some notes - Seagrasses Stomates little holes on leaves of...

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Seagrasses Stomates: little holes on leaves of plants where gas exchange occurs Zostera marina: eel grass o Along most of the coasts in the world o Doesn’t have a cuticle (this part waterproofs plants) o Have lacunae A hole/ space in the leaf Makes leaf flimsy Makes leaves buoyant- good because it keeps leaves upright so they can reach the sun and photosynthesize o Rooted in anaerobic soil; roots leak oxygen. o Carbon dioxide produced by roots, taken up by lacunae and consumed by leaves. Oxygen goes down the lacunae. o Productive: some of the highest productivity rates of any ecosystem. Up to 3,000 gc/m^2/yr Add oxygen Indirect role in food chain: leaves break down and form detritus Improve water quality: promote sedimentation because thicket of leaves slows down water current Decrease erosion: tightly knit masses of rhizomes prevent erosion Stabilize the substrate: bottom of bay is muddy and can make water more turbid.
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