Spatial-temporal distribution and diversity of the Ediacaran-Cambrian macroalgae: insights from fossil records of South China
LI Gaorong1, WEI Fan1,2, CONG Peiyun1,2
1 Institute of Palaeontology,Yunnan Key Laboratory for Palaeobiology,MEC International Joint Laboratory for Paleobiology and Paleoenvironment,Yunnan University,Kunming 650500, China; 2 State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing 210008,China
Abstract：Numerous Ediacaran-Cambrian Lagerstätten in South China provide important fossil evidence for the understanding of early evolution of life and ecosystems. Macroalgae were abundant,widely distributed,diverse in morphology,and constituted an essential part of ecosystems during the Ediacaran-Cambrian. Previous investigations on the Ediacaran-Cambrian macroalgae in South China focused on morphology,classification and palaeoecology,while their geographical distribution and diversity changes have seldom been studied in detail. In this paper,we summarize the Ediacaran-Cambrian macroalgae from the Ediacaran-Cambrian Lagerstätten of South China. The palaeogeographic distribution and genus/species diversity of macroalgae increased significantly from early to late Ediacaran,and reached the peak in the Age 5. The palaeogeographic distribution and genus/species diversity were extremely low during the Terreneuvian(Cambrian),and increased during the Epoch 2. Thereafter,the palaeogeographic range of macroalgae decreased in the Miaolingian-Furongian,and the genus/species diversity increased significantly and reached the second peak. The increase of regional marine oxygen level,which is suggested to be closely related with the availability of nutrient elements such as N and P,may be the main reason for the flourishing of macroalgae(high genus and species diversity),and the wide distribution of mud shale suitable for the fossilization of soft-bodied organisms might be an important factor controlling the geographic extension of the Ediacaran-Cambrian macroalgae in South China.
LI Gaorong,WEI Fan,CONG Peiyun. Spatial-temporal distribution and diversity of the Ediacaran-Cambrian macroalgae: insights from fossil records of South China[J]. JOPC, 2023, 25(2): 451-470.
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