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
12
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] Why does Mayhew’s team use data that standardized the number of fossils?
选项
A、They realize not all fossils can sample well to represent biodiversity changes.
B、They start to consider the variables that might influence biodiversity.
C、They want to check the previous findings with different research methods.
D、They believe sea level changes can lead to inaccurate fossil records.
答案
A
解析
推理判断题。本题考查梅休团队利用标准化化石的原因。定位句指出,因为某些特定的时段有一些更高质量的化石样本,其中一些更难取出好的样本。基于这一点,梅休团队在他们的新实验中利用标准化个数并被历史所检测的化石数据,故本题答案为A)。B)“他们开始考虑一些可能影响生物多样性的其他变化因素”、C)“他们想用不同的研究方法检验之前的结论”和D)“他们相信海平面变化会导致化石记录的不准确性”,文中第三段最后一句指出,他们只是猜测比如海平面等相关因素会影响生物多样性而想去证实它,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/2961422.html
相关试题推荐
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
Despitethescandalsoverleakede-mails,thescientificevidenceforglobal
随机试题
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
软件文档可分为用户文档和(),其中用户文档主要播过(作答此空)和使用户流。A.
糖尿病患者膳食平衡中蛋白质能量不要多于总能量的()。A.15% B.10%
下列各项中不属于统计行政法规的有()。A.《中华人民共和国统计法实施细则
王女士拟从市场上购买某种证券作为长期投资,目前市场可供选择的证券有:(1)甲公司
在讲授《素描》一课时,高老师先给学生讲述了什么是素描,然后让学生从老师带来的众多
复合地基的增强体穿越了粉质黏土、淤泥质土、粉砂三层土,当水泥掺量不变时,下列哪些
一般地,人的( )在中年之后有下降的趋势A.晶体智力 B.模仿能力 C.创
商业银行在向客户提供理财顾问服务的基础上,接受客户的委托和授权,按照与客户事先
关于无形资产的摊销,下列说法中正确的有()。A.企业获得勘探开采黄金的特许权,且
最新回复
(
0
)