Vertebrate coprolites from Middle Triassic Chang 7 Member in Ordos Basin, China: Palaeobiological and palaeoecological implications
Vertebrate coprolites from Middle Triassic Chang 7 Member in Ordos Basin, China: Palaeobiological and palaeoecological implications
复制标题
中国鄂尔多斯盆地中三叠世长7段脊椎动物粪化石：古生物学和古生态学意义
DOI：
10.1016/j.palaeo.2022.111084
复制
发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
Dayong Jiang
中科院分区：
文献类型：
--
作者：
Mingtao Yao;Zuoyu Sun;Qingqiang Meng;Jiachun Li;Dayong Jiang
鄂尔多斯盆地长7段拉丁纪早期湖泊生态系统被认为是二叠纪末生物大灭绝（EPME）后已知最早的中生代型营养多层次湖泊生态系统。然而，以掠食性鱼类为代表的高阶营养级的证据有限，使得这一结论难以捉摸。本研究对陕西省铜川市霸王庄剖面长7段延长组富含有机质湖泊沉积物中的54个脊椎动物粪化石进行了外部形态、食物包裹体和地球化学组成的研究。这些粪化石被鉴定为三组七种形态类型：三种异极螺旋形式、两种两极螺旋形式和两种非螺旋形式。保存下来的内含物（鱼鳞、骨头碎片、牙齿）表明这些粪化石的生产者是食鱼动物。与之前研究的粪化石相比，本文描述的所有粪化石都被推断是由鱼类产生的：三种异极类型的螺旋粪化石来自三种类型的弓鲛类，两种两极螺旋粪化石来自腔棘鱼或具有简单螺旋瓣的梭鱼，以及来自至少两种捕食性放线鱼的非螺旋粪化石。因此，湖泊古生态系统的生物多样性，特别是营养级较高的捕食者的生物多样性得到了极大的丰富。在营养多级（至少六级）的湖泊生态系统中，不同类群的大型肉食性捕食者作为顶级捕食者的存在，表明鄂尔多斯盆地早期拉丁阶湖泊生态系统的存在，标志着鄂尔多斯盆地顶级捕食性营养结构的重建。 EPME 之后的湖泊生态系统。
The early Ladinian lacustrine ecosystem of the Chang 7 Member in the Ordos Basin was proposed as the earliest known Mesozoic-type, trophically multileveled lacustrine ecosystem after the end-Permian mass extinction (EPME). However, limited evidence of higher-order trophic levels represented by predatory fish has made this conclusion elusive. In this study, we investigated the external morphology, food inclusions, and geochemical.composition of 54 vertebrate coprolites from organic-rich lacustrine sediments of Chang 7 Member, Yanchang Formation, in the Bawangzhuang section, Tongchuan City, Shaanxi Province, China. These coprolites were identified as seven morphotypes in three groups: three heteropolar spiral forms, two amphipolar spiral forms, and two non-spiral forms. Preserved inclusions (fish scales, bone fragments, teeth) indicated that the producers of these coprolites were piscivorous animals. Compared with coprolites previously researched, all coprolites described herein were inferred to be produced by fish: three heteropolar types of spiral coprolites derived from.three types of hybodonts, two amphipolar spiral coprolites from coelacanth or Saurichthys with simple spiral.valves, and non-spiral coprolites from at least two predatory actinopterygians. Thus, the biodiversity of the.lacustrine paleoecosystem, particularly that of predators with upper trophic levels, was substantially enriched..The existence of large carnivorous predators of different taxa as apex predators in a trophically multileveled (at.least six levels) lacustrine ecosystem indicates that the early Ladinian lacustrine ecosystem of the Ordos Basin.marks the rebuilding of the top-predator trophic structure in the lacustrine ecosystem after the EPME.
登录
查看更多内容
DOI：
10.1016/j.palaeo.2019.02.002
发表时间：
2019-04
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Piotr Bajdek;T. Szczygielski;A. Kapuścińska;T. Sulej
通讯作者：
Piotr Bajdek;T. Szczygielski;A. Kapuścińska;T. Sulej
DOI：
10.1016/j.palaeo.2017.11.048
发表时间：
2018-01-15
影响因子：
3
作者：
Dentzien-Dias, Paula;Carrillo-Briceno, Jorge Domingo;Sanchez, Rodolfo
通讯作者：
Sanchez, Rodolfo
DOI：
10.1016/j.palaeo.2014.06.013
发表时间：
2014-10-01
影响因子：
3
作者：
Bajdek, Piotr;Owocki, Krzysztof;Niedzwiedzki, Grzegorz
通讯作者：
Niedzwiedzki, Grzegorz
影响因子：
2.3
作者：
A. Tintori
通讯作者：
A. Tintori
DOI：
10.1002/jez.629
发表时间：
2010-11-01
影响因子：
2.8
作者：
Fritz, Julia;Hummel, Juergen;Clauss, Marcus
通讯作者：
Clauss, Marcus