FIG. 2. A selective timeline of some major events in freshwater conservation ecology. Items listed above the timeline are
examples of important events that led to the need for conservation action, from Anonymous (1969), Postel (2000), Baldwin et al.
(2007), IUCN (2007), International Commission on Large Dams (2008), and Tennessee Valley Authority (2009). CITES =
Convention on International Trade in Endangered Species, BCE = Before the Common Era.