Elements of Ecology, Ninth Edition continues to explain ecological processes clearly and concisely, with a greater emphasis on the relevance of ecology to everyday life and the human impact on ecosystems.This dramatically revised edition discusses issues of human ecology throughout the text and provides a greater variety of opportunities for students to learn, practice, and develop quantitative and analytical skills. Current research examples and other content updates are supported by more than 200 redesigned, full-color illustrations, graphs, and tables. ? Also available with Mastering Biology? This title is also available with Mastering Biology, an online homework, tutorial, and assessment program that improves results by helping students quickly master concepts both in and outside the classroom. The book and Mastering Biology work together to create a classroom experience that enables students to succeed in biology and ecology courses. Note: You are purchasing a standalone product; Mastering Biology does not come packaged with this content. If you would like to purchase both the physical text and Mastering Biology search for ISBN-10: 0321934172/ISBN-13: 9780321934178. That package includes ISBN-10: 0321934180/ISBN-13: 9780321934185 and ISBN-10: 0321976010/ISBN-13: 9780321976017. Mastering Biology should only be purchased when required by an instructor.Elements of Ecology 9th Edition is written by Thomas M. Smith; Robert Leo Smith and published by Pearson. ISBNs for Elements of Ecology are 9780321975966, 0321975960 and the print ISBNs are 9780321934185, 0321934180. Additional ISBNs include 9780321994912, 9780321934178, 9780321994844, 9780321994714.