Question

In which ecosystem living organisms are found in abundance​

Answer 1

Answer: It’s probably Pelagibacter ubique, also known as Candidatus Pelagibacter communis, a minute planktonic bacterium. It’s one of the smallest self-replicating cells known, and undergoes regular seasonal cycles in abundance, in summer making up about 50% of the cells in temperate ocean surface waters. There are estimated to be 2.4 × 10^28 of them in the oceans.