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View Full Version : seaweed/seaplants...no light???



Paul Leeks
2008-Aug-21, 09:50 PM
Hi!

I was wondering about seaweed and seaplants(I made up seaplant because I could not think of the right word to use!!)anyway how is it that these sorts of things exist in the deepest parts of the ocean that contain green pigment which contains chlorophyll (and chlorophyll is used for photosynthesis) but there is no light?? so how do they survive...I need more info!

OBTW I wonder who put the weed in seaweed??does seaweed get you stoned??I don't want to find out!!!

PL

Van Rijn
2008-Aug-21, 10:00 PM
Hi!

I was wondering about seaweed and seaplants(I made up seaplant because I could not think of the right word to use!!)anyway how is it that these sorts of things exist in the deepest parts of the ocean that contain green pigment which contains chlorophyll (and chlorophyll is used for photosynthesis) but there is no light?? so how do they survive...I need more info!


They don't. There are animals that look a bit like plants that can survive very deep, and there are plants that can operate with a minimum of filtered sunlight, but those aren't in the deepest parts of the ocean.

jj_0001
2008-Aug-21, 10:50 PM
As Van Rinj (Nicholas, how are you? :) ) points out, there are no photosynthesizing plants growing below the area where at least some sunlight is available.

As an aside, I'm told there are no vascular plants growing in salt water, either. Seaweeds are very sophisticated, colonial algae (things like kelp, etc), not vascular plants. Vascular plants do grow in fresh water and to some extent brackish water.

http://en.wikipedia.org/wiki/Seaweed isn't a bad start on the subject.

Paul Leeks
2008-Aug-21, 10:54 PM
good! thanks for clearing that up!

Paul

Ivan Viehoff
2008-Aug-28, 04:19 PM
As an aside, I'm told there are no vascular plants growing in salt water, either.
Whoever told you it was wrong.
http://en.wikipedia.org/wiki/Seagrass
http://en.wikipedia.org/wiki/Mangrove
http://en.wikipedia.org/wiki/Salicornia
http://en.wikipedia.org/wiki/Halophyte

mugaliens
2008-Aug-29, 01:02 AM
Whoever told you it was wrong.

Yeah. It sounded a little fishy...