Contents: Introduction to Symposium by James B. Kirkwood. The Atomic Energy Commission's Interest in Bioenvironmental Research by J. J. Davis. Bioenvironmental Studies at Amchitka Island, Alaska by James B. Kirkwood. Physical Climatology of Amchitka Island, Alaska by Robert H. Armstrong. Marine Fishery Resources in the Vicinity of Amchitka Island, Alaska by Theodore R. Merrell, Jr. Studies of Populations of Sea Urchins, "Strongylocentrotus" sp., in Relation to Underground Nuclear Testing at Amchitka Island, Alaska by Louis Barr. The Structure and Origin of the Organic Soil Cover of Amchitka Island, Alaska by K. R. Everett. Dynamics of the Terrestrial Ecosystem Vegetation of Amchitka Island, Alaska by C. C. Amundsen and E. E. C. Clebsch. Dynamics of Raptor Populations on Amchitka Island, Alaska by Clayton M. White, William B. Emison and Francis S. L. Williamson. Geographical Affinities and Migrations of the Avifauna on Amchitka Island, Alaska by W. B. Emison, F. S. L. Williamson and C. M. White. Changes in the Ecology of the Plankton Communities on Amchitka Island, Alaska by Derry D. Koob. Freshwater Food Habits of "Salvelinus malma" (Walbaum) on Amchitka Island, Alaska by John J. Palmisano and William T. Helm. Ecology of Threespine Stickleback "Gasterosteus aculeatus" Linnaeus on Amchitka Island, Alaska by Richard A. Valdez and William T. Helm. Oceanography in the Vicinity of Amchitka Island, Alaska by W. Bruce McAlister. The Coastal Zooplankton around Amchitka Island, Alaska by Ole A. Mathisen and M. A. M. Peck. Spatial and Seasonal Distributions of Marine Algal Communities at Amchitka Island, Alaska by P. A. Lebednik, F. C. Weinmann and R. E. Norris. Transect Studies of Littoral Macrofauna, Amchitka Island, Alaska by C. E. O'Clair and K. K. Chew. Fish Communities and Food Chains in the Amchitka Area by J. S. Isakson, C. A. Simenstad and R. L. Burgner. Observations on the Effect of the Milrow Nuclear Test on Marine Organisms at Amchitka by R. L. Burgner, J. S. Isakson and P. A. Lebednik. Sea Otter Studies in the Vicinity of Amchitka Island by Ronald A. Wright and Wayne H. Allton . Bioenvironmental Surveillance Employing Photogrammetric Techniques by Joachim G. Stephan. The Lowland Stream Ecosystem of Amchitka Island, Alaska by John M. Neuhold. Mathematical Simulation of Sea Otter Population Dynamics Amchitka Island, Alaska by G. E. Raines, S. G. Bloom, P. A. McKee and J. C. Bell. Mathematical Models for Predicting the Transport of Radionuclides in a Marine Environment by S. G. Bloom and G. E. Raines. Ground Shock and Water Pressures from Milrow by Melvin L. Merritt. Variation in the Timing of Breeding and Molt of the Lapland Longspur ("Calcarius lapponicus") in Alaska, with Relation to Differences in Latitude by F. S. L. Williamson and W. B. Emison. Summary of Ecological Effects of Milrow by James B. Kirkwood.