Region
Africa
14
Africa, East
1
Alabama
3
Alaska
6
America
1
American Samoa
3
Apalachicola National Forest
1
Appalachian Region, Southern
1
Arizona
5
Arkansas
2
Asia
3
Atlantic Ocean
1
Australia
14
Back Bay National Wildlife Refuge (Va.)
1
Bakersfield Region
1
Bale Mountains (Ethiopia)
1
Brazil, Southeast
2
British Columbia
1
Cabo de Hornos Biosphere
1
Cabo de Hornos Biosphere Reserve
2
Cabo de Hornos Biosphere Reserve (Chile)
2
California
23
California, Gulf of
2
California, Gulf of (Mexico)
1
California, Southern
1
Canada
2
Cape Cod Bay (Mass.)
1
Central Valley
2
Channel Islands National Park
1
Channel Islands National Park (Calif.)
1
Chesapeake Bay (Md. and Va.)
2
Chesapeake and Ohio Canal National Historical Park
2
Chile
2
China
2
Chine
1
Chukchi Sea
2
Coachella Valley
1
Coachella Valley (Calif.)
1
Colombia
1
Colorado
1
Colorado River Watershed (Colo.-Mexico)
4
Columbia River
4
Columbia River Watershed
6
Conecuh National Forest
1
Conecuh National Forest (Ala.)
1
Cook Inlet
2
Cumberland County
1
Delta Region
1
Denmark
1
Edwards Aquifer (Tex.)
1
more ...