Journal Article climate change global change IUCN Red List Letter Red List Categories and Criteria Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. biodiversity carbon cycle climate warming detritivores extinction risk globally distributed study land use change linked demographic-habitat models litter quality macroecology metabolic theory of ecology microorganisms plant litter decomposition population declines probability of extinction stream ecosystem functioning temperature sensitivity threatened species