| In recent years, peatlands paleohydrology becomes an important parameter to study paleoenvironment information change. The research of peatlands paleohydrological quantitative reconstruction bsaed on testate amoebae becomes a hotspot, Daxing’an Moutains is the main distribution area of oligotrophic peatlands in China, it sensitives to environment information change and is suitable for the study of water-level change. In ombrotrophic peatlands, surface wetness reflects hydroclimate, so testate amoebae can play an important role in reconstruction of climate change.Based on the existing basis of research, we applied in testate amoebae-water transfer function, Northeast of China for quantitative reconstruction of the water-level of LGH, MG,PG three peatland profiles of Daxing’an Moutains, the reconstruction results and meteorological data through the analysis of correlation, to verify the applicability of testate biological indicator.The 238 samples, 48 species taxa, and 59 204 tests are analyzed and identified. Assulina muscorum, Assulina seminulum, Trigonopyxis arcula, Nebela militaris, Archerella flavum,Hyalosphenia papilio, Difflugia lucida, Hyalosphenia elegans, Euglypha compressa were appeared regularly. Archerella flavum, Placocista spinosa, Placocista glabra which appeared in this paper has never been reported before. We did a profile diagram for each peatland profiles of testate amoebae, and applied transfer function for quantitative reconstruction of peatland profiles paleohydrology. The results show that the direction of the reconstructions is consistent in terms of wet/dry shifts. Significant test results show that the reconstruction of paleohydrology is significant correlation, p<0.05. We using Coniss constrained clustering partition section of stage of change. We compared oligotrophic peatlands paleohydrology with the water-level history of Daxing’an Moutains, the results show that the summer temperature is likely to be a major climatic driving factor. |
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