Essentials of Ecology, 4th Edition presents introductory ecology in an accessible, state-of-the-art format designed to cultivate the novice student's understanding of and fascination with the natural world. In a concise, engaging style, this text outlines the essential principles of ecology from the theoretical fundamentals to their practical applications. Full color artwork, simple pedagogical features and a wide range of carefully-chosen examples make this book an ideal introduction to ecol...

The nature can be cruel because it cleans up its weak animals. We now know that the strongest individuals of a species in nature evolve through an admirable adaptability and reproduce.

Birds in cages, poultry, pigs, cows and fish live in captivity. This book describes how caged birds and livestock diseases develop to a greater extent, which can also be transmitted to humans. The expansion in the intensive livesto...