This easterly decline in species diversity is well demonstrated by birds and coral fish.
鸟类和珊瑚鱼很好地证明了东部物种多样性的退化。
There is usually a good deal of turnover in species composition, even in a mature community.
即使在一个成熟的群落中，物种组成通常也有很大的变化。
Predators are an essential factor in maintaining communities that are rich and diverse in species.
捕食者是维持群落物种丰富多样的一个重要因素。
Phenology signals are clearer than changes in species distribution.
物候变化是比物种分布更为清晰的信号。
The study is among the first to reveal the environmental consequences of such a catastrophic decline in species.
这项研究第一次揭示了物种灾难性减少过程中的环境效应。
The broader impacts of climate change range from rapidly melting glaciers and rising sea levels to shifts in species ranges.
来自迅速融化冰川的气候变化影响范围在扩大，上升的海平面也改变了物种的分布范围。
They added more than 100,000 additional associations between genes and traits in species including mice, yeast and nematode worms.
他们又另外往里输入了超过100，000种基因和物种特征之间的相互关系，这些物种包括老鼠，酵母菌和线虫。
What mirror neurons are really doing. A fascinating, lucid analysis of how mirror neurons work — even in species that don't mimic.
镜像神经元究竟有什么作用：有关镜像神经元如何作用的精彩而又透彻的的分析。
These shifts in species composition may be benign, or they may result in a cascade of negative consequences throughout the Marine food web.
这些物种组成的转变可能是良性的，也有可能导致整个海洋食物网的一系列消极后果。
In species such as dogs, cats, seals, birds, humans and even burying beetles, infants know that the way to get what they want is to make a fuss.
像狗、猫、海豹、鸟、人类以及埋葬虫这样的物种，它们的幼子都知道达到自己目的的方法就是吵闹。
Iridium is rare on Earth but common in space, and the Alvarezes proposed that a giant asteroid had hit the Earth, producing the sudden decline in species.
铱在地球上很稀有，但是在宇宙空间中却很常见。Alvare z提出一个巨大的行星曾经撞击地球，造成了物种的突然减少。
The researchers found that the rate at which nucleotides changed in tropical species was more than twice that found in species from temperate latitudes.
研究人员发现热带植物的核苷酸变化速率比温带地区植物中核苷酸的变化速率高出两倍多。
In some parts of the world, jaguars and leopards are completely black, an adaptation that only seems to arise in species that live in a diverse range of habitats.
在世界的部分地方，美洲虎与美洲豹通体都是黑色，这种适应色好像只在某些生活在各种不同的栖息地的动物身上出现。
In species where males compete for females, females will only reproductively benefit from having a male if they have enough resources to have a large, competitive male.
雄性竞争雌性的物种中，只有在有足够的资源的情况下，雌性才能通过得到强大、有竞争力的雄性而使物种受益。
Big is dominant and in species after species, humans included, postures that enhance the posturer's apparent size cause others to treat him as if he were more powerful.
在包括人在内的所有物种里，“大”才是主宰，而如果你的身姿可以让你看起来更高大的话，那么别人也会觉得你更有力量。
And in the current edition of Science, Dr Pagel and his colleagues publish evidence that they do so in a way which looks intriguingly similar to what happens in species.
在这一期的《科学》中，Pagel博士和他的同事发布了能证明这一点的证据——跟在物种上发生的事情奇妙的相似。
Worm’s own work suggests that fisheries in the more species-rich of the world’s marine ecosystems appear less likely to collapse and faster to recover than fisheries in species-poor regions.
Worm自己的研究表明在世界海洋生态系统中，种类丰富的养鱼场比种类贫乏的衰落的机会更少，恢复得更快。
Melanic forms, though, are particularly prevalent in species with complicated lives—those that inhabit a range of habitats, are active both day and night, and move between the ground and the trees.
可是，黑色外表为各种复杂形式的物种所有，它们栖息在不同地带、有白天活动的也有黑夜活动的、有在地面生存的也有在树上生存的。
In these species, fertilized eggs develop into females and unfertilized eggs into males.
在这些物种中，受精卵发育为雌性，未受精卵发育为雄性。
So how long can a gene survive in a species if it is no longer used?
那么，如果一个基因不再被使用，它能在一个物种中存活多久呢？
That's what a keystone species does in an ecosystem.
那就是拱顶石物种在生态系统中的作用。
Last week, the group of scientists said they had found important biological qualities in some bat species.
上周，这组科学家表示，他们在一些蝙蝠物种中发现了重要的生物特性。
Cases in which many species become extinct within a geologically short interval of time are called mass extinctions.
许多物种在地质上很短的时间间隔内灭绝的情况称为大灭绝。
Caloric-restriction projects underway in two species more closely related to humans—rhesus and squirrel monkeys—have made scientists optimistic that CR mimetics could help people.
对与人类联系更密切的两个物种——猕猴和松鼠猴——进行热量限制的项目，使科学家对模拟热量限制可以帮助人类抱有乐观的态度。
He explains that the disappearance of one animal can have serious consequence to remaining species in that habitat.
他解释说，一种动物的消失可能会对该栖息地的其他物种造成严重的后果。
There are 200 species of birds in Romania's wetlands.
在罗马尼亚的湿地中有200种鸟类。
Biologists can infer how species are related evolutionarily by comparing DNA sequences for the same genes in different species.
生物学家可以通过比较不同物种中相同基因的DNA序列来推断物种之间的进化关系。
Of the 7,000 alien species in the United States—out of a total of 150,000 species—only about 10% are invasive.
在美国总共15万的物种中，有7000种外来物种，当中只有10%是入侵物种。
Of the 7,000 alien species in the United States—out of a total of 150,000 species—only about 10 percent are invasive.
在美国总共15万的物种中，有7000种外来物种，当中只有10%是入侵物种。
Of the 7,000 alien species in the United States—out of a total of 150,000 species—only about 10 percent are invasive.
在美国总共15万的物种中，有7000种外来物种，当中只有10%是入侵物种。
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