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Wang et al. reply

Author

Listed:
  • Rong Wang

    (Palaeoecological Laboratory, Geography and Environment, University of Southampton, Southampton SO17 1BJ, UK
    State Key Laboratory of Lake Science & Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences)

  • John A. Dearing

    (Palaeoecological Laboratory, Geography and Environment, University of Southampton, Southampton SO17 1BJ, UK)

  • Peter G. Langdon

    (Palaeoecological Laboratory, Geography and Environment, University of Southampton, Southampton SO17 1BJ, UK)

  • Enlou Zhang

    (State Key Laboratory of Lake Science & Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences)

  • Xiangdong Yang

    (State Key Laboratory of Lake Science & Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences)

  • Vasilis Dakos

    (Wageningen University, PO Box 47, NL-6700 AA, Wageningen, The Netherlands
    Integrative Ecology Group, Estación Biológica de Doñana, CSIC, C/Américo Vespucio S/N, E-41092 Seville, Spain)

  • Marten Scheffer

    (Wageningen University, PO Box 47, NL-6700 AA, Wageningen, The Netherlands)

Abstract

REPLYING TO J. Carstensen, R. J. Telford & H. J. B. Birks Nature 498, 10.1038/nature12272 (2013) Some issues have been raised with regard to our paper1, by Carstensen et al.2. In terms of our data processing, we were aware from the outset of the problems of unevenly spaced temporal data and sediment dating errors. We also wanted to duplicate, as far as possible, the methods published previously that had been used to identify early warning signals in palaeoenvironmental data (for example, ref. 3). Thus, we applied two standard smoothing functions (exponential and Gaussian kernel) to interpolated and non-interpolated (original) diatom data, expressed as three statistical indices (detrended correspondence analysis (DCA), Hill’s diversity index N2 (HDI) and correspondence analysis), using different sliding-window sizes and the two-standard-deviation range of dates for each sample.

Suggested Citation

  • Rong Wang & John A. Dearing & Peter G. Langdon & Enlou Zhang & Xiangdong Yang & Vasilis Dakos & Marten Scheffer, 2013. "Wang et al. reply," Nature, Nature, vol. 498(7455), pages 12-13, June.
    • Handle: RePEc:nat:nature:v:498:y:2013:i:7455:d:10.1038_nature12273
    DOI: 10.1038/nature12273
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