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ENVIORNMENTAL REGIONS (ENVIORNMENTAL REGIONS (ECOSYSTEM (4)multiple…

- - - - desertification
        
        Evolution methods are mining, energy generation, farming, tourism
        
        Population growth (an increasing population growth has a greater pressure on the environment )
        Removal of wood
        soil errosion
        cliamate change
      - vegetation
        
        They have waxy leaves / surfaces to reduce water loss by transpiration
        Plants known as succulents store water in their leaves
        
        They have tap roots as long as 7-10 m long deep under the ground. Sometimes plants have spine instead of leaves
        
        Plants with adaptation to live in hot and dry climates are called xerophytic
        They usually have small leafs to make sure less water is lost
      - cliamate
        
        Soil is thin , sandy and generally grey
        Rain water is soaked up quickly
        Appearance is sandy due to left up salts by evaporated waters
        
        Climate is very dry with less than 250mm of rainfall in a year
        
        Very hot-SUMMER: day temp can exceed 40C
        night temp can go below 0 C
        WINTER temp drops below freezing point
    - - places
        
        Places
        1)Grand Basin Desert
        2)Atacama Desert
        3)Arabian Desert
        4)Kalahari Desert
        5) Great Indian Desert
        6)Chiuahuan Desert
        7)Australian Desert
        8)Sonoran Desert
      - vegetation
        
        Irregular rains in summer make this a hard place for the plants to live in
        
        Natural vegetation is woodland and scrubs which have lain dormant during summer heat i.e they pull out new shoots and begin to fly
        
        Plants have adapted to staying in the high heat region , eg: long roots , thick barks , waxy leafs ,
        
        Mediterranean vegetation has had to adapt to hot, dry summers and wet winters. It has been affected by human activities such as the felling and burning of forest and the keeping of grazing animals
      - cliamate
        
        Found on the west coasts of a continent Between 30-40 N/S
        
        Prevailing wind wind blows from the land during summer(this time the land is hot)
        During winter the pw blows from the opposite directions
        
        Hot & dry summers, warm & wet winters
    - - animals
        
        unique animals:
        african elephant(western, central Africa)
        jaguar (RF of South Africa)
        poison dart frog
        green anaconda (central, South America)
        golden toad (dead)(Costa Rica)
        African grey parrot
        king vulture
        
        home to many endandangered animals,
        due to habitat loss
      - vegetation
        
        exploitation
        
        *forest has 100s of species in a small area thus exploitation is hard
        
        *hard wooded trees, heavy logs don't float on water
        
        *dense forest, wet+swamp ground
        
        divided in layers namely:
        emergent layer
        canopy layer
        understory layer
        forest floor
        
        mahogany, ebony, greenheart &
        redwood are a few major trees
        
        tress as tall as 150ft+
        (for sunlight)
        
        densest tropical rainforest known as selves
      - climate
        
        heavy rainfall, between 150-350 cm
        no distinct seasons
        4 O'clock showers
        common sickness- yellow fewer, malaria,sleeping sickness
        
        High avg humidity due to high evaporation
        avg humidity is 85-95%
        
        Temperature is high between 30-55C
        Little variation between night and day