A survey of ciliates at the long-term sampling station “Helgoland Roads”, North Sea

Yang, Jinjuan; Löder, M. G. J.; Wiltshire, Karen Helen

doi:10.1007/s10152-014-0392-5

Cited by 11 publications

(5 citation statements)

References 62 publications

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“…Differences in the vertical distribution of plankton communities emerging from the present study confirmed what is known from previous years and studies (Revelante and Gilmartin, 1983;Dolan and Marrasé, 1995;Suzuki and Taniguchi, 1997;Elloumi et al, 2006;Dong et al, 2014;Yang et al, 2014;Yu et al, 2016;Tucker et al, 2017) and may therefore be considered quite typical of the ultraoligotrophic areas.…”

Section: Difference In Ciliate Dynamics and Correlations With Abiotic...supporting

confidence: 91%

Community dynamics and co-occurrence relationships of pelagic ciliates and their potential prey at a coastal and an offshore station in the ultra-oligotrophic Eastern Mediterranean Sea

2023

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Ciliates have been recognized as one of the major components of the microbial food web, especially in ultra-oligotrophic waters, such as the Eastern Mediterranean Sea, where nutrients are scarce and the microbial community is dominated by pico- and nano-sized organisms. For this reason, ciliates play an important role in these ecosystems since they are the main planktonic grazers. Regardless the importance of these organisms, little is known about the community structure of heterotrophic and mixotrophic ciliates and how they are associated to their potential prey. In this study, we used 18S V4 rRNA gene metabarcoding to analyze ciliate community dynamics and how the relationship with potential prey changes according to different seasons and depths. Samples were collected seasonally at two stations of the Eastern Mediterranean Sea (HCB: coastal, M3A: offshore) from the surface and deep chlorophyll maximum (DCM) layers. The ciliate community structure varied across depths in HCB and across seasons in M3A, and the network analysis showed that in both stations, mixotrophic oligotrichs were positively associated with diatoms and showed few negative associations with ASVs annotated as marine Stramenopiles (MAST). On the other hand, heterotrophic tintinnids showed negative relationships in both HCB and M3A stations, mostly with Ochrophyta and Chlorophyta. These results showed, in first place that, although the two stations are close to each other, the ciliate dynamics differed between them. Moreover, mixotrophic and heterotrophic ciliates may have different ecological niches since mixotrophic ciliates may be more selective compared to heterotrophic species regarding their prey. These findings are the first glimpse into an understanding of the dynamics between heterotrophic and mixotrophic ciliates and their role in microbial assemblages and dynamics of ultra-oligotrophic environments.

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Section: Difference In Ciliate Dynamics and Correlations With Abiotic...supporting

confidence: 91%

Community dynamics and co-occurrence relationships of pelagic ciliates and their potential prey at a coastal and an offshore station in the ultra-oligotrophic Eastern Mediterranean Sea

2023

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“…Despite the importance of PZP in planktonic food-webs, these organisms are largely ignored in monitoring programs (Stern et al, 2015). Except for a few plankton monitoring programs, such as in Chesapeake Bay, USA, from 1984USA, from -2001 (Coats and Revelante, 1999), the PZP community has been sampled with limited coverage either spatially (Löder et al, 2012;Yang et al, 2014), or temporally (Tillmann andHesse, 1998, Löder et al, 2012). Monitoring is also generally limited to productive seasons Coats, 1990, Edwards andBurkill, 1995) in temperate shelf seas or open ocean waters, such as the Pacific (Stoecker et al, 1996) and the Antarctic (Dolan et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Broad-scale distribution of the winter protozooplankton community in the North Sea

Bils¹,

Moyano²,

Aberle

et al. 2019

Journal of Sea Research

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Protozooplankton (PZP) (here size range: 12-200 µm) are rarely sampled over a broad scale, especially in ecosystem monitoring programs, despite their trophodynamic importance as grazers in the microbial loop and as prey for larger zooplankton and early life stages of fish. In this study we sampled PZP from Dutch, French, German and Norwegian research vessels taking part in the annual ICES coordinated International Bottom Trawl Survey (IBTS) which provides data on fish stock abundances and status for the entire North Sea. The abundance, biomass, composition and distribution of PZP were examined at 39 stations across the North Sea (from 3.2°W to 7.6°E and 50.5 to 59.8°N) in midwinter (January-February 2014), a period of the year which is under-investigated so far. Twenty four taxa of dinoflagellates and ciliates were identified. Two groups comprised 89% of the total abundance of PZP: Gymnodinium spp. and other athecate dinoflagellates (68%) and Strombidium spp. and other naked ciliates (21%). The biomass of PZP at each station ranged between 0.08 and 2.4 µg C L-1 , which is much lower than that reported for spring or summer (≥100 µg C L-1) in the North Sea. Relatively small-sized (<40 µm) PZP contributed 46% of the total biomass. No significant spatial pattern in the composition of the PZP community was found, although the total abundance of tintinnids was highest in the southern North Sea, an important area for overwintering marine fish larvae. Using this fish survey (IBTS) as a sampling platform allowed us to obtain a synoptic view of the PZP community over a large area. The present collaborative

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“…Additionally, these regions are very heterogeneous for protists effecting together with community assembly processes a patchy distribution highly likely prone to undersampling. Previous data from our sampling regions indicate a pronounced seasonality in the ciliate community compositions (Mozetič et al, 1998;Witek, 1998;Gómez and Gorsky, 2003;Jiang et al, 2013;Yang et al, 2014). Despite the comparatively intensive sampling, however, only a small part of the pronounced seasonality with short abundance peaks and a rapid turnover of the dominating taxa could be caught.…”

Section: Motivations For Coastal Sites and Sampling Strategymentioning

confidence: 67%

Genetic Diversity in Marine Planktonic Ciliates (Alveolata, Ciliophora) Suggests Distinct Geographical Patterns – Data From Chinese and European Coastal Waters

et al. 2021

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Unraveling geographic distribution patterns of planktonic protists is a central goal in marine microbial ecology. Using a novel combination of recently developed phylogenetic and network analyses on a V4 18S rDNA metabarcoding dataset, we here analyzed the genetic diversity of marine planktonic ciliate communities in Chinese and European coastal waters. Thereby, our approach provided an unprecedented perspective on geographic patterns inferred from ciliate genetic diversity and accomplished a very fine resolution down to single nucleotides within operational taxonomic units (OTUs). While most OTUs (87%) exclusively contained sequences of either Chinese or European origin, those OTUs detected in both regions comprised the vast majority of reads (84%). Phylogenetic analyses of OTUs belonging to the same taxon revealed genetically distinct clades that were geographically restricted to either Chinese or European coastal waters. The detection of signature nucleotides emphasized this genetic distinction of Chinese and European clades. Second-level clustering of OTUs and reference sequences in two selected taxa (the oligotrichid Spirotontonia and the tintinnid Tintinnidium) revealed the presence of several potentially new species or ones lacking genetic reference data. Geographic patterns were also discovered by network analyses within 700 widespread and abundant OTUs; in 77 of these OTUs, European and Chinese sequences formed significantly assortative groups. These assortative groupings indicated a higher genetic similarity among sequences from the same region than between sequences from different regions. Our results demonstrate that detailed analyses of metabarcoding data down to single nucleotide differences expand our perception of geographical distribution patterns and provide insights into historic and ongoing effective dispersal in protists. The congruent discovery of geographic patterns at different levels of resolution (between and within OTUs) suggests that cosmopolitan distribution in marine planktonic ciliates is less common than previously postulated.

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A survey of ciliates at the long-term sampling station “Helgoland Roads”, North Sea

Cited by 11 publications

References 62 publications

Community dynamics and co-occurrence relationships of pelagic ciliates and their potential prey at a coastal and an offshore station in the ultra-oligotrophic Eastern Mediterranean Sea

Community dynamics and co-occurrence relationships of pelagic ciliates and their potential prey at a coastal and an offshore station in the ultra-oligotrophic Eastern Mediterranean Sea

Broad-scale distribution of the winter protozooplankton community in the North Sea

Genetic Diversity in Marine Planktonic Ciliates (Alveolata, Ciliophora) Suggests Distinct Geographical Patterns – Data From Chinese and European Coastal Waters

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