Titre :	Global warming and plant species richness: a case study of the Paleocene/Eocene boundary
Type de document :	texte imprimé
Auteurs :	Scott L. Wing, Auteur
Année de publication :	1996
Importance :	p 163-185
Langues :	Anglais (eng)
Catégories :	SCIENCES DE LA VIE
Mots-clés :	EFFET DE SERRE  RICHESSE EN ESPECES VEGETALES  CHANGEMENT CLIMATIQUE  TRANSITION PALEOCENE-EOCENE
Résumé :	There is widespread concern over the possibility that greenhouse gases generated by human activity may cause global warming. Much effort is being devoted to monitoring changes in climate and organisms and to modeling the possible effects of greenhouse gases on climatic and biological systems. Programs of monitoring and modeling are necessary but the geological history of the earth and its biota have not been mined thoroughly enough for information about global climate and ecosystem response to climatic change. This chapter focuses on climatic changes and biotic events that took place during the Paleocene-Eocene transition about 55 million years ago. With the exception of the Holocene deglaciation, the Paleocene-Eocene transition is probably the best documented example of a geologically rapid warming of global climate, although just how rapid it is still a matter of investigation. Our distance in time from these events places severe limitations on our ability to determine the rates of environmental and biological changes and especially the synchroneity of events over large geographic areas. Typically, events that are less than 10,000 years apart appear synchronous and records from different parts of the world cannot be correlated with greater than 100,000 year resolution. Still, the Paleocene-Eocene warming event is a close match for extreme predictions of human-induced global warming in terms of the absolute magnitude of warming and final climatic conditions. This makes the Paleocene-Eocene interval a valuable example for improving our understanding of the effect of rapid global warming on terrestrial ecosystems.
Numéro du document :	A/BIO
Niveau Bibliographique :	2
Bull1 (Theme principale) :	BIOLOGIE
Bull2 (Theme secondaire) :	BIOLOGIE GENERALE

Global warming and plant species richness: a case study of the Paleocene/Eocene boundary [texte imprimé] / Scott L. Wing, Auteur . - 1996 . - p 163-185.
Langues : Anglais (eng)

Catégories :	SCIENCES DE LA VIE
Mots-clés :	EFFET DE SERRE  RICHESSE EN ESPECES VEGETALES  CHANGEMENT CLIMATIQUE  TRANSITION PALEOCENE-EOCENE
Résumé :	There is widespread concern over the possibility that greenhouse gases generated by human activity may cause global warming. Much effort is being devoted to monitoring changes in climate and organisms and to modeling the possible effects of greenhouse gases on climatic and biological systems. Programs of monitoring and modeling are necessary but the geological history of the earth and its biota have not been mined thoroughly enough for information about global climate and ecosystem response to climatic change. This chapter focuses on climatic changes and biotic events that took place during the Paleocene-Eocene transition about 55 million years ago. With the exception of the Holocene deglaciation, the Paleocene-Eocene transition is probably the best documented example of a geologically rapid warming of global climate, although just how rapid it is still a matter of investigation. Our distance in time from these events places severe limitations on our ability to determine the rates of environmental and biological changes and especially the synchroneity of events over large geographic areas. Typically, events that are less than 10,000 years apart appear synchronous and records from different parts of the world cannot be correlated with greater than 100,000 year resolution. Still, the Paleocene-Eocene warming event is a close match for extreme predictions of human-induced global warming in terms of the absolute magnitude of warming and final climatic conditions. This makes the Paleocene-Eocene interval a valuable example for improving our understanding of the effect of rapid global warming on terrestrial ecosystems.
Numéro du document :	A/BIO
Niveau Bibliographique :	2
Bull1 (Theme principale) :	BIOLOGIE
Bull2 (Theme secondaire) :	BIOLOGIE GENERALE