Temperature limits to deep subseafloor life in the Nankai Trough subduction zone
發布時間 🤏🏽🧑🏼‍💻:2021-07-18  閱讀次數 ⏪:18487

【IC-DIL Webinar】

Speaker🧘🏻‍♀️:Dr. Verena B. Heuer

Title:“Temperature limits to deep subseafloor life in the Nankai Trough subduction zone”

Time:20th July 2021, 13 : 00 pm [UTC]  21: 00 pm [Beijing]

ZOOM Meeting:841 2952 6874🎛; Passcode:750699;

Join Zoom Meeting📍:https://us06web.zoom.us/j/84129526874?pwd=SEJQbzA3bjhHZDVWbXc3d0ZBYXlYdz09

 

Abstract🌗:

"Microorganisms in marine subsurface sediments substantially contribute to global biomass. Sediments warmer than 40°C account for roughly half the marine sediment volume, but the processes mediated by microbial populations in these hard-to-access environments are poorly understood. We investigated microbial life in up to 1.2-kilometer-deep and up to 120°C hot sediments in the Nankai Trough subduction zone. Above 45°C, concentrations of vegetative cells drop two orders of magnitude and endospores become more than 6000 times more abundant than vegetative cells. Methane is biologically produced and oxidized until sediments reach 80° to 85°C. In 100° to 120°C sediments, isotopic evidence and increased cell concentrations demonstrate the activity of acetate-degrading hyperthermophiles. Above 45°C, populated zones alternate with zones up to 192 meters thick where microbes were undetectable."

"Our study reveals the dependence of microbial abundance and activity to critical temperatures around 40‐50°C and 70°C; it moreover shows that life in the deep subseafloor is not constrained by an upper temperature limit below 120°C. Our findings highlight the interplay of geological processes, temperature and microbial life in the deep, hot sediments of the Nankai Trough, and suggest a critical influence of subduction‐related geological processes on habitability."

EON体育4平台专业提供🙇🏿:EON体育4平台🪴、EON体育4EON体育4登录等服务,提供最新官网平台、地址、注册、登陆、登录、入口、全站、网站、网页、网址、娱乐、手机版、app、下载、欧洲杯、欧冠、nba、世界杯、英超等,界面美观优质完美,安全稳定,服务一流👩🏻‍🎨🧑🏽‍🎄,EON体育4平台欢迎您。 EON体育4平台官網xml地圖