Tree Line

Poetry. "Robert Frost believed a poem should begin in delight and end in wisdom, but in TREE LINE, Judy Halebsky proves a poet never has to choose between the two her poems begin in both and end in both. Smart, sexy, thoughtful, and beautiful, Halebsky's lyrics are a masterful marriage of tradition and innovation. This remarkable book loves many things language and landscape to be sure but most of all, it loves this world and how we make our way in it." Dean Rader"

Alpine treelines mark the low-temperature limit of tree growth and occur in mountains world-wide. Presenting a companion to his book Alpine Plant Life, Christian Körner provides a global synthesis of the treeline phenomenon from sub-arctic to equatorial latitudes and a functional explanation based on the biology of trees. The comprehensive text approaches the subject in a multi-disciplinary way by exploring forest patterns at the edge of tree life, tree morphology, anatomy, climatology and, based on this, modelling treeline position, describing reproduction and population processes, development, phenology, evolutionary aspects, as well as summarizing evidence on the physiology of carbon, water and nutrient relations, and stress physiology. It closes with an account on treelines in the past (palaeo-ecology) and a section on global change effects on treelines, now and in the future. With more than 100 illustrations, many of them in colour, the book shows alpine treelines from around the globe and offers a wealth of scientific information in the form of diagrams and tables.

For a traveler on the black ribbons of highways that stretch across the Great Plains, the sight of the Rocky Mountains rising up in the west is a majestic o the treeless peaks shimmer in winter with a white mantle of snow and, in summer, seem to erupt through the green belt of vegetation encircling the lower slopes. Colorado Above Treeline brings the state's highest country well within your reach. Author Jeremy Agnew describes what defines the tundra, the history that has marked it, and the kinds of plants and creatures that inhabit this unique environment. He then leads you on trips to these open, remote expanses, including scenic drives, rugged 4WD routes, and classic hikes, along the way offering many opportunities for further exploration. Practical information, fullcolor photographs and maps, and alpine anecdotes round out this introduction to some of Colorado's most celebrated scenery. Book jacket.

Winner of the 2023 Helen Bernstein Book Award for Excellence in Journalism "Original and readable." ―Financial Times' Best Environmental Books of 2022 "Superb, inspiring." ―Winner, National Academies of Science Schmidt Awards for Excellence in Science Communications “Illuminating.” —Silver Medalist, National Outdoor Book Awards Longlisted for the American Library Association's 2023 Carnegie Medal for Excellence in Nonfiction Finalist, 2023 Banff Mountain Book Competition Finalist, 2023 Dayton Literary Peace Prize In the tradition of Elizabeth Kolbert and Barry Lopez, a powerful, poetic and deeply absorbing account of the “lung” at the top of the world. For the last fifty years, the trees of the boreal forest have been moving north. Ben Rawlence's The Treeline takes us along this critical frontier of our warming planet from Norway to Siberia, Alaska to Greenland, Canada to Sweden to meet the scientists, residents and trees confronting huge geological changes. Only the hardest species survive at these latitudes including the ice-loving Dahurian larch of Siberia, the antiseptic Spruce that purifies our atmosphere, the Downy birch conquering Scandinavia, the healing Balsam poplar that Native Americans use as a cure-all and the noble Scots Pine that lives longer when surrounded by its family. It is a journey of wonder and awe at the incredible creativity and resilience of these species and the mysterious workings of the forest upon which we rely for the air we breathe. Blending reportage with the latest science, The Treeline is a story of what might soon be the last forest left and what that means for the future of all life on earth.

The alpine treeline ecotone (ATE) is an area of transition high on mountains where closed canopy forests from lower elevations give way to the open alpine tundra and rocky expanses above. Alpine tundra is an island biome and its ecotone with forest is subject to change, and like oceanic islands, alpine tundra is subject to invasion – or the upward advance of treeline. The invasion of tundra by trees will have consequences for the tundra biome as invasion does for other island flora and fauna. To examine the invasibility of tundra we take a plant’s-eye-view, wherein the local conditions become extremely important. Among these local conditions, we find geomorphology to be exceptionally important. We concentrate on aspects of microtopography (and microgeomorphology) and microclimate because these are the factors that matter: from the plant’s-eye-view, but we pay attention to multiple scales. At coarse scales, snow avalanches and debris flows are widespread and create “disturbance treelines whose elevation is well below those controlled by climate. At medium scales, turf-banked terraces create tread-and-riser topography that is a difficult landscape for a tree seedling to survive upon because of exposure to wind, dryness, and impenetrable surfaces. At fine scales, turf exfoliation of the fronts of turf-banked risers, and boulders, offer microsites where tree seedlings may find shelter and are able to gain a foothold in the alpine tundra; conversely, however, surfaces of needle-ice pans and frost heaving associated with miniature patterned ground production are associated with sites inimical to seedling establishment or survival. We explicitly consider how local scale processes propagate across scales into landscape patterns. The objective of this book is to examine the controls on change at alpine treeline. All the papers are focused on work done in Glacier National Park, Montana, USA. Although any one place is limiting, we are able to examine the alpine treeline here in some detail – and an advantage is that the treeline ecotone in Glacier National Park is quite variable in itself due to the underlying variability in geomorphology at multiple scales. This book will provide insights into an important ecological phenomenon with a distinctly geomorphic perspective. The editors collectively have over 100 years of experience in working in geomorphology, biogeography, and ecology. They also have each worked on research in Glacier National Park for several decades. The book will be a reference for a variety of professionals and students, both graduate and undergraduate, with interests in Physical Geography, Geomorphology, Ecology, and Environmental Science. Because of the importance of the alpine treeline ecotone for recreation and aesthetic interests in mountain environments, wildland and park managers will also use this book. * Subject matter: geomorphology at alpine treeline * Expertise of contributors: each editor brings over 25 years of experience in studies of ecotones and geomorphology, and collectively over 100 years of experience in Glacier National Park * Changing alpine treeline examines climate change

This book brings together comprehensive multi-disciplinary knowledge on diverse aspects of the Himalayan treeline ecotone which is considered one of the most sensitive ecosystems to climate change. The contents of this book are based on the results of extensive research and provide a holistic understanding of the treeline ecotone in Himalaya. The book will serve as an important reference manual and a textbook on treeline ecology. The book is unique in the sense that it provides an engaging account of almost all the aspects of the treeline ecotone, such as taxonomic, functional and phylogenetic species diversity, temperature lapse rates, tree phenology, water relations, and stress physiology, tree ring width chronology, and climate relationships and the role of treeline ecotone in human sustenance in the Indian Himalayan region The treelines in the Himalaya, being the highest in the Northern Hemisphere (up to 4900 m), are among the least investigated systems and hence this book is timely and fills all-important knowledge gaps vis-à-vis treeline shifts, physiognomic, structural, and functional changes in mountain landscapes and ecosystems, particularly under the changing climate This book, for the first time, summarizes evidence-based knowledge about various aspects of treeline ecotone in Himalaya that was largely generated through a well-coordinated a team science approach. The book will be of interest to ecologists, climatologists, dendrochronologists, foresters, plant physiologists and resource managers and policy planners for a better understanding of the organization and dynamics of this fragile ecosystem in relation to climate change and other anthropogenic stresses that are rampant in the Himalaya. The book lays a solid foundation for further investigation of the ecology and dynamics of the treeline ecotone in the Himalayas and provides a rationale for pursuing a team science approach for macroecological investigations.

New Zealand's alpine environment is challenging, not only for the humans who explore it but for the plants and animals that inhabit it. The extremes of temperature, short summers and high rates of erosion make for an uncertain environment, and the flora and fauna have evolved and adapted to it in interesting ways. Above the Treeline: A nature guide to the New Zealand mountains is a guide to the natural history of these fascinating ecosystems. It is the first book to be published that brings together the range of flora and fauna that inhabit the alpine environment. As well as our unique alpine plants, which constitute the majority of the book, this guide includes birds; frogs and lizards; butterflies, moths, grasshoppers, beetles and other invertebrates; and mosses and lichens. An informative introduction is followed by descriptions of more than 850 species, illustrated by approximately 1000 colour photographs. Written by eminent botanist and conservationist Sir Alan Mark, . . .

To the charity workers, Dabaab refugee camp is a humanitarian crisis; to the Kenyan government, it is a 'nursery for terrorists'; to the western media, it is a dangerous no-go area; but to its half a million residents, it is their last resort. Situated hundreds of miles from any other settlement, deep within the inhospitable desert of northern Kenya where only thorn bushes grow, Dadaab is a city like no other. Its buildings are made from mud, sticks or plastic, its entire economy is grey, and its citizens survive on rations and luck. Over the course of four years, Ben Rawlence became a first-hand witness to a strange and desperate limbo-land, getting to know many of those who have come there seeking sanctuary. Among them are Guled, a former child soldier who lives for football; Nisho, who scrapes an existence by pushing a wheelbarrow and dreaming of riches; Tawane, the indomitable youth leader; and schoolgirl Kheyro, whose future hangs upon her education. In City of Thorns, Rawlence interweaves the stories of nine individuals to show what life is like in the camp and to sketch the wider political forces that keep the refugees trapped there. Rawlence combines intimate storytelling with broad socio-political investigative journalism, doing for Dadaab what Katherinee Boo's Behind the Beautiful Forevers did for the Mumbai slums. Lucid, vivid and illuminating, City of Thorns is an urgent human story with deep international repercussions, brought to life through the people who call Dadaab home.