The amount of living matter present in an ecosystem at a given time is called

The correct sequence of plants in a hydrosere is

The global water cycle involves:

Another name for nutrient cycling is

Identify the largest ecosystem based on size.

Sometimes,due to biotic or abiotic factors,the climax community remains in a particular seral stage (pre-climax) without reaching the final climax. Do you agree with this statement? If yes,provide a suitable example.