The rise of humans threw a wrench into the way other land species organized themselves, according to a new statistical analysis covering millions of years of ecosystem evolution.
For at least 300 million years, the rules governing how species grouped themselves in their habitats remained fairly constant, the study found. Species of plants and animals tended to gather together in clumps. Then humans came along.
http://news.yale.edu/2015/12/17/research-news-humans-turned-world-s-ecosystem-structure-upside-down?utm_source=YNemail&utm_medium=email&utm_campaign=ynalumni-12-22-15
