▶ Your Answer :The reading and the lecturer both discuss whether a use of the tamarisk beetle is the best way to eliminate the tamarisk tree or not. The reading proposes three disadvantages of the tamarisk beetle. However, the lecturer does not agree with the author’s opinion by saying that it is flawed. ^ Firstly, the reading contends that since people cannot prevent an indiscriminate dispersion of the invasive species, tamarisk beetle, it would be a new threaten to other locations of America. However, the lecturer says that although the tamarisk beetle’s spread is quick, they could not spread so far since the only food of the beetles is the tamarisk trees. Not only this, the tamarisk beetle’s population will be controlled by many predators which will feed on it. ^ Secondly, the reading passage claims that because the tamarisk beetle needs very long time to kill the trees, the trees will absorb a huge amount of water until they become die off. On the other hand, the professor points out that unlike the author’s statement, the beetles have an immediate effect on the trees since they eat all of the tree leaves. Therefore, the tamarisk tree’s photosynthesis rate becomes lower, and they will use much less water because photosynthesis occupies most water usage of the tree. ^ Lastly, the author argues that the risk of huge fire will be higher because of the beetles. This is because when the trees are dead died by the beetles, they will become flammable debris by getting dried. In conclusion, the speaker insists that the risk would not be very severe since the government hasve a lot of experiences of wildfire so that they removes wood debris every year. In addition, if there are too many leaves to remove, the government can cause controlled fire that they can extinguish before it spread to other regions.
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