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. 2016 Jun 12;6(14):4654–4669. doi: 10.1002/ece3.2225

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Published 2016. This article is a U.S. Government work and is in the public domain in the USA. Ecology and Evolution published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Coverage indices for each of eleven temporal, spatial, or environmental gradients (twelve taxonomic survey datasets pooled) averaged across (A) GBIF, (B) standardized (i.e., BBS and FFS), (C) terrestrial, and (D) aquatic datasets. Index values are D‐statistics from Kolmogorov–Smirnov goodness‐of‐fit, indicating strong or weak (low or high D‐statistics, respectively) congruence between survey datasets and the background environment. Vertical gray and red lines represent the mean of all eleven datasets for all surveyed grid cells and well‐surveyed grid cells, respectively.