Intro -- Title Page -- Copyrights Page -- Table of Contents -- Foreword -- Preface -- Acknowledgments -- Ch. 1: Living in a Complex World: An Introduction to Resilience Thinking -- Case Study 1: Carving up a National Icon - The Florida Everglades -- Ch. 2: The System Rules: Creating a Mind Space...

The extent of genetic diversity in food crops is important as it affects the risk of attack by pathogens. A drop in diversity increases this risk. Farmers may not take this into account when making crop choices, leading to what from a social perspective is an inadequate level of diversity.

In previous papers we have considered the optimal mix of biodiversity in semi-arid rangelands, focusing on the steady state. This paper addresses the question of conservation in the optimal use of rangelands. That is, it considers the optimal trajectory of biodiversity change. There are two...