| Titre : |
Double jeopardy for migrating wildlife |
| Type de document : |
texte imprimé |
| Auteurs : |
Robert T. Lester, Auteur ; J. Peters Myers, Auteur |
| Editeur : |
Chapman and Hall |
| Année de publication : |
1991 |
| Importance : |
p 119-133 |
| Langues : |
Anglais (eng) |
| Catégories : |
SCIENCES DE L'ENVIRONNEMENT
|
| Mots-clés : |
DOUBLE PERIL SUR LA FAUNE MIGRANTE SYSTEME DE MIGRATION CHANGEMENT CLIMATIQUE CONSERVATION DES ESPECES MIGRANTES SEREGENTI UNGULATE |
| Résumé : |
Global warming promises to transform the natural world, and unable to keep pace with changing climates, many animal and plant populations decline and species are at risk and will be put to extinction.So,one the consequences of this global warming and climatic change is the diminution of the size of the coastal wetlands, boreal forests and arctic and alpine communities. Other ecological effects of global warming will be much more subtle, yet no less profound in their impacts on wildlife and wildlife habitat. For example, changes in the seasonality of temperature, precipitation and other climatologic parameters will have important consequences for many biological phenomena such as flowering , breeding and migration.
Many animals migrate long distances to exploit food and other resources that are unevenly distributed in space and time. Seasonal changes in weather patterns generally control the availability of other resources and thus, the timing of these seasonal changes is of critical importance to migratory animals. Global warming threatens to alter many of the fundamental phenologic relationships that have driven the evolution of migration itself. The double jeopardy for migratory animals lies in their reliance upon the precise timing of resource availabilities and their dependance upon habitats that are themselves especially sensitive to changes in climate.
Shorebirds, because of the specific characteristics of their migratory system and life histories, provide an especially good illustration of how migratory animals could be affected by climate change. Shorebirds will be affected most by global warming due to changes in the timing of migrations and the availability of good resources along their migratory pathways. These changes could lead to serious population declines in some species.
By comparing shorebirds migrations with the migration of ungulates on the Serengeti Plain in East Africa, we could understand how climatic changes could affect different types of migratory systems. The annual migration of ungulates from dry- to wet-season ranges is less constrained in time and space than the long-distance, latitudinal migrations of shorebirds. However, the complexity of biotic interactions associated with this system could leave it equally vulnerable to the climatic changes wrought by global warming. In both cases, global warming will present an unprecedented challenge to the conservation of migratory species.
|
| Numéro du document : |
A/MAC |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
METEOROLOGIE ,ATMOSPHERE,CLIMATOLOGIE |
| Bull2 (Theme secondaire) : |
ATMOSPHERE,CLIMATOLOGIE-CONSIDERATION GENERALE |
Double jeopardy for migrating wildlife [texte imprimé] / Robert T. Lester, Auteur ; J. Peters Myers, Auteur . - Chapman and Hall, 1991 . - p 119-133. Langues : Anglais ( eng)
| Catégories : |
SCIENCES DE L'ENVIRONNEMENT
|
| Mots-clés : |
DOUBLE PERIL SUR LA FAUNE MIGRANTE SYSTEME DE MIGRATION CHANGEMENT CLIMATIQUE CONSERVATION DES ESPECES MIGRANTES SEREGENTI UNGULATE |
| Résumé : |
Global warming promises to transform the natural world, and unable to keep pace with changing climates, many animal and plant populations decline and species are at risk and will be put to extinction.So,one the consequences of this global warming and climatic change is the diminution of the size of the coastal wetlands, boreal forests and arctic and alpine communities. Other ecological effects of global warming will be much more subtle, yet no less profound in their impacts on wildlife and wildlife habitat. For example, changes in the seasonality of temperature, precipitation and other climatologic parameters will have important consequences for many biological phenomena such as flowering , breeding and migration.
Many animals migrate long distances to exploit food and other resources that are unevenly distributed in space and time. Seasonal changes in weather patterns generally control the availability of other resources and thus, the timing of these seasonal changes is of critical importance to migratory animals. Global warming threatens to alter many of the fundamental phenologic relationships that have driven the evolution of migration itself. The double jeopardy for migratory animals lies in their reliance upon the precise timing of resource availabilities and their dependance upon habitats that are themselves especially sensitive to changes in climate.
Shorebirds, because of the specific characteristics of their migratory system and life histories, provide an especially good illustration of how migratory animals could be affected by climate change. Shorebirds will be affected most by global warming due to changes in the timing of migrations and the availability of good resources along their migratory pathways. These changes could lead to serious population declines in some species.
By comparing shorebirds migrations with the migration of ungulates on the Serengeti Plain in East Africa, we could understand how climatic changes could affect different types of migratory systems. The annual migration of ungulates from dry- to wet-season ranges is less constrained in time and space than the long-distance, latitudinal migrations of shorebirds. However, the complexity of biotic interactions associated with this system could leave it equally vulnerable to the climatic changes wrought by global warming. In both cases, global warming will present an unprecedented challenge to the conservation of migratory species.
|
| Numéro du document : |
A/MAC |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
METEOROLOGIE ,ATMOSPHERE,CLIMATOLOGIE |
| Bull2 (Theme secondaire) : |
ATMOSPHERE,CLIMATOLOGIE-CONSIDERATION GENERALE |
|  |
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