These grasslands make up the largest biome in North America.

这些草原构成了北美最大群落。

That came at a price, however. Almost half of the original biome has been destroyed.

然而，这要付出代价。几乎一半原始群已经被摧毁。

The boreal forest, also known as Taiga, is the largest terrestrial biome on the planet.

北方针叶林也被称为泰加林，地球上面积最大陆地态群系。

The boreal forest is the largest terrestrial biome in the world.

北方针叶林世界上面积最大陆地态群系。

So this is now a really significant biome on earth, and it's largely unknown.

因此，这地球上非常重要群落，而且大多数未知。

Under the leadership of climate change skeptic President Shire Bolsonaro, some scientists say the Amazon is nearing a tipping point, from which the biome may never recover.

在气候变化怀疑论者总统希尔·博尔索纳罗领导下，一些科学家声称，亚马逊河正接近一个临界点，即该地区群系可能永远不会恢复。

High enough to lift them out of the tropical environment that the lands would otherwise be in down at lower elevations and into a more temperate biome with cooler temperatures and less humidity.

这里海拔高度足以让它们脱离热带环境，否则这些土地就会处于较低海拔地区，变成温度较低、湿度较小温带群落区。

The Atlantic rainforest is one of the planet's most threatened biomes, more than 90 percent of it was deforested and destroyed.

大西洋雨林地球上受威胁最严重群落之一，有超过百分之九十森林被砍伐和破坏。

A warming climate can also throw plants off their usual tight schedule that keeps biomes as a whole running smoothly.

变暖气候也会打乱植通常紧凑时间表，而它们通常紧凑时间表维持群落整体平稳运行。

The nodules are a core part of a biome roughly the size of the Amazon rain forest, she notes.

她指出，这些结核一个大致相当于亚马逊雨林大小群落核心部分。

Take the trees of the temperate forest biome.

以温带森林群系树木为例。

The boreal forest is the largest terrestrial biome in the world. It covers 14 percent of the land on earth.

北方森林世界上最大陆地群落。 它占地球陆地面积14%。

On the bad side, the presence of mountains only amplifies the previous negatives with developing desert and jungle biomes.

从不利一面来看，山脉存在只会扩大之前发展沙漠和丛林群落不利因素。

That's essentially a semi-arid steppe biome and an extension of the vast American Great Plains.

这基本上半干旱草原群落，广阔美国大平原延伸。

Like, think about an aquatic — or water-based — biome.

比如，想想水或水基群落。

And on a global scale, plants connect all of these complex biomes through nutrient cycles, or pathways that move nutrients between living organisms and their environment.

在全球范围内，植通过营养循环或在体和环境之间移动营养质途径将所有这些复杂群系连接起来。

It obviously rains a lot in these biomes and that makes things like drying concrete for your roads or foundations rather difficult.

在这些群落中，雨水显然非常多，这使得道路或地基混凝土干燥工作变得相当困难。

But that's only the first problem the jungles suffer from, from an economic development standpoint, arguably the bigger problem is that agriculture in jungle biomes just like in deserts is also very difficult.

但这只丛林面临第一个问题，从经济发展角度来看，可以说更大问题，丛林群落农业就像在沙漠一样，也非常困难。

Then those grasses creep into deserts, where they can act like firekindling — and deserts aren't accustomed to burning frequently, like some other biomes are.

然后，这些草爬进沙漠，在那里它们可以起到引火作用——而沙漠不习惯像其他一些群落那样经常燃烧。

This warm, humid biome has a dense canopy of trees that supports incredibly diverse plant and animal life; including thousands of species of birds and freshwater fishes, and hundreds of species of mammals, reptiles, and amphibians.

这个温暖潮湿群落有茂密树冠，支撑着令人难以置信多种动植；包括数千种鸟类和淡水鱼，以及数百种哺乳动、爬行动和两栖动。