Clade D Symbiodinium in Scleractinian Corals: A “Nugget” of Hope, a Selfish Opportunist, an Ominous Sign, or All of the Above?

Table 1

Distribution and factors associated with relatively high abundances of Symbiodinium clade D in corals.

Location	Host corals	Factors	References
American Samoa	Acropora	High Temperature	[43]
Thailand	Fungia	High temperature (mean, ≈29 -32^∘C)	[33]
	Platygyra	High turbidity (≈0.4 -0.6 mg/m^2 Chl a)
	Symphyllia	Coastal habitat
	Favites
	Goniastrea
	Pavona
	Goniopora
	Montipora
	Oulastrea
	Pocillopora
Barbados	Agaricia	Bleaching	[56]
	Montastraea
Gulf of Chiriqui	Pocillopora	Bleaching	[41]
Kenya	Acropora	Bleaching	[41]
	Astreopora
	Pocillopora
	Stylophora
	Galaxea
	Porites
	Coeloseris
	Pavona
	Hydnophora
	Echinopora
	Favia
	Goniastrea
	Leptoria
	Montastraea
	Platygyra
Keppel Islands	Acropora	Bleaching	[42]
Palau	Hydnophora	High temperature (mean, 28.5-31.8^∘C)	[45]
	Echinophyllia	Lagoonal habitat
	Echinopora
	Favites
	Goniastrea
	Montastrea
	Fungia
	Heliofungia
	Merulina
	Lobophyllia
	Pectinia
	Porites
Boca del Toro	Montastraea	High turbidity (sedimentation)	[55]
		Coastal habitat
Rio Carti	Montastraea	Coastal habitat (sedimentation)	[44]
Persian Gulf	Acropora	High temperature (summer >33°C)	[41]
	Pocillopora	Bleaching (temperature >38°C)
	Goniopora
	Pavona
	Oxypora
	Acanthastrea
	Cyphastrea
	Favites
	Platygyra
	Turbinaria
Iran (Persian Gulf)	Acropora	High temperature (summer, mean: 33^∘C, max: 33^∘C)	[52]
	Cyphastrea	Low temperature (winter, 13.2^∘C)
	Favia
	Turbinaria
	Pavona
	Platygyra
	Porites
	Psammocora