Vernal pools: Rains bring to life mini-ecosystem
Alongside auto wrecking yards and shipping centers off state Route 905, a pop-up world has emerged with some of the strangest creatures to swim in six inches of water. Here aquatic plants grow next to cacti, and animals that have waited for decades in the dust come to life. In this Otay Mesa preserve are some of San Diego’s vernal pools, fleeting water bodies that appear and vanish over the course of a season.