Ecology involves learning the multiple processes that occur in an ecosystem in a non-linear manner. For students to understand the complexity of an ecosystem and the processes, an interdisciplinary teaching and learning strategy is essential. Crossing the four disciplines that constitute STEM education, characterizes STEM education as an interdisciplinary approach. This study prescribes Facebook incorporated STEM education to conduct the lessons on a dynamic ecosystem, and the effects are reported. Mixed method research encompassing experimental research and qualitative interviews conducted with From Four students (equivalent to grade 9) revealed that the new strategy, Facebook incorporated STEM education fostered students understanding of ecosystems. The paired sample t-test analysis indicated significant differences between the pre and post understanding scores. The qualitative interview analysis informed how Facebook incorporated STEM education resulted in students acquiring better understandings. The study entails an interdisciplinary strategy is essential for effective teaching of a complex process such as the ecosystem.