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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; Dai, Guohua; Ma, Tian1; Liu, Nana2,3; Hu, Huifeng; Ma, Wenhong4; Zhang, Jin-Bo; Wang, Zhiheng2,3; Peterse, Francien6; Feng, Xiaojuan1
刊名GEODERMA
出版日期2020
卷号379
ISSN号0016-7061
关键词Microbial carbon GDGTs PLFAs Amino sugars Necromass
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 organic carbon, 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 fungior 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 understanding of microbial carbon sequestration potentials at different depths in a changing environment.
学科主题Soil Science
电子版国际标准刊号1872-6259
出版地AMSTERDAM
WOS关键词DIALKYL GLYCEROL TETRAETHERS ; SOIL ORGANIC-MATTER ; MEMBRANE-LIPIDS ; INTACT POLAR ; CARBON SEQUESTRATION ; COMMUNITY STRUCTURE ; SURFACE SEDIMENTS ; MURAMIC ACID ; AMINO-SUGARS ; BACTERIAL
WOS研究方向Agriculture
语种英语
出版者ELSEVIER
WOS记录号WOS:000580657200007
资助机构Chinese National Key Development Program for Basic Research [2017YFC0503902] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41773067, 31971502, 31988102] ; Chinese Academy of Sciences CAS Interdisciplinary Innovation Team [JCTD-2018-06] ; China Exchange Program of the Royal Netherlands Academy of Arts and Sciences (KNAW) [530-6CDP17]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21547]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Peking Univ, Coll Urban & Environm Sci, Inst Ecol, Beijing 100871, Peoples R China
4.Peking Univ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China
5.Inner Mongolia Univ, Sch Ecol & Environm, Hohhot 010021, Peoples R China
6.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Peoples R China
7.Univ Utrecht, Dept Earth Sci, 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.
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.
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).

入库方式： OAI收割

来源：植物研究所

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