?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=N&rft.au=Pettorelli%2C+N&rft.aulast=Pettorelli&rft.pages=495&rft.atitle=Georgina+Mace+(1953-2020)&rft.volume=586&rft.title=Nature&rft.date=2020&rft.issue=7830&rft.genre=article