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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2015 ; 6 (ä): ä Nephropedia Template TP
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Rise to modern levels of ocean oxygenation coincided with the Cambrian radiation of animals #MMPMID25980960
Chen X; Ling HF; Vance D; Shields-Zhou GA; Zhu M; Poulton SW; Och LM; Jiang SY; Li D; Cremonese L; Archer C
Nat Commun 2015[]; 6 (ä): ä PMID25980960show ga
The early diversification of animals (?630?Ma), and their development into both motile and macroscopic forms (?575?565?Ma), has been linked to stepwise increases in the oxygenation of Earth's surface environment. However, establishing such a linkage between oxygen and evolution for the later Cambrian ?explosion' (540?520?Ma) of new, energy-sapping body plans and behaviours has proved more elusive. Here we present new molybdenum isotope data, which demonstrate that the areal extent of oxygenated bottom waters increased in step with the early Cambrian bioradiation of animals and eukaryotic phytoplankton. Modern-like oxygen levels characterized the ocean at ?521?Ma for the first time in Earth history. This marks the first establishment of a key environmental factor in modern-like ecosystems, where animals benefit from, and also contribute to, the ?homeostasis' of marine redox conditions.