Subject Code:C04With the support by the National Natural Science Foundation of China,a collaborative study by Chinese and American biologists led by Prof.Zhang Peng(张鹏)from Sun Yat-Sen University shows that nearly n...Subject Code:C04With the support by the National Natural Science Foundation of China,a collaborative study by Chinese and American biologists led by Prof.Zhang Peng(张鹏)from Sun Yat-Sen University shows that nearly nine out of 10species of frog today have descended from just three lineages that survived the展开更多
The co-evolution of climate-environment and ancient vertebrates fossil human are core topics in the theory of biological evolution.At the micro level,we hope to understand the feeding habits of some important groups o...The co-evolution of climate-environment and ancient vertebrates fossil human are core topics in the theory of biological evolution.At the micro level,we hope to understand the feeding habits of some important groups of organisms in ancient ecosystems,such as dinosaurs,birds,and mammals,as well as their related feeding behaviors,migration patterns,and ecological niches.This requires a comprehensive analysis of key global climate processes during critical periods,the evolution of terrestrial ecosystems,and their relationship with the origin,evolution,and extinction of ancient fossil fauna.Similarly,changes in global climate and ancient monsoon systems have played important roles in the origin,migration,diffusion and behavioral patterns of ancient human being.The domestication of animals and plants and the origin of agriculture are the most representative examples of the co-evolution of human and ecosystem.The early agricultural society not only adapted to most of the area of the terrestrial ecosystem,but also transformed it into the human ecosystem to a large extent.展开更多
Mercury(Hg)enrichments in ancient sediments have been used as a proxy of volcanism,especially large igneous province(LIP)eruptions.However,considering the existence of other potential Hg sources besides volcanoes and ...Mercury(Hg)enrichments in ancient sediments have been used as a proxy of volcanism,especially large igneous province(LIP)eruptions.However,considering the existence of other potential Hg sources besides volcanoes and the diverse factors(e.g.,organic matters,clay minerals,sulfide minerals and Fe oxides)that can affect Hg sequestration,there are considerable uncertainties to simply regard sedimentary Hg anomalies as signatures of volcanic activities.Mercury stable isotopes,a promising tool for tracing the origins and transformations of Hg,have been increasingly used for determining the causes of Hg spikes and understanding the geochemical behavior of Hg in the geologic record.To date,lots of researches have applied Hg concentrations and Hg isotopes to identify LIP volcanisms linking with significant geological events such as mass extinctions,ocean anoxic events and other environmental perturbations that mainly occurred in the Phanerozoic.However,the results in previous studies clearly show that not all Hg enrichments are derived from volcanic inputs,which emphasize the need for more caution in using Hg as a fingerprint of volcanism.With a better understanding of Hg isotopes in the future,there will be important implications for Hg isotopes to reconstruct volcanic activities in the rock records and their impacts on biological evolution.展开更多
Formal definition of the Triassic-Jurassic boundary at a Global Stratotype Section and Point(GSSP)for the base of the Jurassic System proved to be difficult because of several geological factors.These include a major ...Formal definition of the Triassic-Jurassic boundary at a Global Stratotype Section and Point(GSSP)for the base of the Jurassic System proved to be difficult because of several geological factors.These include a major extinction event,a major global sea-level fall and the palaeogeographical and palaeoecological consequences of widespread tectonic and volcanic events.Historically the position of the boundary has been controversial.In 1984 the International Subcommission on Jurassic Stratigraphy(ISJS)set up a Working Group to investigate and document possible candidate sites and eventually select one to be proposed to ISJS as GSSP.展开更多
文摘Subject Code:C04With the support by the National Natural Science Foundation of China,a collaborative study by Chinese and American biologists led by Prof.Zhang Peng(张鹏)from Sun Yat-Sen University shows that nearly nine out of 10species of frog today have descended from just three lineages that survived the
文摘The co-evolution of climate-environment and ancient vertebrates fossil human are core topics in the theory of biological evolution.At the micro level,we hope to understand the feeding habits of some important groups of organisms in ancient ecosystems,such as dinosaurs,birds,and mammals,as well as their related feeding behaviors,migration patterns,and ecological niches.This requires a comprehensive analysis of key global climate processes during critical periods,the evolution of terrestrial ecosystems,and their relationship with the origin,evolution,and extinction of ancient fossil fauna.Similarly,changes in global climate and ancient monsoon systems have played important roles in the origin,migration,diffusion and behavioral patterns of ancient human being.The domestication of animals and plants and the origin of agriculture are the most representative examples of the co-evolution of human and ecosystem.The early agricultural society not only adapted to most of the area of the terrestrial ecosystem,but also transformed it into the human ecosystem to a large extent.
基金supported by the National Key R&D Program of China(Grant Nos.2023YFC2906601 and 2021YFC2901705)the National Natural Science Foundation of China(Grant No.42173024)+2 种基金the China National Uranium Company-State Key Laboratory of Nuclear Resources and Environment Joint Innovation Fund(Grant No.2022NRE-LH-16)the Jiangxi Double Thousand Plan(Grant No.DHSQT22021005)the Research Foundation of East China University of Technology(Grant No.DHBK2019296)。
文摘Mercury(Hg)enrichments in ancient sediments have been used as a proxy of volcanism,especially large igneous province(LIP)eruptions.However,considering the existence of other potential Hg sources besides volcanoes and the diverse factors(e.g.,organic matters,clay minerals,sulfide minerals and Fe oxides)that can affect Hg sequestration,there are considerable uncertainties to simply regard sedimentary Hg anomalies as signatures of volcanic activities.Mercury stable isotopes,a promising tool for tracing the origins and transformations of Hg,have been increasingly used for determining the causes of Hg spikes and understanding the geochemical behavior of Hg in the geologic record.To date,lots of researches have applied Hg concentrations and Hg isotopes to identify LIP volcanisms linking with significant geological events such as mass extinctions,ocean anoxic events and other environmental perturbations that mainly occurred in the Phanerozoic.However,the results in previous studies clearly show that not all Hg enrichments are derived from volcanic inputs,which emphasize the need for more caution in using Hg as a fingerprint of volcanism.With a better understanding of Hg isotopes in the future,there will be important implications for Hg isotopes to reconstruct volcanic activities in the rock records and their impacts on biological evolution.
文摘Formal definition of the Triassic-Jurassic boundary at a Global Stratotype Section and Point(GSSP)for the base of the Jurassic System proved to be difficult because of several geological factors.These include a major extinction event,a major global sea-level fall and the palaeogeographical and palaeoecological consequences of widespread tectonic and volcanic events.Historically the position of the boundary has been controversial.In 1984 the International Subcommission on Jurassic Stratigraphy(ISJS)set up a Working Group to investigate and document possible candidate sites and eventually select one to be proposed to ISJS as GSSP.
