Evolution of animal multicellularity stimulated by dissolved organic carbon in early Ediacaran ocean: DOXAM hypothesis
Kano, Akihiro1; Kunimitsu, Yoko1; Togo, Tetsuhiro2; Takashima, Chiduru3; Shiraishi, Fumito1; Wang, Wei (王伟)4
2011-06-01
发表期刊ISLAND ARC
ISSN1038-4871
卷号20期号:2页码:280-293
摘要

Oxygenation of the ocean is presumed to be an important factor stimulating the evolution of multicellular animals. The appearance of the Ediacaran-type biota (ca 575 Ma) was assigned to the aftermath of the Gaskiers glaciation (ca 580 Ma), when substantial oceanic oxygenation is believed to have started. However, several lines of evidence reveal that at least sponges evolved before this oxygenation. For understanding the first stage of animal evolution, we propose the hypothesis that Dissolved Organic Carbon (DOC) Stimulated the evolution for Animal Multicellularity (DOXAM). Recent geochemical studies of the Ediacaran sedimentary sequences have indicated that a substantial DOC mass was developed in the stratified ocean after the Marinoan glaciation (655-635 Ma), and this was supported by the inorganic and organic carbon isotope profiles of the Doushantuo Formation in South China. The DOC mass was an oxygen consumer in the water column; however, it could have provided a food source for filter-feeding animals such as sponges and cnidarians, and established a primitive food-web. Such an ecological structure is recognized in modern deep-sea coral mounds. Results from the integrated ocean drilling program (IODP) Expedition 307 for a mound in northeastern Atlantic suggested that organic carbon suspended around the density boundary in the water column is the key feature to feed the heterotrophic deep-sea coral community. Our hypothesis is consistent with the fact that the two most primitive animal phyla (Porifera and Cnidaria) are filter feeders. The evolution of filter feeding ecosystems removed the DOC mass and may have contributed to ocean oxygenation in the terminal Neoproterozoic when animal evolution passed into the second stage, with the appearance of bilaterians.

关键词Animal Evolution Carbon Isotope Dissolved Organic Carbon Doushantuo Formation Iodp Neoproterozoic
DOI10.1111/j.1440-1738.2011.00767.x
语种英语
关键词[WOS]Neoproterozoic Doushantuo Formation ; Water Coral Mound ; South China ; Yangtze Platform ; Snowball-earth ; Age Constraints ; Origin ; Glaciations ; Oxygenation ; Acritarchs
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000291043400009
出版者WILEY-BLACKWELL
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/482
专题中国科学院南京地质古生物研究所
其他
通讯作者Kano, Akihiro
作者单位1.Kyushu Univ, Grad Sch Social & Cultural Studies, Fukuoka 8190395, Japan
2.Hiroshima Univ, Dept Earth & Planetary Syst Sci, Higashihiroshima 7398526, Japan
3.Saga Univ, Fac Culture & Educ, Human Life & Environm Course, Saga 8408502, Japan
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
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GB/T 7714
Kano, Akihiro,Kunimitsu, Yoko,Togo, Tetsuhiro,et al. Evolution of animal multicellularity stimulated by dissolved organic carbon in early Ediacaran ocean: DOXAM hypothesis[J]. ISLAND ARC,2011,20(2):280-293.
APA Kano, Akihiro,Kunimitsu, Yoko,Togo, Tetsuhiro,Takashima, Chiduru,Shiraishi, Fumito,&Wang, Wei .(2011).Evolution of animal multicellularity stimulated by dissolved organic carbon in early Ediacaran ocean: DOXAM hypothesis.ISLAND ARC,20(2),280-293.
MLA Kano, Akihiro,et al."Evolution of animal multicellularity stimulated by dissolved organic carbon in early Ediacaran ocean: DOXAM hypothesis".ISLAND ARC 20.2(2011):280-293.
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