Shifts in cell size and community composition of bacterioplankton due to grazing by heterotrophic flagellates: evidence from a marine system

Weinbauer, Markus G.; Suominen, Saara; Jezbera, Jan; Kerros, ME; Marro, Sophie; Dolan, J. R.; Šimek, Karel

doi:10.3354/ame01919

Cited by 5 publications

(4 citation statements)

References 60 publications

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“…With respect to cross‐domain interactions, selective grazing of mixotrophic and heterotrophic protists may directly influence community structure as well as abundance and gene expression of prokaryotic taxa (Šimek et al ., ; Hirakata et al ., ; Grujcic et al ., ; Beisser et al ., ; Weinbauer et al ., ). Heterotrophic protists, in particular the Ciliophora, showed in our study a strong response to bacterial OTUs (Figs A and ).…”

Section: Discussionmentioning

confidence: 97%

Factors shaping community patterns of protists and bacteria on a European scale

Böck

Jensen

Forster

et al. 2020

Environmental Microbiology

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Factors shaping community patterns of microorganisms are controversially discussed. Physical and chemical factors certainly limit the survival of individual taxa and maintenance of diversity. In recent years, a contribution of geographic distance and dispersal barriers to distribution patterns of protists and bacteria has been demonstrated. Organismic interactions such as competition, predation and mutualism further modify community structure and maintenance of distinct taxa. Here, we address the relative importance of these different factors in shaping protists and bacterial communities on a European scale using high-throughput sequencing data obtained from lentic freshwater ecosystems. We show that community patterns of protists are similar to those of bacteria. Our results indicate that cross-domain organismic factors are important variables with a higher influence on protists as compared with bacteria. Abiotic physical and chemical factors also contributed significantly to community patterns. The contribution of these latter factors was higher for bacteria, which may reflect a stronger biogeochemical coupling. The contribution of geographical distance was similar for both microbial groups.

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Section: Discussionmentioning

confidence: 97%

Factors shaping community patterns of protists and bacteria on a European scale

Böck

Jensen

Forster

et al. 2020

Environmental Microbiology

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“…They contain members belonging to the functional group of aerobic anoxygenic phototrophs ( 35 – 37 ), which are also identified in this experiment in the AAP library. Both the AAP and the Roseobacter clade are known to be highly susceptible to grazing ( 11 , 38 ).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the indicated changes within larger phylogroups also highlight the importance of rare phylotypes (especially noticeable for a couple of OTUs affiliated with Oceanospirillales , like Marinobacterium [OTU12] or Spongiispira [OTU7], or Rhodobacterales , such as OTU5 [ASV7]) ( Table 2 , see Fig. S4 and S7 in the supplemental material), which can readily respond to more favorable conditions and outcompete initially more abundant phylotypes ( 38 , 44 ).…”

Section: Discussionmentioning

confidence: 99%

Lineage-Specific Growth Curves Document Large Differences in Response of Individual Groups of Marine Bacteria to the Top-Down and Bottom-Up Controls

et al. 2021

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“…Polaribacter is an example of, one of the most abundant characteristic genera for diatom, exhibiting high specificity for the binding and utilization of the diatom polysaccharide 20 . It dominates in in situ diatom blooms 21 and becomes suppressed in dinoflagellate blooms 22, 23 , confirming its preference in the phycosphere of diatoms. On the contrary, phytoplankton associated Roseibium and Balneola are exclusively found in the phycosphere of dinoflagellates, with the presumed ability to regulate the synthesis of toxins in dinoflagellates 24, 25 .…”

Section: Discussionmentioning

confidence: 69%

Redefinition of archetypal phytoplankton-associated bacteria taxa based on globally distributed dinoflagellates and diatoms

Yang

Cai

et al. 2023

Preprint

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Bacteria colonizing in the phycosphere formed by phytoplankton exudates play important roles in marine ecosystems, yet their taxonomy is poorly defined. Here, we customized the analytical approaches for the microalga-attached microbiotas from 110 diatom and 86 dinoflagellate samples to reveal key bacterial players and their ecological significance in the phycosphere. The results demonstrated a co-occurrence of host-specificity and conservation of phytoplankton-associated bacterial communities, defined 8 diatom- and 23 dinoflagellate-affiliated characteristic genera, as well as identifying 14 core genera prevalent with phytoplankton populations. Further classification of these 14 core genera into three tiers showed their distinct ecological features regarding occupancy, connectivity and community-stabilizing, whilst also matching their inherent metabolic properties. Our study redefines the archetypal phytoplankton-associated bacteria taxa more specifically up to the genus level, highlighting the significance of rarely noticed bacteria in the phycosphere, which is invaluable when selecting target bacteria for studying phytoplankton-bacteria interactions.

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Shifts in cell size and community composition of bacterioplankton due to grazing by heterotrophic flagellates: evidence from a marine system

Cited by 5 publications

References 60 publications

Factors shaping community patterns of protists and bacteria on a European scale

Factors shaping community patterns of protists and bacteria on a European scale

Lineage-Specific Growth Curves Document Large Differences in Response of Individual Groups of Marine Bacteria to the Top-Down and Bottom-Up Controls

Redefinition of archetypal phytoplankton-associated bacteria taxa based on globally distributed dinoflagellates and diatoms

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