[2021] Extinction and ecosystems

Hello all,

I'm new to Eco, but I have been following the development for a while. This may be an odd question, but I am playing on a solo world and I want to test out how the ecosystem works. I want to try to cause an extinction on this throw away world and play with population dynamics, but so far as a single player I have been unable to affect any significant change in populations, like an extinction. I started with Jaguars in the wetland ecosystem and I have tried hunting them, hunting them and the snapping turtles since thats their prey, and I have tried converting large amounts of the biome to farmland with a hoe, but only minor changes in population. So my question is, what is the best way to cause an extinction besides chopping down all the old growth redwoods?