What ecological pattern is commonly observed in Cicadidae populations?

What ecological pattern is commonly observed in Cicadidae populations?

• A. Synchronous emergence
• B. Random staggered emergence
• C. Diurnal-only activity
• D. Year-round activity

Answer: (A)

Cicadas show a striking pattern of mass, synchronized emergence. Many species spend years as underground nymphs and then emerge together in a brief, region-wide pulse as adults. This flooding of adults overwhelms predators—a strategy known as predator satiation—so enough individuals survive to mate and lay eggs. This timing-based, group-wide emergence is what sets cicadas apart, and it isn’t explained by random or year-round activity. The diurnal timing of activity is separate from this emergent pattern, which is best described by the synchronized arrival of adults.

Cicadas show a striking pattern of mass, synchronized emergence. Many species spend years as underground nymphs and then emerge together in a brief, region-wide pulse as adults. This flooding of adults overwhelms predators—a strategy known as predator satiation—so enough individuals survive to mate and lay eggs. This timing-based, group-wide emergence is what sets cicadas apart, and it isn’t explained by random or year-round activity. The diurnal timing of activity is separate from this emergent pattern, which is best described by the synchronized arrival of adults.