Abstract
Diatoms are widely used to study past and present changes in the marine environment. Unimodal models are appropriate for exploring the relationship between environmental properties in Chinese inshore waters and fossil diatom species derived from modern surface sediments. The best-fit relationships between two multivariate datasets (diatom species and environmental variables) were identified using canonical correspondence analysis (CCA), which is a constrained ordination technique. The absolute abundance of diatoms in the Chinese inshore waters ranged from 500 to 48 000 valves/g, and the average absolute abundance of all the 29 sites was 11 300 valves/g. 153 species and varieties of diatoms belonging to 42 genera in all were identified in the Chinese inshore waters. There were 28 dominant diatom species in all. According to the absolute abundance of the dominant species and the spatial distribution of the currents from the Chinese inshore waters, 12 diatom assemblages were distinguished from north to south, which reflected the different oceanographic conditions at the regional scale. Of the eight environmental variables considered, the most important environmental variable is winter sea surface salinity (WSS), which was also the only environmental variable with statistical significance. Therefore, it may be used to establish a transfer functions for the Chinese inshore waters in future paleoclimate studies.
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Supported by the National Natural Science Foundation of China (No. 41306083), the Special Fund for Basic Work of Science and Technology from the Ministry of Science and Technology of China (No. 2009FY210400), and the Special Fund of the Third Institute of Oceanography, State Oceanic Administration for Basic Scientific Research Operations (No. HSK 2011028)
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Chen, C., Zhao, G., Chen, M. et al. Diatom distribution in surface sediments from Chinese inshore waters and the relationship to modern environmental variables. Chin. J. Ocean. Limnol. 32, 828–844 (2014). https://doi.org/10.1007/s00343-014-3194-3
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DOI: https://doi.org/10.1007/s00343-014-3194-3