About 30 percent of the planet’s available freshwater lies in underground reserves-aquifers. basins, and other sources. Some of the world’s most productive, accessible groundwater supplies are shown here.
Global groundwater
Source: University of California
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Alex E

Ecoclimax is defined by Odum (1969) as the culmination state after a succession in a stabilized ecosystem in which maximum biomass (or high information content) and symbiotic function among organisms is kept per unit of available energy flow.