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Section 6 Ocean Primary Production

111 Every ecosystem requires an input of energy. The source varies with the system. In the majority of Ocean ecosystems the source of energy is sunlight that drives photosynthesis done by micro- (phytoplankton) or macro- (seaweeds) algae, green plants, or photosynthetic blue-green or purple bacteria. These organisms produce ecosystem food that supports the food chain, hence they are referred to as Primary producers. The balanced equation for photosynthesis that is correct, but seldom used, is 6CO2 + 12H2O = C6H12O6 + 6H2O + 6O2. Water appears on both sides of the equation because the water molecule is split, and new water molecules are made in the process.

spreading ridges on the sea floor—support exotic chemical-based ecosystems. The thriving communities associated with these vents shocked the scientific world when humans first observed a vent on the deep ocean floor in 1977. These vent ecosystems depend on microbes that use chemical energy available in the minerals from the hot spring water.

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Transcription of Section 6 Ocean Primary Production

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Chemosynthesis

oceanexplorer.noaa.gov

coast of Ecuador found hot vents on the ocean floor spewing a chemical soup of hot fluid. Surrounding these hydrothermal vents was a community of several new animal species— thriving despite living in total darkness with no access to sunlight! These incredible communities have since been found at spreading centers and

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oceanexplorer.noaa.gov

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oceanexplorer.noaa.gov

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oceanexplorer.noaa.gov

This sighting was a phenomenon . that had been predicted but never before confirmed. To their amazement, the scientists also found that these vents were surrounded by large numbers of organisms that had never before been seen. A diverse ecosystem was thriving here—in the absence of the sunlight

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cpb-ca-c1.wpmucdn.com

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