| DOI: | 10.1016/j.gloplacha.2014.07.014
|
| 论文题名: | The global vegetation pattern across the Cretaceous-Paleogene mass extinction interval: A template for other extinction events |
| 作者: | Vajda V.; Bercovici A.
|
| ISSN: | 0921-8518
|
| 出版年: | 2014
|
| 卷: | 122 | | 起始页码: | 29
|
| 结束页码: | 49
|
| 语种: | 英语
|
| 英文关键词: | Asteroid
; Biostratigraphy
; CAMP
; End-Permian
; End-Triassic
; P-T boundary
; Palynology
; Siberian traps
; Tr-J boundary
|
| Scopus关键词: | Asteroids
; Biostratigraphy
; Recovery
; Stratigraphy
; Biostratigraphy
; CAMP
; end-Permian
; End-Triassic
; P-T boundary
; Palynology
; Siberian Traps
; Tr-J boundary
; Vegetation
; Asteroids
; asteroid
; biostratigraphy
; Cretaceous-Tertiary boundary
; mass extinction
; Paleogene
; palynology
; Permian-Triassic boundary
; pollen
; spore
; taxonomy
; chronostratigraphy
; Cretaceous
; datum
; global change
; pioneer species
; succession
; temporal analysis
; vegetation history
; Bay of Campeche
; Chicxulub Crater
; Mexico [North America]
; Yucatan
|
| 英文摘要: | Changes in pollen and spore assemblages across the Cretaceous-Paleogene (K-Pg) boundary elucidate the vegetation response to a global environmental crisis triggered by an asteroid impact in Mexico 66. Ma. The Cretaceous-Paleogene boundary clay, associated with the Chicxulub asteroid impact event, constitutes a unique, global marker bed enabling comparison of the world-wide palynological signal spanning the mass extinction event. The data from both hemispheres are consistent, revealing diverse latest Cretaceous assemblages of pollen and spores that were affected by a major diversity loss as a consequence of the K-Pg event. Here we combine new results with past studies to provide an integrated global perspective of the terrestrial vegetation record across the K-Pg boundary. We further apply the K-Pg event as a template to asses the causal mechanism behind other major events in Earths history. The end-Permian, end-Triassic, and the K-Pg mass-extinctions were responses to different causal processes that resulted in essentially similar succession of decline and recovery phases, although expressed at different temporal scales. The events share a characteristic pattern of a bloom of opportunistic "crisis" tax followed by a pulse in pioneer communities, and finally a recovery in diversity including evolution of new taxa. Based on their similar extinction and recovery patterns and the fact that the Last and First Appearance Datums associated with the extinctions are separated in time, we recommend using the K-Pg event as a model and to use relative abundance data for the stratigraphic definition of mass-extinction events and the placement of associated chronostratigraphic boundaries. © 2014. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906508150&doi=10.1016%2fj.gloplacha.2014.07.014&partnerID=40&md5=6928cc65a4eb4d858ac7c159fc81a1e8
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11424
|
| Appears in Collections: | 全球变化的国际研究计划
|
|
There are no files associated with this item.
|
|
作者单位: | Department of Geology, Lund University, Sölvegatan 12, 223 62 Lund, Sweden
|
| Recommended Citation: | |
Vajda V.,Bercovici A.. The global vegetation pattern across the Cretaceous-Paleogene mass extinction interval: A template for other extinction events[J],2014-01-01,122.
|
|
|