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sea plants

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sea plants

Postby thehurt » Sat Feb 04, 2006 10:21 pm

are the plants in the sea technacly plants? if so how do they survive without the use of CO2 for photosynthesis?
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Postby bearhug » Sat Feb 04, 2006 10:33 pm

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.
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Postby Poison » Sun Feb 05, 2006 4:09 pm

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? :)
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Postby bearhug » Sun Feb 05, 2006 10:48 pm

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.
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Postby Poison » Sun Feb 05, 2006 10:50 pm

Yes that's right, they are classified under protista. But they are plants.
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Postby bearhug » Mon Feb 06, 2006 2:31 am

Thanks for clarifying that.
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Postby Dr.Stein » Mon Feb 06, 2006 7:40 am

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. :twisted:

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 :)

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