Ecoregions and Biomes of North America and the World
NORTH AMERICAN ECOREGIONS AND WATERSHEDS
Commission for Environmental Cooperation: Ecological Regions of North America (60 page pdf)
EPA Ecoregion maps and descriptions (maps and descriptions at different levels)
>> Ecoregions of Wisconsin
>> Great Lakes Atlas and Resource Book
US Forest Service (Bailey) Ecoregions Center
>> Descriptions of Bailey’s ecoregions
>> Descriptions of the Sections as depicted on the map "Ecoregions and Subregions of the United States." National Hierarchical Framework of Ecological Units (ECOMAP 1993), devised by Bailey.
>> Descriptions of the Sections as depicted on the map "Ecoregions and Subregions of the United States”
Watersheds of North America (Bioregional Congress)
Watersheds of the United States (USGS)
WORLD ECOREGIONS
National Geographic / World Wildlife Fund Global 200
>> Wikipedia listing
>> Ecoregions in North America
Miklos Udvardy & World Wildlife Fund: ecozones (8):
Sierra Club: Ecoregions (21)
Taktajan: Floristic Provinces
World Watersheds
WRI Earthtrends: Watersheds of the World
BIOMES
Animal planet biomes
H. J. De Blij World Biomes
NASA Earth Observatory
>> coniferous forests
>> temperate deciduous forests
>> deserts
>> grasslands
>> rainforests
>> shrublands,
>> tundras.
NRCS Biome Map
U.C. Berkeley World’s Biomes Page
World Wildlife Fund Biomes by latitude and humidity (The 14 terrestrial biomes are further divided into 825 ecoregions)
>> Terrestrial biomes: Tundra; taiga or boreal forest; Temperate broadleaf and mixed forests, Temperate coniferous forests; subtropical moist broadleaf forest; Subtropical dry broadleaf forests, Subtropical coniferous forests; Mediterranean forests, woodlands, and shrub, Temperate grasslands, savannas, and shrublands; Temperate deserts and xeric shrublands; Tropical forest or Rainforest; Tropical Grasslands -- Tropical Savannas; Desert
>> Aquatic biomes : continental shelf; littoral; riparian; pond; lake; coral reef; pack ice; hydrothermal vents; cold seeps; benthic zone; pelagic zone
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