 Due to the rich genetic diversity and high specialization of individual species with respect to infectious range, variations in their ecology are not unusual, resulting in unique spatio-temporal patterns, which ultimately depend on lifestyle and nature of the host.As such, previous survey data highlighted two prominent seasonal abundance peaks for both "Chlorella variabilis" NC64A and "Chlorella variabilis" Syngen viruses — one in late fall, and the other in late spring to mid-summer — which is likely attributed to the fact that they share a host species.Conversely, "Chlorella heliozoae" SAG viruses peaked at different times of the year and generally exhibited more variability in titers, as compared to the NC64A and Syngen viruses.