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Reply to Sklenář: Upward vegetation shifts on Chimborazo are robust

Working with 210-y-old botanical data is challenging. The same data quality concerns expressed by Sklenař (1) motivated the extensive sensitivity analyses reported in our study (2), all of which indicate robust results, shown in our Supporting Information. Although some uncertainty is unavoidable, the strength of our study lies in the broad range of evidence supporting a strong overall upward vegetation shift on Chimborazo since Humboldt’s 1802 visit, consistent for the upper vegetation limit, vegetation zones, species, genera, and glacier retreats.