Sea otters don’t eat algae. And yet, their diet influences the abundance of seaweed. How? Indirectly. Sea otters eating sea urchins (spiky animals in the same class as sea stars) eating kelp has become a textbook example of a trophic cascade, and Serendipity is a first-hand account by ecologist James A. Estes of how this happened. A trophic cascade refers to the indirect effects that ripple through a food web as a result of, for example, a predator consuming its prey. Simultaneously, the book is a searingly open account of how science is done, how ideas change, and how fortuitous events can suddenly send your research programme off in a whole new direction.
Wildlife conservation and field biology are not for the faint of heart. Studying wild animals in their natural habitat brings with it long periods away from home, lack of comfort, and many logistical challenges. It calls for a certain kind of grit. But equally, it requires a persistent mindset to fight the cause of wildlife when conservation clashes with company’s bottom lines, political aspirations, and the wants and needs of an expanding world population. Even amongst this hardened bunch, few people would voluntarily venture into icy wastelands to study the animals existing at the edge of the world. Joel Berger is one of them and Extreme Conservation is his story, equal parts adventure narrative as it is a meditation on the value of wild nature.