Any increase or decrease in the population of one species may affect all other species on the tundra .

任何一个物种在数量上的增加或减少都会影响到 冻土 带 上所有的其他物种。

Long periods of darkness and bitter cold are the major threats to life on the tundra .

长期的黑暗和刺骨的严寒对在 冻土 带上生活是两大最主要的威胁。

Human beings fill every ecological niche on the planet from the icy tundra to the tropical rain forests to the deserts .

从 冻土 地带到热带雨林，再到沙漠，人类已填满了这个星球的每一个生态位。

The arctic tundra is at the top of the world around the North Pole .

北极 冻原是指北极点周边的地区，是世界最高的地方。

As the Arctic tundra heats up carbon stored in its depths begins to move .

随着北极 冻土 带温度升高，深藏于其下的碳开始移动。

The altiplano tundra is a potential source of the formation and preservation of nature gas hydrate .

高原 冻土 带是天然气水合物生成和保存的潜在源区。

How will the life cycles of the tundra be affected ?

那么， 冻土 带的生活周期会受到什么影响呢？

Above the tree line there is a zone that is generally called alpine tundra .

在树木线上有一个区域通常被称为高山 冻原。

Few birds actually live on the tundra .

实际上几乎没有鸟类生活在 冻土 带 上。

Are one of the most hardy birds habitat in the northern tundra and boreal forests and barren mountains and desert .

是最坚强的鸟类，栖息地北部 苔原和寒带森林和荒山和沙漠。

A plant that grows more than three feet ( about a meter ) is unusual on the tundra .

一种植物若能长得超过了三英尺，这在 冻土 带上就是很不平常的了。

Few plants grow in tundra regions .

苔原地区很少有植物生长。

Swan that nests in tundra regions of the New and Old Worlds .

新旧大陆 冻原地区筑巢的天鹅。

It is this thin layer of active soil that supports all living things on the tundra .

正是这被 太阳晒 暖了 苏醒 过来的薄薄的一层土壤养活着 冻土 带上的一切生物。

Until recently the changing seasons on the tundra were seen only by a few Eskimo hunters and explorers .

不久前，也只有极少数的爱斯基摩的猎手和探险家才能深究到 冻土 带 上的寒来暑往冬去春来。

Frost-flecked tundra pools dot the landscape of Canada 's North Yukon National Park .

斑点状霜冻的 苔原水池点缀了加拿大北育空公家公园的风景。

For nine months of the year the tundra is a dark seemingly lifeless wild land .

每年长达9个月， 冻土 带都是一块看上去毫无生机的荒凉的土地。

If you keep going up you 'll emerge on the alpine tundra .

如果你登的再高一点，你将进入高山 苔原 地带。

Spring in northern Canada means the migration of three million caribou across the arctic tundra .

春天的 到来带来了加拿大北部三百万头 驯鹿的大迁徙。

North American subspecies of tundra swan having a soft whistling note .

冻原天鹅的北美洲亚种，以其柔和的鸣叫著名。

I once tracked a polar bearacross the Arctic tundra .

我曾在北极圈里追踪过 北极熊。

The animal life on the tundra is unusually rich for an environment that seems so harsh .

在这种非常恶劣的环境中， 冻土 带上动物的生活却非常充实。

The Tundra Times a weekly newspaper in Alaska ceased publication this week .

阿拉斯加的周报《 苔原时报》本周停刊了。

The transition from forest to treeless tundra on a mountain slope is often a dramatic one .

在一个山坡上，从一个树林过渡成为一个没有树木的 冻原常常是戏剧性的变化。

Desert sunrise Arctic tundra nighttime urban streets : the look of your footage defines the mood .

您的英尺 长度 神色定义了心情。

Through its own theme tundra it provides a design and color scheme common to all its widgets .

通过自身的主题 tundra，它为其所有的小部件提供了通用的设计和颜色模式。

All along this uninhabited shoreline sea islands salt marshes and sandy beaches provide a perfect resting place for Tundra swans coots gallinules and other water birds .

在这一整条杳无人迹的海岸线上，海岛、盐沼和沙滩为 冻原天鹅、黑鸭、黑水鸡和其他水鸟提供了一个绝佳的栖息所。

Oil from beneath the tundra is very important to the nations ' development .

来自 冻土 带下面的石油对美国的发展至关重要。

A solar phenomenon known as a sundog arcs over the tundra in Churchill Manitoba Canada .

加拿大马尼托巴省丘吉尔 冻原上出现了幻日光弧这种日光现象。