Experimental Array:

In 2003 - 2004, we established four replicate experimental arrays at each of the regional study sites: 1) Maine; 2) Missouri; and 3) South Carolina.

In Maine, the experimental arrays were centered on existing vernal pools. The terrestrial habitat adjacent to each vernal pool was divided into four equal-sized quadrants. The radius of the array, measured from the edge of the wetland, is 164 m, a distance based on the terrestrial habitat needs of salamander populations (Semlitsch 1998). Each quadrant was randomly assigned a different treatment:

  1. a clearcut with coarse woody debris (CWD) removed,
  2. a clearcut with CWD retained,
  3. a partial harvest with 50% of the tree canopy removed or,
  4. an uncut forest control.

Target Species:

Wtihin each region, three amphibian species were selected for demographic and behavioral studies. The species were selected to encompass important differences in life histories. In Maine, we are examining northern leopard frogs (Rana pipiens), wood frog (Rana sylvatica), and spotted salamanders (Ambystoma maculatum).

Key Components of Project:

  • Adult Migratory Success
  • Juvenile Migratory Success
  • Postmetamorphic Survival





Aerial photo of Smith LEAP array


David Patrick and Sean Blomquist examine a juvenile wood frog


South Chemo vernal pool prior to harvesting


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