Community adaptation to temperature explains abrupt soil bacterial community shift along a geothermal gradient on Iceland

Weedon, James T.; Bååth, Erland; Rijkers, Ruud; Reischke, Stephanie; Sigurðsson, Bjarni D.; Oddsdóttir, Edda Sigurdís; Hal, Jurgen van; Aerts, Rien; Janssens, Ivan A.; Bodegom, Peter M. van

doi:10.1016/j.soilbio.2022.108914

Cited by 8 publications

(26 citation statements)

References 72 publications

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“…In contrast to T min , T opt is hypothesized to vary less between thermal environments (Rinnan et al, 2009). At the Toolik Lake moist acidic tundra site, estimated T opt was 23.5 • C, which is so far the lowest T opt described for a soil bacterial community in the Arctic (Rinnan et al, 2011;Weedon et al, 2023;Cruz-Paredes et al, 2021b) and is also comparable to soil bacterial communities from Antarctica (Donhauser et al, 2020;Rinnan et al, 2009Rinnan et al, , 2011van Gestel et al, 2020). This site was characterized by relatively low summer temperatures and moderate annual mean temperatures compared to the other sites (Table 1; Fig.…”

Section: Bacterial Community Compositionmentioning

confidence: 99%

“…Despite strong correlations over large spatial scales, an increase in the mean annual soil temperature does not necessarily lead to a shift in temperature-growth relationships of bacterial communities when soils are experimentally warmed in lab incubation and field studies (Pietikäinen et al, 2005;Birgander et al, 2013Birgander et al, , 2018Rinnan et al, 2011;Weedon et al, 2023). Instead, a common observation is a rapid change in the temperature-growth relationships driven by a community turnover when soils are incubated above the optimal growth temperature of the in situ soil bacterial community (Birgander et al, 2013;Donhauser et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…For example, sub-Arctic bacterial communities exhibit lower cardinal points for their temperature-growth relationships compared to bacterial communities of temperate ecosystems, with a T min of −9.6 to −7.0 • C and T opt 25 to 30 • C (Cruz- Paredes et al, 2021a;Rinnan et al, 2011). It is likely that soil warming will shift the temperature-growth relationships of sub-Arctic soil bacterial communities (Weedon et al, 2023;Rijkers et al, 2022). However, the in situ temperature-growth relationships of soil bacterial communities in the mid-to High Arctic are so far unknown and will need to be evaluated to understand the current temperature adaptation of soil bacterial communities and drivers of temperature adaptation under future climate conditions.…”

Section: Introductionmentioning

confidence: 99%

“…However, soil-temperaturelogger data are particularly scarce in the Arctic region (Lembrechts et al, 2021), leading to a need for potential alternative predictors of soil microbial temperature adaptation. DNA-based bacterial community composition measures have recently been shown to correlate with shifts in the temperature-growth relationships of a soil bacterial commu- nities (Donhauser et al, 2020;Rijkers et al, 2022;Weedon et al, 2023). More generally, temperature traits differ between members of bacterial communities from Arctic soils (Wang et al, 2021), and specific bacterial taxa have been associated with warming in forest soils across North America (Oliverio et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Maximum summer temperatures predict the temperature adaptation of Arctic soil bacterial communities

et al. 2023

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Abstract. Rapid warming of the Arctic terrestrial region has the potential to increase soil decomposition rates and form a carbon-driven feedback to future climate change. For an accurate prediction of the role of soil microbes in these processes, it will be important to understand the temperature responses of soil bacterial communities and implement them into biogeochemical models. The temperature adaptation of soil bacterial communities for a large part of the Arctic region is unknown. We evaluated the current temperature adaption of soil bacterial communities from 12 sampling sites in the sub- to High Arctic region. Temperature adaptation differed substantially between the soil bacterial communities of these sites, with estimates of optimal growth temperature (Topt) ranging between 23.4 ± 0.5 and 34.1 ± 3.7 ∘C. We evaluated possible statistical models for the prediction of the temperature adaption of soil bacterial communities based on different climate indices derived from soil temperature records or on bacterial community composition data. We found that highest daily average soil temperature was the best predictor for the Topt of the soil bacterial communities, increasing by 0.63 ∘C ∘C−1. We found no support for the prediction of temperature adaptation by regression tree analysis based on the relative abundance data of the most common bacterial species. Increasing summer temperatures will likely increase Topt of soil bacterial communities in the Arctic. Incorporating this mechanism into soil biogeochemical models and combining it with projections of soil temperature will help to reduce uncertainty in assessments of the vulnerability of soil carbon stocks in the Arctic.

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Section: Bacterial Community Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Maximum summer temperatures predict the temperature adaptation of Arctic soil bacterial communities

et al. 2023

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“…Recently, it has been shown by soil warming experiments that changes in the temperature adaptation of soil bacterial communities also occur under field conditions (Rousk et al, 2012;Nottingham et al, 2019aNottingham et al, , 2022Weedon et al, 2022).…”

Section: The Current Framework For Temperature Adaptation Of Bacteria...mentioning

confidence: 99%

Temperature adaptation of soil bacterial communities across the Arctic

Rijkers¹

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Microorganisms that inhabit soils across the Arctic are typically well adapted to low temperatures and are highly responsive to temperature increases. A change in temperature adaptation of microbial communities might affect how fast they will decompose soil organic matter in a warmed Arctic. Currently, the potential change in temperature adaptation of soil bacterial communities is under scientific debate, due to contrasting observations made in field and laboratory settings. Therefore, the overall aim of this thesis was to evaluate the current temperature adaption of soil bacterial communities in the Arctic and to investigate whether the temperature adaptation of arctic soil bacterial communities shifts when exposed to warmed conditions. In Chapter 2, the optimal growth temperature of bacterial communities increased when comparing samples from the colder sites to warmer sites. I observed that one of the most important factors for their temperature adaptation was the mean maximum soil temperature. I concluded from this study that increasing temperatures – especially summer temperatures – will likely alter the temperature adaptation of bacterial communities in arctic soils. To confirm this hypothesis, I conducted an incubation study with 8 soils collected from the (sub-) Arctic and exposed them to different temperatures, ranging between 0 and 30°C. When the soils were incubated, the bacterial communities altered their temperature adaptation depending on the incubation temperature. In the third chapter, I also found that the induced change in temperature adaptation of soil bacterial communities was accompanied by a change in the overall composition of the bacterial community. Therefore, I hypothesized that the individual response of bacterial species to soil warming might reflect the temperature adaptation. Thus, the abundance of particular bacterial species in a soil sample could be potentially used for estimating the temperature adaptation of soil bacterial communities. In chapter 4, I evaluated the use of bacterial species abundance as indicator of bacterial communities responding to soil warming. Along a natural warming gradient in Iceland, I show that, while there are changes in the composition of bacterial communities of grassland soil in response to soil warming, there are only very few bacterial species that respond to the warming through multiple and multiple levels of warming. Therefore, is limited use of bacterial abundance data in predicting the temperature adaptation and response to warming for soil bacterial communities. Overall, I did not observe bacterial species that are both 1. common amongst many soil types and 2. respond consistently to soil warming. In chapter 5, I used a trait-based model approach to test whether the current theoretical framework around thermal traits of soil bacterial species can explain the relationship between temperature adaptation of soil bacterial communities and the temperatures that they are exposed to. The model made relatively accurate predictions about the temperature adaptation of soil bacterial communities. Furthermore, I discuss which traits related to the thermal niche of a bacterial species are relevant for improved modelling. Finally, I conclude in Chapter 6 that bacterial communities will likely alter their temperature adaptation in response to long term exposure to warming. It will be important to further assess the influence of these changes on the functioning on soil bacterial communities in the Arctic. From this thesis the view emerges that changes in the temperature adaptation of soil bacterial communities are likely due to the changes in the ideal temperature range of individual bacterial species. Accurate predictions for the current and future temperature adaptation of soil bacterial communities will require more in-depth knowledge of the traits that bacteria possess related to temperature.

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Methylotrophic bacteria from rice paddy soils: mineral-nitrogen-utilizing isolates richness in bulk soil and rhizosphere

Yousaf,

Saleem,

Andleeb

et al. 2024

World J Microbiol Biotechnol

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Community adaptation to temperature explains abrupt soil bacterial community shift along a geothermal gradient on Iceland

Cited by 8 publications

References 72 publications

Maximum summer temperatures predict the temperature adaptation of Arctic soil bacterial communities

Maximum summer temperatures predict the temperature adaptation of Arctic soil bacterial communities

Temperature adaptation of soil bacterial communities across the Arctic

Methylotrophic bacteria from rice paddy soils: mineral-nitrogen-utilizing isolates richness in bulk soil and rhizosphere

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