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

doi:10.1016/j.geoderma.2020.114623

	Links between microbial biomass and necromass components in the top- and subsoils of temperate grasslands along an aridity gradient
	Zhang, Xinying 1; Dai, Guohua ; Ma, Tian 1; Liu, Nana 2,3; Hu, Huifeng ; Ma, Wenhong 4; Zhang, Jin-Bo ; Wang, Zhiheng 2,3; Peterse, Francien 6; Feng, Xiaojuan1
	2020
发表期刊	GEODERMA
ISSN	0016-7061
卷号	379
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.
关键词	Microbial carbon GDGTs PLFAs Amino sugars Necromass
学科领域	Soil Science
DOI	10.1016/j.geoderma.2020.114623
收录类别	SCI
语种	英语
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
WOS记录号	WOS:000580657200007
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-6259
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]
作者邮箱	xfeng@ibcas.ac.cn
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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).

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