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Impacts of climate-induced permafrost degradation on vegetation:A review

Advances in Climate Change Research 2021年第1期12卷 29-47页

作者： JIN Xiao-Ying JIN Hui-Juna Go IWAHANA Sergey SMARCHENKO LUO Dong-Liang LI Xiao-Ying LIANG Si-Hai Northeast-China Observatory and Research Station of permafrost Geological Environment(Ministry of Education) School of Civil EngineeringInstitute of Cold Region Science and TechnologyNortheast Forestry UniversityHarbin150040China State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China International Arctic Research Center University of Alaska FairbanksFairbanks99775USA permafrost Lab Geophysical InstituteUniversity of Alaska FairbanksFairbanks99775USA School of Water Resources and Environment China University of GeosciencesBeijing100083China

Under a warming climate,degrading permafrost profoundly and extensively affects arctic and alpine ***,most existing relevant studies are more focused on the hydrothermal impacts of vegetation on the underlying permafrost,or symbiosis between vegetation and permafrost,only very few on ecological impacts of permafrost ***,there are much more pertinent investigations in arctic and boreal regions than those in alpine and high-plateau regions at mid-and low *** study emphasizes on the impact mechanisms of permafrost degradation on vegetation both at high and mid-to low latitudes,addressing vegetation succession trajectories and associated changes in soil hydrology and soil nutrient above degrading *** degradation influences vegetation by altering soil hydrology,soil biogeochemical processes and microbial communities,which further improve soil nutrient ***,under a warming climate,vegetation may take two successional trajectories,towards a wetter or drier ecosystem within a certain time period,but to a drier ecosystem in the end upon the thaw of permafrost in case of permeable soils and good ***,with rapidly developing remote-sensing and other space-and ground-based and air-borne observational networks and numerical predictive models,the impacting mechanisms of permafrost degradation on vegetation should be timely and better monitored,evaluated and modeled at desired spatiotemporal scales and resolutions by terrestrial or integrated ecosystem models.

关键词： degrading permafrost Vegetation Impact mechanisms Climate warming Ecological impacts

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