Horizontal distribution of psammophilic ciliates in fine sediments of the Chichester Harbour area

Carey, Philip G.; Maeda, Masachika

doi:10.1080/00222938500770341

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…In some cases, however, good identifications to species can be made based on unique morphological characters, behaviours, etc., without resort to these techniques (e.g. Carey & Maeda, 1985 ;Maeda, 1986). For example, the oligotrich Laboea strobila is the only described species in its genus (Corliss, 1979) and has both a unique spiral winding of the girdle around the posterior of the cell and the habit of retaining chloroplasts from ingested algae (McManus & Fuhrman, 1986).…”

Section: Methodsmentioning

confidence: 99%

Insights into the diversity of choreotrich and oligotrich ciliates (Class: Spirotrichea) based on genealogical analyses of multiple loci.

Snoeyenbos-West¹,

Salcedo²,

McManus³

et al. 2002

International Journal of Systematic and Evolutionary Microbiology

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To examine relationships among spirotrich ciliates using multi-locus sequence analyses and to provide preliminary insights into molecular diversity within species, we sequenced the small subunit rDNA (SSU rDNA), 5.8S rDNA, alpha-tubulin and the internally transcribed spacer regions (ITS1 and ITS2) of the rDNA genes from seven choreotrich (Class: Spirotrichea) and three oligotrich (Class: Spirotrichea) taxa. Genealogies constructed from SSU rDNA and ITS sequences are concordant and broadly support current classifications based on morphology. The one exception is the freshwater oligotrich Halteria grandinella, which, as has been previously noted, falls outside of the clade containing the other oligotrichs. In contrast, analyses of alpha-tubulin sequences are discordant with traditional taxonomy and rDNA genealogies. These analyses also indicate that considerably more genetic variation exists among choreotrich and oligotrich genera than among stichotrich genera. To explore the level of genetic variation among individuals in temporally isolated populations, we collected additional samples of a subset of planktonic choreotrichs and oligotrichs and characterized polymorphisms in ITS1, ITS2 and 5.8S rDNA. Analyses of these data indicate that, at least for some ciliate lineages, DNA polymorphisms vary temporally, and that genetic heterogeneity underlies some very similar morphological types.

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Section: Methodsmentioning

confidence: 99%

Insights into the diversity of choreotrich and oligotrich ciliates (Class: Spirotrichea) based on genealogical analyses of multiple loci.

Snoeyenbos-West¹,

Salcedo²,

McManus³

et al. 2002

International Journal of Systematic and Evolutionary Microbiology

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“…with bacterial populations, metazoans). Among the di¡erent protozoan groups, ciliates belonging to the interstitial fauna have received considerable attention (Dragesco, 1953(Dragesco, , 1960(Dragesco, , 1963Fenchel, 1969;Hartwig, 1980;Carey & Maeda, 1985). The biology of other protozoan groups living in the same environments is important, as these organisms can be present in greater abundance than ciliates.…”

Section: Introductionmentioning

confidence: 99%

Protozoan species in three epibenthic areas of the Cantabrian Sea: relations with environmental factors

Fernández-Leborans

2000

J. Mar. Biol. Ass.

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Protozoan communities at three beaches on the Cantabrian Sea were studied. Four stations along a transect of 150 m at each beach were chosen for this study. The following parameters were measured: temperature, pH, oxidation–reduction potential, dissolved oxygen, conductivity, salinity, nitrate, phosphate, granulometry and amount of organic matter. Four groups of protozoa (ciliates, non-dinoflagellate flagellates, dinoflagellates and sarcodines) were analysed for their abundance and diversity, as well as the influence of the measured parameters on the communities. Temperature, pH, and dissolved oxygen were the main factors responsible for seasonal differences. Temperature increased at the beginning of spring and summer, coinciding with growth of the protozoan community. Flagellates and dinoflagellates increased during spring and early summer. The amount of organic matter subsequently rose. The final step of this succession was the development of the ciliate community. A comparison between the same areas in 1989 and in the present study was carried out.

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“…There are numerous reports concerning the abundance and dynamics of the different groups of protists present in marine zones. Among these are publications that consider organisms of superficial waters near to the shore and those that are found in sub-littoral sediments (LACKEY & LACKEY, 1963;FENCHEL, 1967;HARTWIG, 1980;SAWYER, 1980;SAWYER & BODAMMER, 1983;PARKER, 1983;CAREY & MAEDA, 1985; ANDERSEN B SORENSEN, 1986;SHERR er al.. 1986;WRIGHT er al., 1987). A great diversity and abundance of protist species is generally found in shallow coastal waters (BARTSCH & HARTWIG, 1984;HARTWIG, 1980;FENCHEL, 1987).…”

Section: Introductionmentioning

confidence: 99%

Sublittoral Protistan Communities of the Shores of the Sea of Cantabria (Bay of Biscay)

Fernández-Leborans

Novillo

1993

Intl Review of Hydrobiology

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Horizontal distribution of psammophilic ciliates in fine sediments of the Chichester Harbour area

Cited by 7 publications

References 23 publications

Insights into the diversity of choreotrich and oligotrich ciliates (Class: Spirotrichea) based on genealogical analyses of multiple loci.

Insights into the diversity of choreotrich and oligotrich ciliates (Class: Spirotrichea) based on genealogical analyses of multiple loci.

Protozoan species in three epibenthic areas of the Cantabrian Sea: relations with environmental factors

Sublittoral Protistan Communities of the Shores of the Sea of Cantabria (Bay of Biscay)

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