It wasn’t until the turn of the 21st century that marine biologists started looking past the surface of the ecosystems they studied, finding that parasites and viruses were integral to water ecosystem stability. Before then, they had underestimated both organisms as ‘too fragile’. How big could their contributions possibly be in such a hostile world?
And so the deer and the moose can’t drive the other competitor out because creatures like nematodes can’t hurt one, but will hurt the other (nematodes screw with Bullwinkle’s motor movement by crawling into their spines). I’m talking super opaquely about Mattias Janmark and Ales Hemsky, of course.