2021
DOI: 10.1101/2021.06.15.448546
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Disentangling top-down drivers of mortality underlying diel population dynamics ofProchlorococcusin the North Pacific Subtropical Gyre

Abstract: Marine ecosystem models often consider temporal dynamics on the order of months to years, and spatial dynamics over regional and global scales as a means to understand the ecology, evolution, and biogeochemical impacts of marine life. Large-scale dynamics are themselves driven over diel scales as a result of light-driven forcing, feedback, and interactions. Motivated by high-frequency measurements taken by Lagrangian sampling in the North Pacific Subtropical Gyre, we develop a hierarchical set of multitrophic … Show more

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Cited by 5 publications
(7 citation statements)
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References 157 publications
(259 reference statements)
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“…In modelling carbon flow and loss in a coastal system, up to 25% of carbon losses are not accounted for by viral lysis, protistan grazing, and small zooplankton feeding (Talmy et al, 2019). Similarly, comparison of measured daily mortality rates to a simple ecosystem model of viral and protistan grazing pressure reveal unexplained mortality (Beckett et al, 2021). Research examining other sources of predation is one way to address this gap in our understanding and quantification of microbial mortality in the ocean.…”
Section: Introductionmentioning
confidence: 99%
“…In modelling carbon flow and loss in a coastal system, up to 25% of carbon losses are not accounted for by viral lysis, protistan grazing, and small zooplankton feeding (Talmy et al, 2019). Similarly, comparison of measured daily mortality rates to a simple ecosystem model of viral and protistan grazing pressure reveal unexplained mortality (Beckett et al, 2021). Research examining other sources of predation is one way to address this gap in our understanding and quantification of microbial mortality in the ocean.…”
Section: Introductionmentioning
confidence: 99%
“…Such processes could include multi-organism interactions, as natural communities are much more complex than the laboratory co-cultures, as well as oceanographic processes such as nutrient injection through deep mixing. More generally, cell mortality is intimately linked with the amount and type of recycled organic matter, yet the rate of mortality in natural communities is highly unconstrained (72). Hence, better representation of mortality in mathematical models (e.g.…”
Section: Resultsmentioning
confidence: 99%
“…Hence, better representation of mortality in mathematical models (e.g. the use of appropriate mortality formulations) is likely important for understanding biogeochemical cycles (72). This study is a reminder that bacterial growth curves represent an information-rich representation of the life and death of cells, which can be mined to identify potential physiological changes of ecological relevance.…”
Section: Resultsmentioning
confidence: 99%
“…Such processes could include multi-organism interactions, as natural communities are much more complex than the laboratory co-cultures, as well as oceanographic processes such as nutrient injection through deep mixing. More generally, cell mortality is intimately linked with the amount and type of recycled organic matter, yet the rate of mortality in natural communities is highly unconstrained [73]. Hence, better representation of mortality in mathematical models (e.g.…”
Section: Mathematical Model Amentioning
confidence: 99%
“…Hence, better representation of mortality in mathematical models (e.g. the use of appropriate mortality formulations) is likely important for understanding biogeochemical cycles [73]. This may entail using one of the "off the shelf" models presented here, with their limitations (e.g.…”
Section: Mathematical Model Amentioning
confidence: 99%