"传播媒介生态学" can be translated into English as "Ecology of Communication Media" or "Media Ecology" (though "Media Ecology" has a broader and more established usage in the field of communication studies, referring to the study of media environments and their effects on individuals and society, it can also encompass the ecological perspective of communication media).
If you specifically want to emphasize the ecological study of communication media as a distinct field, "Ecology of Communication Media" might be a more precise and descriptive translation. However, in academic and professional contexts, "Media Ecology" is widely recognized and used to discuss this area of study.