And then it bottoms out and starts to get rich again.

“微生物降到最低点，然后再次开始活跃起来。”

Some scientists estimate that the mass of microbes living deep underground equals the mass of all the life at Earth's surface.

一些科学家估计生活在地下微生物，跟所有生存在地球表面生物差不多。

The width of the bar in the number pyramids represents the number of organisms in that trophic level.

塔中条形宽度代表该营养级中生物。

Also, the overall number of marine animals has gone down by about half since 1970.

另外，自1970年以来，海洋生物总体已经下降了近一半。

People who study science use this word to talk about the number of different kinds of living things on the earth.

研究科学人用这个词来谈地球上不同种类生物。

The unit for this is number of organisms.

其单位是生物体。

But this still only explains why there's more life, not why there is more different kinds of life.

但这只能解释生物丰富，而不能解释物种多样。

And in one teaspoon of soil, there are more microorganisms than there are people on the Earth.

在一茶匙土壤中，微生物比地球上人口还要多。

They can be used to show numbers of organisms or biomass of each trophic level in ecosystem.

它们可以用来显示生态系统中每个营养水平生物或生物。

So bottom-feeding fish populations may increase, even if plankton-eating fish population decrease.

因此，即使以浮游生物为食鱼类减少，底栖鱼类也可能会增加。

In the future, species identification equipment will be deployed in the plant to figure out the number and variety of creatures, he added.

他补充说，未来，物种识别设备将部署在工厂中，以确定生物和种类。

Insects make up the largest class of animals on earth and represent more than half of all known living organisms.

昆虫是地球上最多一类动物，占所有已知生物一半以上。

Stool sample analysis revealed significant differences in the diversity and volume of microbes between the monks and their neighbours.

粪便样本分析显示，僧侣和他们邻居在微生物多样性和上存在显著差异。

Human activity is the driver of the declines we're seeing, primarily our demand, our increasing demand for food, energy, water.

人类活动导致了当前生物减少，这主要是因为我们对食物、能源和水资源需求日益上升。

These changes may increase pathogenic organisms or their activity causing a series of oral infectious diseases such as dental caries or periodontal diseases.

这些改变可能会增加致病微生物或提高其活性，从而导致诸如龋齿、牙周疾病等一系列口腔感染性疾病。

Researchers say these creatures will now reproduce in larger numbers than before because of the extra space created by the rubbish.

研究人员表示，由于垃圾产生额外空间，这些生物现在繁殖将比以前更多。

They are food for so many of the inhabitants here, and they're so numerous they really dominate the oceans around here.

它们是这里许多其它生物食物，它们如此之多，它们主宰了这片海洋。

This is because rather than showing the number of organisms they show the number of the total mass in that trophic level.

这是因为它们显示不是生物体，而是营养级总质。

Sweden-based Innoscentia is developing a sensor that can show if meat is safe to eat by measuring the buildup of microbes inside its container.

总部位于瑞典Innoscentia公司正在开发一种传感器，该传感器可以通过测肉类容器中微生物积聚来判断肉类是否可以安全食用。

Meanwhile in Florida's Everglades, Burmese pythons, thought to have been released by pet owners, are the cause of decreasing populations of organisms.

与此同时， 在佛罗里达州大沼泽地，缅甸蟒蛇被认为是宠物主人放生，它们是生物减少原因。