Variation in thermal physiology can drive the temperature-dependence of microbial community richness DOI Creative Commons
Tom Clegg, Samraat Pawar

eLife, Journal Year: 2024, Volume and Issue: 13

Published: Sept. 30, 2024

Predicting how species diversity changes along environmental gradients is an enduring problem in ecology. In microbes, current theories tend to invoke energy availability and enzyme kinetics as the main drivers of temperature-richness relationships. Here, we derive a general empirically-grounded theory that can explain this phenomenon by linking microbial richness competitive communities variation temperature-dependence their interaction growth rates. Specifically, shape community relationship depends on rapidly strength effective competition between pairs with temperature relative variance Furthermore, it predicts thermal specialist-generalist tradeoff rates alters coexistence shifting balance, causing peak at relatively higher temperatures. Finally, show observed patterns performance curves metabolic traits across extant bacterial taxa indeed sufficient generate variety community-level responses real world. Our results provide new mechanism help temperature-diversity communities, quantitative framework for interlinking physiology diversity.

Language: Английский

Warming decouples associations between microbial network complexity and ecosystem multifunctionality in alpine grasslands DOI
Kui Wang, Kai Xue, Wenjing Liu

et al.

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 374, P. 109189 - 109189

Published: July 19, 2024

Language: Английский

Citations

3
Overestimation of microbial community respiration caused by nitrification, and the identification of keystone groups associated with respiration DOI Creative Commons

Lianbao Zhang,

Wei Zhou, Yanwei Wang

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 10

Published: Jan. 29, 2024

Instruction Microbial community respiration (MCR) strongly controls the fate of organic carbon in ocean. The balance between MCR and primary production determines whether ocean is a net sink or source CO2 to atmosphere. Thus, it necessary estimate better understand role oceans global cycle. Methods based on apparent oxygen utilization (AOU) are predominant while electron transport system (ETS) assay gets increasing attention. Although methods get developed, few studies have been performed seasonal Because associated with temperature which changes along succession seasons, urgent study we measured using vivo tetrazolium salt 2-(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyltetrazolium chloride (INT) reduction rates oxygen-optode simultaneously AOU ETS from November 2020 2021 Aoshan Bay, China. Results highest appeared autumn, followed by summer, spring, winter, whereas activity autumn winter. trend estimated were not consistent, further analysis indicated that consumption induced nitrification caused overestimation evaluated AOU. Discussion groups correlated had ability degrade various substrates could energy directly light. It should be careful notice deviation assumed demand alternation day night. Furthermore, pattern bacterial year-round was distinct season-specific MCR. This raised warning for caution when estimating fully take photoheterotrophy into account assuming remineralization ETS.

Language: Английский

Citations

2
The community background alters the evolution of thermal performance DOI Creative Commons
Joseph Westley, Francisca C. García,

Ruth Warfield

et al.

Evolution Letters, Journal Year: 2024, Volume and Issue: 8(4), P. 505 - 513

Published: March 16, 2024

Microbes are key drivers of global biogeochemical cycles, and their functional roles arey dependent on temperature. Large population sizes rapid turnover rates mean that the predominant response microbes to environmental warming is likely be evolutionary, yet our understanding evolutionary responses temperature change in microbial systems rudimentary. Natural communities diverse assemblages interacting taxa. However, most studies investigating bacteria focused monocultures. Here, we utilize high-throughput experimental evolution both monoculture community contexts along a thermal gradient determine how interspecific interactions influence adaptation members. We found community-evolved isolates tended toward higher maximum growth across compared monoculture-evolved counterparts. also saw little evidence systematic shapes bacterial tolerance curves gradient. effect background selection was variable highly taxon-specific,with some taxa exhibiting pronounced changes while others were less impacted. acted as strong filter, resulting local extinction gradient, implying temperature-driven ecological factor shaping upon which can operate. These findings offer novel insight into impacts adaptation.

Language: Английский

Citations

2
Towards a more dynamic metabolic theory of ecology to predict climate change effects on biological systems DOI
Keila Stark, Tom Clegg, Joey R. Bernhardt

et al.

The American Naturalist, Journal Year: 2024, Volume and Issue: 205(3), P. 285 - 305

Published: Sept. 19, 2024

AbstractThe metabolic theory of ecology (MTE) aims to link biophysical constraints on individual rates the emergence patterns at population and ecosystem scales. Because MTE links temperature's kinetic effects metabolism ecological processes higher levels organization, it holds great potential mechanistically predict how complex systems respond warming increased temperature fluctuations under climate change. To scale up from individuals ecosystems, applications classical implicitly assume that focusing steady-state dynamics averaging responses across populations adequately capture dominant attributes biological systems. However, in context change, frequent perturbations steady state rapid changes thermal performance curves via plasticity evolution are almost guaranteed. Here, we explain some assumptions made when applying MTE's simplest canonical expression can lead blind spots understanding change affects this presents an opportunity for formal expansion theory. We review existing advances direction provide a decision tree identifying dynamic modifications needed certain research questions. conclude with empirical theoretical challenges be addressed more increasingly uncertain world.

Language: Английский

Citations

2
Variation in thermal physiology can drive the temperature-dependence of microbial community richness DOI Creative Commons
Tom Clegg, Samraat Pawar

eLife, Journal Year: 2024, Volume and Issue: 13

Published: Sept. 30, 2024

Predicting how species diversity changes along environmental gradients is an enduring problem in ecology. In microbes, current theories tend to invoke energy availability and enzyme kinetics as the main drivers of temperature-richness relationships. Here, we derive a general empirically-grounded theory that can explain this phenomenon by linking microbial richness competitive communities variation temperature-dependence their interaction growth rates. Specifically, shape community relationship depends on rapidly strength effective competition between pairs with temperature relative variance Furthermore, it predicts thermal specialist-generalist tradeoff rates alters coexistence shifting balance, causing peak at relatively higher temperatures. Finally, show observed patterns performance curves metabolic traits across extant bacterial taxa indeed sufficient generate variety community-level responses real world. Our results provide new mechanism help temperature-diversity communities, quantitative framework for interlinking physiology diversity.

Language: Английский

Citations

2