Table 1.

Spearman’s rank-based correlation between the total number of grains per plant taxon as determined by microscopy and the number of mate-paired aligned reads per plant taxon as determined by metabarcoding. Numbers indicate Spearman’s ρ, with the P value for each test in parentheses.

Sampling locationa	ITS2	matK	rbcL
A	0.381 (0.360)	0.469 (0.203)	0.587 (0.049)
B	−0.130 (0.658)	0.515 (0.072)	0.764 (0.001)
C	0.238 (0.582)	0.750 (0.066)	0.939 (<0.001)
D	0.204 (0.504)	0.262 (0.536)	0.575 (0.028)
E	0.067 (0.854)	0.483 (0.194)	0.536 (0.073)
F	−0.005 (0.989)	0.617 (0.086)	0.762 (0.002)

^aLetters indicate the apiary associated with each sample.