第四段主旨:
David Lowe指出,这些发现也显示了鼠类在新西兰造成的破坏是深远且迅速的,展现了研究结果的意义
文章行文逻辑:
文章首先介绍了有关人类到达新西兰时间的争议,并提出了相关的问题。随后,文章介绍了一个新的研究团队如何采用新的方法来解决这一争议,并提出了与以前研究结果不同的新发现。然后,文章说明了这些新发现对于理解人类何时到达新西兰的重要性。最后,提出了这些研究结果在生态破坏评估上的意义,以及它们对现有保护措施的影响。
10. New Zealand's rats
P1:老鼠骨龄测定人类到达新西兰的时间
Rats reached New Zealang (with explorers)
rats bones pinpointed when human arrived
people get there 1400 years eralier( around 1280)
P2: 人类学家的观点<-- 被老鼠骨龄反驳 <-- 被另一些批评家怀疑
Anthro: human arrived at 1250`1300
Vs. A. : human arrived at 200 B.C.E <--- 1996 reaearch: carbon dated bones of rats
But : no evidence of settlements at that time --> controversial
carbone date<-- lab mistake
P3: 新技术带来新结果(与旧结果相悖)
W. use more accurate tech to clear up confusion
17 bones --> 1280 or later --> earily reaearch was flawed
confirmed : human arrived 1290 or later.
P4:新证据说明人们在短短600年内就对生态造成了破坏
S. : evidence vs.--> rats + human arrived before 13th century
: arrival --> deofrestation + extionction (in 600 years)
P5:补充了两个其他后果
DL.: destruction --> very fast
W. : destruction --> rat senstitive species deminishing
rat bone->human fist reach new zealand
most anthro 1250-1300 some 200bce<-1996 research rat:lab error?
JW LR new tech->new bone1280 later,old too
ancient seed1290 3june
ian support&human devast newz-> bird marine mammal 600year?
dl support&rat devast->bird frog current decline fast rat-prey