Download or read book Late glacial and Early Postglacial Vegetation and Climate Change in the Northeastern Great Plains written by Catherine Helen Yansa and published by . This book was released on 2002 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Postglacial Fire Vegetation and Climate History Across an Elevational Gradient in the Northern Rocky Mountains USA and Canada written by Mitchell J. Power and published by . This book was released on 2011 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 13,100-year-long high-resolution pollen and charcoal record from Foy Lake in western Montana is compared with a network of vegetation and fire-history records from the Northern Rocky Mountains. New and previously published results were stratified by elevation into upper and lower and tree line to explore the role of Holocene climate variability on vegetation dynamics and fire regimes. During the cooler and drier Lateglacial period, ca 13,000 cal yr BP, sparsely vegetated Picea parkland occupied Foy Lake as well as other low- and high-elevations with a low incidence of fire. During the warmer early Holocene, from ca 11,000-7500 cal yr BP, low-elevation records, including Foy, indicate significant restructuring of regional vegetation as Lateglacial Picea parkland gave way to a mixed forest of Pinus-Pseudotsuga-Larix . In contrast, upper tree line sites (ca >2000 m) supported Pinus albicaulis and/or P. monticola-Abies-Picea forests in the Lateglacial and early Holocene. Regionally, biomass burning gradually increased from the Lateglacial times through the middle Holocene. However, upper tree line fire-history records suggest several climate-driven decreases in biomass burning centered at 11,500, 8500, 4000, 1600 and 500 cal yr BP. In contrast, lower tree line records generally experienced a gradual increase in biomass burning from the Lateglacial to ca 8000 cal yr BP, then reduced fire activity until a late Holocene maximum at 1800 cal yr BP, as structurally complex mesophytic forests at Foy Lake and other sites supported mixed-severity fire regimes. During the last two millennia, fire activity decreased at low elevations as modern forests developed and the climate became cooler and wetter than before. Embedded within these long-term trends are high amplitude variations in both vegetation dynamics and biomass burning. High-elevation paleoecological reconstructions tend to be more responsive to long-term changes in climate forcing related to growing-season temperature. Low-elevation records in the NRM have responded more abruptly to changes in effective precipitation during the late Holocene. Prolonged droughts, including those between 1200 and 800 cal yr BP, and climatic cooling during the last few centuries continues to influence vegetation and fire regimes at low elevation while increasing temperature has increased biomass burning in high elevations.
Download or read book Early Postglacial Vegetation Development in the Greater Yellowstone Ecosystem written by Teresa Rose Krause and published by . This book was released on 2015 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last glacial-interglacial transition in the western US (20,000-8000 years ago) was a period of rapid environmental change. In the Greater Yellowstone Ecosystem (GYE), much research has focused on postglacial vegetation changes; however, questions still remain regarding the relative trade-off between climate and nonclimatic factors, such as edaphic conditions, disturbance, and biotic interactions, in driving early postglacial vegetation development at finer spatial and temporal scales in the region. This study reconstructed vegetation development in the GYE from the time of ice retreat to the early Holocene insolation maximum (17,000-8000 years ago) at sub-regional and regional scales using fossil pollen data from three sites in the northern GYE and across a regional network of 13 previously published records. Fossil pollen data from lake sediments were compared to independent measures of climate (paleoclimate model simulations, stable isotope data), edaphic conditions (lithologic and geochemical data), and fire activity (charcoal data) to better understand climatic and nonclimatic drivers of early postglacial vegetation development. Climate was the primary driver of early postglacial vegetation development in the GYE. Increasing summer insolation and its direct effects on summer temperature and effective moisture directed changes in vegetation from pioneering herb and shrub communities to spruce parkland during the late-glacial period to subalpine forest and eventually open Douglas-fir forest by the early Holocene summer insolation maximum. Nonetheless, fire activity, site-specific edaphic conditions, and biotic interactions mediated vegetation responses to climate change. Elevated regional fire activity between 12,500 and 10,000 cal yr BP, driven by increasing summer temperatures and fuel biomass, facilitated important ecosystem changes from an Engelmann spruce and subalpine fir dominated system to one dominated by whitebark and lodgepole pine. Site-specific edaphic conditions, namely erosional processes associated with newly deglaciated terrain, inhibited early conifer expansion, and important competitive interactions between lodgepole pine and whitebark pine after the early Holocene limited the range of whitebark pine at middle elevations in the GYE. This research provides new insight into how ecosystems and plant species have responded to past climate change and is critical for better understanding local responses to regional climate change predicted in the coming decades.
Download or read book Second Assessment of Climate Change for the Baltic Sea Basin written by The BACC II Author Team and published by Springer. This book was released on 2015-04-03 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an update of the first BACC assessment, published in 2008. It offers new and updated scientific findings in regional climate research for the Baltic Sea basin. These include climate changes since the last glaciation (approx. 12,000 years ago), changes in the recent past (the last 200 years), climate projections up until 2100 using state-of-the-art regional climate models and an assessment of climate-change impacts on terrestrial, freshwater and marine ecosystems. There are dedicated new chapters on sea-level rise, coastal erosion and impacts on urban areas. A new set of chapters deals with possible causes of regional climate change along with the global effects of increased greenhouse gas concentrations, namely atmospheric aerosols and land-cover change. The evidence collected and presented in this book shows that the regional climate has already started to change and this is expected to continue. Projections of potential future climates show that the region will probably become considerably warmer and wetter in some parts, but dryer in others. Terrestrial and aquatic ecosystems have already shown adjustments to increased temperatures and are expected to undergo further changes in the near future. The BACC II Author Team consists of 141 scientists from 12 countries, covering various disciplines related to climate research and related impacts. BACC II is a project of the Baltic Earth research network and contributes to the World Climate Research Programme.
Download or read book Late Cretaceous and Cenozoic History of North American Vegetation written by Alan Graham and published by Oxford University Press. This book was released on 1999-03-25 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a unique and integrated account of the history of North American vegetation and paleoenvironments over the past 70 million years. It includes discussions of the modern plant communities, causal factors for environmental change, biotic response, and methodologies. The history reveals a North American vegetation that is vast, immensely complex, and dynamic.
Download or read book Bison and People on the North American Great Plains written by Geoff Cunfer and published by Texas A&M University Press. This book was released on 2016-10-25 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near disappearance of the American bison in the nineteenth century is commonly understood to be the result of over-hunting, capitalist greed, and all but genocidal military policy. This interpretation remains seductive because of its simplicity; there are villains and victims in this familiar cautionary tale of the American frontier. But as this volume of groundbreaking scholarship shows, the story of the bison’s demise is actually quite nuanced. Bison and People on the North American Great Plains brings together voices from several disciplines to offer new insights on the relationship between humans and animals that approached extinction. The essays here transcend the border between the United States and Canada to provide a continental context. Contributors include historians, archaeologists, anthropologists, paleontologists, and Native American perspectives. This book explores the deep past and examines the latest knowledge on bison anatomy and physiology, how bison responded to climate change (especially drought), and early bison hunters and pre-contact trade. It also focuses on the era of European contact, in particular the arrival of the horse, and some of the first known instances of over-hunting. By the nineteenth century bison reached a “tipping point” as a result of new tanning practices, an early attempt at protective legislation, and ventures to introducing cattle as a replacement stock. The book concludes with a Lakota perspective featuring new ethnohistorical research. Bison and People on the North American Great Plains is a major contribution to environmental history, western history, and the growing field of transnational history.
Download or read book Evolution of Alluvial Fans in the Pembina Trench in Manitoba Canada written by Justin N. Rogers and published by . This book was released on 2002 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Post glacial Vegetation of Canada written by J. C. Ritchie and published by Cambridge University Press. This book was released on 2004-04 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together all the available information about the complex history of vegetational and environmental change in Canada since the last Ice Age. Professor Ritchie discusses the roles of climactic change, wildfires, diseases, and biological factors in controlling the emerging patterns of new plant growth.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Archaeological Geology of the Archaic Period in North America written by E. Arthur Bettis III and published by Geological Society of America. This book was released on 1995 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Archaic Period is the longest and one of the most transitional of the cultural periods in North America. Its exact date varied across the continent, but it is distinguished from the earlier Paleo-Indian cultures by new styles of projectile points and other artifacts, and from the later prehistor
Download or read book Interhemispheric Climate Linkages written by Vera Markgraf and published by Elsevier. This book was released on 2001-01-25 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a novel approach in the field of global change by presenting a comprehensive analysis of interhemispheric linkages of climate, present and past, and their effects on human societies. The ultimate goal of this interhemispheric integration is to improve our understanding of causes and mechanisms of climate change to enhance our capability in predicting future changes. Given the societal interest in global change issues this book offers a new approach for the integration of global information. It will provide a reference for professional scientists, researchers and graduate students in the fields of climatology, and the earth and environmental sciences. Chapters analyse instrumental atmospheric and oceanic data to address such phenomena as El Nino/Southern Oscillation variability and other climate anomalies such as the Pacific and North Atlantic Oscillation and polar air outbreaks A new systematic methodology is presented that allows objective and verifiable reconstruction of climate fields from sparse data Especially valuable in the context of climate proxy data
Download or read book The Quaternary Period in the United States written by A.R. Gillespie and published by Elsevier. This book was released on 2003-12-17 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews advances in understanding of the past ca. two million years of Earth history - the Quaternary Period - in the United States. It begins with sections on ice and water - as glaciers, permafrost, oceans, rivers, lakes, and aquifers. Six chapters are devoted to the high-latitude Pleistocene ice sheets, to mountain glaciations of the western United States, and to permafrost studies. Other chapters discuss ice-age lakes, caves, sea-level fluctuations, and riverine landscapes. With a chapter on landscape evolution models, the book turns to essays on geologic processes. Two chapters discuss soils and their responses to climate, and wind-blown sediments. Two more describe volcanoes and earthquakes, and the use of Quaternary geology to understand the hazards they pose. The next part of the book is on plants and animals. Five chapters consider the Quaternary history of vegetation in the United States. Other chapters treat forcing functions and vegetation response at different spatial and temporal scales, the role of fire as a catalyst of vegetation change during rapid climate shifts, and the use of tree rings in inferring age and past hydroclimatic conditions. Three chapters address vertebrate paleontology and the extinctions of large mammals at the end of the last glaciation, beetle assemblages and the inferences they permit about past conditions, and the peopling of North America. A final chapter addresses the numerical modeling of Quaternary climates, and the role paleoclimatic studies and climatic modeling has in predicting future response of the Earth's climate system to the changes we have wrought.
Download or read book Transactions American Philosophical Society vol 37 Part 1 1947 written by and published by American Philosophical Society. This book was released on with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Making of the American Landscape written by Michael P. Conzen and published by Routledge. This book was released on 2014-06-03 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only compact yet comprehensive survey of environmental and cultural forces that have shaped the visual character and geographical diversity of the settled American landscape. The book examines the large-scale historical influences that have molded the varied human adaptation of the continent’s physical topography to its needs over more than 500 years. It presents a synoptic view of myriad historical processes working together or in conflict, and illustrates them through their survival in or disappearance from the everyday landscapes of today.
Download or read book The Great Meadow written by Brian Donahue and published by Yale University Press. This book was released on 2004-01-01 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 'The Great Meadow', Brian Donahue examines the farming practices of the early settlers at Concord in Massachusetts. He argues against the long held belief that these farmers used methods that degraded the land & shows how the Concord community in fact achieved a successful & sustainable system.
Download or read book Encyclopedia of Quaternary Science written by Cary Mock and published by Newnes. This book was released on 2013-03-25 with total page 3883 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second revised edition of the Encyclopedia of Quaternary Science, Four Volume Set, provides both students and professionals with an up-to-date reference work on this important and highly varied area of research. There are lots of new articles, and many of the articles that appeared in the first edition have been updated to reflect advances in knowledge since 2006, when the original articles were written. The second edition will contain about 375 articles, written by leading experts around the world. This major reference work is richly illustrated with more than 3,000 illustrations, most of them in colour. Research in the Quaternary sciences has advanced greatly in the last 10 years, especially since topics like global climate change, geologic hazards and soil erosion were put high on the political agenda. This second edition builds upon its award-winning predecessor to provide the reader assured quality along with essential updated coverage Contains 357 broad-ranging articles (4310 pages) written at a level that allows undergraduate students to understand the material, while providing active researchers with a ready reference resource for information in the field. Facilitates teaching and learning The first edition was regarded by many as the most significant single overview of Quaternary science ever, yet Editor-in-Chief, Scott Elias, has managed to surpass that in this second edition by securing even more expert reviews whilst retaining his renowned editorial consistency that enables readers to navigates seamlessly from one unfamiliar topic to the next
Download or read book Ecology and Biogeography of Pinus written by David M. Richardson and published by Cambridge University Press. This book was released on 2000-07-31 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review essential for all involved in the management of natural and planted pine forests.
