Download or read book Watershed Boundaries and Geographic Isolation written by Janet L. Loxterman and published by . This book was released on 2012 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background For wide-ranging species, intraspecific variation can occur as a result of reproductive isolation from local adaptive differences or from physical barriers to movement. Cutthroat trout (Oncorhynchus clarkii), a widely distributed fish species from North America, has been divided into numerous putative subspecies largely based on its isolation in different watersheds. In this study, we examined mtDNA sequence variation of cutthroat trout to determine the major phylogenetic lineages of this polytypic species. We use these data as a means of testing whether geographic isolation by watershed boundaries can be a primary factor organizing intraspecific diversification. Results We collected cutthroat trout from locations spanning almost the entire geographic range of this species and included samples from all major subspecies of cutthroat trout. Based on our analyses, we reveal eight major lineages of cutthroat trout, six of which correspond to subspecific taxonomy commonly used to describe intraspecific variation in this species. The Bonneville cutthroat trout (O. c. utah) and Yellowstone cutthroat trout (O. c. bouvieri) did not form separate monophyletic lineages, but instead formed an intermixed clade. We also document the geographic distribution of a Great Basin lineage of cutthroat trout; a group typically defined as Bonneville cutthroat trout, but it appears more closely related to the Colorado River lineage of cutthroat trout. Conclusion Our study indicates that watershed boundaries can be an organizing factor isolating genetic diversity in fishes; however, historical connections between watersheds can also influence the template of isolation. Widely distributed species, like cutthroat trout, offer an opportunity to assess where historic watershed connections may have existed, and help explain the current distribution of biological diversity across a landscape.
Download or read book New Strategies for America s Watersheds written by National Research Council and published by National Academies Press. This book was released on 1999-04-28 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emergence of a toxic organism like pfisteria in tributaries of the Chesapeake Bay has focused public attention on potential hazards in our water. More importantly, it has reminded us of the importance of the entire watershed to the health of any body of water and how political boundaries complicate watershed management. New Strategies for America's Watersheds provides a timely and comprehensive look at the rise of "watershed thinking" among scientists and policymakers and recommends ways to steer the nation toward improved watershed management. The volume defines important terms, identifies fundamental issues, and explores reasons why now is the time to bring watersheds to the forefront of ecosystem management. In a discussion of scale and scope, the committee examines how to expand the watershed from a topographic unit to a framework for integrating natural, social, and economic perspectives as they share the same geographic space. The volume discusses: Regional variations in climate, topography, demographics, institutions, land use, culture, and law. Roles and interaction of federal, state, and local agencies. Availability or lack of pertinent data. Options for financing. The committee identifies critical points in watershed planning to ensure appropriate stakeholder involvement and integration of science, policy, and environmental ethics.
Download or read book Animal Movement Across Scales written by Lars-Anders Hansson and published by . This book was released on 2014 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Movement, dispersal, and migration on land, in the air, and in water, are pervading features of animal life. They are performed by a huge variety of organisms, from the smallest protozoans to the largest whales, and can extend over widely different distance scales, from the microscopic to global. Integrating the study of movement, dispersal, and migration is crucial for a detailed understanding of the spatial scale of adaptation, and for analysing the consequences of landscape and climate change as well as of invasive species. This novel book adopts a broad, cross-taxonomic approach to animal movement across both temporal and spatial scales, addressing how and why animals move, and in what ways they differ in their locomotion and navigation performance. Written by an integrated team of leading researchers, the book synthesizes our current knowledge of the genetics of movement, including gene flow and local adaptations, whilst providing a future perspective on how patterns of animal migration may change over time together with their potential evolutionary consequences. Novel technologies for tracking the movement of organisms across scales are also discussed, ranging from satellite devices for tracking global migrations to nanotechnology that can follow animals only a millimetre in size. Animal Movement Across Scales is particularly suitable for graduate level students taking courses in spatial animal ecology, animal migration, and 'movement ecology', as well as providing a source of fresh ideas and opinions for those already active within the field. It will also be of interest and use to a broader audience of professional biologists interested in animal movements and migrations.
Download or read book Landscape Genetics written by Niko Balkenhol and published by John Wiley & Sons. This book was released on 2015-08-26 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the substantial interest in landscape genetics from the scientific community, learning about the concepts and methods underlying the field remains very challenging. The reason for this is the highly interdisciplinary nature of the field, which combines population genetics, landscape ecology, and spatial statistics. These fields have traditionally been treated separately in classes and textbooks, and very few scientists have received the interdisciplinary training necessary to efficiently teach or apply the diversity of techniques encompassed by landscape genetics. To address the current knowledge gap, this book provides the first in depth treatment of landscape genetics in a single volume. Specifically, this book delivers fundamental concepts and methods underlying the field, covering particularly important analytical methods in detail, and presenting empirical and theoretical applications of landscape genetics for a variety of environments and species. Consistent with the interdisciplinary nature of landscape genetics, the book combines an introductory, textbook like section with additional sections on advanced topics and applications that are more typical of edited volumes. The chapter topics and the expertise of the authors and the editorial team make the book a standard reference for anyone interested in landscape genetics. The book includes contributions from many of the leading researchers in landscape genetics. The group of scientists we have assembled has worked on several collaborative projects over the last years, including a large number of peer reviewed papers, several landscape genetics workshops at international conferences, and a distributed graduate seminar on landscape genetics. Based on the experiences gained during these collaborative teaching and research activities, the book includes chapters that synthesize fundamental concepts and methods underlying landscape genetics (Part 1), chapters on advanced topics that deserve a more in depth treatment (Part 2), and chapters illustrating the use of concepts and methods in empirical applications (Part 3). This structure ensures a high usefulness of the book for beginning landscape geneticists and experienced researchers alike, so that it has a broad target audience. At least one of the four co editors is involved in almost every chapter of the book, thereby ensuring a high consistency and coherency among chapters.
Download or read book Watershed Boundaries and Relationship Between Stream Order and Watershed Morphology at Fort Benning Georgia written by and published by . This book was released on 2001 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the procedures followed to develop a detailed watershed database for Fort Benning, Georgia, and the surrounding area. In addition, the relationship between watershed morphology and stream order was examined. Watershed order and a number of variables describing surface topography and the network were computed and statistical analysis procedures were used to develop a predictive relationship. Watershed boundaries were computed from a digital elevation model and assigned an order using the Strahler stream-ordering technique. This procedure is rather tedious and requires that all the drainage network upstream of the area of interest be digitized. A number of physical parameters defining these watersheds were computed using a geographic information system (GIS) and the relationship of these parameters to stream order was examined. The purpose of this analysis was to determine if stream order could be predicted reliably using a number of computed physical parameters. Regression analysis showed that stream order had a highly significant relationship (r-square = 0.77) with two easily computed variables: total relief; and average slope. A procedure for estimating stream order, within an acceptable degree of error, could be beneficial for many applications, such as assisting in the parameterization of hydrologic models.
Download or read book The New Hampshire Watershed Tool A Geographic Information System Tool to Estimate Streamflow Statistics and Ground Water Recharge Rates written by and published by DIANE Publishing. This book was released on with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standing between Life and Extinction written by David L. Propst and published by University of Chicago Press. This book was released on 2021-02-15 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: North American deserts—lands of little water—have long been home to a surprising diversity of aquatic life, from fish to insects and mollusks. With European settlement, however, water extraction, resource exploitation, and invasive species set many of these native aquatic species on downward spirals. In this book, conservationists dedicated to these creatures document the history of their work, the techniques and philosophies that inform it, and the challenges and opportunities of the future. A precursor to this book, Battle Against Extinction, laid out the scope of the problem and related conservation activities through the late 1980s. Since then, many nascent conservation programs have matured, and researchers have developed new technologies, improved and refined methods, and greatly expanded our knowledge of the myriad influences on the ecology and dynamics of these species. Standing between Life and Extinction brings the story up to date. While the future for some species is more secure than thirty years ago, others are less fortunate. Calling attention not only to iconic species like the razorback sucker, Gila trout, and Devils Hole pupfish, but also to other fishes and obscure and fascinating invertebrates inhabiting intermittent aquatic habitats, this book explores the scientific, social, and political challenges of preserving these aquatic species and their habitats amid an increasingly charged political discourse and in desert regions characterized by a growing human population and rapidly changing climate.
Download or read book watershed management written by MR.PAWAR RAJENDRA ANNA and published by Blue Rose Publishers. This book was released on 2022-10-25 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is related to MA / M sci geography. The subject is in the context of watershed management. The subject is according to semester pattern.The syllabus of this subject is according to Savitribai Phule Pune University academic year 2020 pattern
Download or read book A Fine Spotted Trout on Corral Creek written by Matthew Dickerson and published by Wings Press. This book was released on 2021-09-01 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Matthew Dickerson's well-crafted prose narrative takes readers from the headwaters of the Colorado River in Wyoming to the Crown of the Continent in Glacier National Park. In the midst of the lovingly described wild and scenic beauty of these places, readers will learn about the science, history, conservation, and restoration of an important native fish—cutthroat trout—and the habitats where they live, while enjoying stories of the pursuit of those fish with both a fly rod and a camera. The book is well-informed by science as well as careful observation, and conveys both the passion and knowledge of the author. The author, Matthew Dickerson, was a 2017 artist-in-residence at Glacier National Park, invited to that residence specifically to learn and write about cutthroat trout. Much of what he learned and observed is shared in this book, along with stories and knowledge gleaned from times in the national forests of Wyoming and interviews with USGS, U.S.Forest Service, and National Park Service biologists. It is well-informed by science, but doesn't read like a scientific text.
Download or read book Ecological Meltdown written by Asheem Srivastav and published by The Energy and Resources Institute (TERI). This book was released on 2015-05-07 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the second edition of Ecological Meltdown: impact of unchecked human growth on the earths natural systems, the authors discuss the destruction of biodiversity and ecosystems due to human actions. Apart from warning about the impending ecological meltdown and analysing the causes behind it, the book deals with the solutions that need to be urgently adopted by the global civil society and national governments. The book is an invaluable resource for policymakers and institutions in the forestry, wildlife, energy, rural development, and environment sectors. It will also prove beneficial for conservationists, scientists, researchers, and students of environmental science. A new chapter on Time for energy transition has been added in this edition.
Download or read book Federal Standards and Procedures for the National Watershed Boundary Dataset Wbd written by U.s. Department of Agriculture and published by CreateSpace. This book was released on 2014-06-24 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Watershed Boundary Dataset (WBD) is a compre- hensive aggregated collection of hydrologic unit data consis- tent with the national criteria for delineation and resolution. This document establishes Federal standards and procedures for creating the WBD as seamless and hierarchical hydrologic unit data, based on topographic and hydrologic features at a 1:24,000 scale in the United States, except for Alaska at 1:63,360 scale, and 1:25,000 scale in the Caribbean. The data within the WBD have been reviewed for certification through the 12-digit hydrologic unit for compliance with the criteria outlined in this document. Any edits to certified data will be reviewed against this standard prior to inclusion. Although not required as part of the framework WBD, the guidelines contain details for compiling and delineating the boundar- ies of two additional levels, the 14- and 16-digit hydrologic units, as well as the use of higher resolution base information to improve delineations. The guidelines presented herein are designed to enable local, regional, and national partners to delineate hydrologic units consistently and accurately. Such consistency improves watershed management through efficient sharing of information and resources and by ensuring that digital geographic data are usable with other related Geo- graphic Information System (GIS) data.
Download or read book Identifying Waters Protected by the Clean Water Act CWA written by Barry Leonard and published by DIANE Publishing. This book was released on 2011-08 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, interpretations of Supreme Court (SC) rulings removed some critical waters from Fed. protection, and caused confusion about which waters and wetlands are protected under the CWA. As a result, important waters now lack clear protection under the law. This draft guidance clarifies how the EPA and the U.S. Army Corps of Engineers (ACE) will identify waters protected by the CWA and implement the SC¿s decisions concerning the extent of waters covered by the Act. It clarifies how the EPA and the ACE understand existing requirements of the CWA and provides guidance to agency field staff in making determinations about whether waters are protected by the CWA. This is a print on demand report.
Download or read book The Structure of Political Geography written by Julian Minghi and published by Routledge. This book was released on 2017-09-04 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume seeks to provide a sense of purpose and order to the study of political geography. The editors devise a conceptual structure for the field, bringing political geography into line with trends in contemporary geography as a whole and with other social sciences. Not only do the selections contain a wide variety of contributions from other fields, but the introductory essays and annotated bibliographies suggest related research. The structure of the book enjoys close parallels in other social sciences.The organization of the book reflects the editors' definitions and structuring of political geography. Part I, ""Heritage,"" includes works that have contributed to the theoretical development of the field. Part II, ""Structure,"" comprises the concern to which political geographers have devoted most of their past attention. Parts III and IV, ""Process"" and ""Behavior,"" form the subject where much future theoretical and practical effort is needed. Part V, ""Environment,"" provides the context in which spatial structure, process, and behavior occur.The Structure of Political Geography includes selections from sociobiology, history, international relations, political economy, political science, social psychology, and sociology. The classics in the field are an essential inclusion since the book would be incomplete without them. The selections in the volume, originally published in 1971, remain useful and pertinent to political geographers of diverse persuasion and to social scientists interested in geographical approaches. The fact that there is a clear focus and conceptual interdependence in political geography is the volume's greatest contribution.
Download or read book Performativity Politics and the Production of Social Space written by Michael R. Glass and published by Routledge. This book was released on 2014-01-10 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theories of performativity have garnered considerable attention within the social sciences and humanities over the past two decades. At the same time, there has also been a growing recognition that the social production of space is fundamental to assertions of political authority and the practices of everyday life. However, comparatively little scholarship has explored the full implications that arise from the confluence of these two streams of social and political thought. This is the first book-length, edited collection devoted explicitly to showcasing geographical scholarship on the spatial politics of performativity. It offers a timely intervention within the field of critical human geography by exploring the performativity of political spaces and the spatiality of performative politics. Through a series of geographical case studies, the contributors to this volume consider the ways in which a performative conception of the "political" might reshape our understanding of sovereignty, political subjectification, and the production of social space. Marking the 20th anniversary of the publication of Judith Butler’s classic, Bodies That Matter (1993), this edited volume brings together a range of contemporary geographical works that draw exciting new connections between performativity, space, and politics.
Download or read book A Systems Approach to Modeling the Water Energy Land Food Nexus Volume I written by Bernard Amadei and published by Momentum Press. This book was released on 2019-01-29 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set describes a flexible and adaptive system-based methodology and associated guidelines for the management and allocation of community-based WELF resources. Over the next 50 years, rapid population, urbanization, and economic growth worldwide will create unprecedented demands for water, energy, land, and food (WELF) resources. The discussion on how to meet human needs for WELF resources and how to guarantee their respective securities has changed over time from looking at all four sectors in isolation to understanding their interdependency through the so-called WELF nexus. The approach presented in this book responds to the overall agreement in the WELF nexus literature that the management and allocation of WELF resources at the community level need to be examined in a more systemic, multidisciplinary, participatory, and practical manner while seeking to increase synergies and reduce trade-offs. This book was written to explore the value proposition of that approach. Volume 1 focuses on defining the landscape in which the nexus operates and outlines the proposed methodology. Volume 2 explores the quantitative and qualitative modeling of the nexus and landscape using system modeling tools including system dynamics. It presents a road map for the formulation, simulation, selection, and ranking of possible intervention plans. The proposed methodology is designed to serve as a guide for different groups involved in the science and policy decision aspects of the WELF nexus within the context of community development. The methodology focuses mostly on WELF-related issues in small-scale and low-income communities where securing resources is critical to their short- and long-term livelihood and development.
Download or read book Field Guide to the Fishes of the Amazon Orinoco and Guianas written by Peter van der Sleen and published by Princeton University Press. This book was released on 2017-12-11 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Amazon and Orinoco basins in northern South America are home to the highest concentration of freshwater fish species on earth, with more than 3,000 species allotted to 564 genera. Amazonian fishes include piranhas, electric eels, freshwater stingrays, a myriad of beautiful small-bodied tetras and catfishes, and the largest scaled freshwater fish in the world, the pirarucu. Field Guide to the Fishes of the Amazon, Orinoco, and Guianas provides descriptions and identification keys for all the known genera of fishes that inhabit Greater Amazonia, a vast and still mostly remote region of tropical rainforests, seasonally flooded savannas, and meandering lowland rivers. The guide’s contributors include more than fifty expert scientists. They summarize the current state of knowledge on the taxonomy, species richness, and ecology of these fish groups, and provide references to relevant literature for species-level identifications. This richly illustrated guide contains 700 detailed drawings, 190 color photos, and 500 distribution maps, which cover all genera. An extensive and illustrated glossary helps readers with the identification keys. The first complete overview of the fish diversity in the Amazon, Orinoco, and Guianas, this comprehensive guide is essential for anyone interested in the freshwater life inhabiting this part of the world. First complete overview of the fish diversity in the Amazon and Orinoco basins Contributors include more than fifty experts Identification keys and distribution maps for all genera 190 stunning color photos 700 detailed line drawings Extensive and illustrated glossary
Download or read book Historical Biogeography of Neotropical Freshwater Fishes written by James S. Albert and published by Univ of California Press. This book was released on 2011-03-08 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fish faunas of continental South and Central America constitute one of the greatest concentrations of aquatic diversity on Earth, consisting of about 10 percent of all living vertebrate species. Historical Biogeography of Neotropical Freshwater Fishes explores the evolutionary origins of this unique ecosystem. The chapters address central themes in the study of tropical biodiversity: why is the Amazon basin home to so many distinct evolutionary lineages? What roles do ecological specialization, speciation, and extinction play in the formation of regional assemblages? How do dispersal barriers contribute to isolation and diversification? Focusing on whole faunas rather than individual taxonomic groups, this volume shows that the area’s high regional diversity is not the result of recent diversification in lowland tropical rainforests. Rather, it is the product of species accumulating over tens of millions of years and across a continental arena.
