TABLE 1.

Characteristics of habitats from which the seven genotype 1 strains were isolated

Habitat	Habitat characteristics	No. of sampling sites	Country	Geographic coordinates	Climatic zone	Monthly avg air temp (°C)d		Yearly maximum water temp (°C)
						Minimum	Maximum
Lake Mondseea	Deep submontane lake in prealpine region	1	Austria	47°50′N, 13°22′E	Temperate	−1.6	18.0	22-28
Lake Wolfgangseea	Deep submontane lake in prealpine region	1	Austria	47°46′N, 13°22′E	Temperate	−1.6	18.0	22-26
Pond in Sydneyb	Artificial shallow pond	1	Australia	33°52′S, 151°13′E	Temperate	12.0	22.1	26-31
Lake Taihuc	Large shallow lake	2	People's Republic of China	31°30′N, 120°20′E	Subtropical	2.2	27.8	29-34
Huqiu (Tiger Hill) pond	Small pond, influenced by a spring	1	People's Republic of China	31°20′N, 120°40′E	Subtropical	2.2	27.8	NDe
Pond near Jinja	Shallow natural pond	1	Uganda	0°25′N, 33°12′E	Tropical	20.1	22.4	31f

^aLake Mondsee and Lake Wolfgangsee are located in the Salzkammergut area. The distance between the two sampling sites is 10 km.

^bLocated in the Sydney Royal Botanic Gardens.

^cThe greatest distance between sampling sites in Lake Taihu and the Huqiu pond is ca. 60 km.

^dAt locations in the same area as the habitats sampled (Salzburg, Sydney, Nanjing, Kampala).

^eND, not determined.

^fMaximum temperature measured in another pond in the area of Jinja (data from Asiyo [1]).