Figure 1. Distribution map for all sampling sites (magenta circles) in the region of the northwestern Pacific.

The countries surrounding the study area: Greater China, Japan, and Korea. The location details and a list of the number of samples collected per site are available in the Supplementary Table S1. Both the map of World and the map of northwestern Pacific with Greater China, Japan, and Korea were rendered with ODV v4.7.3⁶³ (available at http://odv.awi.de) and modified in Microsoft Office.