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
嗝嗝完成签到,获得积分10
1秒前
Perry应助科研通管家采纳,获得30
1秒前
1秒前
今后应助水晶茶杯采纳,获得10
1秒前
peterlzb1234567完成签到,获得积分10
3秒前
natsu401完成签到 ,获得积分10
6秒前
mmddlj完成签到 ,获得积分10
6秒前
健康的雁凡完成签到,获得积分10
6秒前
稳重完成签到 ,获得积分10
8秒前
11秒前
haiqi完成签到,获得积分20
15秒前
白智妍发布了新的文献求助10
16秒前
王叮叮完成签到,获得积分10
17秒前
jeronimo完成签到,获得积分10
18秒前
18秒前
pcr163应助大橙子采纳,获得150
21秒前
李燕发布了新的文献求助10
23秒前
道友等等我完成签到,获得积分0
23秒前
狂野乌冬面完成签到 ,获得积分10
27秒前
xinglin完成签到 ,获得积分10
29秒前
清浅完成签到 ,获得积分10
29秒前
31秒前
32秒前
科奇完成签到,获得积分10
32秒前
可玩性完成签到 ,获得积分10
33秒前
要减肥岩完成签到,获得积分10
35秒前
Owen应助Snail采纳,获得10
37秒前
大橙子发布了新的文献求助10
37秒前
9239完成签到 ,获得积分10
38秒前
量子星尘发布了新的文献求助10
38秒前
songvv发布了新的文献求助10
38秒前
飒飒发布了新的文献求助10
39秒前
慧灰huihui完成签到,获得积分10
39秒前
Star完成签到,获得积分10
41秒前
41秒前
柔弱的不二完成签到,获得积分10
42秒前
无心的枫完成签到,获得积分10
44秒前
djdh完成签到 ,获得积分10
44秒前
肖果完成签到 ,获得积分10
47秒前
哭泣笑柳发布了新的文献求助10
48秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038184
求助须知:如何正确求助?哪些是违规求助? 3575908
关于积分的说明 11373872
捐赠科研通 3305715
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022