A thermal trade-off between viral production and degradation drives virus-phytoplankton population dynamics,Ecology Letters

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A thermal trade-off between viral production and degradation drives virus-phytoplankton population dynamics
Ecology Letters ( IF 7.6 ) Pub Date : 2021-04-20 , DOI: 10.1111/ele.13722
David Demory ₁ , Joshua S. Weitz _{1,

2} , Anne‐Claire Baudoux ₃ , Suzanne Touzeau _{4,

5} , Natalie Simon ₃ , Sophie Rabouille ₆ , Antoine Sciandra ₇ , Olivier Bernard ₄

Affiliation

Marine viruses interact with microbial hosts in dynamic environments shaped by variation in abiotic factors, including temperature. However, the impacts of temperature on viral infection of phytoplankton are not well understood. Here we coupled mathematical modelling with experiments to explore the effect of temperature on virus-phytoplankton interactions. Our model shows the negative consequences of high temperatures on infection and suggests a temperature-dependent threshold between viral production and degradation. Modelling long-term dynamics in environments with different average temperatures revealed the potential for long-term host-virus coexistence, epidemic free or habitat loss states. We generalised our model to variation in global sea surface temperatures corresponding to present and future seas and show that climate change may differentially influence virus-host dynamics depending on the virus-host pair. Temperature-dependent changes in the infectivity of virus particles may lead to shifts in virus-host habitats in warmer oceans, analogous to projected changes in the habitats of macro-, microorganisms and pathogens.

中文翻译：

病毒生产和降解之间的热折衷驱动病毒浮游植物种群动态

海洋病毒在由非生物因素（包括温度）变化形成的动态环境中与微生物宿主相互作用。但是，温度对浮游植物病毒感染的影响尚不十分清楚。在这里，我们将数学建模与实验相结合，以探索温度对病毒-浮游植物相互作用的影响。我们的模型显示了高温对感染的负面影响，并提出了病毒产生和降解之间的温度依赖性阈值。对具有不同平均温度的环境中的长期动态进行建模，揭示了长期宿主病毒共存，无流行病或栖息地丧失状态的潜力。我们将模型推广到对应于当前和未来海洋的全球海表温度变化，并表明气候变化可能会根据病毒-宿主对而对病毒-宿主动态产生不同的影响。与温度有关的病毒颗粒感染力变化可能导致温暖海洋中病毒寄主生境发生变化，这与宏观，微生物和病原体生境的预计变化类似。

更新日期：2021-05-19

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