Region		Environmental Factor*					Reservoir	Transmission	Feed	AIV Emergence
Region		UV-B	Temperature	Salinity	Relative Humidity	Desert Dust	Reservoir	Transmission	Feed	AIV Emergence
Northern Hemisphere	North Pole	+++	− − −	−	−	+++	Guillemot/Great Auk/Razorbill, Penguins, Waterfowl, Algae, Virus, Bacteria, Krill, Squid, Small Fish	Migratory birds	Rice, Wheat, Maize, Water (Wetland, Mud Flat, River, Lake, Pond, Mud, Crab, Mudfish, Catfish, Lungfish)	LPAIV under high UV radiation	HPAIV under low UV radiation
	Europe	+	+	+	+	+
	Asia	+	+	+	+	+++
	North America	+	+	+	+	+
	Africa	+	++	+	+	+++
Equator	-	+	+++	+	++	+
Southern Hemisphere	South Pole	+++	− − −	−	−	+++
	South America	+	++	+	+	+
	Southern South America	++	+	+	+	++
	Southern Africa	++	+	+	+	++
	Australia	++	+	+	+	+++
	New Zealand	++	+	+	+	++