Characteristics of Paleontological Communities in Surface Sediments of the Southern South China Sea and Their Paleoclimatic and Paleoenvironmental Significance

IF 4.1 2区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Journal of Earth Science Pub Date : 2024-02-14 DOI:10.1007/s12583-023-1910-5
Jing Zhao, Li Zhang, Xiaoyan Wang, Jinglian Ge, Min Xu, Wei Chen, Mao Luo, Qianyong Liang, Qiuhua Yu, Shuaibing Luo, Wenkun Qie
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Abstract

Understanding the spatial and temporal distribution of different paleontological communities in the southern South China Sea (SCS) is fundamental to explore its paleoclimatic and paleoenvironmental changes. In this study, foraminifera, pollen and diatoms from 100 surface sediment samples covering 40 000 km2 of sea floor in the southern SCS were comprehensively investigated in terms of their assemblage and distribution. The results showed the existence of abundant foraminifera and pollen in most of the samples, although diatom communities were relatively scarce. Foraminifera were dominated by G. sacculifer, G. menardii, G. ruber, while diatoms were characterized by T. simonsenii, T. nitzschioides and T. longissima, indicating a typical tropical marine environment. The pollen assemblages showed a better reflection of montane rainforest, tropical rainforest and mangrove. The spatial differences among foraminifera assemblages may indicate the effect of water depth and a warmer environment in the southeast part of the study area, while the spatial patterns of diatom and pollen assemblages imply the influence of coastal current. Our study also noted that the compositions of paleontological communities in the SCS can vary significantly in a short distance, and synthesized studies on multiple biological groups are needed to reconstruct the Quaternary climate and the oceanographic environment.

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中国南海南部表层沉积物中的古生物群落特征及其古气候和古环境意义
了解中国南海南部不同古生物群落的时空分布是探索其古气候和古环境变化的基础。本研究对南海南部 4 万平方公里海底的 100 个表层沉积物样品中的有孔虫、花粉和硅藻进行了全面的组合和分布研究。结果表明,大多数样本中存在丰富的有孔虫和花粉,但硅藻群落相对较少。有孔虫主要是 G. sacculifer、G. menardii 和 G. ruber,硅藻主要是 T. simonsenii、T. nitzschioides 和 T. longissima,表明这是一个典型的热带海洋环境。花粉组合较好地反映了山地雨林、热带雨林和红树林的情况。有孔虫组合的空间差异可能表明了水深和研究区东南部较温暖环境的影响,而硅藻和花粉组合的空间模式则暗示了沿岸流的影响。我们的研究还指出,南中国海古生物群落的组成在短距离内会有很大差异,需要对多种生物群落进行综合研究,以重建第四纪气候和海洋环境。
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来源期刊
Journal of Earth Science
Journal of Earth Science 地学-地球科学综合
CiteScore
5.50
自引率
12.10%
发文量
128
审稿时长
4.5 months
期刊介绍: Journal of Earth Science (previously known as Journal of China University of Geosciences), issued bimonthly through China University of Geosciences, covers all branches of geology and related technology in the exploration and utilization of earth resources. Founded in 1990 as the Journal of China University of Geosciences, this publication is expanding its breadth of coverage to an international scope. Coverage includes such topics as geology, petrology, mineralogy, ore deposit geology, tectonics, paleontology, stratigraphy, sedimentology, geochemistry, geophysics and environmental sciences. Articles published in recent issues include Tectonics in the Northwestern West Philippine Basin; Creep Damage Characteristics of Soft Rock under Disturbance Loads; Simplicial Indicator Kriging; Tephra Discovered in High Resolution Peat Sediment and Its Indication to Climatic Event. The journal offers discussion of new theories, methods and discoveries; reports on recent achievements in the geosciences; and timely reviews of selected subjects.
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