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Author : Bruce D. J. Batt
Publisher : Unknown
Page : 130 pages
File Size : 52,6 Mb
Release : 1997
Category : Nature
ISBN : CORNELL:31924101519258
Author : United States. Congress. House. Committee on Resources
Publisher : Unknown
Page : 10 pages
File Size : 46,6 Mb
Release : 1999
Category : Birds
ISBN : PURD:32754069250987
Author : United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans
Publisher : Unknown
Page : 64 pages
File Size : 40,7 Mb
Release : 1998
Category : Nature
ISBN : PSU:000033090627
Author : Anonim
Publisher : Unknown
Page : 828 pages
File Size : 45,9 Mb
Release : 1998-11-05
Category : Administrative law
ISBN : UIUC:30112059140944
Author : James R. Ehleringer,Thure Cerling,M. Denise Dearing
Publisher : Springer Science & Business Media
Page : 545 pages
File Size : 52,7 Mb
Release : 2005-07-28
Category : Science
ISBN : 9780387270487
Based in extensive research in geology, atmospheric science, and paleontology, this book offers a detailed history of CO2 in the atmosphere, and an understanding of factors that have influenced changes in the past. The text illuminates the role of atmospheric CO2 in the modern carbon cycle and in the evolution of plants and animals, and addresses the future role of atmospheric CO2 and its likely effects on ecosystems.
Author : Anonim
Publisher : Unknown
Page : 262 pages
File Size : 43,8 Mb
Release : 2007
Category : Electronic
ISBN : NWU:35556036644029
Author : Jacqueline A. Richter-Menge
Publisher : DIANE Publishing
Page : 103 pages
File Size : 40,7 Mb
Release : 2011-08
Category : Technology & Engineering
ISBN : 9781437984965
Tracks recent environ. changes throughout the Arctic. In 2010, it is clear that the Arctic is experiencing the impacts of a prolonged and amplified warming trend, highlighted with many record-setting events. The impact of this warming is most evident in the dramatic losses that have been observed in the ice covers that define the region. Since the loss of these ice covers serves to further feed the warming trend, the expectation is that warming will continue. This makes it increasingly unlikely that the Arctic will return to conditions that were considered normal in the later part of the 20th cent. Instead, it is very likely that Arctic climate warming will continue and records will continue to be set in years to come. Charts and tables. This is a print on demand report.
Author : Leah Bendell-Young,Patricia Gallaugher
Publisher : Springer Science & Business Media
Page : 248 pages
File Size : 42,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461514930
Who Speaks for the Oceans? The question has been asked a lot in recent years - just who is looking out for our oceans? Covering over seventy percent of the earth's surface it is the world's largest common property resource,jojntly owned by over six billion humans. It is the foundation for life on earth as we know it. Over the years, many people have spoken about various aspects of our ocean environments and they have spoken to different audiences in many different ways. For many in the public realm, Jacques Cousteau spoke for the ocean. Since his passing, no single voice with the sallle public identity or recognition has emerged. Certainly the many governments bordering our oceans cannot agree on common principles or issues of ocean use and management. We might be tempted think that we do not have an ocean spokesperson or champion, but we would be wrong. Today, the rapidly growing number of scientists working hard to expand our under standing of our ocean realm are the ocean voices we should listen to. At the same time as our scientists advance their understanding of the oceans, we all need to advance our abilities and commitment to communicate on behalf of the oceans with broader and broader audiences who need to be aware of where things stand. Often called "the last great frontier", earth's oceans are vast, widely varied, and are hard to get to, arid into, to do the research we need done.
Author : Steven R. Beissinger,Dale R. McCullough
Publisher : University of Chicago Press
Page : 594 pages
File Size : 41,7 Mb
Release : 2002-05-04
Category : Nature
ISBN : 9780226041780
Many of the world's leading conservation and population biologists evaluate what has become a key tool in estimating extinction risk and evaluating potential recovery strategies - population viability analysis, or PVA.
Author : Jonathan Robert Bart,Victoria Helen Johnston
Publisher : Univ of California Press
Page : 320 pages
File Size : 45,5 Mb
Release : 2012-08-02
Category : Science
ISBN : 9780520273108
"/i/Arctic Shorebirds in North America//i/ represents a study that is one of the remarkable achievements of wildlife fieldcraft, like those done by Aldo Leopold in the 1930s and by the Craighead Brothers in the 1960s. To conduct a study of this scientific caliber in the great expanse and harsh climate of the Arctic makes it one of the great wildlife investigations whose value will only grow with time."--Larry Niles, Conserve Wildlife Foundation of New Jersey "It is most timely that Jonathan Bart and Victoria Johnston have gathered information on shorebirds that breed in the Arctic regions of North America. Data on these birds is generated at a wide range of locations by many different individuals and teams, and this book puts it into perspective. It is particularly valuable to have this treatise when so many shorebird species worldwide are in marked decline."--Clive Minton, Australasian Wader Studies Group "When the PRISM program for pan-Arctic shorebird monitoring was introduced, everyone agreed with its laudable aims, but it seemed impractical. How could shorebird biologists with limited time and resources acquire robust data on the size and trend of shorebird populations across the American Arctic? Now, the credibility gap has been bridged. /i/Arctic Shorebirds in North America//i/ presents the rigorous, practical methods that will be the foundation of Arctic shorebird monitoring for years to come. I look forward to Arctic PRISM becoming the keystone of shorebird conservation in the Western Hemisphere."--Humphrey Sitters, editor of /i/Wader Study Group Bulletin//i/
Author : Richard J. Hobbs,Katharine N. Suding,Peter Society for Ecological Restoration International
Publisher : Island Press
Page : 366 pages
File Size : 46,7 Mb
Release : 2013-03-19
Category : Science
ISBN : 9781610911382
As scientific understanding about ecological processes has grown, the idea that ecosystem dynamics are complex, nonlinear, and often unpredictable has gained prominence. Of particular importance is the idea that rather than following an inevitable progression toward an ultimate endpoint, some ecosystems may occur in a number of states depending on past and present ecological conditions. The emerging idea of “restoration thresholds” also enables scientists to recognize when ecological systems are likely to recover on their own and when active restoration efforts are needed. Conceptual models based on alternative stable states and restoration thresholds can help inform restoration efforts. New Models for Ecosystem Dynamics and Restoration brings together leading experts from around the world to explore how conceptual models of ecosystem dynamics can be applied to the recovery of degraded systems and how recent advances in our understanding of ecosystem and landscape dynamics can be translated into conceptual and practical frameworks for restoration. In the first part of the book, background chapters present and discuss the basic concepts and models and explore the implications of new scientific research on restoration practice. The second part considers the dynamics and restoration of different ecosystems, ranging from arid lands to grasslands, woodlands, and savannahs, to forests and wetlands, to production landscapes. A summary chapter by the editors discusses the implications of theory and practice of the ideas described in preceding chapters. New Models for Ecosystem Dynamics and Restoration aims to widen the scope and increase the application of threshold models by critiquing their application in a wide range of ecosystem types. It will also help scientists and restorationists correctly diagnose ecosystem damage, identify restoration thresholds, and develop corrective methodologies that can overcome such thresholds.
Author : Anonim
Publisher : Unknown
Page : 176 pages
File Size : 47,9 Mb
Release : 1999
Category : Agricultural extension work
ISBN : UCD:31175025347835
Author : G. C. Boere,Colin A. Galbraith,David A. Stroud
Publisher : The Stationery Office
Page : 836 pages
File Size : 53,5 Mb
Release : 2006
Category : Flyways
ISBN : 9780114973339
This book is the outcome of a major international conference on waterbirds held in Edinburgh in April 2004.
Author : James J. Dinsmore,Stephen J. Dinsmore
Publisher : University of Iowa Press
Page : 295 pages
File Size : 53,8 Mb
Release : 2023
Category : Nature
ISBN : 9781609389253
"This book tells the recent story of Iowa's wildlife from recovery and restoration to disappointing declines. During the pandemic, the number of visitors to state parks, wildlife areas, and other natural areas has increased greatly. For many, this is a new experience. This book will provide them with a reliable source of information about many of the animals that they are now seeing. Much has changed with Iowa's wildlife in the past 30 years. Some species like Canada goose, wild turkey, and white-tailed deer that once were rare in Iowa are now common, and others like sandhill crane, river otter, and trumpeter swan are becoming increasingly abundant. The goal of this book is to provide an up-to-date, scientifically based summary of changes in the distribution, status, conservation needs, and future prospects of about 60 species of Iowa's birds and mammals whose populations have increased or decreased in the past 30 years. Emphasis is given to several species that have experienced significant growth, some that show signs that they may experience future growth, and a few whose long-term future in Iowa is in jeopardy. This book is not an update of James and Stephen Dinsmore's earlier book, A Country So Full of Game, which discussed Iowa's wildlife up to about 1990. This is an entirely new book, discussing what has happened in the years 1990-2020. For species covered in the earlier book, only a brief discussion of earlier years is provided to connect the new material to what happened earlier"--
Author : Anonim
Publisher : UNEP/Earthprint
Page : 40 pages
File Size : 45,7 Mb
Release : 2006
Category : Medical
ISBN : 8277010389
Planet in peril offers an analysis of today's global issues and their impact on human population and the environment. This Atlas illustrates, through text and maps, graphics and diagrams the interplay between population and the world's ecosystems and natural resources both in the short and long terms. It brings together a wealth of information from the most up-to-date sources on such key issues as climate change, access to water, exploitation of ocean resources, nuclear energy and waste, renewable energy, weapons of mass destruction, causes of industrial accidents, waste, export, hunger, genetically modified organisms, urban development, access to health care and ecological change in China.