In this contribution we try to project some concepts of the complexity theory to landscape ecological research, especially into the design of ecological networks. At first, we utilize exergy dissipation concept to justify our model of an ecologically integrated landscape and to analyse the concept of ecological stability. We outline basic principles of the new method of the ecological balance evaluation and point to the exergy relation to spatial ecological balance and connectivity. Connectivity is already expressed in the concept of ecological networks (EN) or territorial systems of ecological stability (TSES). Search for a dynamic ecological balance based on effective exergy dissipation and for an optimal connectivity (not a maximal one) should be recognized as an important design criteria for ENs and TSESs. Apart from the exergy approach the design of EN and TSES can be improved also by means of the landscape metrics (esp. connectivity indexes).