首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
There are both great similarities and considerable diversity in the ecosystems that evolved on the islands of Oceania in and aro
There are both great similarities and considerable diversity in the ecosystems that evolved on the islands of Oceania in and aro
admin
2022-07-08
75
问题
There are both great similarities and considerable diversity in the ecosystems that evolved on the islands of Oceania in and around the Pacific Ocean. The islands, such as New Zealand, that were originally parts of continents still carry some small plant and animal remnants of their earlier biota (animal and plant life), and they also have been extensively modified by evolution, adaptation, and the arrival of new species. By contrast, the other islands, which emerged via geological processes such as volcanism, possessed no terrestrial life, but over long periods, winds, ocean currents, and the feet, feathers, and digestive tracts of birds brought the seeds of plants and a few species of animals. Only those species with ways of spreading to these islands were able to undertake the long journeys, and the various factors at play resulted in diverse combinations of new colonists on the islands. One estimate is that the distribution of plants was 75 percent by birds, 23 percent by floating, and 2 percent by wind.
The migration of Oceanic biota was generally from west to east, with four major factors influencing their distribution and establishment. The first was the size and fertility of the islands on which they landed, with larger islands able to provide hospitality for a wider range of species. Second, the further east the islands, generally the less the species diversity, largely because of the distance that had to be crossed and because the eastern islands tended to be smaller, more scattered, and remote. This easterly decline in species diversity is well demonstrated by birds and coral fish. It is estimated that there were over 550 species of birds in New Guinea, 127 in the Solomon Islands, 54 in Fiji, and 17 in the Society Islands. From the west across the Pacific, the Bismarck Archipelago and the Solomon Islands have more than 90 families of shore fish (with many species within the families), Fyi has 50 families, and the Society Islands have 30.
Third, the latitude of the islands also influenced the biotic mix, as those islands in relatively cooler latitudes, notably New Zealand, were unsuited to supporting some of the tropical plants with which Pacific islands are generally associated.
Finally, a fourth major factor in species distribution, and indeed in the shaping of Pacific ecosystems, was wind. It takes little experience on Pacific islands to be aware that there are prevailing winds. To the north of the equator these are called north-easterlies, while to the south they are called south-easterlies. Further south, from about 30° south, the winds are generally from the west. As a result on nearly every island of significant size there is an ecological difference between its windward and leeward (away from the wind) sides. Apart from the wind action itself on plants and soils, wind has a major effect on rain distribution. The Big Island of Hawaii is often cited as a prime example; one can leave Kona on the leeward side in brilliant sunshine and drive across to the windward side where the city of Hilo is blanketed in mist and rain.
In Paragraph 2, what is the author’s purpose in mentioning the estimated numbers of bird species on various Oceanic islands?
选项
A、To give examples of the wide range of species that can be found on Oceanic islands.
B、To demonstrate how much knowledge about Oceanic species has been accumulated.
C、To illustrate the decline in species diversity from west to east on Oceanic islands.
D、To identify the influence of latitude upon Oceanic plants and animals.
答案
C
解析
题目问作者为什么要提到不同大洋洲岛屿上鸟类的数量。第2段第4句提到“鸟类和珊瑚鱼很好地证明了越向东,生物多样性越少这种情况”,接下来的例子是为了验证这句话,故正确答案为C项。A项“为了证明大洋洲岛屿上物种的多样性”、B项“为了证明人类已经积累了大量大洋洲岛屿物种的知识”、D项“解释纬度对大洋洲动植物的影响”均不是作者提到不同大洋洲岛屿上鸟类的数量的原因。
转载请注明原文地址:https://kaotiyun.com/show/U7MO777K
本试题收录于:
CATTI二级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI二级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
Whichofthefollowingistrueaccordingtothespeaker?
WelcometotheChineseConsulate-GeneralinMelbourneforthe"ChineseCultureDay"2018.SpeakingoftheChineseculture,man
AsfarasTrumpisconcerned,whichismoreimportant,thestockmarketorjobs?
Whichofthefollowingisoneofthemostseriousconsequencesofintellectualpropertytheft?
Smallcommunities,withtheirdistinctivecharacter—wherelifeis【C1】________andintenselyhuman—aredisappearing.Somehave【C2】
Despitemajorchangesinthecausesofdeathsincethe1900s,theassociationbetweendeprivationand【C1】______remainsfirmlyen
ThisbookiswritteninsucheasyEnglishsothosewithbasiccommandofEnglishcanreadandunderstandit.
Sincethedawnofcivilization,peoplehavebeencuriousabouttheageofEarth.Inaddition,wehavenotbeensatisfiedinbein
Accordingtoevolutionarypsychology,wehadtobeevolvedtobenicetoeachotherbecausetherewasnobetter________.
随机试题
当老年人照料设施中的老年人公共活动用房、康复与医疗用房设置在()层时,每间用房的建筑面积不应大于200m2且使用人数不应大于30人。
患者吐血缠绵不止,时轻时重,血色暗淡,神疲乏力,心悸气短,面色恍白,舌质淡,脉细弱。治当选用
A.甲状腺结节性肿大B.甲状腺弥漫性肿大C.甲状腺内单个质软结节D.甲状腺内单个硬结节E.甲状腺内多个囊性结节男性,40岁,发现右颈前肿块3个月,自觉咽部不适,无纳亢消瘦,经门诊医生检查,认为甲状腺癌可能性大,该医生根据哪种情况判断
治疗呕吐外邪犯胃证的主方是
二尖瓣狭窄出现右心功能不全时,原有肺淤血程度可二尖瓣狭窄输液过快、过量时,原有肺淤血程度可
注射磺胺嘧啶的三条守则是
(接上题)对于林某的行为,期货业协会有权根据具体情况给予()的惩戒。
合理情绪疗法中,常用的行为技术包括()。
Ifyouleavealoadedweaponlyingaround,itisboundtogooffsoonerorlater.Snow-coverednorthernEuropeheardthegunshot
WhydoesJanewanttoleaveherpresentjob?
最新回复
(
0
)