Community composition and respiration rates of bacterial and fungal communities from grass-covered eroded
soils of the Loess Plateau responded differently to constant and increasing soil moisture (SM) regimes. The
soils were incubated with SM contents of 5%, 30%, and 45% and with wetting processes in the SM ranges from
5%to30%(5–30%),from5%to30%to45%(5–30–45%)andfrom30%to45%(30–45%);high-throughputsequenc-
ing and co-occurrence network analyses were applied to investigate the different responses of the bacterial and
fungal communities to changed SM. Our results showed that bacteria were more sensitive than fungi to changes
inSM. The dominant bacterial communities convertedfromActinobacterial to Proteobacteria and Acidobacteriain
5–30–45%wettingprocedure.Firmicutespreferredwetcondition and exhibitedslow resilience. However, no dif-
ference was observed for the Chloroflexi communities across any sample. The obvious difference in fungal com-
position was found between the wetting process of 5–30–45% and constant 45% SM. During the 5–30–45%
procedure, the respiration rate was higher than that at 30–45% procedure after incubation for 24 days. The res-
piration rate in 5–30% procedure was lower than that of 5–30–45% process after incubation for 16–27 days.
Thelargereffectsonbacterialresponsethanonfungiwereverifiedinnetworkanalysis.Multiplestepwiseregres-
sionanalysisshowedthat84.40%ofthevariationinbacterialrichnessanddiversityaswellasfungaldiversitycanbe explainedbychangesinsoil respiration rate inresponse to wetting procedure.Understandingthe response of
differencebetweenbacterialandfungalcommunitycomposition,phylum-levelsnetworksandrespirationrateto
changes in SM is essential for the management of plant-soil-water relationship in the ecosystem after natural vegetation restoration on the Loess Plateau.
1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation CAS and MWR 2.University of Chinese Academy of Sciences 3.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences 4.College of Resources and Environmental Sciences, Hunan Normal University 5.College of Environmental Science and Engineering, Hunan University
推荐引用方式 GB/T 7714
Panpan Jiao,Zhongwu Li,Lei Yang. Bacteria are more sensitive than fungi to moisture in eroded soil by natural grass vegetation restoration on the Loess Plateau[J]. Science of the Total Environment,2021,756(1):1-10.
APA
Panpan Jiao,Zhongwu Li,&Lei Yang.(2021).Bacteria are more sensitive than fungi to moisture in eroded soil by natural grass vegetation restoration on the Loess Plateau.Science of the Total Environment,756(1),1-10.
MLA
Panpan Jiao,et al."Bacteria are more sensitive than fungi to moisture in eroded soil by natural grass vegetation restoration on the Loess Plateau".Science of the Total Environment 756.1(2021):1-10.
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