sea plants

[thehurt]

are the plants in the sea technacly plants? if so how do they survive without the use of CO2 for photosynthesis?

[bearhug]

are you referring to algae? Because algae is actually not a plant but a protist. Chlorophyta is green algae, Rhodophyta is red algae, then there's brown and gold algae.

[Poison]

Let me say something. Algea ARE plants. That's what botanists say.

And answer for the first question: CO2 and O2 exist in water. If they weren't, how would fish survive? Did you get my point?

[bearhug]

Green, Red, Gold, and Brown algae are protists, maybe they are considered plants as well. Brown, red and green algae are also referred to as seaweeds.

[Poison]

Yes that's right, they are classified under protista. But they are plants.

[bearhug]

Thanks for clarifying that.

[Dr.Stein]

Hey guys, you may forget, there is a REAL plant in the sea: seagrass, it is Angiospermae/Anthophyta. Example genera: Zostera, Phyllospadix, Heterozostera, Posidonia, Halodule, Cymodocea, Syringodium, Thalassodendron, Amphibolis, etc.

They do photosynthesis using dissolved carbon dioxide (bicarbonate) resulted from sea animal's respiration activity. Then animals will get oxygen (DO) generated from the photosynthesis. A nice relationship eh?

This is one of my lovely seahorses living around the Zostera sp. (you can see the background). So we call it Hippocampus zosterae (Jordan & Gilbert, 1882) or dwarf seahorse, the smallest seahorse, a cutie