I liked Zoo a lot more than Coaster, but what I really want is Safari, so it's more like tending an organic ecosystem.
The breeding mechanic in the latest Jurassic World Evolution allowed you to touch on this a tiny amount, because you could put predator and prey in together and find a sustainable balance, but it still wasn't really built for it.
Some older city builders would lean more in this organic 'gardening' direction rather than strictly 'building', which I always found more engaging.