DOI: 10.1038/ngeo2079
论文题名: Functional diversity of marine ecosystems after the Late Permian mass extinction event
作者: Foster W.J. ; Twitchett R.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 3 起始页码: 233
结束页码: 238
语种: 英语
Scopus关键词: biotic factor
; fossil record
; functional change
; global warming
; lifestyle
; marine ecosystem
; mass extinction
; Permian
; Invertebrata
英文摘要: The Late Permian mass extinction event about 252 million years ago was the most severe biotic crisis of the past 500 million years and occurred during an episode of global warming. The loss of around two-thirds of marine genera is thought to have had substantial ecological effects, but the overall impacts on the functioning of marine ecosystems and the pattern of marine recovery are uncertain. Here we analyse the fossil occurrences of all known benthic marine invertebrate genera from the Permian and Triassic periods, and assign each to a functional group based on their inferred lifestyle. We show that despite the selective extinction of 62-74% of these genera, all but one functional group persisted through the crisis, indicating that there was no significant loss of functional diversity at the global scale. In addition, only one new mode of life originated in the extinction aftermath. We suggest that Early Triassic marine ecosystems were not as ecologically depauperate as widely assumed. Functional diversity was, however, reduced in particular regions and habitats, such as tropical reefs; at these smaller scales, recovery varied spatially and temporally, probably driven by migration of surviving groups. We find that marine ecosystems did not return to their pre-extinction state, and by the Middle Triassic greater functional evenness is recorded, resulting from the radiation of previously subordinate groups such as motile, epifaunal grazers. © 2014 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106516
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Plymouth University, School of Geography, Earth and Environmental Sciences, Drake-Circus-Plymouth PL4 8AA, United Kingdom
Recommended Citation:
Foster W.J.,Twitchett R.J.. Functional diversity of marine ecosystems after the Late Permian mass extinction event[J]. Nature Geoscience,2014-01-01,7(3)