Before revision: The applications in ecological engineering can be classified into 3 spatial scales: 1) mesocosms (~0.1 to hundreds of meters); 2) ecosystems (~ 1 to 10s of km); and 3) regional systems (> 10s of km).
After revision: The applications in ecological engineering can be classified into 3 spatial scales: 1) mesocosms (~0.1 to hundreds of meters); 2) ecosystems (~ one to tens of km); and 3) regional systems (> tens of km).