Conodont size reduction and diversity losses during the Carnian Humid Episode in SW China
Conodont size reduction and diversity losses during the Carnian Humid Episode in SW China
复制标题
中国西南部卡尼期湿润期牙形刺尺寸减小和多样性丧失
DOI：
10.1144/jgs2018-002
复制
发表时间：
2018-06
影响因子：
2.7
通讯作者：
Lai X L
中科院分区：
文献类型：
--
作者：
Zhang Z T;Sun Y D;Wignall P B;Fu J L;Li H X;Wang M Y;Lai X L
研究了华南地区卡尼期湿幕（CHE）期间的生物和环境变化。牙形刺的身体大小，评估为P1元素的长度，和他们的多样性在中期卡尼的实质性变化。中国西南地区的隆昌、永跃和菜子塘剖面记录了从浅海碳酸盐台地到深水深水盆地的古环境变迁。所有剖面都显示，在朱利安1晚期，随着快速变暖和海洋缺氧，牙形石多样性和丰度大幅丧失。牙形石的大小看到了减少的最大，平均值和最小尺寸在朱利安2到图瓦卢2间隔造成的短命的外观小物种和尺寸减小的幸存者。牙形石平均大小的减少正好与海洋euxinia或缺氧和温度波动在朱利安2图瓦卢2间隔。因此卡尼牙形刺遵循伯格曼法则：元素大小与温度成反比。气候变暖与海洋缺氧或洋地黄的发展可能是直接负责在这个时候的生物变化。补充材料：来自隆昌（LC）、永跃（NR）和菜子塘（CZ）剖面的牙形石长度数据以及隆昌剖面估计温度与牙形石平均大小之间的交会图数据可在www.example.com上获得https://doi.org/10.6084/m9.figshare.c.4114424
The enigmatic biotic and environmental changes during the Carnian Humid Episode (CHE) have been investigated in South China. The body size of conodonts, assessed as length of P1 elements, and their diversity show substantial changes in the mid-Carnian. The well-dated Long Chang, Yongyue and Caizitang sections in southwestern China record a change of palaeoenvironments from shallow-marine carbonate platforms to deeper, euxinic basins. All sections show a major loss of conodont diversity and abundance late in the Julian 1 at a time of rapid warming and marine anoxia. Conodont size saw a reduction in maximum, mean and minimum size during the Julian 2 to Tuvalian 2 interval caused by the short-lived appearance of small species and a size decrease of the survivors. Conodont mean size reduction coincided with marine euxinia or anoxia and temperature fluctuations during the Julian 2 to Tuvalian 2 interval. Carnian conodonts thus follow Bergmann's Rule: element size is inversely correlated to the temperature. Climate warming with the consequential development of marine anoxia or euxinia is probably directly responsible for biotic changes at this time. Supplementary material: Conodont length data from the Long Chang (LC), Yongyue (NR) and Caizitang (CZ) sections and data for the cross plot between estimated temperature and conodont mean size in the Long Chang section are available at https://doi.org/10.6084/m9.figshare.c.4114424
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DOI：
10.1016/j.palaeo.2015.07.046
发表时间：
2016-04
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
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影响因子：
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