Journal
GEOLOGY
Volume 31, Issue 12, Pages 1093-1096Publisher
GEOLOGICAL SOC AMER, INC
DOI: 10.1130/G19992.1
Keywords
South China Sea; C-13/C-12; paleoecology; monsoon; carbon cycle
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A 30 m.y. stable isotopic record of marine-deposited black carbon from regional terrestrial biomass burning from the northern South China Sea reveals photosynthetic pathway evolution for terrestrial ecosystems in the late Cenozoic. This record indicates that C-3 plants negatively adjusted their isotopic discrimination and C-4 plants appeared gradually as a component of land vegetation in East Asia since the early Miocene, a long time before sudden C-4 expansion occurred during the late Miocene to the Pliocene. The changes in terrestrial ecosystems with time can be reasonably related to the evolution of East Asian monsoons, which are thought to have been induced by several intricate mechanisms during the late Cenozoic and could contribute significantly to the post-Miocene marine carbonate isotope decline.
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