Card Set Information
a large, relatively distinct terrestrial region characterized by a similar climate, soil, plants, and animals.
Key Factors in Species Distribution
precipitation (rain shadow)
low water availability (locked in ice)
an ever present layer of ice in the ground
Also known as the taiga
Near 50-60% N of equator
Very shory, cold days in winter
May have permafrost
Annual herbs absent (for the most part)
Mosses and lichens common.
Mild winters with high rainfall and fog.
Occur near ocean
Less seasonality than deciduous forest
evergreen trees common
lower species diversity than rainforest
Temperate Deciduous Forest
Moderate precipitation, evenly distrubuted.
75-250 cm rain/yr
cold, freezing winters
temperature driven annual growth cycle.
-summer herbaceous plants
Rain fall 30-85 cm/yr
hot, wet summers
praries (N Am) or steppes (Asia)
Perennial grasses dominate
: near drought conditions, short grasses.
: moister, tall grasses.
North American grasslands
Asian grassland (and I think S. Am)
30-40 degrees N and S of equator
winter rain, summer grought
fire helps ecosystem
occur in rain shadows
low rainfall (less than 25 cm)
soils are shallow, little organic matter
hot and cold
-annual life history
-succulent life form
-Leaf Adaptations (small leaves, trichomes, thick cuticles)
rainfall 90-150 cm/yr
Deciduous trees are common. Shed leaves in dry season.
Grazing and fire important.
Shrubs and trees sparsely distributed
Relatively constant temperature
most plants are evergreen
high species diversity
intense competition for light
Ex. Costa Rica
use vertical support to get to canopy for light
a plant that grows on another plant
An arid area created by a mountain which contains the precipitation on one side of the mountain, leaving the other arid.