Table 3. Compositional variability among samples of the same resin types.

Chemotype	N shared samplesa	N componentsb	Area overlap [%]c	Area overlap [%] per sited	N study sites	Matches with propolise
Ocher	13	49 [20]	1.6	32.1 [9.6]	5	16 [5]
Orange	8	71 [17]	17.3	93.9 [4.6]	3	19 [2]
Red	3	80 [10]	78.8	78.8 [n.a.]f	1	16 [3]
Brown	7	67 [7]	62.9	92.5 [0.1]	4	15 [2]
Clear	2	79 [4]	67.6	n.a.	2	12 [2]
Whitish	1	74	n.a.	n.a.	1	0
Yellow	1	38	n.a.	n.a.	1	6 [1]

^a) Number of samples of this type.

^b) Mean number [± standard deviation] of total components.

^c) Mean proportional area overlap of all compounds shared among all samples of this type.

^d) Proportional area overlap [± standard deviation] of compounds shared by all samples of this type from a specific study site, the number of study sites where this type occurred (N study sites). Area overlap basically corresponds to compound overlap, but weighs more common compounds (large area) more than less common ones (small area).

^e) Number [± standard deviation] of compounds shared with propolis from the same apiary (matches with propolis for two propolis samples per site).

^f) n.a. = overlap was not calculated when there were less than two samples to compare.