system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does the underground ecosystem of a cemetery compare to that of a normal, untouched field of grass?

Do all of those caskets and bodies, along with the constant excavation, change the habitat for whichever insects or creatures live inside the ground at cemeteries? Does that type of environment bring new creatures that would not usually be there?
gpt
Most modern graves place the coffin in a sealed vault, so there would be little impact to the environment, beyond having a bunch of concrete in the ground now.

Even with vaults, bodies buried in a cemetery represent a tiny fraction of the ecosystem there and remain biologically active for a very short time.  Having a regularly watered lawn likely has a much greater impact than the bodies do.