Growth of interstitial ciliates in association with ciliate bacterivory in a sandy hyporheic zone

Cleven, Ernst‐Josef; Königs, Sascha

doi:10.3354/ame047177

Cited by 4 publications

(4 citation statements)

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“…It is ubiquitous and plays an important role in the microbial food web of the interstitial habitats (Bulit et al. ; Cleven and Koenigs ; Kalinowska ; Madoni ). To date, over 20 species have been reported.…”

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confidence: 99%

Morphology and Phylogeny of Three Pleuronema Species (Ciliophora, Scuticociliatia) from Hangzhou Bay, China, with Description of Two New Species, P. binucleatum n. sp. and P. parawiackowskii n. sp.

Pan

Juxiang

Jiang

et al. 2015

J Eukaryotic Microbiology

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The morphology and phylogeny of Pleuronema binucleatum n. sp., P. parawiackowskii n. sp., and P. marinum Dujardin 1841, collected from Hangzhou Bay estuary, China, were investigated using standard methods. Pleuronema binucleatum n. sp. can be identified by possessing about 90-120 × 35-50 μm cell size in vivo, reniform body outline, two macronuclei, six to eight preoral kineties, 32-41 somatic kineties, and posterior end of the anterior fragment of membranelle 2 (M2a) hook-like. Pleuronema parawiackowskii n. sp. is characterized by the combination of the following characters: body size about 60-90 × 20-40 μm in vivo, elliptical in outline, four to eight preoral kineties, 20-29 somatic kineties, posterior portion of the M2a slightly curved but nonhooked, and single macronucleus sausage-like. After comparison with other populations of P. marinum, it is suggested that many misidentifications exist in previous studies. And an improved diagnosis of P. marinum was supplied: cell about 95-180 μm long, elliptical in outline; 2-4 preoral kineties and 53-70 somatic kineties; both membranelle 1 and membranelle 3 three-rowed; posterior end of the M2a straight; single contractile vacuole characteristically positioned near mid-body. The small subunit rRNA genes of three forms were sequenced. Phylogenetic analyses indicate that the monophyly of the genus Pleuronema is still not supported.

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confidence: 99%

Morphology and Phylogeny of Three Pleuronema Species (Ciliophora, Scuticociliatia) from Hangzhou Bay, China, with Description of Two New Species, P. binucleatum n. sp. and P. parawiackowskii n. sp.

Pan

Juxiang

Jiang

et al. 2015

J Eukaryotic Microbiology

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“…Some scuticociliates are well known for their facultative parasitism and cause serious diseases of aquatic organisms [ 8 , 9 , 10 , 11 ]. Actually, most ciliates assigned to this subclass are free-living with significant ecological functions regarding their nutrition style, behavior, and many other biological characteristics [ 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Taxonomic and Phylogenetic Studies of Two Brackish Pleuronema Species (Protista, Ciliophora, Scuticociliatia) from Subtropical Coastal Waters of China, with Report of a New Species

Zhang,

Zhao,

et al. 2023

Microorganisms

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The genus Pleuronema Dujardin, 1841, with nearly 40 morphospecies, is one of the largest genera in the well-known subclass Scuticociliatia. In the present study, two Pleuronema species were collected from subtropical coastal waters of the East China Sea. The morphology and molecular phylogeny were investigated using modern standard methods. Pleuronema ningboensis n. sp. is mainly characterized by an elliptical body in outline with the right ventrolateral side straight, 16–22 somatic kineties, 3–5 preoral kineties, and the posterior end of the membranelle 2a hook-like. An improved diagnosis of Pleuronema orientale Pan et al., 2015 was provided: body size in vivo usually 90–135 × 45–85 μm, right ventrolateral side convex, 36–51 somatic kineties, 1–5 preoral kineties, one to three spherical macronuclei, membranelle 2a arranged in a zig-zag pattern in middle portion, posterior region hook-like, both membranelle 1 and membranelle 3 composed of three rows of basal bodies. The small subunit ribosomal DNA (SSU rDNA) of two species is sequenced, and their molecular phylogeny is analyzed. The new species Pleuronema ningboensis n. sp. clusters with P. grolierei KF840519, P. setigerum JX310015, P. paucisaetosum KF206430, and P. cf. setigerum KF848875, basically in accord with the morphological characteristics.

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“…Protists and prokaryotes are crucial organisms involved in the cycling of matter and the biological carbon pump (Stocker 2012;Caron & Hutchins 2013;Mitra et al 2014). To estimate their role in matter turnover, not only their biomass but also their growth rates have to be measured (Müller 1989;Leakey et al 1992;Cleven & Königs 2007;Lai et al 2014). ere are direct, reliable methods to measure algal (that of autotrophic protists) and bacterial production under natural conditions, but assessment of protozoan production (that of heterotrophic protists) is much more di cult (Rychert 2013).…”

Section: Introductionmentioning

confidence: 99%

“…ciliates) that feed on prey smaller than 10 μm (nano agellates, small algae, or bacteria). Modi cations of the dilution method (Landry & Hassett 1982) were previously applied to measure the growth rates of pelagic heterotrophic nano agellates (Landry et al 1984;Berglund et al 2005;Dupuy et al 2007) and interstitial ciliates (Cleven & Königs 2007).…”

Section: Introductionmentioning

confidence: 99%

Growth rates of common pelagic ciliates in a highly eutrophic lake measured with a modified dilution method

Rychert

2016

Oceanological and Hydrobiological Studies

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The growth rates of ciliates estimated under natural conditions with the widely used size fractionation method are much lower than those observed in cultures. However, recent studies performed with a modified dilution method demonstrated that the size fractionation method underestimates the ciliate growth, because it does not remove predators of the same size as the organisms studied. Thus, it is still unresolved whether ciliates are food-limited in different systems and whether their growth rates are indeed lower than those in cultures. This study was conducted in highly eutrophic Lake Gardno using a modified dilution method. Each time, two dilution experiments were performed (around noon and around midnight). Four small, common ciliates from the genera

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Growth of interstitial ciliates in association with ciliate bacterivory in a sandy hyporheic zone

Cited by 4 publications

References 51 publications

Morphology and Phylogeny of Three Pleuronema Species (Ciliophora, Scuticociliatia) from Hangzhou Bay, China, with Description of Two New Species, P. binucleatum n. sp. and P. parawiackowskii n. sp.

Morphology and Phylogeny of Three Pleuronema Species (Ciliophora, Scuticociliatia) from Hangzhou Bay, China, with Description of Two New Species, P. binucleatum n. sp. and P. parawiackowskii n. sp.

Taxonomic and Phylogenetic Studies of Two Brackish Pleuronema Species (Protista, Ciliophora, Scuticociliatia) from Subtropical Coastal Waters of China, with Report of a New Species

Growth rates of common pelagic ciliates in a highly eutrophic lake measured with a modified dilution method

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