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Desert The driest biome on Earth Desert • Extreme temperaturesVery hot during the day and cool at night Desert • Very little rainfall • Less than 25 cm precipitation yearly Desert • The soil ranges from gravel to sand. • Soil is nutrient poor. Plants of the Desert Desert plants have evolved adaptations to help them survive in the extreme temperatures and dryness of this biome. Examples: •Cactus •Wildflowers •Mesquite •Creosote •Joshua trees •Cactus Plants of the Desert Saguaro Prickly Pear Plants of the Desert •Mesquite Plants of the Desert •Joshua tree Plants of the Desert •Wildflowers Plants of the Desert •Creosote Plants of the Desert Desert plants have evolved adaptations to help them survive in the extreme temperatures and dryness of this biome. FLORA ADAPTATIONS: FLORA ADAPTATIONS: - succulents, store water in their stems or leaves; - some have no leaves or small seasonal leaves that only grow after it rains - leafless plants conduct photosynthesis in their green stems - long root systems spread out wide or go deep into the ground to absorb water; - leaves with hair help shade the plant, reducing water loss - others have leaves that turn throughout the day to expose a minimum surface area to the heat - some have spines to discourage animals from eating plants for water; - waxy coating on stems and leaves help reduce water loss. http://www.mbgnet.net/bioplants/ Animals of the Desert The animals of the desert are adapted to the hot temperatures. Examples: •Lizards •Kangaroo rat •Camels •Gila Monster •Snakes •Predatory birds •Scorpions •Tarantula Animals of the Desert •Lizards Desert Iguana Frilled Lizard Animals of the Desert •Camel Animals of the Desert •Snakes Diamondback Rattlesnake Sidewinder Animals of the Desert •Scorpion Animals of the Desert •Kangaroo rat Animals of the Desert •Gila Monster Animals of the Desert •Predatory birds Great Horned Owl Kestrel Animals of the Desert •Tarantula Animals of the Desert ADAPTATIONS: The animals of the desert are adapted to the hot temperatures. The two main adaptations that desert animals must make are how to deal with lack of water and how to deal with extremes in temperature. - Many desert animals avoid the heat of the desert by simply staying out of it as much as possible. - most desert animals get their water from the food they eat: succulent plants, seeds, or the blood and body tissues of their prey. - Desert animals prevent water leaving their bodies in a number of different ways. - Some, like kangaroo rats and lizards, live in burrows which do not get too hot or too cold and have more humid (damp) air inside. These animals stay in their burrows during the hot days and emerge at night to feed. - Other animals have bodies designed to save water. Scorpions and wolf spiders have a thick outer covering which reduces moisture loss. - The kidneys of desert animals concentrate urine, so that they excrete less water. http://resources.woodlands-junior.kent.sch.uk/homework/adaptations/desert.htm