[特邀报告]Resilience of infaunal ecosystems during the Early Triassic greenhouse Earth

Resilience of infaunal ecosystems during the Early Triassic greenhouse Earth
编号:2676 稿件编号:1255 访问权限:私有 更新:2023-04-11 23:03:57 浏览:192次 特邀报告

报告开始:2023年05月07日 15:00 (Asia/Shanghai)

报告时间:15min

所在会议:[17B] 17B、古生物、古地理与古环境 » [17B-1] 17B-1 古生物、古地理与古环境

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摘要
The Permian-Triassic mass extinction severely depleted biodiversity, primarily observed in the body fossil of well-skeletonized animals. Understanding how whole ecosystems were affected and rebuilt following the crisis requires evidence from both skeletonized and soft-bodied animals; the best comprehensive information on soft-bodied animals comes from ichnofossils. We analyzed abundant trace fossils from 26 sections across the Permian-Triassic boundary in China and report key metrics of ichnodiversity, ichnodisparity, ecospace utilization, and ecosystem engineering. We find that infaunal ecologic structure was well established in the early Smithian. Decoupling of diversity between deposit feeders and suspension feeders in carbonate ramp-platform settings implies that an effect of trophic group amensalism could have delayed the recovery of nonmotile, suspension-feeding epifauna in the Early Triassic. This differential reaction of infaunal ecosystems to variable environmental controls thus played a substantial but heretofore little appreciated evolutionary and ecologic role in the overall recovery in the hot Early Triassic ocean.
关键字
遗迹化石,生态系统工程,二叠纪-三叠纪,生态空间,生物大灭绝,偏害共栖
报告人
冯学谦
中国地质大学(武汉)

稿件作者
冯学谦 中国地质大学(武汉)
CHENZHONG QIANG 中国地质大学(武汉)
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