Evaluation of bacterivory of Rotifera based on measurements of <i>in situ</i> ingestion of fluorescent particles, including some comparisons with Cladocera

Ooms-Wilms, A. L.; Postema, G.; Gulati, R. D.

doi:10.1093/plankt/17.5.1057

Cited by 40 publications

(25 citation statements)

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“…Bacterivory has oeen reported in rotifers (Sacders et al 1989, Ooms-Wilms et al 1995, cladocera (Vaque et al 1992, Burns & Schallenberg 1996, and in copepod nauplii (Roff et al 1995). Some metazoa from Saginaw Bay contained ingested FLB in Expt 4 (Table 3).…”

Section: Direct Effect: Grazing Mortality In Nitrifiersmentioning

confidence: 93%

Cascading trophic effects on aquatic nitrification: experimental evidence and potential implications

Lavrentyev¹,

Gardner²,

Johnson³

1997

Aquat. Microb. Ecol.

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Experiments, using natural plankton collected from a eutrophic site in Saginaw Bay, Lake Huron (USA) and from a hypereutrophic wetland of southern Lake Erie (USA), were conducted to test the hypothesis that bacterivory can control aquatic nitnfication rates. The dynamics of nitrogen and protists in these experiments revealed a consistent pattern: an increase in concentrations of nitrates due to oxidation of NH,' always followed the collapse of bacterivorous nanoplankton populations. This collapse was, in turn, caused by predation pressure of larger ciliates and metazooplankton. Experiments, using enrichment batch cultures maintained at near-ambient concentrations of NH,', indicated that bacterivorous protists can inhibit nitnfication directly by reducing bacterial numbers and indirectly by promoting bacterial aggregation. The latter experiments also suggest that feeding strategies of microbial grazers, e.g. suspension-feeding Spumella sp. versus surface-feeding Bodo saltans, may determine their grazing impacts on nitrifiers. Finally, ingestion rates of fluorescently labeled nitrifying bacteria (FLNB) by the natural planktonic assemblage from Saginaw Bay demonstrated that nanoflagellates were able to efficiently prey on low concentrations of FLNB. Our study suggests that previously neglected trophic factors may be of potential importance for mediating nitrification rates in the pelagic environment.

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Section: Direct Effect: Grazing Mortality In Nitrifiersmentioning

confidence: 93%

Cascading trophic effects on aquatic nitrification: experimental evidence and potential implications

Lavrentyev¹,

Gardner²,

Johnson³

1997

Aquat. Microb. Ecol.

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“…Results from feeding studies with polymer spheres illustrate that several protozoans feed effectively on 0.5 μm particles [9]; several rotifers on 0.5, 3, and 6 μm particles [19]; and cladocerans on 0.5, 3, 6, 10, and 20 μm particles ( [13], Table 1). In comparison, calanoid copepods are macrofiltrators and ingest particles >2.1 μm but not 0.5 μm particles (e.g., [10], Fig.…”

Section: Size and Shapementioning

confidence: 99%

Interactions of Microplastics with Freshwater Biota

Scherer

Weber

Lambert

et al. 2017

The Handbook of Environmental Chemistry

106

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The ubiquitous detection of microplastics in aquatic ecosystems promotes the concern for adverse impacts on freshwater ecosystems. The wide variety of material types, sizes, shapes, and physicochemical properties renders interactions with biota via multiple pathways probable.So far, our knowledge about the uptake and biological effects of microplastics comes from laboratory studies, applying simplified exposure regimes (e.g., one polymer and size, spherical shape, high concentrations) often with limited environmental relevance. However, the available data illustrates species-and materialrelated interactions and highlights that microplastics represent a multifaceted stressor. Particle-related toxicities will be driven by polymer type, size, and shape. Chemical toxicity is driven by the adsorption-desorption kinetics of additives and pollutants. In addition, microbial colonization, the formation of heteroaggregates, and the evolutionary adaptations of the biological receptor further increase the complexity of microplastics as stressors. Therefore, the aim of this chapter is to synthesize and critically revisit these aspects based on the state of the science in freshwater research. Where unavailable we supplement this with data on marine biota. This provides an insight into the direction of future research.In this regard, the challenge is to understand the complex interactions of biota and plastic materials and to identify the toxicologically most relevant characteristics of the plethora of microplastics. Importantly, as the direct biological impacts of This chapter has been externally peer reviewed.

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“…Studies have also shown that cladocerans' fine mesh filtering apparatus allows them to feed on small protozoa and the microbial flora of aquatic environments or feed on bacteria associated with algae (Geller and Müller 1981;Ooms-Wilms et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Life history and DNA barcode of Oxyurella longicaudis (Birgei, 1910) (Cladocera, Anomopoda, Chydoridae)

et al. 2015

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Background: Cladocera is an important group of freshwater zooplankton, and the species plays an important role in energy transfer and in aquatic food webs. Oxyurella longicaudis is a Chydoridae species that has been recorded in North and South America. The aim of this study is to investigate the life cycle aspects of parthenogenetic females of O. longicaudis cultured in laboratory under controlled conditions: temperature (23°C ± 05°C), photoperiod (12 h light/12 h dark), food supply, and reconstituted water. Results: Embryonic development duration (2.3 ± 0.5 days), post-embryonic development (5.2 ± 0.69 days), mean fecundity (two eggs female −1 brood

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Evaluation of bacterivory of Rotifera based on measurements of in situ ingestion of fluorescent particles, including some comparisons with Cladocera

Cited by 40 publications

References 0 publications

Cascading trophic effects on aquatic nitrification: experimental evidence and potential implications

Cascading trophic effects on aquatic nitrification: experimental evidence and potential implications

Interactions of Microplastics with Freshwater Biota

Life history and DNA barcode of Oxyurella longicaudis (Birgei, 1910) (Cladocera, Anomopoda, Chydoridae)

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