首页|Human activity over natural inputs determines the bacterial community in an ice core from the Muztag ata glacier

Human activity over natural inputs determines the bacterial community in an ice core from the Muztag ata glacier

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Ice core provides a valuable vertical timeline of past climates and anthropogenic activities.Environmental proxies have been widely used in these studies,but there are few biological indicators available.To address this gap,we investigated the bacterial community from a 74 m ice core of Muztag ata glacier on the Tibetan Plateau to link biological indicators with past climate and anthropogenic activities.By analyzing the portion of the ice core with environmental proxies available(corre-sponding to 1907 to 1991),we observed an increase in bacterial richness throughout the ice core,which was associated with higher NH4+,an indicator of agricultural development.The bacterial community was jointly determined by human activity,natural input,and air temperature,with a strong human influence after the 1950s.Furthermore,the relative abundance of animal gut-associated bacteria,including Aerococcaceae,Nocardiaceae,Muribaculaceae,and Lachnospiraceae,was associated with livestock number changes in the Central Asian region.Together with other bacterial lineages,they jointly explained 59.8％of the livestock number changes.This study provides quantitative evidence of the associations between bacterial indicators and past climate and human activities,highlighting the potential of using bacterial proxies for ice core studies.

Ice core of Muztag ata glacierClimate change and anthropogenic activityBiological indicatorGut-associated bacterialivestock number in the Central Asian region

Yongqin LIU、Nianzhi JIAO、Mukan JI、Keshao LIU、Baiqing XU、Bixi GUO、Tandong YAO

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State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment(TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

Center for Pan-third Pole Environment,Lanzhou University,Lanzhou 730013,China

University of Chinese Academy of Sciences,Beijing 100101,China

State Key Laboratory for Marine Environmental Science,Xiamen University,Xiamen 361102,China

State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment (TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

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2024

10.1007/s11430-022-1282-x

中国科学:地球科学(英文版)
中国科学院

中国科学:地球科学(英文版)

影响因子：1.002
ISSN：1674-7313
年,卷(期)：2024.67(5)