Vernal Pools

What are vernal pools and why should we study them?

Vernal Pools are very special habitats, defined as temporary to semi-permanent wetlands, without predatory fish, that provide breeding habitat for fairy shrimp, salamanders, and/or wood frogs. Vernal pools are also used for feeding and resting by a diversity of other animals, such as spring peepers and gray tree frogs. more

In addition to being vital habitat for local plants and animals, vernal pools are important landscape features. If we think of them as wetland islands in a sea of upland forests, we see that groups of pools form stepping stones of hospitable habitat along which wetland-dependant wildlife may travel.

Many vernal pool species in northeastern North America are already on state endangered and threatened species lists. At present, vernal pools have little protection-we need more information to justify special protection.

What is the role of the VIP Monitor?

Volunteers will measure the size and depth of the vernal pool, note the surrounding habitat, obtain or draw maps showing the pool's location, measure water temperature, and check for the presence of indicator species and/or egg masses.

Monitors may also measure ph, conductivity, and dissolved oxygen levels. Photos may also be taken.

Monitors will record data at least three times during the field season and forward that information to Professor Aram Calhoun, of the University of Maine.

What do I need to do before the field season starts?

First, let us know that you will be monitoring this season. Remember, if you do not own the property where the pool is, you must obtain landowner permission before you begin monitoring. Please use the form provided and mail it to Maine Audubon.