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Prompt:
Arctic deer live on islands in Canada's arctic regions. They search for food by moving over ice from island to island during the course of the year. Their habitat is limited to areas warm enough to sustain the plants on which they feed and cold enough, at least some of the year, for the ice to cover the sea separating the islands, allowing the deer to travel over it. Unfortunately, according to reports from local hunters, the deer populations are declining. Since these reports coincide with recent global warming trends that have caused the sea ice to melt, we can conclude that the purported decline in deer populations is the result of the deer's being unable to follow their age-old migration patterns across the frozen sea.
Write a response in which you discuss what specific evidence is needed to evaluate the argument and explain how the evidence would weaken or strengthen the argument.
My response:
Admittedly, the environmental issue globalwarming has entered the public's horizon through the past few decades. Thoughthe global temperature rise might well be the blame for a number of climatechanges or species distinctions, the argument would appear unwarranted withoutinsufficient evidence to support the conclusion it eventually arrived at wherethe decrease of the purported decline in deer populations is the result ofglobal-warming's damaging power to their food-hunting paths.
Cited a report from the local hunters, theauthor intended to supplement the global warming trend in order to concludethat the shrinkage of the deer population directly relates to global warming.However, it is necessary to scrutinize the validity of the report as well as toensure that the universal trend of global warming is actually taking effect onthe islands of Canada's arctic regions. Without a perspicuous figureexplanation to the population drop over the past year or past few years, it israther difficult for the readers to grasp an idea of how deteriorated thespecies is. And omitting to set applicable geographic constraints to the globalwarming phenomena, it would keep the curious readers wonder if global warmingwere really compounded on the South Polar but had not really reached Canadayet. In short, failure to provide the above-mentioned data, figure or specificdemonstrations significant lowers the credibility of the author's argument.
Taking a second look at the conclusion theparagraph arrived at last: the decline in deer population is the result ofdeer's being unable to follow their age-old migration patterns across thefrozen sea. What's implied from the line is that the deer have been using thesame strategy and following the same path to search for food for years; manyyears ago, the sea was well frozen by the time they migrate. Therefore, wecould deduce that the sea is melting or melted whose condition is not suitablefor deer to walk on and travel to another Island anymore. Thus, the deer areslowly dying out from starvation. However, the readers might come to andisappointment in searching for support from the paragraph to back up theirdeduction. If the author have provided a pellucid comparison between theancient habitat of the deer and the current on under the impact of globalwarming, his argument would appear much more robust. On the other hand, ifevidence elsewhere shows that the decline of the deer population's decline weredue to over-hunting by the local hunters, the conclusion is under the risk ofbeing completely overthrown.
Therefore, before rushing the conclusion of the cause for thepotential deer distinction in the arctic regions of Canada, the author shouldhave paid more attention to verify the evidence he uses, question himself aboutthe causal relationship he is going to demonstrate and gage the famous theorieshe applies to see if they actually would apply to this specific case. |
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发表于 2012-10-23 13:17:00
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