There are many types of kelp in underwater ecosystems that vary in size shape and color. They are a major keystone species in this ecosystem and without it many organisms would die. The kelp closest to the shore is green like most land plants it has the most exposure to sunlight because the water is shallow. As the water gets deeper light penetrates less and less, resulting in different colored kelp. In medium depth, the kelp is brown, and then in the deepest areas of the sea it is red. This pattern is recognizable to us because we see the trees around us change colors as seasons pass, In the summer they are green, then change to brown and red when the sun is not out as much. The diagram above shows the parts of kelp.
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