Does microbial carbon use efficiency differ between particulate and mineral‐associated organic matter?

土壤学 生物 土壤有机质 微生物种群生物学 有机质 碳纤维 土壤碳 土壤水分 总有机碳 溶解有机碳 生物量(生态学) 环境化学 生态学 营养物 细菌 材料科学 复合材料 复合数 化学 遗传学
作者
Lixiao Ma,Erxiong Zhu,Juan Jia,Wang Ya,Enze Kang,Wenxing Yi,Zhenhui Jiang,Guohua Dai,Xiaojuan Feng
出处
期刊:Functional Ecology [Wiley]
卷期号:38 (7): 1510-1522 被引量:7
标识
DOI:10.1111/1365-2435.14569
摘要

Abstract Microbial carbon use efficiency (CUE), a key parameter to characterize microbial carbon conversion efficiency, is assumed to be similar in soil models for different soil functional pools with varied organic matter composition and nutrient availability, that is, particulate organic matter (POM) and mineral‐associated organic matter (MAOM). However, empirical studies comparing microbial CUE in POM versus MAOM are largely lacking. It is not known whether microbial CUE variance may underpin the variant behaviour (i.e. turnover and composition) of different soil functional pools. Here we collected surface soils from 25 natural forests and grasslands with divergent edaphic properties, and compared microbial CUE in their POM versus MAOM using soil fractionation in combination with incubation using 18 O‐labelled water. We also quantified edaphic properties, organic matter composition, microbial community structures and the stoichiometric imbalance of nitrogen (N) and phosphorus (P) relative to carbon based on the dissolved pool relative to microbial biomass (Im N and Im P ) to investigate variables regulating microbial CUE and its variation in POM relative to MAOM (CUE POM /CUE MAOM ). In contrast to our expectation, microbial CUE did not consistently differ between POM and MAOM across sites, albeit with large inter‐sample variations in CUE POM /CUE MAOM (from 0.3 to 4.4). Although MAOM had higher substrate quality, indicated by lower ratios of soil organic carbon to total nitrogen (C/N OM ) and higher N‐compounds/aromatic ratios, and higher proportions of r‐strategists and fast‐growing bacteria in the microbial community than POM, POM and MAOM had similar degrees of N limitation (i.e. Im N ), which was the best predictor of microbial CUE across all samples. Therefore, although MAOM harboured more N‐containing compounds than POM, N limitation was not necessarily lower, leading to an overall similar microbial CUE in POM and MAOM. Nevertheless, CUE POM /CUE MAOM decreased with increasing P limitation in POM relative to MAOM. Overall, our paper presents a comprehensive, empirical study comparing microbial CUE in POM and MAOM of diverse soils, and our results support the use of similar microbial CUE for POM and MAOM in soil models, but also highlight potential contrasts in microbial CUE between soil pools under strong P limitation. Such inferences deserve attention under potentially increasing P limitation induced by N deposition. This study advances our mechanistic understanding of ecological patterns and processes from the organismic to the ecosystem scale based on soil microbial physiology and different soil functional pools. Read the free Plain Language Summary for this article on the Journal blog.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
FashionBoy应助耶瑟儿采纳,获得30
刚刚
tjzbw完成签到,获得积分10
刚刚
搜集达人应助666pop采纳,获得10
2秒前
xdm发布了新的文献求助30
2秒前
3秒前
4秒前
frank19776发布了新的文献求助10
5秒前
5秒前
华仔应助糊涂的猎豹采纳,获得10
8秒前
风趣安青发布了新的文献求助10
11秒前
11秒前
916应助湛湛采纳,获得10
12秒前
xyzdmmm发布了新的文献求助200
13秒前
量子星尘发布了新的文献求助10
13秒前
14秒前
15秒前
16秒前
sbw发布了新的文献求助10
17秒前
17秒前
HC发布了新的文献求助10
19秒前
19秒前
20秒前
gaoyang123完成签到 ,获得积分10
22秒前
飞鱼完成签到,获得积分20
23秒前
23秒前
25秒前
阿白完成签到,获得积分10
25秒前
DENANANA发布了新的文献求助10
25秒前
biyeshunli发布了新的文献求助10
26秒前
27秒前
27秒前
神勇绮琴应助迷人荷花采纳,获得10
27秒前
慕青应助坚强的语琴采纳,获得10
28秒前
29秒前
岑岑完成签到,获得积分10
29秒前
30秒前
30秒前
30秒前
wbl1025发布了新的文献求助30
31秒前
Vincent完成签到,获得积分10
31秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975693
求助须知:如何正确求助?哪些是违规求助? 3520019
关于积分的说明 11200635
捐赠科研通 3256410
什么是DOI,文献DOI怎么找? 1798255
邀请新用户注册赠送积分活动 877490
科研通“疑难数据库(出版商)”最低求助积分说明 806390