○○○dredge⪢⪢
They dredge mud from the pond bottom to seal the dam. Each pond trap several inches of sediment every year. So there's plenty of it.
http://qindex.info/i.php?x=15764
○○○nutrient⪢⪢
In the Rocky Mountains beaver dams slowly filter billions of tons of water. The ponds build up soil and nutients and help prevent floods and droughts.
http://qindex.info/i.php?x=11754
○○○log⪢⪢
The pond makes it easier to move around the heavy logs they need to build the dams. Out of the water it's a struggle.
http://qindex.info/i.php?x=16396
○○○silty⪢⪢
You can get more water from one of 4 sources: a juicy cactus, a pond with salty seawater, a clear still lake or a silty stream.
￫ silt
http://qindex.info/i.php?x=24679
○○○ nutrient ⪢⪢
