*variance*and

*variation*, Legendre & Legendre (2012) note: “The term variation, a less technical and looser term than variance, is used because one is partitioning the total sum of squared deviations of y from its mean (total SS). In variation partitioning, there is no need to divide the total SS of y by its degrees of freedom to obtain the variance s

^{2}

_{y}.” The first edition of the book

*Multivariate Analysis of Ecological Data using CANOCO*(Lepš & Šmilauer 2003) was using the term

*variance partitioning*, while in the second edition (Šmilauer & Lepš 2014), authors adopted the term

*variation partitioning*, noting: “It was called

**variance**partitioning in the original paper, but we prefer, together with Legendre & Legendre 2012, the more appropriate name referring to

*variation*, as we also include unimodal ordination methods in our considerations.”