How do branchiopod resting eggs help species survive drought?

Branchiopod resting eggs are a critical adaptation that allows these crustaceans to survive periods of drought, such as the drying of temporary pools.12

These eggs are characterized by their remarkable resistance to harsh environmental conditions. When faced with stressors like food scarcity or sudden temperature changes, some branchiopods produce fertilized eggs that are capable of withstanding freezing or complete desiccation. In many species, these eggs can remain dormant in a dry state for long periods, sometimes lasting for several years.1

This dormancy ensures the survival of the species by allowing them to bypass unfavorable conditions. Once environmental conditions become favorable again—such as when a pool refills with water—the resting eggs hatch, allowing the population to re-emerge and continue its life cycle. Many species that inhabit temporary waters rely exclusively on these resting eggs to persist through recurring dry seasons.132