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建立人际资源圈Red_Kangaroo_And_Banskia_Ornata_Relationship
2013-11-13 来源: 类别: 更多范文
Red Kangaroo And Banskia Ornata Relationship
What factors limit the population sizes of the Red Kangaroo and the Banksia Ornata'
The most obvious factor that limits the number of Red Kangaroos is the amount of available food and water. These are the dependent factors. If there is little food and less water, then only Darwins Theory of Survival of the Fittest will come into play. Only those strong enough to survive the hard times will live. In times of drought the populations diminish and in times of plenty the population flourishes. The independent factors that subtract from the roos numbers are humans. Some farmers can consider the roos as menaces because they compete for forage with livestock. In areas where vegetation is limited, kangaroos may significantly reduce the forage available. To prevent this, the farmers shoot the roos to save the livestock. This can also deplete the number of roos.
As for the Banksia Ornata, water is also a necessity for survival. If there is not enough water to maintain the plants necessary functions for survival, they will die. The plants depend on water and sunlight, which is plentiful in Australia, for survival. The
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