Biomes of the World Notes



Based on temperature and precipitation


Ecotones- when two biomes blend into each other

Ecozones- are smaller regions within an ecosystem that shares similar features.

Virtual World Biomes



-rainfall and climate:

-warm, dry, descending air creates desert bands at 30 degrees N and S

-sparse but species-rich community dominated by shrubs and small trees

-dominant plants
        adaptations to conserve water and protect from predation

-dominant animals:


-human disturbances
        slow to recover because of harsh climate



-rainfall and climate:
        seasonal cycles for temperature and precipitation

-located in continental interiors

-dominant plants:
        frequent grass fires

-dominant animals:


-human disturbances
        fire suppression
        conversion into farmland, wind erosion




-rainfall and climate:

-located at far North and South latitudes and high elevations

-dominant plants:

-dominant animals:

-human disturbances
         slow to heal
         oil and natural gas wells in the arctic
         truck ruts and tracks


Boreal forest/Taiga

-rainfall and climate:

-between 45 and 50 degrees North latitude
-many lakes, potholes, bogs, and fens

-dominant coniferous trees:

-dominant animals:


-human disturbances
        timber, turpentine


Broad-Leaved Deciduous Forest:

-rainfall and climate:

-four seasons- requires adaptations for the frozen season

-dominant trees:

-dominant animals:


-human disturbances- most hard hit by man
        trees harvested for timber


Tropical Rain Forest:

cover only 6% of the Earth's surface- about the size of the contiguous US, but houses over 1/2 of the known plant and animal species

-rainfall and climate:

-located near the Equator

-dominant plants:

-dominant animals:


-subtype cloud forests

        high in the mountains
      fog and mist keep vegetation wet

-human disturbance



Aquatic Biomes:



  • Categorized by the salinity (__________) of the water and location


  • abyssal
  • benthic
  • pelagic


  • Coral Reefs
  • Intertidal



  • littoral zone
  • limnetic zone
  • profundal zone

Rivers and Streams


  • an area wet enough to support plants specialized to grow under __________ soil conditions.
  • highly productive and rich in biodiversity- home to many ____________ species
  • provide food and habitat for many species
  • stores floodwater (as does floodplains) and _________ water
  • _____% of the original wetlands are distroyed in US
  • less than 5% of land in US are wetlands
  • swamps have _______, marshes do not