Answer:
Approximately 72% of Earth’s surface is covered by aquatic ecosystems, but they only account for supporting about 1/3 of the biosphere’s primary producers. This compares to terrestrial ecosystems which cover 28% of Earth’s surface yet account for the remaining 2/3 of the biosphere’s primary producers. Taken together this means terrestrial ecosystems are 5-6 times more productive than aquatic ecosystems per unit area.
Step-by-step explanation:
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