This video documents a dam collapse on our property in Northern Minnesota. The beavers have been building on this dam, adding one and a half feet in height per year for the last 7 years. Needless to say, they reached the limit of 9 feet and it spontaneously collapsed draining the whole pond in about 4 hours. Thankfully no one was near the spillway when it blew.
 
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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.