"Biodiversity change is the biggest environmental problem of our time. It leads to much more than species extinctions, affecting the food we eat, the diseases we face, our vulnerability to fire and flood, and our ability to adapt to climate change. Our Uncommon Heritage explores the many...

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...