Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China
Soil microorganisms are critical biological indicators for evaluating soil health and play a vital role in carbon (C)-climate feedback. In recent years, the accuracy of models in terms of predicting soil C pools has been improved by considering the involvement of microbes in the decomposition proces...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-02-01
|
| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2023.1105723/full |
| _version_ | 1828014370220670976 |
|---|---|
| author | Ruosong Qu Ruosong Qu Guanzhen Liu Guanzhen Liu Ming Yue Ming Yue Gangsheng Wang Changhui Peng Kefeng Wang Kefeng Wang Xiaoping Gao |
| author_facet | Ruosong Qu Ruosong Qu Guanzhen Liu Guanzhen Liu Ming Yue Ming Yue Gangsheng Wang Changhui Peng Kefeng Wang Kefeng Wang Xiaoping Gao |
| author_sort | Ruosong Qu |
| collection | DOAJ |
| description | Soil microorganisms are critical biological indicators for evaluating soil health and play a vital role in carbon (C)-climate feedback. In recent years, the accuracy of models in terms of predicting soil C pools has been improved by considering the involvement of microbes in the decomposition process in ecosystem models, but the parameter values of these models have been assumed by researchers without combining observed data with the models and without calibrating the microbial decomposition models. Here, we conducted an observational experiment from April 2021 to July 2022 in the Ziwuling Mountains, Loess Plateau, China, to explore the main influencing factors of soil respiration (RS) and determine which parameters can be incorporated into microbial decomposition models. The results showed that the RS rate is significantly correlated with soil temperature (TS) and moisture (MS), indicating that TS increases soil C loss. We attributed the non-significant correlation between RS and soil microbial biomass carbon (MBC) to variations in microbial use efficiency, which mitigated ecosystem C loss by reducing the ability of microorganisms to decompose organic resources at high temperatures. The structural equation modeling (SEM) results demonstrated that TS, microbial biomass, and enzyme activity are crucial factors affecting soil microbial activity. Our study revealed the relations between TS, microbial biomass, enzyme activity, and RS, which had important scientific implications for constructing microbial decomposition models that predict soil microbial activity under climate change in the future. To better understand the relationship between soil dynamics and C emissions, it will be necessary to incorporate climate data as well as RS and microbial parameters into microbial decomposition models, which will be important for soil conservation and reducing soil C loss in the Loess Plateau. |
| first_indexed | 2024-04-10T10:01:06Z |
| format | Article |
| id | doaj.art-5e8904aadc2e4553859bd319aee9d4a7 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-10T10:01:06Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-5e8904aadc2e4553859bd319aee9d4a72023-02-16T07:59:39ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2023-02-011410.3389/fmicb.2023.11057231105723Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, ChinaRuosong Qu0Ruosong Qu1Guanzhen Liu2Guanzhen Liu3Ming Yue4Ming Yue5Gangsheng Wang6Changhui Peng7Kefeng Wang8Kefeng Wang9Xiaoping Gao10Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi’an, ChinaCollege of Life Science, Northwest University, Xi’an, ChinaKey Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi’an, ChinaCollege of Life Science, Northwest University, Xi’an, ChinaKey Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi’an, ChinaCollege of Life Science, Northwest University, Xi’an, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Sciences, Institute for Water-Carbon Cycles and Carbon Neutrality, Wuhan University, Wuhan, ChinaDepartment of Biology Sciences, Institute of Environment Sciences, University of Quebec at Montreal, Montreal, QC, CanadaKey Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Northwest University, Xi’an, ChinaCollege of Life Science, Northwest University, Xi’an, ChinaShuanglong State-Owned Ecological Experimental Forest Farm of Qiaoshan State-Owned Forestry Administration of Yan'an City, Yan'an, Shaanxi, ChinaSoil microorganisms are critical biological indicators for evaluating soil health and play a vital role in carbon (C)-climate feedback. In recent years, the accuracy of models in terms of predicting soil C pools has been improved by considering the involvement of microbes in the decomposition process in ecosystem models, but the parameter values of these models have been assumed by researchers without combining observed data with the models and without calibrating the microbial decomposition models. Here, we conducted an observational experiment from April 2021 to July 2022 in the Ziwuling Mountains, Loess Plateau, China, to explore the main influencing factors of soil respiration (RS) and determine which parameters can be incorporated into microbial decomposition models. The results showed that the RS rate is significantly correlated with soil temperature (TS) and moisture (MS), indicating that TS increases soil C loss. We attributed the non-significant correlation between RS and soil microbial biomass carbon (MBC) to variations in microbial use efficiency, which mitigated ecosystem C loss by reducing the ability of microorganisms to decompose organic resources at high temperatures. The structural equation modeling (SEM) results demonstrated that TS, microbial biomass, and enzyme activity are crucial factors affecting soil microbial activity. Our study revealed the relations between TS, microbial biomass, enzyme activity, and RS, which had important scientific implications for constructing microbial decomposition models that predict soil microbial activity under climate change in the future. To better understand the relationship between soil dynamics and C emissions, it will be necessary to incorporate climate data as well as RS and microbial parameters into microbial decomposition models, which will be important for soil conservation and reducing soil C loss in the Loess Plateau.https://www.frontiersin.org/articles/10.3389/fmicb.2023.1105723/fullclimate changecarbon cyclesoil microbial activitymicrobial decomposition modelsoil respiration (CO2) |
| spellingShingle | Ruosong Qu Ruosong Qu Guanzhen Liu Guanzhen Liu Ming Yue Ming Yue Gangsheng Wang Changhui Peng Kefeng Wang Kefeng Wang Xiaoping Gao Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China Frontiers in Microbiology climate change carbon cycle soil microbial activity microbial decomposition model soil respiration (CO2) |
| title | Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China |
| title_full | Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China |
| title_fullStr | Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China |
| title_full_unstemmed | Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China |
| title_short | Soil temperature, microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in Ziwuling Mountains, China |
| title_sort | soil temperature microbial biomass and enzyme activity are the critical factors affecting soil respiration in different soil layers in ziwuling mountains china |
| topic | climate change carbon cycle soil microbial activity microbial decomposition model soil respiration (CO2) |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2023.1105723/full |
| work_keys_str_mv | AT ruosongqu soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT ruosongqu soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT guanzhenliu soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT guanzhenliu soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT mingyue soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT mingyue soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT gangshengwang soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT changhuipeng soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT kefengwang soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT kefengwang soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina AT xiaopinggao soiltemperaturemicrobialbiomassandenzymeactivityarethecriticalfactorsaffectingsoilrespirationindifferentsoillayersinziwulingmountainschina |