Chemo synthesis-based associations on Cretaceous plesiosaurid carcasses
Chemo synthesis-based associations on Cretaceous plesiosaurid carcasses
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DOI：
10.4202/app.2008.0106
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发表时间：
2008-02-01
影响因子：
1.8
通讯作者：
Tanabe, Kazushige
中科院分区：
文献类型：
--
作者：
Kaim, Andrzej;Kobayashi, Yoshitsugij;Tanabe, Kazushige
本报告的目的是记录第一次中生代发生的化学合成为基础的社区发展的大型海洋爬行动物尸体。在日本北方北海道晚白垩世沉积物中发现了与蛇颈龙类骨骼有关的微食草原足类腹足类（化能合成群落的典型）。所研究的蛇颈龙骨的松质骨在骨小梁内含有普遍存在的硫化铁，这提供了骨脂质厌氧硫酸盐还原的证据。我们还报告了骨小梁中的许多微穿孔，这可能是由硫氧化细菌的活动引起的。这一发现解决了鲸骨动物群的出现和辐射这一激烈争论的问题。我们假设，脊椎动物的骨骼环境在西北太平洋地区的动物定居反复从一个区域池的化学合成为基础的社区，蓬勃发展的甲烷渗漏和/或热喷口，在晚白垩世-中新世。
The objective of this report is to document first Mesozoic occurrences of chemosynthesis-based communities developed on large marine reptile carcasses. Micro-grazing provannid gastropods (typical of chemosynthetic communities) are associated with plesiosaurid skeletons in the Upper Cretaceous deposits of Hokkaido, northern Japan. The cancellous bones of the examined plesiosaurid bones contain a ubiquity of iron sulfides within the bone trabeculae, which provides evidence of anaerobic sulfate reduction of the bone lipids. We also report numerous microborings in the bone trabeculae, which might result from the activity of sulfur-oxidizing bacteria. This finding addresses the hotly debated problem of the emergence and radiation of whale bone faunas. We postulate that vertebrate bone environments in the Northwest Pacific region were settled repeatedly by animals from a regional pool of chemosynthesis-based communities that flourished in the methane seeps and/or hot vents that were present during the Late Cretaceous-Miocene.