Intraguild Predation: Predatory Networks at the Microbial Scale

Kuppardt-Kirmse, Anke; Chatzinotas, Antonis

doi:10.1007/978-3-030-45599-6_3

Cited by 6 publications

(4 citation statements)

References 183 publications

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“…Microbial communities are complex, functionally-diverse, multi-trophic food webs (Bengtsson, Setälä and Zheng 1996;Petchey et al 1999;Gao et al 2019;Thakur and Geisen 2019) in which energy and matter flow between organisms that occupy different trophic positions and play a variety of functional roles (Fenchel 2008;Steinberg and Landry 2017). Ecosystem responses to climate change are thus likely regulated by changes in overall microbial food web dynamics and organization (Thakur and Geisen 2019;Kuppardt-Kirmse and Chatzinotas 2020). Viruses could play important roles in these changes that depend on i) the relative infection rates of hosts in different functional groups, ii) the temperature dependencies of the viral infection cycle, iii) thermal matching between virushost pairs, and iv) changes in host physiology, population dynamics, and species interactions associated with viral infection.…”

Section: Warmingmentioning

confidence: 99%

Viral infections mediate microbial controls on ecosystem responses to global warming

Wieczynski

Yoshimura

Denison

et al. 2022

Preprint

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Climate change is affecting how energy and matter flow within ecosystems, altering global carbon and nutrient cycles. Microorganisms play a fundamental role in carbon and nutrient cycling and are thus an integral link between ecosystems and climate. Here, we highlight a major black box hindering our ability to anticipate ecosystem climate responses: viral infections within complex microbial food webs. We show how understanding and predicting ecosystem responses to warming could be challenging—if not impossible—without accounting for the direct and indirect effects of viral infections on different microbes (bacteria, fungi, protists) that together perform diverse ecosystem functions. Importantly, understanding how rising temperatures associated with climate change influence viruses and virus-host dynamics is crucial to this task, yet severely understudied. In this perspective, we 1) synthesize existing knowledge about virus-microbe-temperature interactions and 2) identify important gaps to guide future investigations regarding how climate change might alter microbial food web effects on ecosystem functioning. To provide real-world context, we consider how these processes may operate in peatlands—globally significant carbon sinks that are threatened by climate change. We stress that understanding how warming affects biogeochemical cycles in any ecosystem hinges on disentangling complex interactions and temperature responses within microbial food webs.

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Section: Warmingmentioning

confidence: 99%

Viral infections mediate microbial controls on ecosystem responses to global warming

Wieczynski

Yoshimura

Denison

et al. 2022

Preprint

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“…Only a few studies have been reported Johnke et al, 2017;Hobley et al, 2020). The issue of intraguild predation has been recently discussed by Kuppardt-Kirmse and Chatzinotas (2020). Related to this is the need for a greater understanding of the role of BALO predation and lyses of its' prey in the cycling of nutrients through the microbial loop.…”

Section: Directions For Future Studymentioning

confidence: 99%

Environmental Regulation of the Distribution and Ecology of Bdellovibrio and Like Organisms

Williams

Chen

2020

Front. Microbiol.

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“…Microbial organisms play a critical role in ecosystem carbon and nutrient cycling (Geisen et al, 2020; Kayranli et al, 2010; Rocca et al, 2022; Schimel & Schaeffer, 2012; Steinberg & Landry, 2017; Zhang et al, 2018) that is likely to change with rapidly shifting global conditions (Bradford et al, 2019; Geisen et al, 2021; Smith et al, 2019; Wieczynski et al, 2021; Zhou et al, 2012). Understanding the net impacts of global change on ecosystem flux requires untangling the roles of a diverse assortment of ecological strategies within the microbial world (Bengtsson et al, 1996; Gao et al, 2019; Geisen et al, 2020; Kuppardt‐Kirmse & Chatzinotas, 2020; Petchey et al, 1999; Thakur & Geisen, 2019).…”

Section: Introductionmentioning

confidence: 99%

Mixotrophic microbes create carbon tipping points under warming

2023

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Mixotrophs are ubiquitous and integral to microbial food webs, but their impacts on the dynamics and functioning of broader ecosystems are largely unresolved. Here, we show that mixotrophy produces a unique type of food web module that exhibits unusual ecological dynamics, with surprising consequences for carbon flux under warming. We develop a generalizable model of a mixotrophic food web module that incorporates dynamic switching between phototrophy and phagotrophy to assess ecological dynamics and total system CO2 flux. We find that warming switches mixotrophic systems between alternative stable carbon states—including a phototrophy‐dominant carbon sink state, a phagotrophy‐dominant carbon source state and cycling between these two. Moreover, warming always shifts this mixotrophic system from a carbon sink state to a carbon source state, but a coordinated increase in nutrients can erase early warning signals of this transition and expand hysteresis. This suggests that mixotrophs can generate critical carbon tipping points under warming that will be more abrupt and less reversible when combined with increased nutrient levels, having widespread implications for ecosystem functioning in the face of rapid global change. Read the free Plain Language Summary for this article on the Journal blog.

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Intraguild Predation: Predatory Networks at the Microbial Scale

Cited by 6 publications

References 183 publications

Viral infections mediate microbial controls on ecosystem responses to global warming

Viral infections mediate microbial controls on ecosystem responses to global warming

Environmental Regulation of the Distribution and Ecology of Bdellovibrio and Like Organisms

Mixotrophic microbes create carbon tipping points under warming

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