The Life Cycle Of Coral Reefs

627 words - 3 pages

Rhythmic waves graze the tops of stony, skeletal bristles of the coral reef. They are underwater rainforests teeming with life in vibrant colors, rooted in the ocean floor. Their bristles peek behind wave crests, hinting at the life below. Just beneath the surface lies a marine paradise in a constant struggle for existence.This is where existence begins for the coral. Free-floating larvae drift along the ocean’s currents into the open sea. As larvae come to rest in a tropical photic zone, a completely new reef is born. In a few days, the larvae become a small polyp. Its tentacles encircle a primitive mouth sucking down its prey like a garbage disposal. As identical polyps spin off, a new colony begins.As the polyps multiply, their protective lime stone skeleton grows as well. An inner skeleton forms as each polyp extracts calcium and carbonate from seawater, ensuring the survival of the next generation. This infrastructure also ensures the survival of a vast community of other creatures living inside the coral. Inside the coral’s flesh reside millions of algae, which in turn, provide a source of energy for growth.Coral and algae share a symbiotic relationship. The algae extract carbohydrates and fats from coral waste, in exchange for energy the algae extract energy from the sun. This recycling process is a beautiful chemical conversation.Reef-building corals initiate photosynthesis as sunlight penetrates the waters of clear warm, tropical shallows where coral thrive. Under proper conditions, sunlight can provide millions of microscopic algae with a source of light energy for conversion of chemical energy.Ninety-eight percent of the coral’s food comes from algae, the tiny plants that make a reef’s existence possible. Through evolution, coral have adapted to harbor its algae. Like all plants, algae are sensitive to sunlight. Horizontal extension allows the coral to regulate incoming sunlight with pigments to maintain the proper amount of sun absorption. This vivid and bizarre profusion of colors is only visible in ultra violet light. Through regulated sun absorption, the coral secures the...

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