Black carbon as a tracer of terrestrial biome distribution in the late Neogene

Title
Black carbon as a tracer of terrestrial biome distribution in the late Neogene
Author(s)
김동현; 이용일; 형기성; 유찬민
KIOST Author(s)
Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)
Publication Year
2014-11-18
Abstract
The evolution and expansion of C4 plants in the late Cenozoic was a dramatic example of terrestrial ecological changes. Fire hypothesis is gaining support as the cause of C4 grassland development in Africa, yet the role of fire in C4 grassland development in other continents still needs to be proved. We present the proportion and stable carbon isotope records of black carbon (BC) of a sediment core from the northeastern equatorial Pacific, covering the past 14.3 million years. Content record of BC in sediment indicates changes in atmospheric circulation and paleoclimate aridity. Stable carbon isotope record of BC reveals not only early expansion of C4 vegetation, but also the C4 maximum period during the Pliocene to Early Pleistocene, and the collapse of C4 dominance in the Late Pleistocene. Records showing expansion of C4 plants after large disturbance of fire support the role of fire as a destructing agent of C3-dominated forest, yet the weak relations between fire and vegetation after C4 expansion event suggest that environmental advantage for C4 plants were necessary factors to keep the dominance of C4 plants during the Late Neogene. Also, comparison between regional data shows that consideration of specific climate event is necessary to interpret BC as a fire-vegetation tracer.and development in other continents still needs to be proved. We present the proportion and stable carbon isotope records of black carbon (BC) of a sediment core from the northeastern equatorial Pacific, covering the past 14.3 million years. Content record of BC in sediment indicates changes in atmospheric circulation and paleoclimate aridity. Stable carbon isotope record of BC reveals not only early expansion of C4 vegetation, but also the C4 maximum period during the Pliocene to Early Pleistocene, and the collapse of C4 dominance in the Late Pleistocene. Records showing expansion of C4 plants after large disturbance of fire support the role of fire as a destructing agent of C3-dominated forest, yet the weak relations between fire and vegetation after C4 expansion event suggest that environmental advantage for C4 plants were necessary factors to keep the dominance of C4 plants during the Late Neogene. Also, comparison between regional data shows that consideration of specific climate event is necessary to interpret BC as a fire-vegetation tracer.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25745
Bibliographic Citation
추계지질과학연합학술대회, pp.138, 2014
Publisher
대한지질학회
Type
Conference
Language
English
Publisher
대한지질학회
Related Researcher
Research Interests

Ocean Geology,Mineral resources,해양지질,광물자원

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