Algal plankton turn to hunting to survive and recover from end-Cretaceous impact darkness.
Algal plankton turn to hunting to survive and recover from end-Cretaceous impact darkness.
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DOI：
10.1126/sciadv.abc9123
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发表时间：
2020-10
期刊：
影响因子：
13.6
通讯作者：
Ridgwell A
中科院分区：
文献类型：
--
作者：
Gibbs SJ;Bown PR;Ward BA;Alvarez SA;Kim H;Archontikis OA;Sauterey B;Poulton AJ;Wilson J;Ridgwell A
在白垩纪末期小行星撞击后，浮游藻类通过捕猎在黑暗中幸存下来，重新征服了海洋。白垩纪末期的流星撞击引发了海洋生态系统的破坏。然而，具体的杀死机制(S)仍然存在争议，随后如何恢复初级生产仍然难以捉摸。我们使用海洋浮游生物微化石和生态进化模型来确定生存和恢复的策略，发现广泛的吞噬(猎物摄取)是浮游生物在冲击中幸存下来的基础，也是随后恢复初级生产的基础。生态选择性指向极端的撞击后光抑制作为主要的杀死机制，海洋食物链暂时重新设置为细菌主导的状态。随后，在阳光灿烂的海洋中，只有稀有的幸存食草动物，但有大量的小型猎物，正是混合营养营养(自养和异养)和不断增大的细胞尺寸使大约200万年后海洋食物网最终得以重建。
Algal plankton survived darkness and reconquered the oceans by resorting to hunting after the end-Cretaceous asteroid impact. The end-Cretaceous bolide impact triggered the devastation of marine ecosystems. However, the specific kill mechanism(s) are still debated, and how primary production subsequently recovered remains elusive. We used marine plankton microfossils and eco-evolutionary modeling to determine strategies for survival and recovery, finding that widespread phagotrophy (prey ingestion) was fundamental to plankton surviving the impact and also for the subsequent reestablishment of primary production. Ecological selectivity points to extreme post-impact light inhibition as the principal kill mechanism, with the marine food chain temporarily reset to a bacteria-dominated state. Subsequently, in a sunlit ocean inhabited by only rare survivor grazers but abundant small prey, it was mixotrophic nutrition (autotrophy and heterotrophy) and increasing cell sizes that enabled the eventual reestablishment of marine food webs some 2 million years later.
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影响因子：
2.1
作者：
Gentleman, W. C.;Neuheimer, A. B.
通讯作者：
Neuheimer, A. B.
影响因子：
5.8
作者：
Birch, Heather S.;Coxall, Helen K.;Schmidt, Daniela N.
通讯作者：
Schmidt, Daniela N.
影响因子：
5.8
作者：
Bown, P
通讯作者：
Bown, P
影响因子：
5.3
作者：
Dinares-Turell, Jaume;Westerhold, Thomas;Kroon, Dick
通讯作者：
Kroon, Dick
DOI：
10.1016/j.palaeo.2007.02.045
发表时间：
2007-11-02
影响因子：
3
作者：
Bernaola, Gilen;Monechi, Simonetta
通讯作者：
Monechi, Simonetta