The bleaching caused the corals to lose their zooxanthellae.

白化导致珊失去了虫黄藻。

If they do not recover their zooxanthellae, they will die.

如不能找回自己虫黄藻，就会死。

When the coral is stressed, the zooxanthellae die back.

珊受到压迫会导致黄藻萎缩。

Zooxanthellae supply their coral hosts with food, which they produce through photosynthesis.

虫黄藻通过光合作用来合成食物，并将其贡献给珊宿主。

Here corals get most of their colour from the microscopic algae that live inside their tissues, the zooxanthellae.

这里珊颜色大都来自只能通过显镜才能看到藻类，这种藻类生长在珊组织--黄藻中。

When tropical waters get too warm, it destroys the delicate, symbiotic relationship between coral and microscopic algae called zooxanthellae.

当热带水域温度过高时，会破坏珊与虫黄藻这种小藻类间互利共生关系。

They have the same zooxanthellae that we saw within the corals.

具有与我在珊中看到相同虫黄藻。

Healthy, unbleached corals rely on their algae, known as zooxanthellae to absorb some sunlight.

健康、未漂白珊依靠藻类（称为虫黄藻）吸收一些阳光。

Warm-water corals maintain a symbiotic  relationship with microscopic algae called zooxanthellae.

温水珊与称为虫黄藻观藻类保持着共生关系。

To get the energy and nutrients they need to grow, the polyps team up with algae called zooxanthellae.

为了获得生长所需能量和营养，水螅体与称为虫黄藻藻类合作。

Corals are able to photosynthesize because of a special partnership, a symbiosis that they havewith a single-celled algae called zooxanthellae.

珊之所以能够进行光合作用，是因为与一种叫做虫黄藻单细胞藻类有一种特殊伙伴关系。

With the help of zooxanthellae, corals build rigid exoskeletons in dynamic formations, which  create a coral reef's three-dimensional structure.

在虫黄藻帮助下，珊在动态地层中构建刚性外骨骼，从而形成珊礁三维结构。

So this is a micrograph, a microscopic photograph I've taken, of some zooxanthellae from the tentacleof the upside-down jellyfish Cassiopeia.

所以这是一张显照片， 我拍一张显照片，是倒置水母仙后座触须中一些虫黄藻。

This is an organism that, just like the corals we were talking about, has these zooxanthellae inside of them and can photosynthesize.

这是一种生物， 就像我正在谈论珊一样，体内有这些虫黄藻并且可以进行光合作用。

And some of these nudibranchs that do thatare able to take those zooxanthellae that we were talking about earlier, put them inside of their own cells, and then they become photosynthetic.

一些这样做裸鳃类动物能够吸收我之前谈到那些虫黄藻，将放入自己细胞内，然后就会进行光合作用。