Table 2.

Conditions necessary to declare local adaptation (LA), general adaptation (GA), or local maladaptation (as defined here) and their frequencies in one-on-one comparisons of populations A and B (local versus nonlocal) at sites A and B in two meta-analysis studies. Population A originates at site A, and population B originates at site B. Note that GA may occur in either of two ways (population A is generally superior across sites A and B, or population B is generally superior across sites A and B). The terminology and associated conditions employed here differ from the terminologies and conditions of both meta-analysis papers, which also differ from one another (see footnotes)

	Superior population
	At site A	At site B	Leimu and Fischer (2008)	Hereford (2009)
LA*	A	B	45%	48%
GA†	A	A	51%	43%
GA	B	B
Local maladaptation‡	B	A	3%	9%
Number of one-on-one comparisons (n)			1032	892
Local superior to nonlocal			71%	71%

^*Referred to as ‘POS-POS’ by Leimu and Fischer (2008) or ‘fitness trade-off’ by Hereford (2009).

^†Referred to as ‘NEG-POS’ or ‘POS-NEG’ by Leimu and Fischer (2008) or ‘no trade-off’ by Hereford (2009).

^‡Referred to as ‘maladaptation’ or ‘NEG-NEG’ by Leimu and Fischer (2008) or ‘inverse trade-off’ by Hereford (2009).