Which shifts in marine trophic structure emerge following the onset of an El Niño event?

💡 Explanation

When an El Niño occurs, upwelling of nutrient-rich cold water weakens because trade winds diminish, leading to a decline in primary productivity and reduced zooplankton populations, ultimately causing prey scarcity for seabirds. Therefore decreased seabird populations result, rather than increased diatoms, expanded kelp, or enhanced coral which require nutrient upwelling and stable temperatures.

• Which phenomenon causes the observed Coriolis effect on global weather patterns?
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