<p>Sensitivity of the <i>Q</i> = 4 reference solution to exclusion of the 27 open cooperative-years.</p>

<p>The <i>Q</i> = 4 model was refitted after excluding the 27 cooperative-years that remained open after source verification (<a href="plosone.org/article/info:doi/10.1371/journal.pone.0358946#pone.0358946.s004" target="_blank">S2 Table</a>; 457 of 484 cooperative-years retained), using the same specification as the full-data analysis. The table reports matched-profile cosine similarities and Spearman rank correlations of normalized component scores relative to the representative full-data solution, together with the dominant taxonomic loadings of the refitted profiles.</p> <p>(XLSX)</p>