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The Living World

An ecosystem is a living community of plants and animals which is linked to the natural environment
where they live. Each element in the system depends upon and influences others.

Climatic Summaries:

Tropical rainforest
Hot all year, average temp. 27-30°C
Wet all year, annual precipitation 2000-3000mm


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Only 5% of deciduous forest are left in the UK, why?

Population growth/urbanisation
Farming agriculture- live stock/arable


Found in North Africa, Australia, Mexico and Middle East
Hot all year, no seasons but very cold at night
Soil has no organic content, just rock and sand, often…

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Challenges Water, the region's largest river Lack of water-people have to travel
can no longer meet demands, to find water.
reduced to a trickle by the time it Heat can be hard to live in and
reaches Mexico. extremely cold at night.
Underground aquifers under Las Need food for sheep…

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Adaptations in leaves which are dark green with leathery upper surfaces, oval in shape with
extended points to allow the water to run off.
Parasitic plants growing on tree and tree branches.

The soils in a rainforest are not very fertile. The only layer which is very fertile is…

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Large scale
Forcing out traditional way of life
Bring in diseases, dangerous for indigenous population

Native people living there
Small scale
Replace what they use
Growth in population causes problems with more clearing of the forest
Small scale farming

Cut down trees without replacing them
Destroy animal habitats

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Disruption of nutrient cycling

Human Imapacts

Loss of traditional ways of life
Indigenous people displaced from their lands

Sustainable Management

Selective logging
Only between seven and twelve mature and fully grown trees per hectare are cut down in each
logging cycle. This allows the logged area to regain full…


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