A juvenile-rich palaeocommunity of the lower Cambrian Chengjiang biota sheds light on palaeo-boom or palaeo-bust environments.

Autor: Yang X; Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, Kunming, China. yangxf@ynu.edu.cn.; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming, China. yangxf@ynu.edu.cn.; State Key Laboratory of Palaeobiology and Stratigraphy, Chinese Academy of Sciences, Nanjing, China. yangxf@ynu.edu.cn., Kimmig J; Earth and Mineral Sciences Museum and Art Gallery, The Pennsylvania State University, University Park, PA, USA. jkimmig@psu.edu., Zhai D; Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, Kunming, China.; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming, China., Liu Y; Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, Kunming, China.; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming, China., Kimmig SR; Laboratory for Isotopes and Metals in the Environment (LIME), Earth and Environmental Systems Institute, The Pennsylvania State University, University Park, PA, USA., Peng S; State Key Laboratory of Palaeobiology and Stratigraphy, Chinese Academy of Sciences, Nanjing, China.
Jazyk: angličtina
Zdroj: Nature ecology & evolution [Nat Ecol Evol] 2021 Aug; Vol. 5 (8), pp. 1082-1090. Date of Electronic Publication: 2021 Jun 28.
DOI: 10.1038/s41559-021-01490-4
Abstrakt: The fossil record, including the record of Burgess Shale-type deposits, is biased towards late ontogenetic stages. Larval stages, juvenile and subadult specimens exist but are very rare and often preserved as phosphatic fossils, resulting in biased population structures. Here, we report a new Burgess Shale-type Lagerstätte from Haiyan, China. The Haiyan palaeocommunity is extraordinary in that it is rich in fossils of early and middle ontogenetic stages of various phyla, with eggs also commonly found in the studied interval. This Lagerstätte also hosts a considerable number of new taxa-many related to later biotas of Gondwana and Laurentia. We propose that the deposit may either preserve one of the earliest nurseries in the fossil record or, alternatively, records several attempted invasions. Our study highlights the complexity of biotas and their interactions in the lower Cambrian ocean and calls for a better understanding of the mechanisms responsible for the observed spatial variation of fossil community composition in the Cambrian.
(© 2021. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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