BIOMES
Tropical Rain Forests
Located near equator
Constant high temp and rainfall all year
Highest biodiversity (total num...
BIOMES
Taiga
Largest biome on earth*
Long cold winters
Trees: mostly conifers (narrow, waxy needles to reduce water evapor...
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Biomes: USE THIS HANDOUT WITH LECTURE 15

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Biomes: USE THIS HANDOUT WITH LECTURE 15

  1. 1. BIOMES Tropical Rain Forests Located near equator Constant high temp and rainfall all year Highest biodiversity (total number of species) than ANY other biome* Tall trees (canopy): keep their leaves all year Many animals live in trees HUMAN IMPACT: forests cut for lumber, burned clear for farming. 50% of world’s rain forests ALREADY GONE!* Temperate Deciduous Forests Most rainfall in summer Trees, little grass: Trees shed leaves in winter* Insects/Arthropods numerous HUMAN IMPACT: hunting and habitat loss, clearing for lumber Savanna Grasslands, few trees Rainy seasons Most diverse group of large mammals on earth live here* HUMAN IMPACT: Overgrazing on savanna can convert it to desert (desertification), poaching results in extinction or endangered species Grasslands/Prairies Located in center of continents Continuous cover of grass Frequent droughts prevent most trees from growing HUMAN IMPACT: Only 1% remains after most has been converted to farmland or destroyed due to overgrazing Chaparral Found in coastal regions that border deserts Nearly all rainfall in winter Hot/Dry summers Plants are shrubs and small trees Deserts Rainfall 10 inches or less annually Defined more by lack of water than by temp Present on all continents Wide spaced vegetation, large areas of bare ground Cacti are especially adapted to survive (shallow roots, thick stems, spines that protect them from predators and preserve water)
  2. 2. BIOMES Taiga Largest biome on earth* Long cold winters Trees: mostly conifers (narrow, waxy needles to reduce water evaporation) Large mammals, breeding grounds for many birds HUMAN IMPACT: clear-cutting for papermaking Tundra Treeless region between taiga and polar ice cap Less than 10 inches precipitation per year Permafrost: permanently frozen layer of soil* Ground covered with small flowers, moss Summer marshes HUMAN IMPACT: oil drilling, pipelines

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