Table 2. Absolute and relative link counts from OTT, WD, and GloBI compared to WoRMS, GBIF, Index Fungorum (IF), and NCBI.

	WoRMS	GBIF	IF	NCBI	Combined
OTT	327,929 (100%)*	2,451,566 (100%)	276,262 (100%)	1,355,207 (100%)	4,410,964 (100%)
WD	288,110 (88%)	1,779,789 (73%)	76,497 (28%)	410,092 (30%)	2,554,488 (58%)
GloBI	68,565 (21%)	315,173 (13%)	33,400 (12%)	704,361 (52%)	1,121,499 (25%)

Notes.

^*Overlap between each resource and OTT is set at 100%. The other percentages give a relative estimate of size and scale and should not be interpreted as overlapping IDs.