Abstract: Chemical ecology of marine organisms is the highlight of chemical ecology in recent years. Its research will not only benefit the evolution research of marine organisms, but also play an important role in marine aquaculture, marine ecological protection, and sustainable development of marine resources. This paper reviewed the research advances in the chemo-ecological relationships between marine animals, plants and microorganisms, with the focus on the discovery of the chemical structure of signal compounds with chemo-ecological effects. The key issues and further directions in related research were discussed.

Key words: Changbai Mountain, Co-occurrence of species, Soil fauna community, Altitude gradient