Journal Article 7440-44-0 Carbon Electric vehicle Research Support, Non-U.S. Gov't Retired EV batteries Shared collection service system Soil Supply chain management Tibetan Plateau Xizang alpine meadow arbuscular mycorrhizal fungi biomass allocation degradation ecological networks ecosystem respiration freeze-thaw events labile carbon limitation microbial community response number and frequency of freeze-thaw cycles precipitation addition resource exchange ratio semi-arid with ice-poor permafrost soil heterotrophic respiration soil incubation soil respiration acclimation warming gradient