The surface of the lake freezes in the water, and then thaws in the spring, without a change in the size or shape of the lake. is this process constructive, destructive, both, or neither?

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present