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Vernal Pools. What? How? Where? Why? . What is a vernal pool?. Vernal is derived from the Latin word for spring A vernal pool is a seasonal pool that is present in the spring and dries up in late spring or summer. February. March. June. November.

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Vernal pools
Vernal Pools

What?

How?

Where?

Why?


What is a vernal pool
What is a vernal pool?

  • Vernal is derived from the Latin word for spring

  • A vernal pool is a seasonal pool that is present in the spring and dries up in late spring or summer

February

March

June

November


How and where

Remnants of lava plateau along Hwy 15 corridor

Surrounding softer geology erodes leaving mesas

Dense; less porous

Examples:

Mira Mesa

Miramar

Santa Rosa Plateau

How and where?


Why are vernal pools important

Sustainability of an unique ecosystem

Fairy Shrimp

Within days, dormant embryos (that can be up to many centuries old) develop into adults

Copepods, Daphnia, other crustaceans, and flatworms

Insects & insect larvae

Aquatic snails

Tadpoles, Frogs, toads

Snakes

Birds

Why are vernal pools important?


Why don t we see more of these

Most vernal pools are gone

Less than 10% remain in Southern California

Human impact

Development

Pollution

…but with a bit of education, protection, and restoration

Why don’t we see more of these?