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Good Reads  Habitats & Ecosystems  Forests & Wetlands

The Journeys of Trees A Story about Forests, People, and the Future

By: Zach St George(Author)
244 pages, no illustrations
Focusing on five emblematic species, The Journeys of Trees traces the slow-motion movement of forests through deep time while examining current threats and considering their uncertain future.
The Journeys of Trees
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  • The Journeys of Trees ISBN: 9781324020233 Paperback Apr 2022 In stock
  • The Journeys of Trees ISBN: 9781324001607 Hardback Aug 2020 In stock
Selected version: £12.99
About this book Customer reviews Biography Related titles

About this book

An eye-opening investigation into forest migration past and present – and the people fighting to save its uncertain future.

Forests are restless. Any time a tree dies or a new one sprouts, the forest that includes it has shifted. Today, however, an array of obstacles – humans felling trees by the billions, invasive pests transported through global trade – threaten to overwhelm these vital movements. Worst of all, the climate is changing faster than ever before, and forests are struggling to keep up.

A deft blend of science reporting and travel writing, The Journeys of Trees examines the evolving movements of forests by focusing on five types of tree: giant sequoia, ash, black spruce, Florida torreya, and Monterey pine. Journalist Zach St. George reads fossils that show the paths of ancient forests, introduces lively characters on the conservation front lines – such as an ecologist studying droughts and an evolutionary evangelist with plans to save a dying species – and reveals how we can all help our trees, and our planet, survive and thrive.

Customer Reviews (1)

  • A fascinating deep-time road trip
    By Leon (NHBS Catalogue Editor) 15 Sep 2020 Written for Hardback

    We tend to think of forests as static. Trees, after all, do not move. But that is a perspective foisted upon us by our limbed existence. Science reporter Zach St. George unmasks this illusion in plain terms: when trees die or new ones sprout, the forest has moved a bit. “The migration of a forest is just many trees sprouting in the same direction.” (p. 2)

    There is no shortage of books on trees, but this sounded like such an unusual take on the subject that I was utterly stoked when I learned of The Journeys of Trees. A journalist who delves into the palaeontological record to consider the slow-motion of movement of forests over deep time? Get in here!

    The question of where in space and time organisms live where they do, and don’t where they do not, is the purview of the academic discipline of biogeography. St. George’s handling of ecological concepts here is excellent, especially when considering the many unknown factors that keep a tree from growing somewhere, or his clear breakdown of different niche concepts (his description of Hutchinson’s fundamental niche as a multidimensional hypervolume is fascinating). He traces the interest in questions of biogeography back to 18th-century naturalists such as Alexander von Humboldt, Asa Gray, and Darwin and Wallace. It was not just dinosaurs that fossil hunters unearthed, but also fossil trees, revealing that they had grown in places they now no longer did.

    There are spine-tingling peeks into the deep past sprinkled throughout this book. Giant sequoias – now restricted to a few groves in North America – once towered over trees from Alaska to Europe while the quintessentially British oak spend the Pleistocene ice age in Spain and France. He mentions the ecological anachronisms of plants that have become marooned when their pollinators went extinct. Or, and this one blew my mind, the striking pattern seen in forest invasions. Time and again, tree species on one continent succumb to insects or fungi native to their sister species on another continent. This hints at the boreal forest that once ringed the globe at northern latitudes and connected these forests. As St. George explains, each continent now has it own oaks, maples, chestnuts, pines, etc. evolving separately, but their shared history is recent enough that they are still vulnerable to each other’s pathogens and pests.

    Through these examples, St. George cultivates a mindset that Marcia Bjornerud has called “timefulness”. For me, this is the rare, vertigo-inducing sensation where you find yourself peering down the yawning chasm of deep time and, for just a fleeting moment, connect with its incomprehensible vastness. Not many books manage to induce this and I would have happily had St. George discuss nothing but palaeobiogeography. However, there are two important topics linked to the present and the future that almost eclipse his writing on the ghosts of the past: the burden of invasive species and the question of forest conservation in the face of future climate change.

    Plants do not just move themselves, we are increasingly doing the moving for them. While naturalists and geologists were still getting to grips with the age of the Earth and concepts such as biogeography, the Industrial Revolution was busy producing its legacy of Victorian plant hunters filling up botanical gardens and private collections in Europe, and entrepreneurs moving trees to improve colonies overseas. One such thread that St. George follows here is the story of how the Monterey pine growing in California and Mexico ended up blanketing New Zealand.

    But each such translocation is an experiment. We take species out of their evolutionary context at our peril. Each journey that moves plants, wood, or even soil brings the risk of unwanted stowaways. Only a minority of translocated species become a problem, but with global trade and travel having increased exponentially, so have the risks posed by invasive species. A recent example recounted here that came to light only in 2001 is the decimation of North America’s ash trees when they fell victim to the emerald ash borer, a small beetle imported from Asia, possibly in pallet wood.

    As St. George highlights, it is exactly this legacy of species invasions that is now causing great tension in the academic and conservation communities when considering the future of the world’s forests. As the deep-time perspective of The Journeys of Trees already reveals, forest migration is closely linked to climate change, and there is plenty of that in store, with St. George highlighting the risk of exacerbated droughts and fires in particular. One difference with past climate change is that in the geologically speaking short intervening time we have laid claim to vast swathes of the Earth’s surface, largely deforesting it.

    Thus, the third and final important form of forest migration that St. George considers here are the conservation initiatives taking matters in their own hands by planting trees in new areas, often in the face of caution urged by ecologists. This varies from “assisted population migration” where trees are planted in their current range, to forward-looking initiatives better labelled “assisted range expansion” where they are planted outside of the current species’ range. St. George discusses Connie Barlow’s Torreya Guardians project that is planting Florida torreya all over North America, and the living seed bank of giant sequoias created by timber company Sierra Pacific Industries.

    The flap text on the dust jacket mentions that the book focuses on five trees, but the story defies any rigid or chronological organisation, looping round in circles and delightfully intersecting its own narrative in numerous places. Much as I had hoped, The Journeys of Trees ended up being a fascinating sylvan road trip that sets itself apart from the many books written on trees, not least by its deep-time perspective.
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Zach St. George is a science writer whose work has appeared in the Atlantic, Scientific American, and Outside, among other publications. He earned a degree in journalism from the University of California, Berkeley, and lives in Oakland, California.

By: Zach St George(Author)
244 pages, no illustrations
Focusing on five emblematic species, The Journeys of Trees traces the slow-motion movement of forests through deep time while examining current threats and considering their uncertain future.
Media reviews

"I was once asked by a scientist, 'Are you ready to put a sprinkler system on the giant sequoias?' Zach St. George takes us on a journey to understand why this question is so important and the answer so complex."
– Jonathan Jarvis, former director of the National Park Service and coauthor of The Future of Conservation in America

"These stories vividly evoke the deep bonds between people and trees. In the paradoxical, surprising journeys of trees is writ the sylvan future of forests and cities alike."
– David George Haskell, author of The Forest Unseen

"A thoughtful and timely meditation on how our changing world disrupts the bonds between trees, the lands they root in, and the people whose lives they nourish – and what we might do about it."
– Sonia Shah, author of Pandemic and The Next Great Migration

"An elegant – and urgent – paean to trees."
– Jim Robbins, author of The Man Who Planted Trees

"This captivating book makes deep acquaintance with five species of tree, revealing that life is constantly on the move and nature needs space to survive. Forests, it turns out, migrate across vast dimensions of space and time, engaged in an invisible ballet Zach St. George helps us to see."
– Mary Ellen Hannibal, author of Citizen Scientist

"How does a tree travel? From that seemingly koan-like question, Zach St. George creates an illuminating, enchanting, and occasionally alarming portrait of an earth in flux. I will treasure this book long into our uncertain future."
– Robert Moor, author of On Trails

"A beautiful elegy to trees and the people working to preserve them. This compelling read shows how climate change impacts the natural ranges of tree species and how scientists are creating strategies to mitigate this influence."
Library Journal

"A fascinating, eloquent, and often surprisingly funny journey into the troubled relationship between people and trees in a future that is now. This is the smartest book yet on how to think and live in the age of climate change."
– J. B. MacKinnon, author of The Once and Future World

"[A] rumination, backed by in-depth reporting, on the current state of North America's forests. [...] the extraordinary scientists [St. George] features here do give hope that their nuanced work [...] will be taken seriously enough to repair, even avert, catastrophic change."

"A deeply researched book that is liable to change your perspective on the magnificent, tall, woody creatures that cover one-third of the Earth's land [...] [St. George] brings a flair for gathering and distilling esoteric scientific findings into lively, accessible explanations."
Wall Street Journal

"A thoughtful and timely meditation on how our changing world disrupts the bonds between trees, the lands they root in, and the people whose lives they nourish – and what we might do about it."
– Sonia Shah, author of Pandemic and The Next Great Migration

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