With megafauna mostly gone, so are their giant turds. Which has a huge effect on ecosystems. 'We estimate that the decimation of terrestrial megafauna and whales has reduced the ability of animals to distribute nutrients away from regions of nutrient abundance to ∼6% of global natural capacity. ' User Searth, in the Post info about megafauna from any time period subreddit, 05 Nov 2015