Regional contingencies in the relationship between aboveground biomass and litter in the world's grasslands. oleh Lydia R O'Halloran, Elizabeth T Borer, Eric W Seabloom, Andrew S MacDougall, Elsa E Cleland, Rebecca L McCulley, Sarah Hobbie, W Stan Harpole, Nicole M DeCrappeo, Chengjin Chu, Jonathan D Bakker, Kendi F Davies, Guozhen Du, Jennifer Firn, Nicole Hagenah, Kirsten S Hofmockel, Johannes M H Knops, Wei Li, Brett A Melbourne, John W Morgan, John L Orrock, Suzanne M Prober, Carly J Stevens