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Chaparral - PowerPoint PPT Presentation

  • Uploaded on Chaparral. (a.k.a. Temperate Shrubland ) Olivia Gehrke. Typically found in coastal regions that are bordered by deserts Ex) southern California Mediterranean.

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(a.k.a. Temperate Shrubland)

Olivia Gehrke

Overview deserts

  • Abiotic

  • Rocky

  • Lots of constant sunlight

  • Many hills

  • Biotic

  • Temperate shrubland

  • Dense growths of

    • Low-growing evergreen shrubs

    • Small trees with leathery leaves (reduce evaporation)

Climate deserts

  • Mild, moist, but doesn’t get a lot of precipitation

    • 10-17 inches per year (mostly in winter)

  • Summer=hot & dry

  • Temperature usually mild but sometimes reaches hot/cold extremes

    • Average range: 30-70 degrees Fahrenheit

Soil deserts

  • Thin, rocky layer on top of subsoil

    • Subsoil consists of clay or rock that holds moisture

      • Needs to hold moisture b/c summers in the chaparral can be very dry

        • Plants use moisture in the soil due to the limited amount of precipitation

Dominant plants
Dominant Plants deserts

  • Blue oak

  • Coyote brush

  • Common sagebrush

  • manzanita

Plant adaptations
Plant Adaptations deserts

  • Chaparral biome is known for having periodic fires, so some plant life has adapted to tolerate the fires.

  • Some plants are fire resistant

    • Coyote brush leaves’ chemical make-up prevents them from catching fire

  • Plants have seeds that mostly sprout following a fire

    • Fire poppy

  • Plants have to adapt to large variations in temperature

    • Blue oak can survive at 100 degrees Fahrenheit for several weeks

Dominant animals
Dominant Animals deserts

  • Black-tailed jackrabbit

  • Grey fox

  • Wild goat

  • Golden jackal

  • Cactus wren

  • Spotted skunk

Animal adaptations
Animal Adaptations deserts

  • Have to be able to cope with fires

    • Cactus wren breed in shrubs freshly recovering from being burned

      • Learned to make use of scorched environment after a fire

  • Black-tailed jackrabbit

    • Able to withstand large variation in temperature; regulates body heat by increasing/decreasing blood flow in their very large ears

    • Feed only at night when it’s cooler

    • Digest food twice; eat their waste in order to get moisture out of it

  • Modified diet for times of limited food sources

    • Golden jackal adapted to eating some insects, even though it’s not part of their normal day-to-day diet

Ecological interactions
Ecological Interactions deserts

  • Birds nest in low-lying, thick shrubs

    • Protective

  • Jackal is predator so keeps rodent and bird population regulated

  • Wild goat also prey of jackal

Human impact problems
Human Impact & Problems deserts

  • Humans build houses in chaparral

    • Dangerous for humans because of the risk of mudslides and fires

    • Also take measures to prevent fires, which some chaparral organisms need to reproduce

  • Though some organisms need fire, most don’t, so careless human behavior causing rapid, long-lasting fires can kill off a lot of non-fire-resistant organisms

    • Too much fire=depletion of chaparral; native species killed; opportunity for invasive species to take over

Sources deserts