The Early Origin of the Antarctic Marine Fauna and Its Evolutionary Implications.
The Early Origin of the Antarctic Marine Fauna and Its Evolutionary Implications.
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DOI：
10.1371/journal.pone.0114743
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Bowman VC
中科院分区：
文献类型：
--
作者：
Crame JA;Beu AG;Ineson JR;Francis JE;Whittle RJ;Bowman VC
南极半岛东北部西摩岛广泛的晚白垩世-早第三纪沉积序列为研究现代极地海洋动物群的进化起源提供了一个无与伦比的机会。大约38个现代南大洋软体动物属（26个腹足类和12个双壳类），约占现代底栖软体动物区系总数的18%，现在至少可以追溯到这个序列的一部分。正如世界上其他地方所指出的，软体动物群的平衡在白垩纪-古近纪（K/Pg）边界发生了急剧变化，腹足动物随后变得比双壳类更加多样化。其中一个主要原因是新腹足类的显著辐射，它今天形成了海洋中最多样化的分支之一。Buccinoidea是古新世索布拉尔组（SF）和早-中始新世La Meseta组（LMF）中的主要新腹足类总科（占新腹足类属的56%），Conoidea（25%）是后者中首次出现的。新腹足类的这种辐射与至少达到65°S的显著全球变暖脉冲有关，并在LMF上部突然终止，这很可能预示着全球变冷的开始。这也可能是显着的早古近纪扩张的新腹足类在南极洲是部分由于全球增加的起源率后，K/Pg大灭绝事件。这个分支和其他分支在南纬165 °的辐射表明，在始新世早期到中期，南极洲不一定是一个进化的避难所，或汇。古近纪温室世界和新近纪冰室世界的源-汇演化动力学可能有很大的不同.
The extensive Late Cretaceous – Early Paleogene sedimentary succession of Seymour Island, N.E. Antarctic Peninsula offers an unparalleled opportunity to examine the evolutionary origins of a modern polar marine fauna. Some 38 modern Southern Ocean molluscan genera (26 gastropods and 12 bivalves), representing approximately 18% of the total modern benthic molluscan fauna, can now be traced back through at least part of this sequence. As noted elsewhere in the world, the balance of the molluscan fauna changes sharply across the Cretaceous – Paleogene (K/Pg) boundary, with gastropods subsequently becoming more diverse than bivalves. A major reason for this is a significant radiation of the Neogastropoda, which today forms one of the most diverse clades in the sea. Buccinoidea is the dominant neogastropod superfamily in both the Paleocene Sobral Formation (SF) (56% of neogastropod genera) and Early - Middle Eocene La Meseta Formation (LMF) (47%), with the Conoidea (25%) being prominent for the first time in the latter. This radiation of Neogastropoda is linked to a significant pulse of global warming that reached at least 65°S, and terminates abruptly in the upper LMF in an extinction event that most likely heralds the onset of global cooling. It is also possible that the marked Early Paleogene expansion of neogastropods in Antarctica is in part due to a global increase in rates of origination following the K/Pg mass extinction event. The radiation of this and other clades at ∼65°S indicates that Antarctica was not necessarily an evolutionary refugium, or sink, in the Early – Middle Eocene. Evolutionary source – sink dynamics may have been significantly different between the Paleogene greenhouse and Neogene icehouse worlds.
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影响因子：
1.9
作者：
Bowman, Vanessa C.;Francis, Jane E.;Haywood, Alan M.
通讯作者：
Haywood, Alan M.
DOI：
10.1073/pnas.1321441111
发表时间：
2014-05-06
影响因子：
11.1
作者：
Douglas, Peter M. J.;Affek, Hagit P.;Pagani, Mark
通讯作者：
Pagani, Mark
影响因子：
56.9
作者：
Alroy, J.
通讯作者：
Alroy, J.
影响因子：
64.8
作者：
Bijl, Peter K.;Schouten, Stefan;Brinkhuis, Henk
通讯作者：
Brinkhuis, Henk
影响因子：
3.5
作者：
Bellwood, DR
通讯作者：
Bellwood, DR