Over the past four billion years of Earth's history, three organisms-cyanobacteria, plants, and humans--have altered the planet in profound ways by harnessing the availability of five key elements. Hydrogen, oxygen, carbon, nitrogen, and phosphorus are the most common elements in all forms of life on Earth, and all five circulate between the biotic and abiotic world in biogeochemical cycles. When organisms tap into stores of these elements and change these cycles, they change the atmosphere, climate, and, by extension, the trajectory of life on earth. In the first part of the book, Porder explains how cyanobacteria and plants harnessed critical elements and how their success in doing so was followed by environmental collapse in the form of ice ages. Porder then turns to human-caused climate change. He explores the dramatic ways humans have altered the cycles of these five essential elements and explains the profound effect our actions have on the planet. Porder concludes by exploring how we can reduce our impact on the Earth-both individually and societally-by reorienting ourselves toward recycling critical elements instead of extracting them from more and more obscure sources. Ultimately, understanding the role of element cycling is essential to understanding how humans came to be so successful and to putting us on a path to a sustainable future"--
An ecologist explores how life itself shapes Earth using the elemental constituents we all share It is rare for life to change Earth, yet three organisms have profoundly transformed our planet over the long course of its history. Elemental reveals how microbes, plants, and people used the fundamental building blocks of life to alter the climate, and with it, the trajectory of life on Earth in the past, present, and future. Taking readers from the deep geologic past to our current era of human dominance, Stephen Porder focuses on five of life’s essential elements—hydrogen, oxygen, carbon, nitrogen, and phosphorus. He describes how single-celled cyanobacteria and plants harnessed them to wildly proliferate across the oceans and the land, only to eventually precipitate environmental catastrophes. He then brings us to the present, and shows how these elements underpin the success of human civilization, and how their mismanagement threatens similarly catastrophic unintended consequences. But, Porder argues, if we can learn from our world-changing predecessors, we can construct a more sustainable future. Blending conversational storytelling with the latest science, Porder takes us deep into the Amazon, across fresh lava flows in Hawaii, and to the cornfields of the American Midwest to illuminate a potential path to sustainability, informed by the constraints imposed by life’s essential elements and the four-billion-year history of life on Earth.
The dramatic story of the dazzling growth of London in the sixteenth century. For most, England in the sixteenth century was the era of the Tudors, from Henry VII and VIII to Elizabeth I. But as their dramas played out at court, England was being transformed economically by the astonishing discoveries of the New World and of direct sea routes to Asia. At the start of the century, England was hardly involved in the wider world and London remained a gloomy, introverted medieval city. But as the century progressed something extraordinary happened, which placed London at the center of the world stage forever. Stephen Alford's evocative, original new book uses the same skills that made his widely-praised The Watchers so successful, bringing to life the network of merchants, visionaries, crooks, and sailors who changed London and England forever. In a sudden explosion of energy, English ships were suddenly found all over the world--trading with Russia and the Levant, exploring Virginia and the Arctic, and fanning out across the Indian Ocean. The people who made this possible--the families, the guild members, the money-men who were willing to risk huge sums and sometimes their own lives in pursuit of the rare, exotic, and desirable--are as interesting as any of those at court. Their ambitions fueled a new view of the world--initiating a long era of trade and empire, the consequences of which still resonate today.
2009 Outstanding Academic Title, Choice This acclaimed textbook is the most comprehensive available in the field of forest ecology. Designed for advanced students of forest science, ecology, and environmental studies, it is also an essential reference for forest ecologists, foresters, and land managers. The authors provide an inclusive survey of boreal, temperate, and tropical forests with an emphasis on ecological concepts across scales that range from global to landscape to microscopic. Situating forests in the context of larger landscapes, they reveal the complex patterns and processes observed in tree-dominated habitats. The updated and expanded second edition covers • Conservation • Ecosystem services • Climate change • Vegetation classification • Disturbance • Species interactions • Self-thinning • Genetics • Soil influences • Productivity • Biogeochemical cycling • Mineralization • Effects of herbivory • Ecosystem stability
Thank you for visiting our website. Would you like to provide feedback on how we could improve your experience?
This site does not use any third party cookies with one exception — it uses cookies from Google to deliver its services and to analyze traffic.Learn More.