Case Study Sika

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Pages: 2

1) Sika could outcompete the White-tailed deer by eating both the shrubbery that the White-tailed deer eat and the grasses. If they overeat the shrubbery it will kill almost all the White-tailed deer. Sika can also affect other organisms by overeating the grass. By hunting or catching (the humane way but difficult way) and a law to never bring Sika again to the U.S.
2) A number of available resources can affect birth the rate by the amount of food and water needed to keep the baby alive if there is not enough then the baby will die. When we had to try to collect 4 blue poker chips for White-tailed deer and 4 red or blue poker chips to reproduce, although it was hard enough to grab one. A strategy that an organism can use is being territorial
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The White-tail deer growth curve was boom and bust. During the 2nd season, the White-tailed deer jumped really high and probably cause the shrubbery to decrease. Some things that could have to cause the White-tailed deer population to go up by their predator’s population going down. As well as the shrubbery population could have gone up.
5) Sika didn’t eliminate the White-tailed deer because they are nomadic. When resources are scarce they just get up and leave to a new place with more resources. They come back to the original area with their new population.
Conclusion: My hypothesis was: If the Sika get more food than the White-tailed deer will decrease because they must compete for the same food. I accept my initial hypothesis because if the Sika get more resources they have a more likely chance to survive and reproduce over the White-tailed deer. Effects of bringing indigenous species to a foreign environment could be in a direct way is preying on native species, out-competing native species, and preventing native species to reproduce or to kill species young. In an indirect way would be changing the natural food web, lowering biodiversity and altering the ecosystem’s conditions. An example is an Asian carp and the native species in the mid-section of the US. They were introduced by humans to Southern fish farm ponds and spreads to other lakes and