Which of the following is an artificial ecosystem?

Select the incorrect statement from the following.

When a man eats a fish which feeds on zooplanktons which have eaten small plants,the producer in this chain is:

The largest ecosystem of the world is:

If a $succession$ occurs in a $hydric$ (aquatic) area,the final climax community will be .....

The total quantity of global carbon is distributed such that $1\%$ is carbon in the atmosphere and $71\%$ is carbon dissolved in the oceans.