Well, of course an ecosystem as it exists in a given moment in time relies on a "delicate balance". But the fact is that all ecosystems change. Migration, and p

Well, of course an ecosystem as it exists in a given moment in time relies on a "delicate balance". But the fact is that all ecosystems change. Migration, and population change are the norm, stasis is the exception. It requires contextualization to define a particular change as "harmful" or "beneficial". In reality ecosystems will adapt, as they've done for millions upon millions of years. Perhaps we humans will find that the new, adapted ecosystem is less to our liking in some way but it will still generally be viable.