Although plants fill the land, on reflection how about the sea?

　面白かったので、英訳してみた。ツッコミがあれば受け付けるで。トラバは書きかけ、あとで直す。
I translate this article, because it is an interesting question.I will accept any question.
　意外と深い問いだよ、これ。植物は海にいることはいる。でも増田の言う通り、海を埋め尽くすほどはいない。陸上に上がる前に海くらい制覇しとけよって思うんだよね。植物は植物で、いろいろ複雑な事情がありそうですね。
Surprisingly how deep question this is. Plants certainly exist in the sea. But there are not as much as filling the sea, as this auther says. I think that do conquest just the sea before transiting to land. Plants itself seem have variously complex reason.
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Why any plants do not vegetate the surface of the sea?
There is a water always, and are minerals, are there? Even it does not lack the sun light. It is strange that such plant does not exist.

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But many seaweeds which voluminously grow in the temperate shallow exist a lot.

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The plankton as small as we cannot see is luxuriating, and snowballing their own number by a division is more optimized than taking a long time to grow an individual.

By the way, I wonder why it is like that.

Because I guess that someone endlessly become big like a whale result in eating it. Just a bit survived one escape and can increase in other places if it takes a strategy of the division.
Or because it cannot go against the drift of the tide, I wonder that it cannot bear because changes of surrounding environment is severe.
But I wonder a jellyfish is alive...
I think based on the reason why the jellyfish has a poison, after all I wonder it have been gobbled.

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The plants fill the land because of the gravity, and does not the surface of the sea because of the gravity, too.

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　 But the surface of the lake is filled with them.

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　　 In shortly, it cannot ensure the variety. It is just a story that a Japanese cedar and pine does not come out from the surface of the water, does it?

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Because there is a wave.

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A phytoplankton. / It seems lack phosphorus and nitrogen in the open sea.

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A phytoplankton exists. If it becomes huge or organized, that is all it gets poorer efficiency of its life support, so there is no merit.

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You might not see because vegetables which grow in the Pacific ocean result in flowing to the South China Sea. Just now, the Philippines and the China have a trouble about harvesting that vegetables.

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I think that a place which is shined to the seabed is only a coastal area. / Oh, the surface of the sea? Cannot it absorb nourishment by a root?

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Although I am not entirely sure, I suspect that you can see many enough planktons to fill the water, when you look through a microscope. / Almost all macrophytes will be dead by being poured a sea water. The sea water is too much sodium ion (and other minerals) to absorb the water.

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What kind of plant does fill the desert?

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It is not nutritious enough to fill. Well, it becomes a red tide, when it becomes eutrophication. It might seem filling.