Journal Article 454 sequencing AFLP Ahnfeltiopsis pusilla Bayesian clustering COI-5P DNA, Mitochondrial Ectocarpus ITS1 Research Support, Non-U.S. Gov't Rhodophyta assignment tests barcode brown alga clonality conservation conservation genetics cryptic species expressed sequence tags hybridization introgression isolation by distance management units microsatellite development population connectivity primer design seaweed spatial autocorrelation species delimitation