas,
wildlife, & other aesthetic
values.
Southern Pine Region:
Gulf and Atlantic Coastal Plains and the Piedmont of the Eastern and Southern Appalachians
Great Plains Grassland:
Parts of 14 states, 3 Canadian provinces, and lands under jurisdiction of over 60 Native American tribes
Great Plains Grassland:
3 Major Sections
1.Tallgrass Prairie
2.Shortgrass Prairie
3.Mixedgrass Prairie
Great Plains Grassland
Desert Grassland:
1.California
2.Arizona
3.Texas
4.New Mexico
Northern Mexico
Desert Grassland
1.Chihuahuan Desert
2.Sonoran Desert
Southern Desert Shrub:
Arid region of Southeastern California, and portions of Nevada, Arizona, and Utah.
occupies more than 25000 sq mi
Northern Desert Shrub:
1.Nevada
2.California
3.Idaho
4.Wyoming
5.Oregon
Northern Desert shrub vegetation differences