我们参与反核活动，保护动物，以及维持和保护我们的生态系统。
We're involved in anti-nuclear activity, conservation and protection of animals and protection and support of our eco-system.
从非洲和亚洲等地挑选一群巨型动物，把它们引入到与它们现在的家园类似的其他生态系统中，首先从美国开始。
Take a select group of animals, megafauna from places like Africa and Asia, and introduce them into other ecosystems similar to their current homes, beginning in the United States.
数学模型也揭示了食物网可能是不稳定的，顶级肉食性动物的微小改变会对整个生态系统产生巨大影响。
Mathematical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems.
这对依赖北极生态系统生存的北极野生动物和土著居民提出了独特的挑战。
This raises unique challenges for Arctic wildlife and indigenous people who depend on Arctic ecosystems to survive.
现在，在湖泊生态系统的草原上，我们可以预料能找到各种动物的化石，至少在这些特定地点已经发现了大量的化石。
Now, in a grassland of Lake Ecosystem, we'd expect to find fossils from a variety of animals, and numerous fossils have been found at least at these particular sites.
在弗兰纳里1994年出版的《未来的食客》一书中，他阐述了自己的论点，人类是地球上的一种新型动物，而且是一种倾向于破坏生态系统的新型动物。
In Flannery's 1994 book called The Future Eaters, he sets out his thesis that human beings are a new kind of animal on the planet, and are in general, one prone to ruining ecosystems.
不然，这对动物们太不公平了，而且一旦他们被释放出来，也许对城市自身的生态系统造成危害。
Otherwise it's unfair to the animals, and it might be harmful to the city's local ecology if they were set loose.
我认为，世界自然基金会的建立者们想把这些事情联系起来，表示我们必须拯救整个生态系统，而不仅仅是把动物送进动物园。
I think WWF's founders wanted to make that connection, to show that we need to save whole ecosystems, and not just put animals in zoos.
不可否认，动物在维持地球生态系统的微妙平衡上起到了重要作用。
It is an undeniable fact that animals play a vital role in maintaining the subtle balance of the earth's ecological system.
海底生物群——生活在沉积物上和沉积物里的动物——构成了这个巨大的生态系统。
The benthos -- the animals living on and in the sediments -- populate this vast ecosystem.
我们知道，这些物种大多数是顶层食肉动物，而顶层食肉动物的灭绝通常会对这个生态系统造成不良后果。
We know that most of these species are top predators and we know that removing the top predators usually has negative consequences to the system as a whole.
粗略地讲，这些动物在生态系统中所占的位置现在被海豚和杀手鲸一类的齿鲸类占据。
Roughly speaking, these animals filled the ecological niches now occupied by toothed cetaceans such as dolphins and killer whales.
只有当全世界农民都用上最好的工具，能用最少的耕地养活所有人的时候，野外的生态系统和动物才能得到保护。
Wilderness and wildlife can be preserved only if the world's farmers have the best tools to feed everyone on the least amount of land.
只有当全世界农民都用上最好的工具，能用最少的耕地养活所有人的时候，野外的生态系统和动物才能得到保护。
Wilderness and wildlife can be preserved only if the world’s farmers have the best tools to feed everyone on the least amount of land.
较长期的气候变化可影响生态系统的生存能力和健康，使植物、病原体、动物、甚至人类住区的分布状况发生变化。
Longer term changes in climate affect the viability and health of ecosystems, influencing shifts in the distribution of plants, pathogens, animals, and even human settlements.
马达加斯加因其细小动物而著称，那些迷你动物因岛上独特的生态系统而进化成那么小样子。
Madagascar is famous for its tiny creatures, which have evolved that way because of the island's unique ecosystem.
导游向我们介绍，这片水域生境的植物和动物生态系统复杂而脆弱。
We learn of complex water habitats and a fragile ecosystem of flora and fauna.
同样，不让重要的稀有物种消失是为了保持生态系统的完好无损，包括在其顶端的食肉动物。
As important as keeping rare species from disappearing, he says, is keeping ecosystems - including its top predators - reasonably intact.
这种科技也被运用来深入研究考古遗迹，和模拟完整的生态系统，以规划野生动物的管理策略。
The same technology has also been used to improve the understanding of archaeological ruins and to model entire ecosystems in order to design wildlife-management strategies.
珊瑚礁列于世界上最丰富的生态系统之中，可以供养包括珊瑚鱼和软体动物在内的大批不同种类的海洋生物。
Coral reefs are some of the world's richest ecosystems, supporting a diverse array of Marine life, including reef fish and mollusks.
植物是各类动物的食源，外来者蔓延的威胁抑制它们生长，生态系统食物链的稳定性日渐堪忧。
The spread threatens to smother vegetation that is a source of food for a variety of animals, raising concerns about the stability of the ecosystem's food chain.
与鲸鱼尸体构成的生态系统类似的物种可能依靠着亿万年来死去的海洋爬行动物的尸体生存。
Species similar to those at whale falls may have depended on dead Marine reptiles for hundreds of millions of years.
乔治亚水族馆的海豚专家、动物病理学家格瑞戈·博萨尔特称，研究人员仍在尝试研究石油泄漏对墨西哥湾生态系统产生的各方面的影响。
Veterinary pathologist Greg Bossart, a dolphin expert at the Georgia Aquarium, says researchers are still trying to determine all the ways BP oil affected the Gulf's ecosystem.
珊瑚和依靠这些珊瑚生存的动物的灭绝不止仅仅对于渔业造成威胁，从地球物理的角度来看，生态系统是一个严密的生物组织体系，她规定着营养和能量的转化和流动。
The loss of corals and the animals that depend on them doesn’t just threaten fishing. From a geophysical perspective, ecosystems are biological mechanisms that regulate flows of nutrients and energy.
正如一个生态系统的运作也不同于孤零零的一棵植物或者一只动物。
An ecosystem behaves differently from its individual plant and animal components.
Riebesell博士对翼足类动物，又叫翼足目软体动物在生态系统中的角色尤其感兴趣，这些幽雅的微小软体动物是一些鱼类的重要食物。
Dr Riebesell is particularly interested in the ecosystem role of pteropods, also called sea butterflies. These elegant micro-molluscs are a vital food for some fish.
发现这么大的动物真令人惊奇，古生物学家们在怀疑我们到底对恐龙时代的生态系统有多少不知道的。
The discovery of such a large animal is startling, making paleontologists wonder how much we still don't know about the ecosystem during the "Age of Dinosaurs."
伦敦动物学会（Zoological Societyof London）蝙蝠专家凯特·琼斯说，“它们也是关键的指标物种，能提供有关生态系统健康状况的信息。
They are also a key indicator species that can provide information on the health of an ecosystem.
伦敦动物学会（Zoological Societyof London）蝙蝠专家凯特·琼斯说，“它们也是关键的指标物种，能提供有关生态系统健康状况的信息。
They are also a key indicator species that can provide information on the health of an ecosystem.
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