Rivers & Wetlands

Freshwater Marshes & Floodplains
Saline Systems
Seasonal Flooding Inland Systems
Swamp Forest
Tidal/Costal Systems
Unclassified Wetlands

Major Rivers

The earth's finite supply of 1,260 million, trillion liters of water has been in circulation through the hydrological cycle and the bodies of all living things for some 3.8 billion years. This water comes from a combination of that which was released from the earth's interior during its formative stages and that which landed here via icy asteroids. A fraction continues to rain down upon us from outer space. Only 2% of the world's water is potable, of which 1.6% is ice, 0.36% is subterranean, and a mere 0.036% exists (ephemerally) in lakes and rivers. Seawater covers 71% of the planet.

1. Rivers

Natural Earth, "Rivers + Lake centerlines," http://www.naturalearthdata.com/downloads/10m-physical-vectors/10m-rivers-lake-centerlines/.

2. Wetlands

UNEP-WCMC-Global, "Global Wetlands (1993)," Last updated October 3, 2011, http://www.arcgis.com/home/item.html?id=105a402642e146eaa665315279a322d 1 (accessed August 1, 2015).

3. Hotspots

Critical Ecosystem Partnership Fund, "The Biodiversity Hotspots," http://www.cepf.net/resources/hotspots/pages/default.aspx (accessed July 1, 2014). Data made available under the Creative Commons BY-SA 4.0 License: https://creativecommons.org/licenses/by-sa/4.0/legalcode.