system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How badly am I disrupting my lawns' ecosystem every time I mow?

Considering the multiple insect colonies residing in the lawn, I can imagine the mass murder of these little buggers might cause somewhat of a shift of trends in the local ecosystem, also the micro ecosystem (ph, nutrient supply, possible gas spillage into the soil).

**Edit:** Thanks for all of the great responses, Reddit! Much insight and wisdom, as always.
gpt
I expect it stays fairly constant because lawns are mowed fairly frequently, so insects and such that need long grass won't live there and most that do are scared off by the mower rather than killed by it. If you leave the lawn for several months, you will cause much more disruption.