(is it too early to do a reflection post? I’m afraid I’ll forget to ask tomorrow.)

I understand the carbon cycle from: atmospheric CO2, traveling through the biome (producers, consumers, detritivores, respiration) through diffusion INTO the ocean, and the formation of coral reefs/calcium carbonate, but I don’t understand what the last step in the cycle is. The CO2 has to return to the atmosphere, right? How does the CO2 exit the coral that’s been formed/deep ocean, and return to the atmosphere? Or is the step where calcium carbonate is formed a ‘branch’ off the cycle, and the real place where CO2 is returned is through respiration of surface aquatic organisms on the ocean-top?

Thanks, miriam.

Via:pdsblogs. org

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