The Role of Grazing on Bacteria in Plankton Succession

Güde, Hans

doi:10.1007/978-3-642-74890-5_9

Cited by 89 publications

(42 citation statements)

References 89 publications

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“…Data from the parallel control stage also confirmed that the extreme changes were caused by protist grazing (27). The effects also were consistent with those of previous experiments (16) and literature data (14,15). The size-specific effects of protozoan grazing agreed with those of investigations using microscopy and image cytometry of bacterial cells (16).…”

Section: Protozoan Grazingsupporting

confidence: 89%

Detection of subgroups from flow cytometry measurements of heterotrophic bacterioplankton by image analysis

et al. 2001

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Section: Protozoan Grazingsupporting

confidence: 89%

Detection of subgroups from flow cytometry measurements of heterotrophic bacterioplankton by image analysis

et al. 2001

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“…In those studies, enrichments of microeukaryote predators resulted in a decrease in the abundance of members of the Bacteroidetes (111,175,192). In planktonic environments, predator-prey interactions are particularly influenced by the size-structure of microbial prey and predators (71). Size-selective grazing by bacteriovorous nanoflagellates allows the smallest bacterial cells to largely avoid or altogether escape predation.…”

Section: Phylum Bacteroidetesmentioning

confidence: 99%

A Guide to the Natural History of Freshwater Lake Bacteria

Newton

Jones

Eiler

et al. 2011

Microbiol Mol Biol Rev

1,350

127

1,448

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SUMMARY Freshwater bacteria are at the hub of biogeochemical cycles and control water quality in lakes. Despite this, little is known about the identity and ecology of functionally significant lake bacteria. Molecular studies have identified many abundant lake bacteria, but there is a large variation in the taxonomic or phylogenetic breadths among the methods used for this exploration. Because of this, an inconsistent and overlapping naming structure has developed for freshwater bacteria, creating a significant obstacle to identifying coherent ecological traits among these groups. A discourse that unites the field is sorely needed. Here we present a new freshwater lake phylogeny constructed from all published 16S rRNA gene sequences from lake epilimnia and propose a unifying vocabulary to discuss freshwater taxa. With this new vocabulary in place, we review the current information on the ecology, ecophysiology, and distribution of lake bacteria and highlight newly identified phylotypes. In the second part of our review, we conduct meta-analyses on the compiled data, identifying distribution patterns for bacterial phylotypes among biomes and across environmental gradients in lakes. We conclude by emphasizing the role that this review can play in providing a coherent framework for future studies.

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“…In planktonic environments, size-structured predator-prey interactions are of particular importance (22), and bacterial cell size must also be considered a major feature which impacts vulnerability towards different grazers (10). Size-selective grazing by bacterivorous nanoflagellates exerts the strongest grazing pressure on medium-sized cells, whereas bacteria obtain a predation refuge at the lower end of the prey size spectrum as well as at the upper end (10).…”

mentioning

confidence: 99%

“…Size-selective grazing by bacterivorous nanoflagellates exerts the strongest grazing pressure on medium-sized cells, whereas bacteria obtain a predation refuge at the lower end of the prey size spectrum as well as at the upper end (10). For the smallest bacteria, this is partly due to a reduced number of encounters and partly due to the inability of certain grazers to capture small cells (17,18).…”

mentioning

confidence: 99%

Direct and Indirect Effects of Protist Predation on Population Size Structure of a Bacterial Strain with High Phenotypic Plasticity

Corno

Jürgens

2006

Appl Environ Microbiol

153

172

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We studied the impact of grazing and substrate supply on the size structure of a freshwater bacterial strain (Flectobacillus sp.) which showed pronounced morphological plasticity. The cell length varied from 2 to >40 m and encompassed rods, curved cells, and long filaments. Without grazers and with a sufficient substrate supply, bacteria grew mainly in the form of medium-sized rods (4 to 7 m), with a smaller proportion (<10%) of filamentous forms. Grazing experiments with the bacterivorous flagellate Ochromonas sp. showed that freely suspended cells of <7 m were highly vulnerable to grazers, whereas filamentous cells were resistant to grazing and became enriched during predation. A comparison of long-term growth in carbon-limited chemostats with and without grazers revealed that strikingly different bacterial populations developed: treatments with flagellates were composed of >80% filamentous cells. These attained a biomass comparable to that of populations in chemostats without grazers, which were composed of medium-sized rods and c-shaped cells. Carbon starvation resulted in a fast decrease in cell length and a shift towards small rods, which were highly vulnerable to grazing. Dialysis bag experiments in combination with continuous cultivation revealed that filament formation was significantly enhanced even without direct contact of bacteria with bacterivores and was thus probably stimulated by grazer excretory products.

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The Role of Grazing on Bacteria in Plankton Succession

Cited by 89 publications

References 89 publications

Detection of subgroups from flow cytometry measurements of heterotrophic bacterioplankton by image analysis

Detection of subgroups from flow cytometry measurements of heterotrophic bacterioplankton by image analysis

A Guide to the Natural History of Freshwater Lake Bacteria

Direct and Indirect Effects of Protist Predation on Population Size Structure of a Bacterial Strain with High Phenotypic Plasticity

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