Bøker av Callum Roberts

In this revelatory book, Callum Roberts uses his lifetime's experience working with the oceans to show why they are the most mysterious places on earth, their depths still largely unexplored. In The Ocean of Life we get a panoramic tour beneath the seas: Why do currents circulate the way do? Where exactly do they go? How has the chemistry of the oceans changed? How polluted are we making them? Above all, Roberts reveals the richness of their life, and how it has altered over the centuries. The oceans are now under unprecedented threat. Not only does Roberts show how we are fishing our oceans to extinction, crucially, he explains how this directly affects our lives on land. Ninety-five percent of habitable space on earth lies in the oceans, and marine plants produce half the world's oxygen; the oceans themselves absorb vast quantities of carbon dioxide. The life they support is now in the balance.The Ocean of Life should galvanise debate worldwide. Roberts shows how we can arrest and reverse the damage we are doing. Tantalisingly, it is within our grasp to restore the life of the oceans. There is still time.

Humanity can make short work of the oceans' creatures. In 1741, hungry explorers discovered herds of Steller's sea cow in the Bering Strait, and in less than thirty years, the amiable beast had been harpooned into extinction. It's a classic story, but a key fact is often omitted. Bering Island was the last redoubt of a species that had been decimated by hunting and habitat loss years before theexplorers set sail. As Callum M. Roberts reveals in The Unnatural History of the Sea, the oceans' bounty didn't disappear overnight. While today's fishing industry is ruthlessly efficient, intense exploitation began not in the modern era, or even with the dawn of industrialization, but in the eleventh century in medieval Europe. Roberts explores this long and colorful history of commercial fishing, taking readers around the world and through the centuries to witness the transformation of the seas.Drawing on firsthand accounts of early explorers, pirates, merchants, fishers, and travelers, the book recreates the oceans of the past: waters teeming with whales, sea lions, sea otters, turtles, and giant fish. The abundance of marine life described by fifteenth century seafarers is almunimaginable today, but Roberts both brings it alive and artfully traces its depletion. Collapsing fisheries, he shows, are simply the latest chapter in a long history of unfettered commercialization of the seas. The story does not end with an empty ocean. Instead, Roberts describes how we might restore the splendor and prosperity of the seas through smarter managemof our resources and some simple restraint. From the coasts of Florida to New Zealand, marine reserves have fostered spectacular recovery of plants and animals to levels not seen in a century. They prove that history need not repeat itself: we can leave the oceans richer than we found them.