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. 2017 Apr 14;12(4):e0175851. doi: 10.1371/journal.pone.0175851

Table 1. Generalized Additive Mixed Model (GAMM) structures.

α + f Temporal trend and absolute abundances are treatment-independent (Model Trtmt_indep)
α + fT Temporal trends depend on the treatment, but absolute abundances are treatment independent (Model Trtmt_trend)
αT + f Absolute abundances depend on the treatment, temporal trends are treatment independent (Model Trtmt_absAb)
αT + fT Both absolute abundances and temporal trends are affected by the treatment (Model Trtmt_absAb_trend)