Table 2.

Lethal limits for H₂O₂exposure in various organisms.

	Species	Type of assay	Effective dosage	Reference
Cnidarians	Nematostella sp.	14-d 100% mortality	163 μM	[216]
Crustaceans	Mysis sp.	1-h LC50	29 mM	[265]
	Calanus finmarchicus	1-h LC50	180 μM	[266]
	Calanus spp. Stage V larvae	1-h LC50	6.3 mM	[227]
	Calanus spp. Stage V larvae	25-h LC50	2.3 mM	[227]
	Calanus spp. Adult	1-h LC50	1.4 mM	[227]
	Calanus spp. Adult	25-h LC50	900 μM	[227]
	Crangon septemspinosa	1-h LC50	94 mM	[265]
	Atemia salina	24-h LC50	24 mM	[267]
	Crophium volutator	96-h LC50	1.4 mM	[268]
	Homarus americanus, stage I larva	1-h LC50	48 mM	[265]
	Homarus gammarus, larvae stages I-IV	1-h LC50	5.2–22 mM	[226]
Molluscs	Dreissena polymorpha	72-h LC50	890 μM	[55]
Fish	Siganus fuscescens	24-h LC50	6.6 mM	[269]
	Trachurus japonicus	24-h LC50	2.6 mM	[269]
	Oncorhynchus mykiss juveniles	3-h 90% mortality	∼9 μMa	[270]
Phytoplankton	Microcystis aeruginosa	3-h LC50	7.9–195 μM	[207]
	Selenastrum capricornutum	3-h LC50	119–625.3 μM	[207]
	Raphidocelis subcapitata	3-h LC50	359–2088 μM	[207]
	Prochlorococcus	24-h 100% mortality	800 nM	[200]
Zooplankton	Daphnia sp.	48-h LC50	164 μM	[271]
	Moina sp	48-h LC50	58.8 μM	[271]
Bacteria	Escherichia coli	3 h-LC50	7.8 mM	[272]
	Escherichia coli	6 h 100% mortality	15 mM	[182]
	Vibrio coralliilyticus	0.5 h- LC50	∼15 μM	[67]

^aMeasured in the presence of harmful alga Heterosigma carterae; algal toxins likely enhanced ROS lethality.