Fig 1.
Map of study area and sampling locations.
The inset map shows the relative positions of the Florida Keys, Tampa Bay, the Bahamas and Bermuda. The main map shows the positions of the Florida Keys sampling locations. Site numbers are displayed to minimize text in the figure (corresponding site names are available in Table 1). Sampling methodology is represented by shape in both the main and inset maps (sampling area of ~ 2,500 m2: circle; sampling area of ~ 500 m2: square; Florida Bay and Bermuda–composite sampling areas of ~ 70 m2: triangle).
Table 1.
Summary genetic statistics for all populations.
Fig 2.
Diagrams of STRUCTURE cluster assignment.
(A) K = 2 cluster assignment and (B) K = 4 cluster assignment. Population names are on the x-axis, separated by black vertical bands. Individual genotypes are represented as vertical bars and cluster assignment is depicted by color.
Fig 3.
Diagram of relative magnitude and direction of gene flow.
Nodes represent populations (refer to Table 1 to match numeric codes with location names). Arrows are weighted according to Alcala's Nm values (S3 Table), which range from 0.004 to 1.000, and arrowheads show the estimated direction of gene flow.