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- W4282013741 abstract "Predators and their foraging strategies often determine ecosystem structure and function. Yet, the role of protozoan predators in microbial soil ecosystems remains elusive despite the importance of these ecosystems to global biogeochemical cycles. In particular, amoebae -- the most abundant soil protozoan predators of bacteria -- remineralize soil nutrients and shape the bacterial community. However, their foraging strategies and their role as microbial ecosystem engineers remain unknown. Here we present a multi-scale approach, connecting microscopic single-cell analysis and macroscopic whole ecosystem dynamics, to expose a phylogenetically widespread foraging strategy, in which an amoeba population spontaneously partitions between cells with fast, polarized movement and cells with slow, unpolarized movement. Such differentiated motion gives rise to efficient colony expansion and consumption of the bacterial substrate. From these insights we construct a theoretical model that predicts how disturbances to amoeba growth rate and movement disrupt their predation efficiency. These disturbances correspond to distinct classes of bacterial defenses, which allows us to experimentally validate our predictions. All considered, our characterization of amoeba foraging identifies amoeba mobility, and not amoeba growth, as the core determinant of predation efficiency and a key target for bacterial defense systems." @default.
- W4282013741 created "2022-06-13" @default.
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- W4282013741 date "2022-05-24" @default.
- W4282013741 modified "2023-09-24" @default.
- W4282013741 title "Structured foraging of soil predators unveils functional responses to bacterial defenses" @default.
- W4282013741 doi "https://doi.org/10.48550/arxiv.2205.12341" @default.
- W4282013741 hasPublicationYear "2022" @default.
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