IGCSE Physical Geography. Topic Revision Part 2. Ecosystems. An ecosystem is a natural system in which life cycles of plants and animals are closely linked to each other and to the non-living environment (water, air, rocks & soils). Ecosystems can vary in size from Global to Micro.
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4 main biome climates:
(High constant temperatures, High convectional rainfall)
(Seasonal: hot & wet – cooler & dry)
(High annual temp & temp range, high daily temp range, very low rainfall)
(moderate annual temp, temp range & rainfall.
Seasonal: hot dry summers, warm wet winters)
(Luxuriant rainforests with continuous growing seasons.
thin fertile soil layer)
(diverse vegetation from rainforest to savannah ‘xerophytic’ to desert)
(sparse vegetation – drought resistant)
(Originally woodland & scrub – now deforested for agricultural development)
Cone shaped – thick slow moving lava >> steep sided
Shield – runny fast moving lava (basaltic)>> gentle slope