CO-tucker: a new method for the simultaneous analysis of a sequence of paired tables

Susana Mendes, M. José Fernández-Gómez, Sónia Cotrim Marques, Miguel Ângelo Pardal, Ulisses Miranda Azeiteiro and M. Purificación Galindo-Villardón

Journal of Applied Statistics, 2017, vol. 44, issue 15, 2729-2755

Abstract: Relationships between species and their environment are a key component to understand ecological communities. Usually, this kind of data are repeated over time or space for communities and their environment, which leads to a sequence of pairs of ecological tables, i.e. multi-way matrices. This work proposes a new method which is a combined approach of STATICO and Tucker3 techniques and deals to the problem of describing not only the stable part of the dynamics of structure–function relationships between communities and their environment (in different locations and/or at different times), but also the interactions and changes associated with the ecosystems’ dynamics. At the same time, emphasis is given to the comparison with the STATICO method on the same (real) data set, where advantages and drawbacks are explored and discussed. Thus, this study produces a general methodological framework and develops a new technique to facilitate the use of these practices by researchers. Furthermore, from this first approach with estuarine environmental data one of the major advantages of modeling ecological data sets with the CO-TUCKER model is the gain in interpretability.

Date: 2017
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DOI: 10.1080/02664763.2016.1261815

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