In 2021, a study using ancient environmental DNA concluded that the extinction of the mammoth was primarily caused by dramatic vegetation changes at the end of the Last Glacial Maximum, due to a changed climate and precipitation regime. During the Last Glacial Maximum, the Arctic would have had a homogeneous flora consisting of mammoth steppe-associated plants, supporting a unique community of grazing mammals, including the mammoth. Increased precipitation following the end of the LGM caused a significant paludification of the steppe, which has been linked to a general decrease in species diversity of the region's former inhabitants, and not just mammoths. In addition, the study found mammoths to have persisted on the mainland for far longer than previously thought, with their shrinking distribution roughly tracking the shrinkage of the mammoth steppe; their final mainland refugium, the Taymyr Peninsula, was roughly concurrent with the Wrangel population. The close relationship between decreasing mammoth populations and steppe, as well as the lack of a sudden decline that would be associated with the human overkill hypothesis, indicates that humans and mammoths may have coexisted for millennia, and thus humans may have only played a minor role in the species' extinction.
