Quantifying the process and abruptness of the end-Permian mass extinction
Quantifying the process and abruptness of the end-Permian mass extinction
复制标题
量化二叠纪末大规模灭绝的过程和突然性
DOI：
10.1666/13022
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发表时间：
2014
期刊：
影响因子：
2.7
通讯作者：
Henderson C.M.
中科院分区：
文献类型：
--
作者：
Wang Yue;Sadler P.M.;Shen Shuzhong;Erwin D.H.;Zhang Yichun;Wang Xiangdong;Wang Wei;Crowley J.L.;Henderson C.M.
摘要对二叠纪末大灭绝的研究表明，从单一的灾难性事件到多个阶段，灭绝模式多种多样。但这些分析大多数都是基于来自单一地点的化石分布。虽然单节可以简化物种多样性的解释，但它们容易受到地层不完整性和保存相控制的影响。在这里，我们使用的数据集的1450个物种，从18个不同的古环境设置在华南和北方冈瓦纳周边地区，并将其与高精度的地质年代学数据，以评估最大的中生代大灭绝的速度。为了减少Signor-Lipps效应，我们应用约束优化（CONOP）来搜索所有物种的第一次和最后一次出现基准的最佳序列，并基于多个部分生成复合生物多样性模式。这一分析表明，62%的物种在200 Kyr内突然灭绝。突然灭绝的开始是在252.3 Ma左右，就在梅山剖面的第25层之下。分类单位的营业额和多样化率表明，生活条件恶化近120万年前突然灭绝。灭绝的规模如此之大，以至于没有立即的生物恢复。先前的建议高度可变，多阶段的灭绝模式反映了Signor-Lipps效应和相依赖的发生的影响，并不支持以下适当的统计处理这一较大的数据集。
Abstract Studies of the end-Permian mass extinction have suggested a variety of patterns from a single catastrophic event to multiple phases. But most of these analyses have been based on fossil distributions from single localities. Although single sections may simplify the interpretation of species diversity, they are susceptible to bias from stratigraphic incompleteness and facies control of preservation. Here we use a data set of 1450 species from 18 fossiliferous sections in different paleoenvironmental settings across South China and the northern peri-Gondwanan region, and integrate it with high-precision geochronologic data to evaluate the rapidity of the largest Phanerozoic mass extinction. To reduce the Signor-Lipps effect, we applied constrained optimization (CONOP) to search for an optimal sequence of first and last occurrence datums for all species and generate a composite biodiversity pattern based on multiple sections. This analysis indicates that an abrupt extinction of 62% of species took place within 200 Kyr. The onset of the sudden extinction is around 252.3 Ma, just below Bed 25 at the Meishan section. Taxon turnover and diversification rates suggest a deterioration of the living conditions nearly 1.2 Myr before the sudden extinction. The magnitude of the extinction was such that there was no immediate biotic recovery. Prior suggestions of highly variable, multi-phased extinction patterns reflect the impact of the Signor-Lipps effect and facies-dependent occurrences, and are not supported following appropriate statistical treatment of this larger data set.
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DOI：
--
发表时间：
2004
期刊：
Earth Science-journal of China University of Geosciences
影响因子：
--
作者：
C. Bin
通讯作者：
C. Bin
影响因子：
1.5
作者：
Xiangdong Wang;T. Sugiyama
通讯作者：
Xiangdong Wang;T. Sugiyama
影响因子：
5.8
作者：
A. Draut;P. Clift
通讯作者：
A. Draut;P. Clift
影响因子：
3.1
作者：
Jin, Yugan;Wang, Yue;Cao, Changqun
通讯作者：
Cao, Changqun
影响因子：
2.7
作者：
Clapham, Matthew E.;Shen, Shuzhong;Bottjer, David J.
通讯作者：
Bottjer, David J.