Ingestion of bacteria in a eutrophic subtropical reservoir pond with food web mainly controlled by zooplankton grazing

Hisatugo, Karina Ferreira; Mansano, Adrislaine S.; Hayashi-Martins, L H; Regali-Seleghim, Mirna Helena

doi:10.1016/j.limno.2013.08.002

Cited by 10 publications

(4 citation statements)

References 36 publications

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“…Copepod feeding on picoplankton would be an unexpected path in the marine microbial food web but could occur as part of dead or live particles or via aggregate feeding [ 48 , 49 ]. Direct bacterivory by copepods is generally thought to form only a minor portion of carbon flow in aquatic food webs [ 50 , 51 ], but the data from this study suggest bacteria associated with food particles form a substantial portion of the copepod microbiome and possibly part of their nutrition. This conclusion is supported by our recent study from coastal North Atlantic waters in which the communities of N 2 -fixing bacteria in full gut copepods (primarily Acartia ) had high similarity with communities in seawater while the diazotrophic communities in starved Acartia spp.…”

Section: Discussionmentioning

confidence: 70%

Stable Associations Masked by Temporal Variability in the Marine Copepod Microbiome

2015

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Copepod-bacteria interactions include permanent and transient epi- and endobiotic associations that may play roles in copepod health, transfer of elements in the food web, and biogeochemical cycling. Microbiomes of three temperate copepod species (Acartia longiremis, Centropages hamatus, and Calanus finmarchicus) from the Gulf of Maine were investigated during the early summer season using high throughput amplicon sequencing. The most prominent stable component of the microbiome included several taxa within Gammaproteobacteria, with Pseudoalteromonas spp. especially abundant across copepod species. These Gammaproteobacteria appear to be promoted by the copepod association, likely benefitting from nutrient enriched microenvironments on copepods, and forming a more important part of the copepod-associated community than Vibrio spp. during the cold-water season in this temperate system. Taxon-specific associations included an elevated relative abundance of Piscirickettsiaceae and Colwelliaceae on Calanus, and Marinomonas sp. in Centropages. The communities in full and voided gut copepods had distinct characteristics, thus the presence of a food-associated microbiome was evident, including higher abundance of Rhodobacteraceae and chloroplast sequences in the transient communities. The observed variability was partially explained by collection date that may be linked to factors such as variable time since molting, gender differences, and changes in food availability and type over the study period. While some taxon-specific and stable associations were identified, temporal changes in environmental conditions, including food type, appear to be key in controlling the composition of bacterial communities associated with copepods in this temperate coastal system during the early summer.

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Section: Discussionmentioning

confidence: 70%

Stable Associations Masked by Temporal Variability in the Marine Copepod Microbiome

2015

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“…Predation by nanoplanktons is likely to decrease the abundance of AAP bacteria even further in addition to affecting its distribution (Sanders and Gast 2012;Hisatugo et al 2014;Batani et al 2016). Studies on grazing of AAP bacteria by various nanoflagellate and nanociliate in marine and freshwater ecosystems had shown a higher preference towards AAP bacteria compared to other bacterial communities (Unrein et al 2014;Garcia-Chaves et al 2015;Rocke et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Distribution and abundance of aerobic anoxygenic phototrophic bacteria in the tropical coastal waters of Gunungkidul, Yogyakarta, Indonesia

2020

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Abstract. Aprilyanto V, Sembiring L, Djohan TS. 2020. Distribution and abundance of aerobic anoxygenic phototrophic bacteria in the tropical coastal waters of Gunungkidul, Yogyakarta, Indonesia. Biodiversitas 21: 5506-5513. Aerobic anoxygenic phototroph (AAP) is a community of bacteria capable of performing anoxygenic photosynthesis in the presence of oxygen. AAP abundance in most oceanic regions signals its ecological importance in marine microbial loop. This study was conducted to reveal the distribution and abundance of AAP in Siung coast, Gunungkidul, Yogyakarta, Indonesia. Total bacterioplankton and AAP were enumerated using acridine orange direct count (AODC) and real-time quantitative PCR (qPCR), respectively. Several water physicochemical parameters as well as dissolved nitrate, ammonium, phosphate, and sulfate were also measured. The results showed that total bacterioplankton was distributed thoroughly in the water column with abundance ranging from 2.5×104 to 3.5×104 cells/mL. Within this total bacterioplankton, AAP ranged from 3.83×102 –7.48×102 cells/mL, comprising about 1% to ~2.5%. Inorganic nutrient concentration, mainly nitrate and phosphate were thought to be the regulating factors to the distribution and abundance of both communities. In conclusion, AAP comprises a relatively low portion of the total bacterioplankton community in the tropical coastal water in Gunungkidul, Yogyakarta.

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“…The genus Cyclidium is usually considered as an important bacterivorous ciliate in grazing studies with fluorescent microspheres [49]. Species from this genus have the ability to selectively ingest particles or natural bacterioplankton, mainly affecting bacteria with volumes of between 0.04 and 0.1 μm 3 , and even discriminate between particles of similar sizes based on their surface chemistry [50].…”

Section: Discussionmentioning

confidence: 99%

Contaminating microzooplankton in outdoor microalgal mass culture systems: An ecological viewpoint

Wang

Yuan

et al. 2016

Algal Research

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Ingestion of bacteria in a eutrophic subtropical reservoir pond with food web mainly controlled by zooplankton grazing

Cited by 10 publications

References 36 publications

Stable Associations Masked by Temporal Variability in the Marine Copepod Microbiome

Stable Associations Masked by Temporal Variability in the Marine Copepod Microbiome

Distribution and abundance of aerobic anoxygenic phototrophic bacteria in the tropical coastal waters of Gunungkidul, Yogyakarta, Indonesia

Contaminating microzooplankton in outdoor microalgal mass culture systems: An ecological viewpoint

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