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Links between microbial biomass and necromass components in the top- and subsoils of temperate grasslands along an aridity gradient

文献类型：期刊论文

作者Zhang Xinying1,2; Dai Guohua2; Ma Tian1,2; Liu Nana3; Hu Huifeng2; Ma Wenhong4; Zhang Jin-Bo5; Wang Zhiheng3; Peterse Francien6; Feng Xiaojuan1,2
刊名Geoderma
出版日期2020-08
卷号379页码:1-11
关键词Microbial carbon, GDGTs, PLFAs, Amino sugars, Necromass
ISSN号0016-7061
DOI10.1016/j.geoderma.2020.114623
文献子类Article
英文摘要Microbial carbon has recently been highlighted to play a key role in the formation and persistence of soil organiccarbon, bearing significant implications for regulating ecosystem carbon stocks under global changes. However,microbial carbon distribution and the link between biomass and necromass components are poorly understood in natural soils, especially at depth. Here, we employ various microbial biomarkers, including phospholipid fatty acids (PLFAs), amino sugars and glycerol dialkyl glycerol tetraethers (GDGTs), to investigate the spatial distribution patterns of microbial biomass and necromass components in the top- (0–10 cm) versus subsoils (30–50 cm) across Chinese temperate grasslands along an aridity gradient. We find that bacterial necromass components are better preserved relative to bacterial biomass in the sub- than topsoil, possibly due to a stronger association of microbial necromass with calcium and/or lower nitrogen competition between plants and microbes at depth in these neutral-to-alkaline soils. As a result, there is a stronger link between bacterial necromass components (especially for core lipid branched GDGTs and muramic acid) and their producers (reflected by intact polar lipid-derived branched GDGTs) in the sub- than topsoil, while such a trend is not observed for fungi or archaea-derived components. Furthermore, using linear mixed effect model analyses, we find that aridity index best explains the concentration variance of most microbial biomarkers in the topsoil, whereas edaphic properties (i.e., pH and macronutrients) also contribute significantly to their variance in the subsoil. These findings highlight different links between microbial necromass and biomass components and distinct preservation mechanisms for microbial carbon at different soil depths, which is crucial for improved understandingof microbial carbon sequestration potentials at different depths in a changing environment.
WOS关键词Microbial carbon ; GDGTs ; PLFAs ; Amino sugars ; Necromass
WOS研究方向Soil Science
语种英语
WOS记录号WOS:000580657200007
源URL[http://ir.yic.ac.cn/handle/133337/40055]  
专题个人在本单位外知识产出
通讯作者Zhang Jin-Bo; Feng Xiaojuan
作者单位1.College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
2.State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
3.Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
4.School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
5.School of Geography Sciences, Nanjing Normal University, Nanjing 210023, China
6.Department of Earth Sciences, Utrecht University, Utrecht, Netherlands
推荐引用方式
GB/T 7714		 Zhang Xinying,Dai Guohua,Ma Tian,et al. Links between microbial biomass and necromass components in the top- and subsoils of temperate grasslands along an aridity gradient[J]. Geoderma,2020,379:1-11.
APA Zhang Xinying.,Dai Guohua.,Ma Tian.,Liu Nana.,Hu Huifeng.,...&Feng Xiaojuan.(2020).Links between microbial biomass and necromass components in the top- and subsoils of temperate grasslands along an aridity gradient.Geoderma,379,1-11.
MLA Zhang Xinying,et al."Links between microbial biomass and necromass components in the top- and subsoils of temperate grasslands along an aridity gradient".Geoderma 379(2020):1-11.

入库方式： OAI收割

来源：烟台海岸带研究所

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