In contrast, chlorophyll fluorescence is a direct measure of photosynthetic activity.

相比之，叶绿素荧光能直接地测量光合作用活动。

That's how much is being sucked in by these photosynthetic organisms.

这就是这些光合生物吸收的量。

Our atmosphere is full of it thanks to plants and photosynthetic bacteria.

多亏了植物和进行光合作用的细菌，我们的大气中充满了碳水化合物。

There are some phytoplankton, some photosynthetic plankton that also undergo vertical movements.

有一些浮游植物，一些光合作用的浮游生物也进行垂直运动。

Because they don't have nutrients, the photosynthetic rates themselves will decrease.

因为这样它们就得不到养分，光合作用速度。

The whole of the plant is pretty much photosynthetic, so it grows fast.

整个植物都在做光合作用，所以它长得很快。

Over the next few hundred million years, early photosynthetic cells just churned this stuff out.

在接来的几亿年里，早期的光合作用细胞产生了大量这样的物质。

And then, the symbiotic algae that live inside corals-which are photosynthetic food factories-abandon the corals.

之后，珊瑚礁体内的共生藻类，也就是进行光合作用的食物工厂，抛弃珊瑚。

Phytoplankton's massive photosynthetic blooms produce as much as half of Earth's oxygen.

浮游植物大量的光合作用产生了地球上一半的氧气。

If not dealt with, the excess light can damage their photosynthetic machinery.

如果不解决这个问题，过量的光线毁坏植物中运行光合作用的机制。

But that's just one of three ways that light entering a photosynthetic organism is used.

但是这仅仅只是光进入光合生物体内被使用的三种方式的其中一种。

At least 50% of the oxygen on earth is produced by photosynthetic microorganisms like algae and cyanobacteria.

地球上至少 50％ 的氧气都是由光合微生物，例如藻类和蓝细菌产生的。

They feed mainly on plankton, like photosynthetic cyanobacteria.

它们主要以浮游生物为食，例如光合蓝藻。

Here a photosynthetic flagellate called Euglena deses is dividing.

在这里，一种叫做裸藻的光合鞭毛虫正在分裂。

And photosynthetic lifeforms like algae, that had ways of withstanding low-light conditions, also survived.

像藻类这样的光合生命形式，能够承受弱光条件，也能生存来。

They jumped ship, leaving the chitin rafts  behind to be full-time photosynthetic drifters.

他们跳船，留几丁质筏，成为全职的光合作用漂流者。

Those are Prochlorococcus. They are the smallest and most abundant photosynthetic cell on the planet.

那些是原绿球藻。它们是地球上最小和最丰富的光合细胞。

So effectively we have photosynthetic animals.

如此有效，我们有光合作用的动物。

Corals can be found here, but lack the  photosynthetic symbiotes of their tropical sunlit cousins.

珊瑚可以在这里找到，但缺乏热带阳光照射的表亲的光合共生体。

Braghiere: Because they don't have nutrients, the photosynthetic rates themselves will decrease.

Braghiere：因为它们没有营养，光合作用速率本身低。