Perhaps because as the article states, Pando is considered a keystone species, because of that, if Pando ceases to exist, it will take species dependent on it w

Perhaps because as the article states, Pando is considered a keystone species, because of that, if Pando ceases to exist, it will take species dependent on it with it. While as you say other organisms will fluorish, we must consider the change in biodiversity and not just abundance