Table 1.

Description of the classification scheme used for the assessment of fit between biophysical and genetic methods. IBO, isolation-by-oceanography; IBD, isolation-by-distance; AEM, asymmetric eigenvector maps.

classification	description	percentage of papers
power of combined approach
IBO	studies with equally or better fit than IBD (e.g. Mantel test, AEM, networks) to predictions from the biophysical model, were classified as IBO	59
IBD	studies with a significant IBD pattern (e.g. using Mantel test), but with poor correspondence with predictions from the biophysical model	19
unclear	for many studies, e.g. where statistical tests were missing (e.g. assessed by eye, networks or genetic models), it was not possible to make a clear assessment, and those studies were classified as unclear	22