首页
登录
职称英语
University of York biologist Peter Mayhew recently found that global warming
University of York biologist Peter Mayhew recently found that global warming
游客
2023-08-27
54
管理
问题
University of York biologist Peter Mayhew recently found that global warming might actually increase the number of species on the planet, contrary to a previous report that higher temperatures meant fewer life forms—a report that was his own.
In Mayhew’s initial 2008 study, low biodiversity among marine invertebrates(无脊椎动物)appeared to coincide with warmer temperatures on Earth over the last 520 million years. But Mayhew and his colleagues decided to reexamine their hypothesis, this time using data that were " a fairer sample of the history of life. " With this new collection of material, they found a complete reversal of the relationship between species richness and temperature from what their previous paper argued: the number of different groups present in the fossil record was higher, rather than lower, during "greenhouse phases. "
Their previous findings rested on an assumption that fossil records can be taken to represent biodiversity changes throughout history. This isn’t necessarily the case, because there are certain periods with higher-quality fossil samples, and some that are much more difficult to sample well. Aware of this bias, Mayhew’s team used data that standardized the number of fossils examined throughout history and accounted for other variables like sea level changes that might influence biodiversity in their new study to see if their old results would hold up.
Two years later, the results did not. But then why doesn’t life increasingly emerge on Earth as our temperatures get warmer? While the switch may prompt some to assert that climate change is not hazardous to living creatures, Mayhew explained that the timescales in his team’s study are huge—over 500 million years—and therefore inappropriate for the shorter periods that we might look at as humans concerned about global warming. Many global warming concerns are focused on the next century, he said—and the lifetime of a species is typically one to 10 million years.
" I do worry that these findings will be used by the climate skeptic community to say ’ look, climate warming is fine,’ he said. Not to mention the numerous other things we seem to do to create a storm of threats to biodiversity—think of what habitat(栖息地)destruction, overfishing, and pollution can do for a species’ viability(生存力). Those things, Mayhew explained, give the organisms a far greater challenge in coping with climate change than they would have had in the absence of humans.
" If we were to relax all these pressures on biodiversity and allow the world to recover over millions of years in a warmer climate, then my prediction is it would be an improvement in biodiversity," he said. So it looks like we need to curb our reckless treatment of the planet first, if we want to eventually see a surge in the number of species on the planet as temperatures get warmer. We don’t have 500 million years to wait. [br] Because of the huge timescales in his study, Mayhew believed______.
选项
A、global wanning is not hazardous to living creatures in a short time
B、his study is not suitable to support short-term global warming
C、global warming concerns should be focused on in the next century
D、the lifetime of a species can be extended to 10 million years
答案
B
解析
事实细节题。本题考查梅休对于研究时间跨度太长的态度。定位句指出,梅休解释他们团队的研究时标很长,有5亿多年,所以用于解释人们关注的较短时间内的全球变暖是不合适的,故答案为B)。A)“气候变暖短时间内不会对生物造成威胁”,文中第四段第三句前半部分指出那是气候变化质疑者的断言,故排除;C)“气候变暖的关注点应该集中在下个世纪”,是陈述的事实而不是推测,故排除;D)“一个物种的寿命可以达到1千万年”与题干无直接逻辑关系,故排除。
转载请注明原文地址:http://tihaiku.com/zcyy/2961423.html
相关试题推荐
北京大学于1898年在北京成立,原名为京师大学堂(theImperialUniversityofPeking)。该大学的成立标志着中国近代史上高
AremarkablethinghappenedinNewYorkrecently:thestatelegislature,in
AremarkablethinghappenedinNewYorkrecently:thestatelegislature,in
AremarkablethinghappenedinNewYorkrecently:thestatelegislature,in
AstudyledbyresearchersattheUniversityofPennsylvaniaindicatesthat
AstudyledbyresearchersattheUniversityofPennsylvaniaindicatesthat
AstudyledbyresearchersattheUniversityofPennsylvaniaindicatesthat
Ourgovernmentrecentlyhasfocusedontheimportanceofinvestmentinclean
Ourgovernmentrecentlyhasfocusedontheimportanceofinvestmentinclean
[originaltext]M:DoctorWhite.(19)werecentlylearnedthatalargepieceofth
随机试题
[originaltext]W:Themountainseemstohavegrown,IfeelsodizzywhenIclimb
根据商标法及相关规定,下列商标局可以撤销该注册商标的情形是()。A.注册商标是以
影片《辛德勒的名单》的导演是()A.爱森斯坦 B.黑泽明 C.斯皮尔伯格
下列可以适用《最高人民法院关于审理旅游纠纷案件适用法律若干问题的规定》进行处理的
男婴,6月龄。爷爷奶奶抱来预防接种门诊接种流脑疫苗。经询问符合疫苗接种要求在当日
波长为λ的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为Φ=±π
下列选项中,不属于银行理财产品特征信息的是()。A.风险等级 B.委托币种
钻孔灌注桩施工时,造成钻孔垂直度不符合规范要求的主要原因有()。A.钻机安装不
A.H因子 B.C3 C.Clq D.C5a E.I因子具有趋化作用的是
企业常用的汇总原始凭证包括发出材料汇总表、工资结算汇总表、限额领料单、差旅费报销
最新回复
(
0
)