Presentation Transcript
Slide 1:Biome a major regional terrestrial community with its own type of climate, vegetation, and animal life Ecotone
boundary between two biomes
Slide 3:Tropical Rain Forest
Slide 4:-found near the equator
-temperature varies little from approximately 23°C
-the length of daylight varies from 12 hours by less than one hour
-rainforest>2000mm Tropical Rain Forest
Slide 5:Tropical Rain Forest -canopy trees up to 55 m tall
-largest biome, on an area basis -soils are generally unfertile
-nutrients and carbon stored
in plant biomass, not soils
Slide 6:Tropical Savanna/Seasonal Forest
Slide 7:-found in the tropics (but > 10° latitude)
-pronounced dry season
with <5 cm rainfall in some months Tropical Savanna/Seasonal Forest
Slide 8:Tropical Savanna/Seasonal Forest -scattered trees and grass -fire & grazing by animals
also contribute to
predominance of grasses
Slide 9:Temperate Forest
Slide 10:-distinct winter season,
frost a defining feature
-summer season usually moist with
ppt > evapotranspiration Temperate Forest
Slide 11:Temperate Forest -relatively large tree biomass
-also called the deciduous forest,
but contains evergreen needle trees as well
Slide 12:Temperate Grassland/Shrubland
Slide 13:Temperate Grassland/Shrubland -similar to tropical savanna, but with cold winter
-relatively hot summer
-potential evapotranspiration > ppt
Slide 14:Temperate Grassland/Shrubland -scattered trees and shrubs
-trees are short statured -fire & grazing by animals
also contribute to
predominance of grasses,
but that depends on climate
Slide 15:Desert
Slide 16:Desert -hot or cold deserts exist
-low precipitation ppt
Slide 17:Desert -thorny plants
-other adaptations to conserve water
Slide 18:Chapparal
Slide 19:Chapparal -mild winters
-seasonal rainfall
winter rain, summer drought
-maritime influence
cold ocean currents
continental winds
Slide 20:Chapparal -sclerophyllous plants
-adaptations to fire
Slide 21:Boreal Forest
Slide 22:Boreal Forest -severe winters,
MAT can be < 0 deg C
-ppt is low, but evapo-
transpiration low
-short growing season
Slide 23:Boreal Forest -10-20 m trees
evergreen needle
and deciduous
-second largest biome,
on an area basis -fire dominated, but on longer
timescale than grassland
-more nutrients and carbon
stored in soils than plants
Slide 24:Tundra
Slide 25:-severe winters
-short growing season,
cool summer
-arctic or alpine Tundra
Slide 26:Tundra -no trees
sedges,low shrubs
mosses
-permafrost