
By their very nature Vernal Pools are ephemeral; melt water forms them and then, by mid or late summer they have dried up, to remain dry until the following spring. This is important to the life that uses Vernal Pools because it means that there are no fish to eat the exposed eggs of frogs or salamanders or their delicate larval forms. The pool jumps to life in the spring and by midsummer most of it has developed through the aquatic part of their life cycles and left. The survivors return in the spring to start the process over again.
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