手机APP下载

您现在的位置: 首页 > 在线广播 > 科学美国人 > 科学美国人地球系列 > 正文

科学美国人60秒:人类肆意猎杀 破坏动物种群繁殖

来源:可可英语 编辑:mike   可可英语APP下载 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
Tr(cdF~qOu8(P1ES
Humanity has a long history of working together to hunt large prey.
As evidence, see the extinction rates of large animals after people first arrive in a new locale.
Now scientists have a clearer view of our predatory role, across a number of terrestrial and marine ecosystems.
And the picture is not a pretty one—we have some bad hunting habits.
Researchers surveyed 2,125 species of predators on land and in the water.
And they compared the behavior of nonhuman predators to humans in those ecosystems.
Perhaps not surprisingly,humans prey on important large carnivores at a dramatically higher rate than other predators do.
The biggest difference, however, comes in which members of the population we cull.
Typical predators might kill the young or the infirm.
Humans, both on land and particularly in the water, claim a disproportionate number of mature healthy adults of reproductive age.
This practice has dramatic consequences.
Removing reproductive adults, especially for species that mature slowly, can do long-term damage to the entire population.
The authors thus call humans “super-predators.”
Their report is in the journal Science.
They write that options to encourage more sustainable exploitation could include reducing the take-but also mimicking other predators and leaving full-grown adults alone to continue repopulating their habitats.

o[f6@;UBPn

!KVnSp[B4mrvUAB+J|K^^#S5jo&@I^=v2Sx&=ZsQ^W

重点单词   查看全部解释    
dramatic [drə'mætik]

想一想再看

adj. 戏剧性的,引人注目的,给人深刻印象的

联想记忆
infirm [in'fə:m]

想一想再看

adj. 弱的,虚弱的,柔弱的

联想记忆
claim [kleim]

想一想再看

n. 要求,要求权;主张,断言,声称;要求物

 
exploitation [.eksplɔi'teiʃən]

想一想再看

n. 开发,开采,利用

 
population [.pɔpju'leiʃən]

想一想再看

n. 人口 ,(全体)居民,人数

联想记忆
prey [prei]

想一想再看

n. 被掠食者,牺牲者
vi. 捕食,掠夺,使

 
community [kə'mju:niti]

想一想再看

n. 社区,社会,团体,共同体,公众,[生]群落

联想记忆
species ['spi:ʃiz]

想一想再看

n. (单复同)物种,种类

 
mature [mə'tjuə]

想一想再看

adj. 成熟的,(保单)到期的,考虑周到的

 
typical ['tipikəl]

想一想再看

adj. 典型的,有代表性的,特有的,独特的

 

发布评论我来说2句

    最新文章

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。