Unaltered soil microbial community composition, but decreased metabolic activity in a semiarid grassland after two years of passive experimental warming

Fang, Chao; Ke, Wenbin; Campioli, Matteo; Pei, Jiu-Ying; Yuan, Zi‐Qiang; Song, Xin; Ye, Jian‐Sheng; Li, Fengmin; Janssens, Ivan A.

doi:10.1002/ece3.6862

Cited by 14 publications

(5 citation statements)

References 128 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, both temperature and time led to large shifts and increased variability in community structure ( Figure 1D ), with the warmer temperature leading to a higher relative abundance of some bacterial taxa over others ( Figure 4A ; Martiny et al, 2013 ; Isobe et al, 2020 ). These results thus suggest a possible causal relationship between changes in community structure and function, as proposed by others ( Hall et al, 2018 ), and despite such changes being rarely observed ( Rocca et al, 2015 ; Graham et al, 2016 ; Fang et al, 2020 ). While changes in carbon use efficiency have been recently accounted for in state-of-the-art forecasting models ( Allison et al, 2010 ; Sinsabaugh et al, 2013 ), changes in bacterial community structure have not Sulman et al (2018) .…”

Section: Discussionsupporting

confidence: 83%

Protist Predation Influences the Temperature Response of Bacterial Communities

et al. 2022

View full text Add to dashboard Cite

Temperature strongly influences microbial community structure and function, in turn contributing to global carbon cycling that can fuel further warming. Recent studies suggest that biotic interactions among microbes may play an important role in determining the temperature responses of these communities. However, how predation regulates these microbiomes under future climates is still poorly understood. Here, we assess whether predation by a key global bacterial consumer—protists—influences the temperature response of the community structure and function of a freshwater microbiome. To do so, we exposed microbial communities to two cosmopolitan protist species—Tetrahymena thermophila and Colpidium sp.—at two different temperatures, in a month-long microcosm experiment. While microbial biomass and respiration increased with temperature due to community shifts, these responses changed over time and in the presence of protists. Protists influenced microbial biomass and respiration rate through direct and indirect effects on bacterial community structure, and predator presence actually reduced microbial respiration at elevated temperature. Indicator species analyses showed that these predator effects were mostly determined by phylum-specific bacterial responses to protist density and cell size. Our study supports previous findings that temperature is an important driver of microbial communities but also demonstrates that the presence of a large predator can mediate these responses to warming.

show abstract

Section: Discussionsupporting

confidence: 83%

Protist Predation Influences the Temperature Response of Bacterial Communities

et al. 2022

View full text Add to dashboard Cite

show abstract

“…On the other hand, both temperature and time led to large shifts and increased variability in community structure (Fig 2d), with the warmer temperature leading to a higher relative abundance of some microbial taxa over others (Fig 4), suggesting some degree of phylogenetically conserved responses (Isobe et al, 2020;Martiny et al, 2013). These results thus suggest a possible causal relationship between changes in community structure and function, as proposed by others (Hall et al, 2018), and despite such changes being rarely observed (Fang et al, 2020;Graham et al, 2016;Rocca et al, 2015). While changes in carbon use efficiency have been recently accounted for in state-of-the-art forecasting models (Allison et al, 2010;Sinsabaugh et al, 2013), changes in microbial community structure have not (Sulman et al, 2018).…”

Section: Discussionsupporting

confidence: 73%

Predation by protists influences the temperature response of microbial communities

Rocca

Yammine

Simonin

et al. 2021

Preprint

View full text Add to dashboard Cite

Temperature strongly influences microbial community structure and function, which in turn contributes to the global carbon cycle that can fuel further warming. Recent studies suggest that biotic interactions amongst microbes may play an important role in determining the temperature responses of these communities. However, how microbial predation regulates these communities under future climates is still poorly understood. Here we assess whether predation by one of the most important bacterial consumers globally, protists, influences the temperature response of a freshwater microbial community structure and function. To do so, we exposed these microbial communities to two cosmopolitan species of protists at two different temperatures, in a month-long microcosm experiment. While microbial biomass and respiration increased with temperature due to shifts in microbial community structure, these responses changed over time and in the presence of protist predators. Protists influenced microbial biomass and function through effects on community structure, and predation actually reduced microbial respiration rate at elevated temperature. Indicator species and threshold indicator taxa analyses showed that these predation effects were mostly determined by phylum-specific bacterial responses to protist density and cell size. Our study supports previous findings that temperature is an important driver of microbial communities, but also demonstrates that predation can mediate these responses to warming, with important consequences for the global carbon cycle and future warming.

show abstract

“…Warming exhibits divergent effects on soil fungi in various boreal forest ecosystems, leading to either stimulation or suppression of fungal biomass and activity (Allison & Treseder, 2008; Clemmensen et al, 2013), likely influenced by variations in soil moisture or vegetation among different sites. However, it is worth noting that certain studies have proposed that warming may not considerably affect the abundance or composition of microbial communities (Fang et al, 2020; Schindlbacher et al, 2011). These diverse responses emphasise the need for further research to fully understand how microorganisms respond to climate warming, and especially few studies have focused on the protist communities and their interactions with other microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Seasonality regulates the taxonomic and functional compositions of protists responding to climate warming in forest ecosystems

Li,

Sun,

Liu

et al. 2023

J of Sust Agri & Env

View full text Add to dashboard Cite

IntroductionProtists are unicellular eukaryotes including important predators, parasites and phototrophs, and play pivotal roles in organic matter decomposition, biogeochemical nutrient cycling and various ecosystem functions. Unravelling the impact of climate warming on soil protists is paramount in predicting how these microorganisms will continue to provide essential ecosystem services in the face of changing climatic conditions.Materials and MethodsWe examined the effects of 5‐year simulated climate warming scenario, with temperatures increased by 4°C above ambient levels, on the diversity and community composition of soil protists, as well as their interactions with other microorganisms in both natural and plantation forest ecosystems during three seasons: summer, autumn and winter.ResultsWe found a season‐dependent response of protists to climate warming, with a significant decrease in protist diversity during winter in natural forests. Furthermore, we identified significant alterations in the community compositions of protists during summer in both natural and plantation forests, as well as during winter in both forest types, under warming. Our analysis pinpointed specific functional protist taxa, such as consumers, parasites and phototrophs, which exhibited significant shifts in their relative abundances under warming. Additionally, we found that warming facilitated trophic interactions between protists and bacteria, while also strengthening interactions between bacterial and fungal communities. Warming could induce direct modifications in protist community compositions or indirectly affect them by modifying bacterial and fungal communities, as revealed by structural equation modelling.ConclusionThese findings demonstrate the substantial impact of warming on the taxonomic and functional compositions of protists in forest ecosystems, with the magnitude of these effects varying across seasons. Our study implicates that ongoing climate warming could have significant consequences for the profiles of soil protists, as well as their trophic interactions with bacteria and fungi, highlighting the importance of considering these effects for the sustainable provision of ecosystem functions.

show abstract

Unaltered soil microbial community composition, but decreased metabolic activity in a semiarid grassland after two years of passive experimental warming

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 14 publications

References 128 publications

Protist Predation Influences the Temperature Response of Bacterial Communities

Protist Predation Influences the Temperature Response of Bacterial Communities

Predation by protists influences the temperature response of microbial communities

Seasonality regulates the taxonomic and functional compositions of protists responding to climate warming in forest ecosystems

Contact Info

Product

Resources

About