globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0102629
论文题名:
Rebuilding Biodiversity of Patagonian Marine Molluscs after the End-Cretaceous Mass Extinction
作者: Martin Aberhan; Wolfgang Kiessling
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-7-16
卷: 9, 期:7
语种: 英语
英文关键词: Bivalves ; Malacology ; Species extinction ; Gastropods ; Cretaceous period ; Molluscs ; Biodiversity ; Paleoecology
英文摘要: We analysed field-collected quantitative data of benthic marine molluscs across the Cretaceous–Palaeogene boundary in Patagonia to identify patterns and processes of biodiversity reconstruction after the end-Cretaceous mass extinction. We contrast diversity dynamics from nearshore environments with those from offshore environments. In both settings, Early Palaeogene (Danian) assemblages are strongly dominated by surviving lineages, many of which changed their relative abundance from being rare before the extinction event to becoming the new dominant forms. Only a few of the species in the Danian assemblages were newly evolved. In offshore environments, however, two newly evolved Danian bivalve species attained ecological dominance by replacing two ecologically equivalent species that disappeared at the end of the Cretaceous. In both settings, the total number of Danian genera at a locality remained below the total number of late Cretaceous (Maastrichtian) genera at that locality. We suggest that biotic interactions, in particular incumbency effects, suppressed post-extinction diversity and prevented the compensation of diversity loss by originating and invading taxa. Contrary to the total number of genera at localities, diversity at the level of individual fossiliferous horizons before and after the boundary is indistinguishable in offshore environments. This indicates an evolutionary rapid rebound to pre-extinction values within less than ca 0.5 million years. In nearshore environments, by contrast, diversity of fossiliferous horizons was reduced in the Danian, and this lowered diversity lasted for the entire studied post-extinction interval. In this heterogeneous environment, low connectivity among populations may have retarded the recolonisation of nearshore habitats by survivors.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0102629&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/19534
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Berlin, Germany;Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Berlin, Germany;GeoZentrum Nordbayern, Paläoumwelt, Universität Erlangen−Nürnberg, Erlangen, Germany

Recommended Citation:
Martin Aberhan,Wolfgang Kiessling. Rebuilding Biodiversity of Patagonian Marine Molluscs after the End-Cretaceous Mass Extinction[J]. PLOS ONE,2014-01-01,9(7)
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