Total sensitivity indices.

As an index approached 0, the functional became essentially independent of that parameter. A large index value indicated that the considered parameter contributed to significant nonlinear interactions with other model parameters, so that ignoring it would amount to that index’s loss, as a proportion, of the total variance. Some parameters that were negligible, e.g. mcyc, may have been so because their prescribed uncertainties were smaller than other parameters. Confidence intervals are given in S1 Appendix.