Morphological and Ribosomal <scp>DNA</scp>‐based Characterization of Six Antarctic Ciliate Morphospecies from the Amundsen Sea with Phylogenetic Analyses

Kim, Sun Young; Choi, Joong Ki; Dolan, John R.; Shin, Hyoung Chul; Lee, Sanghoon; Yang, Eun Jin

doi:10.1111/jeu.12057

Cited by 30 publications

(28 citation statements)

References 48 publications

(103 reference statements)

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“…Among these suspected polymorphs are Parafavella spp (Burkovsky 1973;Davis 1978) of which five are reported here (see Supplementary data file). The phenomenon of cryptic species in tintinnids (that is, Santoferrara et al, 2015) may be less common compared with polymorphism as there are species known to display different lorica morphologies, but of the same LOD, previously described as different species and/or genera (that is, Laval-Peuto, 1983; Kim et al, 2013;Bachy et al, 2012). At present it is not clear which phenomenon is more common.…”

Section: Resultsmentioning

confidence: 98%

Declines in both redundant and trace species characterize the latitudinal diversity gradient in tintinnid ciliates

et al. 2016

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The latitudinal diversity gradient is a well-known biogeographic pattern. However, rarely considered is how a cline in species richness may be reflected in the characteristics of species assemblages. Fewer species may equal fewer distinct ecological types, or declines in redundancy (species functionally similar to one another) or fewer trace species, those occurring in very low concentrations. We focused on tintinnid ciliates of the microzooplankton in which the ciliate cell is housed inside a species-specific lorica or shell. The size of lorica oral aperture, the lorica oral diameter (LOD), is correlated with a preferred prey size and maximum growth rate. Consequently, species of a distinct LOD are distinct in key ecologic characteristics, whereas those of a similar LOD are functionally similar or redundant species. We sampled from East Sea/Sea of Japan to the High Arctic Sea. We determined abundance distributions of biological species and also ecological types by grouping species in LOD size-classes, sets of ecologically similar species. In lower latitudes there are more trace species, more size-classes and the dominant species are accompanied by many apparently ecologically similar species, presumably able to replace the dominant species, at least with regard to the size of prey exploited. Such redundancy appears to decline markedly with latitude in assemblages of tintinnid ciliates. Furthermore, the relatively small species pools of the northern high latitude assemblages suggest a low capacity to adapt to changing conditions.

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Section: Resultsmentioning

confidence: 98%

Declines in both redundant and trace species characterize the latitudinal diversity gradient in tintinnid ciliates

et al. 2016

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“…Although oceanographic surveys have been conducted in the Amundsen Sea, ecological studies of plankton have concentrated on primary production, ciliates, mesozooplankton, and krill Fragoso and Smith, 2012;Lee et al, 2012Lee et al, , 2013. Three studies on ciliates have focused on the species composition, morphology, and phylogeny of ciliates Kim et al, 2013;Jiang et al, 2014).…”

Section: Introductionmentioning

confidence: 98%

Microzooplankton herbivory and community structure in the Amundsen Sea, Antarctica

Yang

Jiang

Lee

2016

Deep Sea Research Part II: Topical Studies in Oceanography

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“…Species of certain tintinnid genera are known to display different lorica morphologies (e.g. Laval-Peuto 1983;Bachy et al 2013;Kim et al 2013;Santoferrara et al 2015). However, only a few of the species encountered in this study appeared variable and may or may not represent single species (e.g.…”

Section: Sampling and Sample Analysismentioning

confidence: 82%

Community Structure of Tintinnid Ciliates of the Microzooplankton in the South West Pacific Ocean: Comparison of a High Primary Productivity with a Typical Oligotrophic Site

Dolan

Gimenez

Cornet-Barthaux

et al. 2016

J Eukaryotic Microbiology

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Transient 'hot spots' of phytoplankton productivity occur in the generally oligotrophic Southern Pacific Ocean and we hypothesized that the population structure of tintinnid ciliates, planktonic grazers, would differ from that of a typical oligotrophic sites. Samples were collected over a 1-wk period at each of two sites between Fiji and Tahiti: one of elevated chlorophyll a concentrations and primary productivity with an abundance of N-fixing cyanobacteria Trichodesmium, and a distant oligotrophic site. Tintinnid abundance differed between the sites by a factor of 2. A single species (Favella sp.), absent from the oligotrophic site, highly dominated the 'hot spot' site. However, total species richness was identical (71 spp.) as well as short-term temporal variability (2-4 d). At both sites, species abundance distributions most closely fit a log-series or log-normal distribution and the abundance distributions of ecological types, forms of distinct lorica oral diameter, were the typical geometric. Morphological diversity was only slightly lower at the high productivity site. We found that communities of these plankton grazers in 'hot spots' of phytoplankton productivity in oligotrophic systems, although harboring different species, differ little from surrounding oligotrophic areas in community structure.

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Morphological and Ribosomal DNA‐based Characterization of Six Antarctic Ciliate Morphospecies from the Amundsen Sea with Phylogenetic Analyses

Cited by 30 publications

References 48 publications

Declines in both redundant and trace species characterize the latitudinal diversity gradient in tintinnid ciliates

Declines in both redundant and trace species characterize the latitudinal diversity gradient in tintinnid ciliates

Microzooplankton herbivory and community structure in the Amundsen Sea, Antarctica

Community Structure of Tintinnid Ciliates of the Microzooplankton in the South West Pacific Ocean: Comparison of a High Primary Productivity with a Typical Oligotrophic Site

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