Speciation of the tintinnid genus Cymatocylis by morphometric analysis of the loricae

Williams, Rebecca M.; McCall, H.; Pierce, RW; Turner, J. A.

doi:10.3354/meps107263

Cited by 29 publications

(23 citation statements)

References 7 publications

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“…Species of certain genera are known to be capable of displaying different lorica morphologies (e.g., Gold and Morales, 1976;Davis, 1981;Laval-Peuto, 1983;Wasik, 1988;Williams et al, 1994). We adopted a what we term a 'conservative' approach, that is pooling apparent varieties.…”

Section: Tintinnid Sampling and Sample Analysismentioning

confidence: 99%

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The "neutral" community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

2007

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Abstract.We assessed the community characteristics of a group of planktonic herbivores across a species-rich area, the SE Pacific Ocean. A series of 22 stations between the Marquise Islands (7 • S 142 • W) and the coast of Chile (35 • S 73 • W) was sampled during the BIOSOPE cruise in 2004. We examined the relationships between taxonomic diversity, morphological diversity, patterns of tintinnid species assemblage, and phytoplankton abundance. Tintinnid community characteristics were estimated from large volume (20-60 l) discrete depth sampling and phytoplankton were characterized based on HPLC pigment signatures. Across the transect, average water column concentrations of tintinnids ranged from 2-40 cells l −1 or 8-40 ng C l −1 , and were positively related to chlorophyll a concentrations which varied between 0.07-2 µg l −1 . Large numbers of tintinnid taxa were found, 18-41 species per station, yielding a total of 149 species. Among stations, morphological and taxonomic diversity metrics co-varied but were not significantly related to phytoplankton diversity estimated using a pigment-based size-diversity metric. Taxonomic diversity of tintinnids, as H' or Fishers' alpha, was inversely related to chlorophyll concentration and positively to the depth of the chlorophyll maximum layer. Species abundance distributions were compared to geometric, log-series and log-normal distributions. For most stations, the observed distribution most closely matched log-series, coherent with the neutral theory of random colonization from a large species pool. Occurrence rates of species were correlated with average abundance rather than specific characteristics of biomass or lorica oral diameter (mouth) size. Among stations, species richness was corCorrespondence to: J. Dolan (dolan@obs-vlfr.fr) related with both the variety of mouth sizes (lorica oral diameters) as well as numbers of species per mouth size, also consistent with random colonization.

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Section: Tintinnid Sampling and Sample Analysismentioning

confidence: 99%

“…However, species in some genera are known to be polymorphic (e.g. Laval-Peuto, 1983;Williams et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

The "neutral" community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

2007

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“…Tintinnids were identified on the basis of lorica morphology using the classical taxonomic references (Brandt 1907;Laackmann 1910;Kofoid & Campbell 1929, 1939 and new taxonomic works (Cosper 1972;Davis 1979Davis , 1981Davis , 1985Hedin 1974;Sassi & Melo 1986;Gold & Morales 1975;Williams et al 1994;Fernandes 1999;Kršinić 2010).…”

Section: Taxonomic Considerationmentioning

confidence: 99%

“…5c) and P. acuta ( More than 40 species of the genus Cymatocylis were found in the Antarctic area by Kofoid & Campbell (1929), and 8 species with 14 forms were found by Alder (1999). Therefore, numerous investigations have focused on this genus (Balech 1973;Sassi et al 1986;Boltovskoy et al 1990;Williams et al 1994;Culverhouse et al 1994;Wasik 1998;Fernandes 1999). However I was noted only one species, C. convallaria Laackmann 1910.…”

Section: Taxonomic Considerationmentioning

confidence: 99%

Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V “Croatian Tern”

Kršinić

2018

Zootaxa

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An investigation of large tintinnids was carried out during the Arctic-Antarctic cruise aboard the S/V "Croatian Tern" in the period from 1994 to 1997. Samples were collected at 33 stations by vertical tows with a Nansen net with a 53 µm mesh size in the Mediterranean Sea, North Atlantic, Labrador Sea, Baffin Bay, the Beaufort, Chukchi and Bering Seas, East North Pacific, South Pacific, South East Pacific, Scotia Sea, and South West Atlantic. A total of 47 species of tintinnids were found, with the greatest diversity in the Tropical areas of the Pacific, Arctic and Subarctic. A very high total abundance was registered in the Bering Sea of 247,393 ind.m -3 and in the South-eastern Pacific of 66,211 ind.m -3 . The dominant species in the northern areas was Ptychocylis obtusa and in the southern areas Eutintinnus rugosus.

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“…Whereas multivariate statistical approaches have been used (Demers et al 1992;Carr et al 1996), and can be very successful if the appropriate technique can be found, this is often not simple, and invalid assumptions about distributions can cause major problems. Artificial neural networks (ANNs) on the other hand, do not require a-priori knowledge of underlying distributions, once trained they can make identifications in near real-time and have been shown to have considerable potential for identifying phytoplankton from AFC data (e.g., Frankel et al, 1989Frankel et al, , 1996Boddy et al, 1994;Wilkins et al, 1994Wilkins et al, , 1996 and from morphometric data (e.g., Culverhouse et al, 1994Culverhouse et al, , 1996Williams et al, 1994). Species identification is not always possible based on light scatter and fluorescence characteristics, due either to similarities in the optical characteristics between species or to certain species having a wide range of optical characteristics, such as with clumped cells or chains.…”

Section: Introductionmentioning

confidence: 99%

Automated identification and characterisation of microbial populations using flow cytometry: the AIMS project

Jonker¹,

Groben²,

Tarran³

et al. 2000

Sci. Mar.

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SUMMARY: The AIMS (Automatic Identification and characterisation of Microbial populationS) project is developing and integrating flow cytometric technology for the identification of microbial cell populations and the determination of their cellular characteristics. This involves applying neural network approaches and molecular probes to the identification of cell populations, and deriving and verifying algorithms for assessing the chemical, optical and morphometric characteristics of these populations. The products of AIMS will be calibrated data, protocols, algorithms and software designed to turn flow cytometric observations into a data matrix of the abundance and cellular characteristics of identifiable populations. This paper describes the general approach of the AIMS project, with details on the application of artificial neural nets and rRNA oligonucleotide probes.

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Speciation of the tintinnid genus Cymatocylis by morphometric analysis of the loricae

Cited by 29 publications

References 7 publications

The "neutral" community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

The "neutral" community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V “Croatian Tern”

Automated identification and characterisation of microbial populations using flow cytometry: the AIMS project

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Speciation of the tintinnid genus Cymatocylis by morphometric analysis of the loricae

Cited by 29 publications

References 7 publications

The &quot;neutral&quot; community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

The &quot;neutral&quot; community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V “Croatian Tern”

Automated identification and characterisation of microbial populations using flow cytometry: the AIMS project

Contact Info

Product

Resources

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The "neutral" community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean

The "neutral" community structure of planktonic herbivores, tintinnid ciliates of the microzooplankton, across the SE Tropical Pacific Ocean