Author: Publisher: Museum Tusculanum Press
ISBN: 9788763511810
Category :
Languages : en
Pages : 44
Book Description
Spring Migration of Birds Across the Greenland Inlandice
Author: Publisher: Museum Tusculanum Press
ISBN: 9788763511810
Category :
Languages : en
Pages : 44
Book Description
Bird Migration
Author: Eberhard GwinnerPublisher: Springer Science & Business Media
ISBN: 3642745423
Category : Science
Languages : en
Pages : 436
Book Description
E. GWINNER! The phenomenon of bird migration with its large scale dimensions has attracted the attention of naturalists for centuries. Worldwide billions of birds leave their breeding grounds every autumn to migrate to areas with seasonally more favor able conditions. Many of these migrants travel only over a few hundred kilo meters but others cover distances equivalent to the circumference of the earth. Among these long-distance migrants are several billion birds that invade Africa every autumn from their West and Central Palaearctic breeding areas. In the Americas and in Asia the scope of bird migration is of a similar magnitude. Just as impressive as the numbers of birds are their achievements. They have to cope with the enormous energetic costs of long-distance flying. particularly while crossing oceans and deserts that do not allow replenishment of depleted fat reserves. They have to appropriately time the onset and end of migrations. both on a daily and annual basis. And finally. they have to orient their migratory movements in space to reach their species- or population-specific wintering and breeding grounds, irrespective of the variable climatic conditions along their migratory routes.
The Breeding Biology of the Greenland White-fronted Goose (Anser Albifrons Flavirostris)
Author: Publisher: Museum Tusculanum Press
ISBN: 9788763511926
Category :
Languages : en
Pages : 20
Book Description
Bird Migration
Author: Thomas AlerstamPublisher: Cambridge University Press
ISBN: 9780521448222
Category : Nature
Languages : en
Pages : 438
Book Description
Bird migration is one of the most astonishing feats in the natural world. Millions of birds migrate, often over very large distances, to benefit from seasonal resource surpluses and to avoid predators and competitors. The aim of this study is to survey the phenomena.
Wildfowl
Author: Close to the Edge
Author: Theunis PiersmaPublisher:
ISBN:
Category : Birds
Languages : en
Pages : 374
Book Description
Illustrated Moss Flora of Arctic North America and Greenland
Author: Publisher:
ISBN: 9788717055605
Category : Mosses
Languages : en
Pages : 612
Book Description
An Annotated Checklist to the Birds of Greenland
Author: Publisher: Museum Tusculanum Press
ISBN: 9788763512251
Category :
Languages : en
Pages : 68
Book Description
Acta XX Congressus Internationalis Ornithologici, Christchurch, New Zealand, 2-9 December 1990
Author: Ben D. BellPast and Future Rapid Environmental Changes
Author: Brian HuntleyPublisher: Springer Science & Business Media
ISBN: 3642605990
Category : Science
Languages : en
Pages : 520
Book Description
Numerous experts including ecologists, geneticists, paleontologists and climatologists, investigate the response of terrestrial organisms to changes in their environment. The volume comprises an introductory and a final chapter by the editors as well as another 35 contributions. These are divided into six sections: 1. past environmental changes - the late-Quaternary; 2. spatial responses to past changes; 3. mechanisms enabling spatial responses; 4. evolutionary responses to past changes; 5. mechanisms enabling evolutionary responses; 6. predicted future environmental changes and simulated responses. The overwhelming and unanimous conclusion of all contributors is that forecasted global environmental changes pose a severe threat to the integrity of ecosystems worldwide and to the survival of at least some species.