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Application of functional data analysis to investigate seasonal progression with interannual variability in plankton abundance in the Bay of Fundy, Canada
Title: | Application of functional data analysis to investigate seasonal progression with interannual variability in plankton abundance in the Bay of Fundy, Canada |
Authors: | Ikeda, Takayoshi Browse this author | Dowd, Michael Browse this author | Martin, Jennifer L. Browse this author |
Keywords: | statistical analysis | diatoms | algae blooms | temporal variations | interannual variability | abundance estimation |
Issue Date: | 20-Jun-2008 |
Publisher: | Academic Press |
Journal Title: | Estuarine Coastal and Shelf Science |
Volume: | 78 |
Issue: | 2 |
Start Page: | 445 |
End Page: | 455 |
Publisher DOI: | 10.1016/j.ecss.2007.12.011 |
Abstract: | The statistical technique of functional data analysis (FDA) is applied to a time series analysis of plankton monitoring data. The analysis is focused on revealing patterns in the seasonal cycle to assess interannual. variability of several different taxonomic groups of plankton. Cell concentrations of diatom, dinoflagellate and zooplankton abundances from the Bay of Fundy, Canada provide the observations for analysis. FDA was performed on the log-transformed abundance data as a new approach for treating such types of sparse and noisy data. Differences in the seasonal progression were seen, with peak numbers, timings and abundance levels varying for the three groups as determined by curve registration and higher order derivatives using the objectively fit FDA curves. Nonmetric multidimensional scaling was used to capture seasonal variation among years. These results were further assessed in terms of dominant species and the relationships between groups for different seasons and years. It is anticipated that the easy to use, general and flexible technique of FDA could be applied to a wide variety of marine ecological data that are characterized by missing values and non-Gaussian distributions. |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/34402 |
Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 池田 隆美
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