Download or read book Degrees of Disaster written by Jeff Wheelwright and published by . This book was released on 1994 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Animal populations rise and fall; variability and patchiness are the rule. The factors that cause biological change are numerous and overlapping and often can't be sorted out in spite of the best efforts of scientists. But an ecosystem such as Prince William Sound readily recovers from disturbances in part because the disturbances are so routine.