After the agricultural landscape, ecological degradation has also reached the forest in Europe. How the biodiversity of the forest is to be legally secured is the focus of the 14th German Nature Conservation Law Day. Based on the CBD, the fundamental state objective provision of Art. 20a of the German Constitution (GG) and on EU legal requirements, the paper explores the legislator's scope for preserving and restoring biodiversity. Economic and ethical aspects are included. The focus is on the ecological liability of all owners of natural goods. It becomes apparent that the legislator's escape from concretizing the basic obligations of the owners of natural goods is partly responsible for the current biodiversity crisis, also in the forests. Remedial action is needed.