Spatial Coverage
- Alaska, Southeast6
- British Columbia6
- Minnesota6
- Ontario6
- Hudson River (N.Y. and N.J.)5
- Indiana5
- New Jersey5
- Oregon5
- Texas5
- Alabama4
- Atlantic Coast (South Atlantic States)4
- Atlantic States4
- Mexico, Gulf of4
- Mississippi4
- Mississippi River Valley4
- Siberia, Eastern (Russia)4
- Florida Keys (Fla.)3
- Long Island (N.Y.)3
- Missouri River3
- North Carolina3
