Postglacial Vegetation Dynamics at High Elevation from Fairy Lake in the Northern Greater Yellowstone Ecosystem, Montana, USA

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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Postglacial Vegetation Dynamics at High Elevation from Fairy Lake in the Northern Greater Yellowstone Ecosystem, Montana, USA by : James V. Benes

Download or read book Postglacial Vegetation Dynamics at High Elevation from Fairy Lake in the Northern Greater Yellowstone Ecosystem, Montana, USA written by James V. Benes and published by . This book was released on 2019 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The postglacial vegetation and fire history of the Greater Yellowstone Ecosystem is known from low and middle elevations, but little is known about high elevations. Paleoecologic data from Fairy Lake in the Bridger Range, southwestern Montana, provide a new high-elevation record that spans the last 15,000 yr. The records suggest a period of tundra-steppe vegitation prior to ca. 13,700 cal yr BP was followed by open Picea forest at ca. 11,200 cal yr BP. Pinus-Pseudotsuga parkland was present after ca. 9200 cal yr BP, when conditions were warmer-drier than presernt. It was replaced by mixed-conifer parkland at ca. 5000 cal yr BP. Present-day subalpine forest established at ca. 2800 cal yr BP. Increased avalanche or mass-wasting aactivity during the early late-glacial period, the Younger Dryas chronozone, and Neoglaciation suggest cool, wet periods. Sites at different elevations in the region show (1) sunchronous vegetation responses to late-glacial warming; (2) widespread xerothermic forests and frequent fires in the early-to-middle Holocene; and (3) a trend to forest closure during late-Holocene colling. Conditions in the Bridger Range were, however, wetter than other areas during the early Holocene. Across the Northern Rockies, postglacial warming progressed from west to east, reflecting range-specific responses to insolation-driven changes in climate.

Ecological Dynamics on Yellowstone's Northern Range

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Publisher : National Academies Press
ISBN 13 : 0309083451
Total Pages : 199 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Ecological Dynamics on Yellowstone's Northern Range by : National Research Council

Download or read book Ecological Dynamics on Yellowstone's Northern Range written by National Research Council and published by National Academies Press. This book was released on 2002-02-01 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecological Dynamics on Yellowstone's Northern Range discusses the complex management challenges in Yellowstone National Park. Controversy over the National Park Service's approach of "natural regulation" has heightened in recent years because of changes in vegetation and other ecosystem components in Yellowstone's northern range. Natural regulation minimizes human impacts, including management intervention by the National Park Service, on the park ecosystem. Many have attributed these changes to increased size of elk and other ungulate herds. This report examines the evidence that increased ungulate populations are responsible for the changes in vegetation and that the changes represent a major and serious change in the Yellowstone ecosystem. According to the authors, any human intervention to protect species such as the aspen and those that depend on them should be prudently localized rather than ecosystem-wide. An ecosystem-wide approach, such as reducing ungulate populations, could be more disruptive. The report concludes that although dramatic ecological change does not appear to be imminent, approaches to dealing with potential human-caused changes in the ecosystem, including those related to climate change, should be considered now. The need for research and public education is also compelling.

Early Postglacial Vegetation Development in the Greater Yellowstone Ecosystem

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ISBN 13 :
Total Pages : 1104 pages
Book Rating : 4.:/5 (915 download)

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Book Synopsis Early Postglacial Vegetation Development in the Greater Yellowstone Ecosystem by : Teresa Rose Krause

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.

Patterns of Terrestrial and Limnologic Development in the Northern Greater Yellowstone Ecosystem (USA) During the Late-glacial/early-Holocene Transition

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ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Patterns of Terrestrial and Limnologic Development in the Northern Greater Yellowstone Ecosystem (USA) During the Late-glacial/early-Holocene Transition by : Teresa R. Krause

Download or read book Patterns of Terrestrial and Limnologic Development in the Northern Greater Yellowstone Ecosystem (USA) During the Late-glacial/early-Holocene Transition written by Teresa R. Krause and published by . This book was released on 2015 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-resolution record of pollen, charcoal, diatom, and lithologic data from Dailey Lake in southwestern Montana describes postglacial terrestrial and limnologic development from ice retreat ca. 16,000 cal yr BP through the early Holocene. Following deglaciation, the landscape surrounding Dailey Lake was sparsely vegetated, and erosional input into the lake was high. As summer insolation increased and ice recessional processes subsided, Picea parkland developed and diatoms established in the lake at 13,300 cal yr BP. Closed subalpine forests of Picea, Abies, and Pinus established at 12,300 cal yr BP followed by the development of open Pinus and Pseudotsuga forests at 10,200 cal yr BP. Increased planktic diatom abundance indicates a step-like warming at 13,100 cal yr BP, and alternations between planktic and tychoplankic taxa suggest changes in lake thermal structure between 12,400 and 11,400 cal yr BP. An increasingly open forest, in combination with increased benthic diatoms, indicates warm dry summers during the early Holocene after 11,400 cal yr BP, in contrast to nearby records in northern Yellowstone that register prolonged summer-wet conditions until ca. 8000 cal yr BP. Because of its low elevation, Dailey Lake was apparently sensitive to the direct effects of increased summer insolation on temperature and effective moisture, registering dry summers. In contrast, higher elevations in northern Yellowstone responded to the indirect effects of an amplified seasonal insolation cycle on atmospheric circulation, including elevated winter snowpack and/or increased summer convective storms as a result of enhanced monsoonal circulation.

The Greater Yellowstone Ecosystem

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Publisher : Yale University Press
ISBN 13 : 9780300059274
Total Pages : 452 pages
Book Rating : 4.0/5 (592 download)

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Book Synopsis The Greater Yellowstone Ecosystem by : Robert B. Keiter

Download or read book The Greater Yellowstone Ecosystem written by Robert B. Keiter and published by Yale University Press. This book was released on 1994-04-05 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1872, Congress designated Yellowstone National Park as the world's first National Park. In this book, various experts in science, economics and law discuss key resource management issues in the greater Yellowstone ecosystem, and how humans should interact with the environment of this area.

Post-fire Vegetation and Climate Dynamics in Low-elevation Forests Over the Last Three Millennia in Yellowstone National Park

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ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Post-fire Vegetation and Climate Dynamics in Low-elevation Forests Over the Last Three Millennia in Yellowstone National Park by : M. Allison Stegner

Download or read book Post-fire Vegetation and Climate Dynamics in Low-elevation Forests Over the Last Three Millennia in Yellowstone National Park written by M. Allison Stegner and published by . This book was released on 2019 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conifer forests of the western US are historically well adapted to wildfires, but current warming is creating novel disturbance regimes that may fundamentally change future forest dynamics. Stand-replacing fires can catalyze forest reorganization by providing periodic opportunities for establishment of new tree cohorts that set the stage for stand development for centuries to come. Extensive research on modern and past fires in the Northern Rockies reveals how variations in climate and fire have led to large changes in forest distribution and composition. Unclear, however, is the importance of individual fire episodes in catalyzing change. We used high-resolution paleoecologic and paleoclimatic data from Crevice Lake (Yellowstone National Park, Wyoming, USA), to explore the role of fire in driving low-elevation forest dynamics over the last 2820 yr. We addressed two questions: 1) did low-elevation forests at Crevice Lake experience abrupt community-level vegetation changes in response to past fire events? 2) Did the interaction of short-term disturbance events (fire) and long-term climate change catalyze past shifts in forest composition? Over the last 2820 yr, we found no evidence for abrupt community-level vegetation transitions at Crevice Lake, and no evidence that an interaction of climate and fire produced changes in the relative abundance of dominant plant taxa. In part, this result reflects limitations of the datasets to detect past event-specific responses and their causes. Nonetheless, the relative stability of the vegetation to fires over the last 2820 yr provides a local baseline for assessing current and future ecological change. Observations of climate?fire?vegetation dynamics in recent decades suggest that this multi-millennial-scale baseline may soon be exceeded.

Plants and Their Environments

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ISBN 13 :
Total Pages : 372 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Plants and Their Environments by :

Download or read book Plants and Their Environments written by and published by . This book was released on 1994 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Environmental Profile of the Greater Yellowstone Ecosystem

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ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis An Environmental Profile of the Greater Yellowstone Ecosystem by : Dennis Glick

Download or read book An Environmental Profile of the Greater Yellowstone Ecosystem written by Dennis Glick and published by . This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

After the Fires

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Publisher : Yale University Press
ISBN 13 : 0300127758
Total Pages : 400 pages
Book Rating : 4.3/5 (1 download)

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Book Synopsis After the Fires by : Linda L. Wallace

Download or read book After the Fires written by Linda L. Wallace and published by Yale University Press. This book was released on 2004-01-01 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Americans currently choose their president through the electoral college, an extraordinarily complex mechanism that may elect a candidate who does not receive the most votes. In this provocative book, George Edwards III argues that, contrary to what supporters of the electoral college claim, there is no real justification for a system that might violate majority rule. Drawing on systematic data, Edwards finds that the electoral college does not protect the interests of small states or racial minorities, does not provide presidents with effective coalitions for governing, and does little to protect the American polity from the alleged harms of direct election of the president. In fact, the electoral college distorts the presidential campaign so that candidates ignore most small states and some large ones and pay little attention to minorities, and it encourages third parties to run presidential candidates and discourages party competition in many states. Edwards demonstrates effectively that direct election of the president without a runoff maximizes political equality and eliminates the distortions in the political system caused by the electoral college.

Yellowstone's Wildlife in Transition

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Publisher : Harvard University Press
ISBN 13 : 0674076419
Total Pages : 362 pages
Book Rating : 4.6/5 (74 download)

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Book Synopsis Yellowstone's Wildlife in Transition by : P. J. White

Download or read book Yellowstone's Wildlife in Transition written by P. J. White and published by Harvard University Press. This book was released on 2013-04-01 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world's first national park is constantly changing. How we understand and respond to recent events putting species under stress will determine the future of ecosystems millions of years in the making. Marshaling expertise from over 30 contributors, Yellowstone's Wildlife in Transition examines three primary challenges to the park's ecology.

Yellowstone's Northern Range

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ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Yellowstone's Northern Range by :

Download or read book Yellowstone's Northern Range written by and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Greater Yellowstone Public Lands

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ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Greater Yellowstone Public Lands by : Alice Wondrak Biel

Download or read book Greater Yellowstone Public Lands written by Alice Wondrak Biel and published by . This book was released on 2006 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Ecology of Large Mammals in Central Yellowstone

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Publisher : Academic Press
ISBN 13 : 0080921051
Total Pages : 712 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis The Ecology of Large Mammals in Central Yellowstone by : Robert A. Garrott

Download or read book The Ecology of Large Mammals in Central Yellowstone written by Robert A. Garrott and published by Academic Press. This book was released on 2008-11-25 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an authoritative work on the ecology of some of America’s most iconic large mammals in a natural environment - and of the interplay between climate, landscape, and animals in the interior of the world’s first and most famous national park.Central Yellowstone includes the range of one of the largest migratory populations of bison in North America as well as a unique elk herd that remains in the park year round. These populations live in a varied landscape with seasonal and often extreme patterns of climate and food abundance. The reintroduction of wolves into the park a decade ago resulted in scientific and public controversy about the effect of large predators on their prey, a debate closely examined in the book. Introductory chapters describe the geography, geology and vegetation of the ecosystem. The elk and bison are then introduced and their population ecology described both pre- and post– wolf introduction, enabling valuable insights into the demographic and behavioral consequences for their ungulate prey. Subsequent chapters describe the wildlife-human interactions and show how scientific research can inform the debate and policy issues surrounding winter recreation in Yellowstone. The book closes with a discussion of how this ecological knowledge can be used to educate the public, both about Yellowstone itself and about science, ecology and the environment in general. Yellowstone National Park exemplifies some of the currently most hotly debated and high-profile ecological, wildlife management, and environmental policy issues and this book will have broad appeal not only to academic ecologists, but also to natural resource students, managers, biologists, policy makers, administrators and the general public. Unrivalled descriptions of ecological processes in a world famous ecosystem, based on information from 16 years of painstaking field work and collaborations among 66 scientists and technical experts and 15 graduate studies Detailed studies of two charismatic North American herbivore species – elk and bison Description of the restoration of wolves into central Yellowstone and their ecological interactions with their elk and bison prey Illustrated with numerous evocative colour photographs and stunning maps

The Yellowstone Primer

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Publisher :
ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis The Yellowstone Primer by : John Baden

Download or read book The Yellowstone Primer written by John Baden and published by . This book was released on 1990 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Vegetation Dynamics in Yellowstone's Northern Range

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ISBN 13 :
Total Pages : 278 pages
Book Rating : 4.:/5 (632 download)

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Book Synopsis Vegetation Dynamics in Yellowstone's Northern Range by : Shannon Lea Savage

Download or read book Vegetation Dynamics in Yellowstone's Northern Range written by Shannon Lea Savage and published by . This book was released on 2005 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Yellowstone's Destabilized Ecosystem

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Publisher : Oxford University Press
ISBN 13 : 0198033796
Total Pages : 386 pages
Book Rating : 4.1/5 (98 download)

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Book Synopsis Yellowstone's Destabilized Ecosystem by : Frederic H. Wagner

Download or read book Yellowstone's Destabilized Ecosystem written by Frederic H. Wagner and published by Oxford University Press. This book was released on 2006-05-25 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wagner, one of our most distinguished wildlife biologists, is a strong critic of ecological practices in the national parks. This book provides an assessment of the ecological history of Yellowstone's northern range, since before the park existed, showing the impact of US Park Service policies on the health of the areas they oversee. He demonstrates that elk had been historically rare throughout the region and that overgrazing by elk has seriously degraded the landscape and altered the structure of the area. This is a major contribution to reconstructing the ecology of this region over the course of the past 500 years. It is also a critique of US Park Service management policies and their stewardship of the nation's most cherished natural areas. Wagner's book will generate substantial attention and debate both in the scientific and policy/management communities.

Vision for the Future

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ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Vision for the Future by :

Download or read book Vision for the Future written by and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: