Table 1. Species identification and geographic origin of the seventeen Gambierdiscus strains used in growth rate experiments.

Species	Strain	Collection date	Origin
G. belizeanus	BP Mar10_6	Mar, 2010	St. Thomas, USVI
G. belizeanus	BP Mar10_7	Mar, 2010	St. Thomas, USVI
G. belizeanus	BP Mar10_22	Mar, 2010	St. Thomas, USVI
G. belizeanus	FC Dec10_13	Dec, 2010	St. Thomas, USVI
G. caribaeus	BP Aug08	Aug, 2008	St. Thomas, USVI
G. caribaeus	FC Nov09_4	Nov, 2009	St. Thomas, USVI
G. caribaeus	SH Nov09_3	Nov, 2009	St. Thomas, USVI
G. carolinianus	SH Mar10_12	Mar, 2010	St. Thomas, USVI
G. carolinianus	BB Apr10_3	Apr, 2010	St. Thomas, USVI
G. carolinianus	BP May10_1	May, 2010	St. Thomas, USVI
G. carpenteri	KML1	Mar, 2011	Long Key, Florida Keys
G. pacificus	3S0509-27	May, 2011	Marakei Island, Kiribati
G. pacificus	3S0510-19	May, 2011	Marakei Island, Kiribati
G. silvae	FC May10_9	May, 2010	St. Thomas, USVI
Gambierdiscus sp. type 4	1D0509-16	May, 2011	Marakei Island, Kiribati
Gambierdiscus sp. type 4	1D0510-22	May, 2011	Marakei Island, Kiribati
Gambierdiscus sp. type 5	DS0511-03	May, 2011	Marakei Island, Kiribati

USVI: United States Virgin Islands