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Humans have shaped the Serengeti's ecosystems since the Stone Age

点击量:   时间:2019-03-04 01:12:01

AFRICA’S Serengeti grasslands are far from pristine works of nature. In fact, their rich biodiversity may owe more to cowpats from livestock corralled overnight by nomadic herders millennia ago. Such dung has long been known to provide hotspots of nutrients in otherwise barren grasslands, eventually enabling much richer ecosystems to develop. It was assumed that, on the Serengeti, these spots – called grassy glades – date back roughly 1000 years. Fiona Marshall of Washington University in St Louis, Missouri,