Region
Adriatic Sea
1
Africa
22
Africa, Central
1
Africa, East
1
Africa, Southern
2
Africa, Sub-Saharan
12
Africa, West
2
Alaska
3
Alberta
1
Alsea River Watershed
1
Amazon River Region
4
Amazon River Watershed
1
America
1
Andaman and Nicobar Islands
1
Antarctica
5
Aral Sea (Uzbekistan and Kazakhstan)
1
Argentina
3
Asia
18
Asia, Central
2
Atlantic Ocean
1
Australia
11
Australia, Northern
1
Balkan Peninsula
3
Balochistān
1
Baltic Sea
1
Baltic Sea Region
1
Bangladesh
6
Bengal Basin
1
Bialowieza Forest (Poland and Belarus)
1
Biscay, Bay of (France and Spain)
1
Bosnia and Herzegovina
1
Brazil
8
British Columbia
1
Bulgaria
1
California
4
Canada
5
Caribbean Area
2
Central America
2
Cheju Island
1
Chile
3
China
15
China, Northwest
1
Cold regions
1
Colorado
1
Columbia River Watershed
1
Croatia
1
Developing countries
13
East (U.S.)
3
Ecuador
1
Egypt
11
more ...