Research Abstract


Nutrient-dependent growth underpinned the Ediacaran transition to large body size

2017年7月10日 Nature Ecology & Evolution 1 : 1201 doi: 10.1038/s41559-017-0222-7



Jennifer F. Hoyal Cuthill and Simon Conway Morris

Corresponding Author

Jennifer F. Hoyal Cuthill
東京工業大学 地球生命研究所

Macroscale rangeomorph fossils, with characteristic branching fronds, appear (571 Myr ago) after the Gaskiers glaciation (580 Myr ago). However, biological mechanisms of size growth and potential connections to ocean geochemistry were untested. Using micro-computerized tomography and photographic measurements, alongside mathematical and computer models, we demonstrate that growth of rangeomorph branch internodes declined as their relative surface area decreased. This suggests that frond size and shape were directly responsive to nutrient uptake.