globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12216
Scopus记录号: 2-s2.0-84990061953
论文题名:
A trophic framework for animal origins
作者: Mills D.B.; Canfield D.E.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2017
卷: 15, 期:2
起始页码: 197
结束页码: 210
语种: 英语
Scopus关键词: ancestry ; benthos ; dissolved organic matter ; eukaryote ; evolution ; feeding behavior ; food web ; historical ecology ; metazoan ; Phanerozoic ; picoplankton ; Proterozoic ; Animalia ; Eukaryota ; Metazoa ; organic compound ; animal ; evolution ; feeding behavior ; heterotrophy ; metabolism ; phagocytosis ; Animals ; Biological Evolution ; Feeding Behavior ; Heterotrophic Processes ; Organic Chemicals ; Phagocytosis
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Metazoans emerged in a microbial world and play a unique role in the biosphere as the only complex multicellular eukaryotes capable of phagocytosis. While the bodyplan and feeding mode of the last common metazoan ancestor remain unresolved, the earliest multicellular stem-metazoans likely subsisted on picoplankton (planktonic microbes 0.2–2�μm in diameter) and dissolved organic matter (DOM), similarly to modern sponges. Once multicellular stem-metazoans emerged, they conceivably modulated both the local availability of picoplankton, which they preferentially removed from the water column for feeding, and detrital particles 2–100�μm in diameter, which they expelled and deposited into the benthos as waste products. By influencing the availability of these heterotrophic food sources, the earliest multicellular stem-metazoans would have acted as ecosystem engineers, helping create the ecological conditions under which other metazoans, namely detritivores and non-sponge suspension feeders incapable of subsisting on picoplankton and DOM, could emerge and diversify. This early style of metazoan feeding, specifically the phagocytosis of small eukaryotic prey, could have also encouraged the evolution of larger, even multicellular, eukaryotic forms less prone to metazoan consumption. Therefore, the first multicellular stem-metazoans, through their feeding, arguably helped bridge the strictly microbial food webs of the Proterozoic Eon (2.5–0.541 billion years ago) to the more macroscopic, metazoan-sustaining food webs of the Phanerozoic Eon (0.541–0 billion years ago). � 2016 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85066
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Biology, Nordic Center for Earth Evolution, University of Southern Denmark, Odense, Denmark

Recommended Citation:
Mills D.B.,Canfield D.E.. A trophic framework for animal origins[J]. Geobiology,2017-01-01,15(2)
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