‘the Characteristics of the Vegetation of Tropical Biome Are More the Outcome of Continued Human Activity Than a Response to the Climatic Conditions’ Essay

1703 WordsJan 7, 20157 Pages
‘The characteristics of the vegetation of tropical biome are more the outcome of continued human activity than a response to the climatic conditions’ With reference to the tropical biome, discuss the extent to which you agree with this view. (40 marks) The tropical rainforest is a biome with a constant temperature 80-90oC and a high amount of rainfall at 2m per year. The level of humidity and density of the vegetation give the ecosystem a unique water and nutrient cycle. Rainforests around the world are threatened by human expansion, in the last 40 years 20% of the Amazon rainforest has been removed due to human activity. A tropical rainforest biome is found in hot, humid environments in equatorial climates. They contain the most diverse range and highest volume of plant and animal life found anywhere on earth, with over a quarter of the world’s animal species.In general, tropical rainforests have hot and humid climates where it rains almost every day. The level of rainfall depends on the time of year. Temperatures vary through the year but much less than the rainfall. Rainforest ecosystems are characterised by heavy convectional rainfall, this is the rainfall that occurs in warm or tropical climates when heated air rises and cools, high humidity, and this is the amount of water vapour in the atmosphere, the abundance of vegetation and nutrient-rich but shallow soil. These factors combined give rise to a unique water and nutrient cycle. Heavy rainfall, warm temperatures and constant sunlight provides the optimum conditions for plant growth; however the much of the sunlight is blocked by the canopy formed from trees. Many plants develop immediately in-between gaps in the canopy resulting in the tropical rainforest’s dense vegetation covering 1.4 billion acres. From ground level up these levels of vegetation are: The shrub layer. On this layer it is very dark with
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