1 JUSTIFICATION

The original results to Reddin, Kocsis, and Kiessling (2018) included an error in the code that intended to match geographical grid cells between neighbouring ages (“matched‐cells” hereafter), via a nonsensical call to the subset() function. After correcting this coding mistake, we checked these results against those acquired with the matched‐cells step omitted entirely. The results held only when the matched‐cells step was omitted. This invalidated our original belief that matched‐cells would help “homogenize geographical sampling coverage between consecutive ages”. The restriction to matched‐cells results in a median loss of 23% of survivor species compared to without matched‐cells (median = 118 survivor species per age to median = 153 without matched‐cells). Additionally, we suspect that the two spatial corrections for sampling variation interfere with one another, that is, the use of (a) matched‐cells and (b) subtraction of the sampling focus from the median genus range centre (to calculate the latitudinal deviation). We therefore reproduce the analyses without limiting data to matched‐cells and present the updated results, including the five changed results figures, here.

In summary, the changes to the results are minor and the scientific conclusions remain as originally stated.

中文翻译：

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海洋无脊椎动物迁徙追踪了4.5亿多年的气候变化

1辩护

Reddin，Kocsis和Kiessling（2018）的原始结果中包含一个错误，该错误旨在通过对subset（）的无意义调用来匹配相邻年龄之间的地理网格单元（以下称为“ matched-cells” ）。功能。纠正此编码错误后，我们对照完全省略了匹配单元的步骤检查了这些结果。仅当省略匹配单元格步骤时，结果才会保留。这使我们原本认为匹配单元格将有助于“使连续年龄之间的地理采样范围均匀化”的信念无效。与没有匹配细胞的情况相比，对匹配细胞的限制导致存活物种的中位数损失为23％（中位数=每年龄118个存活物种，而没有匹配细胞的中位数= 153）。此外，我们怀疑对采样变化的两个空间校正会相互干扰，即使用（a）匹配单元格和（b）从中属属范围中心减去采样焦点（以计算纬度偏差） ）。

总而言之，结果的变化很小，科学结论仍然如最初所述。