Final answer:
An example of an abiotic element in a marine ecosystem is the pH of the water.
Step-by-step explanation:
An example of an abiotic element in a marine ecosystem is the pH of the water. Abiotic factors are non-living components of an ecosystem, and the pH level of the water is an important abiotic factor that affects the survival and growth of marine organisms. For example, many marine organisms have specific pH requirements for physiological processes such as enzyme activity and gas exchange. If the pH level of the water changes significantly, it can have harmful effects on the marine ecosystem.
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