This article is helpful, I think it's "gay sex" bc it's the MSM community that cruises in that particular forest. Verse other locations for dogging, which isn't a queer culture thing, it's a voyeuristic & exhibitionist activity
https://www.the-fence.com/the-fuck-tree/
But yeah. Just a good tree to fuck on, however the orgy at midnight is very well attended by MSM
Tldr: they get everywhere and the population grows super fast, smaller bodies of water may have issues with the boom before the population reaches equilibrium. Not an expert, just from Ohio, Lake Erie anecdote below. And I don't know if they displaced anything else to occupy this novel niche.
Zebra Mussels got into Lake Erie bunch a years ago and the population exploded so fast people were worried the colonies would block stuff, whole waterways by some estimates. But it turned out they were living off something in the water "that made the water cloudy and brown", idk pollutants or an algae thing? So after a few years there was less of that food source and the Zebra Mussel population found an equilibrium. There were issues, something about getting them off boats, so people were at work to protect infrastructure. Now Lake Erie is clearer and they just found those 40 circles on the bottom, there were some great headlines a week or two back, but they're just sinkholes, not alien structures, whomp whomp