FIG. 46.12 Three different types of survivorship curve. Sources: a. Data from R. Pearl, 1978, The Biology of Population Growth, 3rd ed., North Stratford, NH: Ayer Company Publishers; b. data from E. S. Deevey, Jr., 1947, “Life Tables for Natural Populations of Animals,” Quarterly Review of Biology 22:283–314; c. data from J. E. Kaldy and K. H. Dunton. “Ontogenetic Photosynthetic Changes, Dispersal and Survival of Thalassia testudinum (Turtlegrass) Seedlings in a Sub-tropical Lagoon,” Journal of Experimental Marine Biology and Ecology 240(2):193–212.