 The remaining ecological zones , with their progression from shoreline to climax forest , are a classic illustration of the concept of ecological succession . Much of this progression is due to the changing nature of Presque Isle and its shifting shoreline and dunes . The shoreline , the second zone , is formed by wave action and is in equilibrium between erosion and deposition , with the initial plants stabilizing the sand of the new shoreline . The newly formed sandy plain and the ponds formed in it are the third zone . The ponds start as trapped pockets of lake water and can erode away or be filled by wind @-@ blown sand or drifting dunes . The new ponds provide habitat for plants and animals : for example , the state park is home to 89 species of Odonata ( dragonflies and damselflies ) and Lepidoptera , including 35 different butterflies , as well as 84 different sorts of spiders . 
