Extracellular enzyme activity and stoichiometry: The effect of soil microbial element limitation during leaf litter decomposition
文献类型：期刊论文
| 作者 | Bai, Xuejuan1; Dippold, Michaela A.2; An, Shaoshan1; Wang, Baorong3; Zhang, Haixin4; Loeppmann, Sebastian5,6 |
| 刊名 | ECOLOGICAL INDICATORS
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 121页码:13 |
| ISSN号 | 1470-160X |
| 关键词 | Organic matter degradation Microorganisms Stoichiometric constraints Microbial community functions Loess Plateau |
| DOI | 10.1016/j.ecolind.2020.107200 |
| 通讯作者 | An, Shaoshan(shan@ms.iswc.ac.cn) |
| 英文摘要 | To explore carbon (C), nitrogen (N), and phosphorus (P) dynamics during leaf litter decomposition, we investigated the temporal variability of soil microbial biomass and associated soil enzyme activities. Our 342-day leaf litter (Quercus wutaishanica) decomposition experiment at the Loess Plateau (China) sheds light on how soil microorganisms - mainly the soil microbial biomass C, N, P, and soil enzyme activities - maintain element homeostasis of C, N, and P by producing soil enzymes during various phases of litter decomposition. Overall, the highest soil enzyme activities were measured in summer, whereas soil microbial biomass carbon (MBC) and soil microbial biomass nitrogen (MBN) were highest in winter. Soil water content and soil temperature had significant effects on soil enzyme activities and stoichiometry. The results indicate that the stoichiometry of extracellular enzyme activities (lnBG:lnNAG:lnAP) changes significantly between individual stages of litter decomposition. The resources available for microorganisms were restricted by C and P, while P limitation progressively decelerated during decomposition and C limitation was enhanced at the latest stage. Strong positive correlations between ecological indicators of microbial element limitation and soil enzyme activities indicated that microbes allocate C and nutrients towards soil enzyme production to mine for scarce nutrients. This adaptation strategy enabled the soil microorganisms to maintain element homeostasis. Soil MBC, MBN, soil microbial biomass phosphorus (MBP), MBC:MBN, MBC:MBP, and MBN:MBP rarely showed significant correlations with soil or leaf litter C, N, P, C:N, C:P, and N:P. This suggests no resource dependency of microbial element composition but supports the concept of element homeostasis of soil microorganisms. Besides compensating for element imbalances by adjusting soil enzyme production, the microorganisms also adjusted element use efficiencies such as C use efficiency. We conclude that the maintenance of element homeostasis by soil microorganisms induces a tight co-regulation of enzymes involved in covering their C and nutrient supply during successive litter degradation. |
| WOS关键词 | CARBON USE EFFICIENCY ; ECOENZYMATIC STOICHIOMETRY ; NUTRIENT LIMITATION ; ORGANIC-CARBON ; ECOLOGICAL STOICHIOMETRY ; BACTERIAL COMMUNITY ; SEASONAL DYNAMICS ; EXTRACTION METHOD ; LOESS PLATEAU ; N-LIMITATION |
| 资助项目 | National Natural Science Foundation of China[41671280] ; National Natural Science Foundation of China[41877074] |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000604895500004 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/136750]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | An, Shaoshan |
| 作者单位 | 1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dry Land Farming Loess, Yangling 712100, Shaanxi, Peoples R China 2.Georg August Univ Gottingen, Dept Agr Soil Sci, Gottingen, Germany 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China 5.Georg August Univ Goettingen, Fac Agr, Dept Crop Sci, Biogeochem Agroecosyst, Buesgenweg 2, D-37077 Gottingen, Germany 6.Univ Kiel, Inst Plant Nutr & Soil Sci, Kiel Herrmann Rodewald Str 2, D-24118 Kiel, Germany |
| 推荐引用方式 GB/T 7714 | Bai, Xuejuan,Dippold, Michaela A.,An, Shaoshan,et al. Extracellular enzyme activity and stoichiometry: The effect of soil microbial element limitation during leaf litter decomposition[J]. ECOLOGICAL INDICATORS,2021,121:13. |
| APA | Bai, Xuejuan,Dippold, Michaela A.,An, Shaoshan,Wang, Baorong,Zhang, Haixin,&Loeppmann, Sebastian.(2021).Extracellular enzyme activity and stoichiometry: The effect of soil microbial element limitation during leaf litter decomposition.ECOLOGICAL INDICATORS,121,13. |
| MLA | Bai, Xuejuan,et al."Extracellular enzyme activity and stoichiometry: The effect of soil microbial element limitation during leaf litter decomposition".ECOLOGICAL INDICATORS 121(2021):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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