Question

beavers built a dam in a river causing an area to flood. the trees rotted and died and fell into the water. the trees in the water created a bog mat, then someother type of grass things fell to the bottom of the river which caused moss and in the end the trees grew back drying up the river so would this be a primary succession or a secondary succession and why? this has got me so confused hope you can help or at least lead me in the right direction. thanks

Answer 1

It looks like it should be secondary successin -- but study this site carefully to understand the process.

http://www.marietta.edu/~biol/biomes/succession.htm