Surprisingly few extinctions of indigenous species can be attributed to competition from introduced species.
令人惊讶的是，本土物种的灭绝很少归因于外来物种的竞争。
They say that portraying introduced species as inherently bad is an unscientific approach.
他们说把外来物种描绘成天生的坏物种是一种不科学的做法。
Introduced species can often undergo a population boom just after introduction.
被引进的物种在刚被引入之后往往会发生数量暴增。
It is only here where you can find areas still free from introduced species, as in the seas around Antarctica.
只有在这儿，你才能发现还有像南极洲周围的海域那样的尚没有引进物种的海域。
Our goal for the day is to continue the control of introduced species such as rats, mice and stoats who are preying on birds.
我们今天的目标是继续对引入的、以鸟类维生的生物例如各种老鼠、鼬的控制。
Various conservation measures have transformed the formerly bare hillsides and slopes into areas with plants of local and introduced species.
本港在采取各项自然护理措施后，以往是不毛之地的山坡，现已种植了本地及外来植物。
As the world's only flightless parrot, the kakapo is a truly unique bird which is threatened by introduced species in its native home of New Zealand.
鸮鹉是世界上唯一不会飞的鹦鹉，也是唯一一种受新西兰本土引入物种威胁的鸟类。
Discovered by outsiders in 1979, the crested iguana's Numbers are rapidly dwindling due to the brisk spread of introduced species, such as feral cats and black rats.
冠鬣蜥自1979年被来自岛外的人们发现以来，由于随之引入的例如野猫和黑鼠等外来物种的迅速蔓延，他们的数量正在急剧缩减。
Like many introduced species, American mink can slash their way through the ecosystem, as they have no native predators, and their prey species haven't evolved to avoid them.
就如许多引进的物种一样，美国貂也能通过生态系统杀出一片生机，因为它们没有本土的天敌，而它们所掠食的物种还没有进化到可以躲避它们的掠食。
Indeed, work with some other species suggests they too can refine their quantitative thought if they are introduced to the cognitive power tools we call numbers.
事实上，对其他一些物种的研究表明，如果引入我们称之为数字的认知工具，它们也可以完善自己的定量思维。
This was described by Darwin for indigenous New Zealand species of animals and plants, which died out when competing species from Europe were introduced.
这是达尔文为新西兰本土动植物物种所描述的，它们在来自欧洲竞争物种被引进时灭绝了。
Ragwort was accidentally introduced to New Zealand in the late nineteenth century and, like so many invading foreign species, quickly became a pest.
19世纪末，狗舌草被偶然引入新西兰，像许多入侵的外来物种一样，它很快就变成了一种有害生物。
In some case, non-native species of oysters are introduced after a population decline, and they bring with them diseases that further kill off the native oysters.
在一些例子中，非本土种类的牡蛎会在本土数量下降后引入，它们随身带来的疾病会进一步杀死光本土牡蛎。
Dr MacKinnon says in some cases, alien species have been introduced to a country by people with good motives in mind, but they lead to disastrous results.
麦克·金南博士说，在某些情况下，向一个国家引进外来物种的人的动机是好的，但导致了灾难性的后果。
That was determined largely by specific events in each ponds' history, such as the order in which species were introduced.
而决定这一切的是各个池塘在其演化过程中所经历的不同事件，比如物种被引入该池塘的顺序。
Some of the beasts that have been introduced, such as foxes, eat the native species, or their food, and many imported plants prove invasive and overwhelm the locals.
还有一些引进的动物，如狐狸，它们会吃本土的物种或抢它们的食物，并且许多引进的植物也带有侵略性，他们会破坏本地物种。
It didn't used to be so solitary, but humans introduced goats to the island, which ate every other member of its species.
本来，她还不至于如此孤单，可自从人类在该岛上引入山羊，她的所有同伴就被吃了个精光。
A bumblebee draws nectar from an Arizona sunflower. Many bumblebee species are in decline, mainly because of habitat loss and likely due to introduced pathogens.
一只大黄蜂正在一株亚利桑那向日葵上吸取花蜜。很多种类的大黄蜂其数量都在减少，这主要归咎于栖息地的丧失和病原体的引入。
One of the 100 most invasive species in the world the Nile perch was introduced to East Africa's Lake Victoria in the 1950s, and has wreaked environmental havoc ever since.
在世界上100种影响最大的外来入侵物种中，尼罗河鲈鱼是其中之一，它于20世纪50年代被引入到东部非洲的维多利亚湖。 由于鲈鱼的肆虐，环境混乱的窘境一直延续至今。
Plants have also fared badly: a root fungus deliberately introduced into Australia has destroyed several species.
植物的运气也不佳：有意引进澳大利亚的一种根生真菌已经毁灭了几个物种。
"Invasive alien species are non native species which are accidentally or intentionally introduced into new areas. They range from microbes to mammals," Dr MacKinnon says.
麦克·金南博士说，“侵入性外来物种是偶然或故意被引入新地区的非本土物种，其范围涉及从微生物到哺乳动物的多个物种。”
Many bumblebee species are in decline, mainly because of habitat loss and likely due to introduced pathogens.
很多种类的大黄蜂其数量都在减少，这主要归咎于栖息地的丧失和病原体的引入。
In the 1980s molecular and genetic analysis was introduced, enabling species to be identified by their DNA rather than visual observation.
1980年分子学和基因分析的出现，可以通过物种的DNA而不是通常的观察来鉴别他们。
Household cats were introduced in North America by European colonists; they are regarded as an invasive species and have few natural enemies to check their Numbers.
欧洲殖民者向北美洲引入了家猫；家猫被视为入侵物种且几乎没有天敌。
Bringing it back to Europe with him, he introduced the world to a new species of ape: the mountain gorilla (gorilla gorilla Beringe, in Beringe's honor).
他把它带到了欧洲，向世界介绍了一个新的猿猴种类：山地大猩猩(为纪念Beringe，他也被叫做Beringe大猩猩)。
Ron: Wallabies, they're those little mammals from Australia and they were introduced in Hawaiiand now they're wild in Hawaii. They've become their own species.
罗恩：沙袋鼠是来自澳大利亚的哺乳动物，它们被引进到夏威夷，现在在夏威夷是野生动物。它们已经成为了夏威夷的物种。
A carefully researched, analytical look at the effects that new species have on different environments into which they are introduced.
本书对新物种被引入不同环境后带来的后果进行了细致分析。
Resources of biological species introduced from abroad shall, according to law, be registered or be subject to examination and approval, and appropriate safety and control measures shall be taken.
从境外引进生物物种资源应当依法进行登记或者审批，并采取相应安全控制措施。
Resources of biological species introduced from abroad shall, according to law, be registered or be subject to examination and approval, and appropriate safety and control measures shall be taken.
从境外引进生物物种资源应当依法进行登记或者审批，并采取相应安全控制措施。
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