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Biomes

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by

Derrick Hansvall

on 20 February 2013

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Transcript of Biomes

Tropical Rainforest Tundra Precipitation: Less than 25 cm annually
Temperature: summer ranges from 3 to 12º C and winter ranges from -20 to -30º C BIOMES OF THE WORLD Characterized by a thin layer of
permanently frozen soil called
permafrost Plant Adaptations Animal Adaptations No trees can grow here since their roots cannot penetrate the permafrost Short grasses, lichens, flowers and mosses are the only plant species able to survive Include thick coats of fur, extra layers of fat and the ability to hibernate during the cold winter months Temperate
Rainforest Precipitation: More than 200 cm of rainfall per year Temperature: ranges from 5-25º C These regions occur where forest meets coastline, causing ocean winds to drop moisture on mountains Plant Adaptations Trees can grow very tall due to high precipitation Dominated by coniferous trees such as the Douglas fir, Sitka spruce and evergreen Animal Adaptations Most animals live on or near the forest floor so that they are protected from wind and rain Insects also live inside the bark of trees Boreal Forest Precipitation: Between 30 to 85 cm annually (includes lots of snow)
Temperature: Large range between seasons, but known for its subzero winters that can reach -40º C Characterized by a rough terrain
which includes many marshes,
shallow lakes and wetlands Plant Adaptations Coniferous trees that have cones to prevent water loss and to ensure branches don't break off during extreme snowfalls Animal Adaptations Many small mammals burrow during winter to stay warm
Others have thick insulating coats
Few reptiles/amphibians due to the low winter climates Grassland Precipitation: 50-130 cm annually
Temperature: Ranges from 20-30º C Characterized by mainly flat land with
occasional heavy rain followed by an
extended dry period Plant Adaptations Some trees are adapted to survive the harsh period of drought, while others such as acacia have thorns that deter animals from eating them Animal Adaptations Grasslands are home to many grazing animals such as antelope, giraffes and zebras that have specialized teeth for grinding grass These animals have predators such as lions, cheetahs and hyenas Tropical Rainforest Precipitation: About 250 cm annually
Temperature: 20-25º C year-round Animal Adaptations Greatest diversity of animals on Earth, with many of them adapted to living in trees since there is little vegetation on the forest floor Plant Adaptations Trees are adapted to be extra tall so that they can absorb sunlight, while vines and flowers grow on these trees to reach the sunlight The high amounts of precipitation and sunlight allow for maximum diversity of plants and animals Desert Precipitation: Less than 25 cm annually (hot and cold deserts)
Temperature: Ranges from 7-38º C Plant Adaptations Few plant species but cacti with thick, fleshy stems to conserve water are common Animal Adaptations Reptiles have thick skin to prevent water loss, others such as scorpions bury themselves in the ground to escape the heat. Animals are mostly active at night when temperatures are lower Characterized by very little rainfall or lots of rainfall in a short period. Temperate Deciduous Forest Precipitation: Between 75-180 cm annually
Temperature: Ranges from -30º C in the winter to 30º C in the summer Characterized by very noticeable seasonal changes and daily temperature changes Plant Adaptations Deciduous trees shed their leaves in winter which prevents water loss and reduces breakage by heavy snow Animal Adaptations Some birds store seeds in tree hollows, while others migrate to warmer areas during winter
Other animals are hibernators Permanent Ice Precipitation: Less than 50 cm with most falling as snow
Temperature: As low as -89º C!!! Average ranges from 9 to -30º C Characterized by strong winds, little soil and extremely cold temperatures all year round Plant Adaptations Lichens and mosses are among the only plants that can tolerate the cold and grow here Animal Adaptations Many have fat layers or blubber to keep them warm, while others rely on their thick coats of fur. Walruses lie close together with one another to retain heat
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