Phytoplankton (acritarch) community changes during the Permian-Triassic transition in South China
Phytoplankton (acritarch) community changes during the Permian-Triassic transition in South China
复制标题
华南二叠纪-三叠纪过渡期浮游植物群落变化
DOI：
10.1016/j.palaeo.2018.09.033
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发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
Jianxin Yu
中科院分区：
文献类型：
--
作者：
Yong Lei;Jun Shen;Thomas J. Algeo;Thomas Servais;Qinglai Feng;Jianxin Yu
二叠纪-三叠纪界线（PTB）在~252 Ma与中生代最大的生物灭绝相吻合。以往关于这一事件期间多样性和丰度变化的研究主要集中在陆地脊椎动物和海洋无脊椎动物的记录上，很少关注构成海洋营养网基础的浮游植物的数据。虽然二叠纪-三叠纪浮游植物的化石记录是相对贫穷的，由于灭绝的因素，现在有足够的材料来评估长期的变化，疑源类群落通过大规模灭绝的间隔。在这篇文章中，我们评估了8属25种疑源类的多样性和丰度的变化，包括大球形，小球形，长刺，短刺的形式，从上二叠统Clarkina yini到下三叠统Isarcicella isarcicazones在8个代表不同沉积相的剖面。疑源类从最晚的二叠纪（C。meishanensisZone）至早三叠世（I. staescheiZone），沉积和丰度变化集中在两个层位，第一个层位在二叠纪末。梅山带（梅山D 25层）和第二带。staescheiZone（梅山D的28层），反映了海洋无脊椎动物的死亡模式。这两个灭绝事件的性质和强度的差异（第二个有一个相对较大的影响疑源类群落组成）表明，这些事件可能是由不同类型的环境扰动。
The Permian-Triassic boundary (PTB) at ~252 Ma coincided with the largest mass extinction of the Phanerozoic. Previous research on diversity and abundance changes during this event has focused mainly on the terrestrial vertebrate and marine invertebrate records, with little attention to date given to the phytoplankton that form the base of the marine trophic web. Although the fossil record of Permian-Triassic phytoplankton is relatively poor owing to preservational factors, sufficient material is now available to evaluate secular changes in acritarch communities through the mass extinction interval. In this contribution, we evaluate diversity and abundance changes among 8 genera and 25 species of acritarchs, including large-spherical, small-spherical, long-spined, and short-spined forms ranging from the Upper PermianClarkina yinito the Lower TriassicIsarcicella isarcicazones in eight sections representing different sedimentary facies of the South China Craton. Acritarchs declined sharply from the latest Permian (C. meishanensisZone) to the earliest Triassic (I. staescheiZone), with extinctions and abundance changes concentrated at two horizons, the first in the latest PermianC. meishanensisZone (Bed 25 at Meishan D) and the second in the earliest TriassicI. staescheiZone (Bed 28 at Meishan D), mirroring the pattern of mortality among marine invertebrates. Differences in the nature and intensity of these two extinction episodes (the second having a relatively larger effect on acritarch community composition) suggest that these events may have resulted from different types of environmental perturbations.
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影响因子：
--
作者：
Hongxia Jiang;Yasheng Wu;C. Cai
通讯作者：
Hongxia Jiang;Yasheng Wu;C. Cai
影响因子：
1.9
作者：
K. Zonneveld;G. Versteegh;Monika Kodrans-Nsiah
通讯作者：
K. Zonneveld;G. Versteegh;Monika Kodrans-Nsiah
影响因子：
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作者：
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通讯作者：
K. Zonneveld;G. Versteegh;G. Lange
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影响因子：
3.7
作者：
J. Shen;T. J. Algeo;L. Zhou;Q. Feng;J. Yu;B. Ellwood
通讯作者：
B. Ellwood
影响因子：
5.8
作者：
A. Draut;P. Clift
通讯作者：
A. Draut;P. Clift