Ecological risk analysis (ERA) is a method used to analyze and describe the environmental impacts of a project, program, or policy with the aim of parameterizing the cause-effects chain in a structured but overall simplistic way. In most applications, ERA is directly combined with environmental risk assessment (ERAS). In ERAS, the social dimension about the ecological value of the system parameters or indicators is added to the analysis in terms such as good, bad, action needed, low, high, and so on. The basis of the analysis is the best but incomplete and uncertain environmental information. The problem of missing knowledge and local information about the interactions in ecological systems and the different timescales of environmental systems must be solved by qualitative approximations and knowledge. ERA ...