The ENSO effects go well beyond marine life because of its effect on worldwide rainfall patterns. In an El Nino cycle, increased rainfall dilutes the salinity of the Great Salt Lake, which increases the populations of an insect that preys on the lakes huge brine shrimp population, which preys on phytoplankton. Brine shrimp decline, phytoplankton increase. Australia goes through pronounced wet and dry climate cycles. Some perennial plants get established only in wet periods.
Red kangaroos have most of their offspring during wet periods.
And lots of trace stuff. Concentration changes with altitude. Concentrations have also changed over time. The early atmosphere contained little or no oxygen and probably more carbon dioxide. The addition of oxygen via photosynthesis probably resulted in large-scale extinctions of anaerobes.