Eco-evolutionary responses of the microbial loop to surface ocean warming and consequences for primary production

Cherabier, Philippe; Ferrière, Régis

doi:10.1038/s41396-021-01166-8

Cited by 11 publications

(4 citation statements)

References 75 publications

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“…Higher trophic levels, characterized by a slower demography hence by a slower pace of evolutionary response will also be impacted by it. The same goes for the recycling microbial loop that determines how much of the organic matter circulating into marine ecosystems is recycled toward the ocean surface and how much is exported to the deep ocean (Cherabier and Ferriere 2022). Extending our approach to simulate the simultaneous evolution of multiple traits (as done in Le Gland et al 2021) and the adaptive evolution of populations other than phytoplankton would provide an ideal modeling framework to address those currently unresolved issues.…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton adaptive resilience to climate change collapses in case of extreme events – A modeling study

Sauterey

Gland

Cermeño

et al. 2023

Preprint

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As climate change unravels, ecosystems are facing a warming of the climate and an increase in extreme heat events that are unprecedented in recent geological history. We know very little of the ability of oceanic phytoplankton communities, key players in the regulation of Earth's climate by the oceans, to adapt to these changes. Quantifying the resilience of phytoplankton communities to environmental stressors by means of adaptive evolution is however crucial to accurately predict the response of marine ecosystems to climate change. In this work, we use an eco-evolutionary model to simulate the adaptive response of marine phytoplankton to temperature changes in an initially temperate oligotrophic water-column. By exploring a wide range of scenarios of phytoplankton adaptive capacity, we find that phytoplankton can adapt to temperature increases, even very large ones, as long as they occur over the time scale of a century. However, when rapid and extreme events of temperature change are considered, the phytoplankton adaptive capacity breaks down in a number of our scenarios in which primary productivity plummets as a result. This suggests that current Earth System Models implicitly assuming perfect and instantaneous phytoplankton adaptation to temperature might be overestimating the phytoplankton's resilience to climate change.

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Section: Discussionmentioning

confidence: 99%

Phytoplankton adaptive resilience to climate change collapses in case of extreme events – A modeling study

Sauterey

Gland

Cermeño

et al. 2023

Preprint

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“…A lesson from strong pH perturbations under ocean acidification is that bacterial activity might increase (Piontek et al, 2010;Endres et al, 2014), such that a decrease under non-equilibrated OAE is conceivable. This would impair nutrient recycling and release in the surface ocean (Karthäuser et al, 2021;Cabanes et al, 2017), eventually shortening the bloom period (Böckmann et al, 2021;Sarthou et al, 2008;Cherabier and Ferrière, 2022) and consequently decrease the potential export production throughout a season (Iversen, 2023). On the other hand, copepods have been shown to increase their feeding rates in response to elevated pH (Li et al, 2008).…”

Section: Abiotic Precipitation Inorganic Carbon Fluxes and Carbonate ...mentioning

confidence: 99%

Particle fluxes by subtropical pelagic communities under ocean alkalinity enhancement

Suessle,

Taucher,

Goldenberg

et al. 2023

Preprint

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Abstract. Ocean alkalinity enhancement (OAE) has been proposed as a carbon dioxide removal technology (CDR) allowing for long term storage of carbon dioxide in the ocean. By changing the carbonate speciation in seawater, OAE may potentially alter marine ecosystems with implications for the biological carbon pump. Using mesocosmsthe subtropical North Atlantic, we provide first empirical insights into impacts of carbonate-based OAE on the vertical flux and attenuation of sinking particles in an oligotrophic plankton community. We enhanced total alkalinity (TA) in increments of 300 μmol kg-1, reaching up to ΔTA = 2400 µmol kg-1 compared to ambient TA. We applied a pCO2-equilibrated OAE approach, i.e. dissolved inorganic carbon (DIC) was raised simultaneously with TA to maintain seawater pCO2 in equilibrium with the atmosphere, thereby keeping perturbations of seawater carbonate chemistry moderate. The vertical flux of major elements including carbon, nitrogen, phosphorus and silicon, as well as their stoichiometric ratios (e.g. carbon-to-nitrogen) remained unaffected over 29 days of OAE. The particle properties controlling the flux attenuationinking velocities and remineralization rates also remained unaffected by OAE. However, we observed abiotic mineral precipitation at high OAE levels (ΔTA = 1800 μmol kg-1 and higher) that resulted in a substantial increase in PIC formation. The associated consumption of alkalinity reduces the efficiency of CO2 removal and emphasizes the importance of maintaining OAE within a carefully defined operating range. Our findings suggest that carbon export by oligotrophic plankton communities is insensitive to OAE perturbations using a CO2 pre-equilibrated approach. The integrity of ecosystem services is a prerequisite for large-scale application and should be further tested across a variety of nutrient-regimes and for less idealized OAE approaches.

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“…Moreover, the Tibetan Plateau has the largest inland saline lake in China: Qinghai Lake, which presents a higher level of buried surficial sediment organic carbon than many other large freshwater lakes in China, such as Taihu Lake ( Chen et al, 2021 ). Heterotrophic microorganisms mineralize organic matter to create the trophic base for detrital food webs ( Benstead et al, 2021 ), forming the microbial loop that accounts for a crucial portion of the energy and nutrient flow in most aquatic ecosystems, thus driving global carbon and nutrient cycles ( Cherabier and Ferriere, 2022 ; Villalba et al, 2022 ). Extracellular enzymes are secreted by the microbial assemblage to participate in the decomposition of organic sources and subsequent acquisition of limiting nutrients ( Hill et al, 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Extracellular enzyme stoichiometry reveals carbon and nitrogen limitations closely linked to bacterial communities in China’s largest saline lake

et al. 2022

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Saline lakes possess substantial carbon storage and play essential roles in global carbon cycling. Benthic microorganisms mine and decompose sediment organic matter via extracellular enzymes to acquire limiting nutrients and thus meet their element budgets, which ultimately causes variations in sediment carbon storage. However, current knowledge about microbial nutrient limitation and the associated organic carbon changes especially in saline lake remains elusive. Therefore, we took Qinghai Lake, the largest saline lake of China, as an example to identify the patterns and drivers of microbial metabolic limitations quantified by the vector analyses of extracellular enzyme stoichiometry. Benthic microorganisms were dominantly colimited by carbon (C) and nitrogen (N). Such microbial C limitation was aggravated upon the increases in water salinity and sediment total phosphorus, which suggests that sediment C loss would be elevated when the lake water is concentrated (increasing salinity) and phosphorus becomes enriched under climate change and nutrient pollution, respectively. Microbial N limitation was predominantly intensified by water total nitrogen and inhibited by C limitation. Among the microbial drivers of extracellular enzyme investments, bacterial community structure consistently exerted significant effects on the C, N, and P cycles and microbial C and N limitations, while fungi only altered the P cycle through species richness. These findings advance our knowledge of microbial metabolic limitation in saline lakes, which will provide insights towards a better understanding of global sediment C storage dynamics under climate warming and intensified human activity.

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Eco-evolutionary responses of the microbial loop to surface ocean warming and consequences for primary production

Cited by 11 publications

References 75 publications

Phytoplankton adaptive resilience to climate change collapses in case of extreme events – A modeling study

Phytoplankton adaptive resilience to climate change collapses in case of extreme events – A modeling study

Particle fluxes by subtropical pelagic communities under ocean alkalinity enhancement

Extracellular enzyme stoichiometry reveals carbon and nitrogen limitations closely linked to bacterial communities in China’s largest saline lake

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