And it lowers the population,
Think of life forms on earth as a gradually decreasing battle royale (not like fortnite)
But the 3 kingdoms fight for dominance first: animal , plant and fungi.
Then it goes to subspecies: (animal wins round one); microbes;(protozoa , virus, etc.) mammal;(primate, echidnae, etc.) AND ETC. AGAIN CAUSE TOO MANY!
then the common groups like toads vs lizards or butterflies vs grasshoppers
Then it's SPECIES. And the SPECIFIC SPECIES THAT WINS IS DOMINANT AND WINS.
And humans are falling behind slowly