Some info:
1) Complexity science is the study of complex systems.
2) It is a newly emerging field.
3) Most researchers in this field come from other disciplines, like economics, ecology, physics, and public policy.
4) A few researchers or labs in the environmental field would state "complex system" in their profile or "research interest", but not many.
5) In most universities, schools, labs, or research institutes, complexity science is not the main research area.
6) A student who wants to study complex systems might hard to find a Ph.D. advisor who can guide him/her on this.
I admit that this question is more like a personal question than a technical question......
But I just wonder "will someone, some clever guy in Research Gate know it......?"
I will try to answer this question, and post some of my findings.
Hope that someone who has the same question might find this.