Avian Migration

Avian Migration
Author: Peter Berthold
Publisher: Springer Science & Business Media
Total Pages: 601
Release: 2013-03-09
Genre: Science
ISBN: 3662059576

P. Berthold and E. Gwinnd Bird migration is an intriguing aspect of the living world - so much so that it has been investigated for as long, and as thoroughly, as almost any other natural phenomenon. Aristotle, who can count as the founder of scientific ornithology, paid very close attention to the migrations of the birds he ob served, but it was not until the reign of Friedrich II, in the first half of the 13th century, that reliable data began to be obtained. From then on, the data base grew rapidly. Systematic studies of bird migration were introduced when the Vogelwarte Rossitten was founded, as the first ornithological biological observation station in the world (see first chapter "In Memory of Vogelwarte Rossitten"). This area later received enormous impetus when ex perimental research on the subject was begun: the large-scale bird-ringing experiment initiated in Rossitten in 1903 by Johannes Thienemann (who was inspired by the pioneering studies of C. C. M. Mortensen), the experiments on photoperiodicity carried out by William Rowan in the 1920s in Canada and retention and release experiments performed by Thienemann in the 1930s in Rossitten, the first experimental study on the orientation of migratory birds. After the Second World War, migration research, while continuing in the previous areas, also expanded into new directions such as radar ornithology, ecophysiology and hormonal control mechanisms, studies of evolution, ge netics, telemetry and others.

Black Identities

Black Identities
Author: Mary C. WATERS
Publisher: Harvard University Press
Total Pages: 431
Release: 2009-06-30
Genre: Social Science
ISBN: 9780674044944

The story of West Indian immigrants to the United States is generally considered to be a great success. Mary Waters, however, tells a very different story. She finds that the values that gain first-generation immigrants initial success--a willingness to work hard, a lack of attention to racism, a desire for education, an incentive to save--are undermined by the realities of life and race relations in the United States. Contrary to long-held beliefs, Waters finds, those who resist Americanization are most likely to succeed economically, especially in the second generation.

Indigenous Routes

Indigenous Routes
Author: Carlos Yescas Angeles Trujano
Publisher: Hammersmith Press
Total Pages: 88
Release: 2008
Genre: Developing countries
ISBN: 9290684410

As migration has not commonly been considered as part of the indigenous experience, the prevalent view of indigenous communities tends to portray them as static groups, deeply rooted in their territories and customs. Increasingly, however, indigenous peoples are leaving their long-held territories as part of the phenomenon of global migration beyond the customary seasonal and cultural movements of particular groups. Diverse examples of indigenous peoples' migration, its distinctive features and commonalities are highlighted throughout this report, and show that more research and data on this topic are necessary to better inform policies on migration and other phenomena that have an impact on indigenous people' lives.

South-south Migration and Remittances

South-south Migration and Remittances
Author: Dilip Ratha
Publisher: World Bank Publications
Total Pages: 70
Release: 2007
Genre: Social Science
ISBN: 0821370731

"South-South Migration and Remittances" reports on preliminary results from an ongoing effort to improve data on bilateral migration stocks. It sets out some working hypotheses on the determinants and socioeconomic implications of South-South migration. Contrary to popular perception that migration is mostly a South-North phenomenon, South-South migration is large. Available data from national censuses suggest that nearly half of the migrants from developing countries reside in other developing countries. Almost 80 percent of South-South migration takes place between countries with contiguous borders. Estimates of South-South remittances range from 9 to 30 percent of developing countries' remittance receipts in 2005. Although the impact of South-South migration on the income of migrants and natives is smaller than for South-North migration, small increases in income can have substantial welfare implications for the poor. The costs of South-South remittances are even higher than those of North-South remittances. These findings suggest that policymakers should pay attention to the complex challenges that developing countries face not only as countries of origin, but also as countries of destination.

Ecological Regions of North America

Ecological Regions of North America
Author:
Publisher:
Total Pages: 92
Release: 1997
Genre: Biogeography
ISBN:

This volume represents a first attempt at holistically classifying and mapping ecological regions across all three countries of the North American continent. A common analytical methodology is used to examine North American ecology at multiple scales, from large continental ecosystems to subdivisions of these that correlate more detailed physical and biological settings with human activities on two levels of successively smaller units. The volume begins with an overview of North America from an ecological perspective, concepts of ecological regionalization. This is followed by descriptions of the 15 broad ecological regions, including information on physical and biological setting and human activities. The final section presents case studies in applications of the ecological characterization methodology to environmental issues. The appendix includes a list of common and scientific names of selected species characteristic of the ecological regions.

Neotropical Diversification: Patterns and Processes

Neotropical Diversification: Patterns and Processes
Author: Valentí Rull
Publisher: Springer Nature
Total Pages: 816
Release: 2020-03-30
Genre: Science
ISBN: 3030311678

This book provides a comprehensive overview of the patterns of biodiversity in various neotropical ecosystems, as well as a discussion on their historical biogeographies and underlying diversification processes. All chapters were written by prominent researchers in the fields of tropical biology, molecular ecology, climatology, paleoecology, and geography, producing an outstanding collection of essays, synthetic analyses, and novel investigations that describe and improve our understanding of the biodiversity of this unique region. With chapters on the Amazon and Caribbean forests, the Atlantic rainforests, the Andes, the Cerrado savannahs, the Caatinga drylands, the Chaco, and Mesoamerica – along with broad taxonomic coverage – this book summarizes a wide range of hypotheses, views, and methods concerning the processes and mechanisms of neotropical diversification. The range of perspectives presented makes the book a truly comprehensive, state-of-the-art publication on the topic, which will fascinate both scientists and general readers alike.

ECOL MIGRANT BIRDS

ECOL MIGRANT BIRDS
Author: RAPPOLE JOHN H.
Publisher: Smithsonian Books (DC)
Total Pages: 296
Release: 1995-11-17
Genre: Nature
ISBN:

Incorporating new information on migratory birds, most gathered within the past decade, this comprehensive synthesis is the first book to explore migration principally from the perspective of the tropical, or nonbreeding, portion of the migrant life cycle.

The Age of Migration

The Age of Migration
Author: Hein de Haas
Publisher: Guilford Publications
Total Pages: 60
Release: 2020-01-16
Genre: Political Science
ISBN: 1462542891

Now with more balanced coverage of Western and non-Western regions, this leading text has been revised and updated with the latest theories, policy information, and interdisciplinary research. The book explores the causes, dynamics, and consequences of international population movements, as well as the experiences of migrants themselves. Chapters examine migration trends and patterns in all major world regions, how migration transforms both destination and origin societies, and the effects of migration and increasing ethnic diversity on national identity and politics. Useful pedagogical features include boxed case studies; extensive tables, graphs, and maps; end-of-chapter Guides to Further Reading; and a companion website with additional case studies, interactive flashcards, and other resources for students and instructors.--

The Great Ordovician Biodiversification Event

The Great Ordovician Biodiversification Event
Author: Barry D. Webby
Publisher: Columbia University Press
Total Pages: 497
Release: 2004-04-14
Genre: Science
ISBN: 0231501633

Two of the greatest evolutionary events in the history of life on Earth occurred during Early Paleozoic time. The first was the Cambrian explosion of skeletonized marine animals about 540 million years ago. The second was the "Great Ordovician Biodiversification Event," which is the focus of this book. During the 46-million-year Ordovician Period (489–443 m.y.), a bewildering array of adaptive radiations of "Paleozoic- and Modern-type" biotas appeared in marine habitats, the first animals (arthropods) walked on land, and the first non-vascular bryophyte-like plants (based on their cryptospore record) colonized terrestrial areas with damp environments. This book represents a compilation by a large team of Ordovician specialists from around the world, who have enthusiastically cooperated to produce this first globally orientated, internationally sponsored IGCP (International Geological Correlation Program) project on Ordovician biotas. The major part is an assembly of genus- and species-level diversity data for the many Ordovician fossil groups. The book also presents an evaluation of how each group diversified through Ordovician time, with assessments of patterns of change and rates of origination and extinction. As such, it will become the standard work and data source for biotic studies on the Ordovician Period.