永久冻土
土壤水分
生态系统
微生物种群生物学
生态学
生物地球化学循环
生物
群落结构
活动层
气候变化
高山气候
土壤微生物学
微生物生态学
化学
图层(电子)
薄膜晶体管
有机化学
细菌
遗传学
作者
Magdalene Adamczyk,Joël Rüthi,Beat Frey
标识
DOI:10.1111/1462-2920.15383
摘要
Due to climate warming, alpine ecosystems are changing rapidly. Ongoing upward migrations of plants and thus an increase of easily decomposable substrates will strongly affect the soil microbiome. To understand how belowground communities will respond to such changes, we set up an incubation experiment with permafrost and active soil layers from northern (NW) and southern (SE) slopes of a mountain ridge on Muot da Barba Peider in the Swiss Alps and incubated them with or without artificial root exudates (AREs) at two temperatures, 4°C or 15°C. The addition of AREs resulted in elevated respiration across all soil types. Bacterial and fungal alpha diversity decreased significantly, coinciding with strong shifts in microbial community structure in ARE-treated soils. These shifts in bacterial community structure were driven by an increased abundance of fast-growing copiotrophic taxa. Fungal communities were predominantly affected by AREs in SE active layer soils and shifted towards fast-growing opportunistic yeast. In contrast, in the colder NW facing active layer and permafrost soils fungal communities were more influenced by temperature changes. These findings demonstrate the sensitivity of soil microbial communities in high alpine ecosystems to climate change and how shifts in these communities may lead to functional changes impacting biogeochemical processes.
科研通智能强力驱动
Strongly Powered by AbleSci AI