The coupling of oligotrich ciliate populations and hydrography in the East China Sea: spatial and temporal variations

Chiang, Kuo‐Ping; Lin, Chiu-Yi; Lee, Chung-Hsien; Shiah, Fuh‐Kwo; Chang, Jeng Kuei

doi:10.1016/s0967-0645(03)00023-7

Cited by 34 publications

(27 citation statements)

References 31 publications

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“…Jiang et al (2011) found a total of 64 ciliate taxa in Jiaozhou Bay, northern China. The high ciliate species richness found in this study may be due to the conditions prevailing along the coastline of the Gulf of Gabes, which differ from those in the oceanic region (Chiang et al, 2003). The ciliate taxa increased significantly at the northern station but decreased at the southern one (Fig.…”

Section: Composition Of the Ciliate Communitymentioning

confidence: 62%

Space-time variation of ciliates related to environmental factors in 15 nearshore stations of the Gulf of Gabes

et al. 2014

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Diversity and structure of ciliate communities in the Gulf of Gabes (Tunisia) were investigated based on a survey of 15 nearshore stations along 237 Km, by monthly sampling over a year. Ciliated protozoa were identified to genus and/or species level and enumerated. Statistic tools were used to explain ciliate assemblage. High ciliate species richness from 63 taxa was recorded, including new records of several species. This study showed a longitudinal distribution of ciliate communities, which are organized at northern (from Tabia to Port of Gabes) and southern stations (from Zarrat to Jabiat Haj Ali). The number of taxa increased significantly at northern stations but decreased at the southern ones. This distribution was mainly influenced by salinity and phytoplankton abundance. Ciliate taxa were grouped into five size-classes: 15-30 µm, 30-50 µm, 50-100 µm, 100-200 µm and >200 µm. In terms of abundance, most abundant size groups were small ciliates (15-30 μm), accounting for 15 to 79 %, while the greatest biomass contribution came from the 50-100 μm size classes. Thus, we conclude that there is a high diversity of ciliate communities with a geographical distribution that is influenced by abiotic and biotic factors along the coast of the Gulf of Gabes.

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Section: Composition Of the Ciliate Communitymentioning

confidence: 62%

Space-time variation of ciliates related to environmental factors in 15 nearshore stations of the Gulf of Gabes

et al. 2014

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“…The eucaryal OTUs included Halteria sp. bLaN2 (98.5% identity) and the abundance of such ciliates has been shown to correspond to summertime runoff of nutrients, with this marine species involved in the incorporation of particulate and dissolved organic carbon into the food web55. Alphaproteobacteria and Gammaproteobacteria are almost entirely absent from Atlas Pool.…”

Section: Discussionmentioning

confidence: 99%

Microbial communities of aquatic environments on Heard Island characterized by pyrotag sequencing and environmental data

Allen

Cavicchioli

2017

Sci Rep

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Heard Island in the Southern Ocean is a biological hotspot that is suffering the effects of climate change. Significant glacier retreat has generated proglacial lagoons, some of which are open to the ocean. We used pyrotag sequencing of SSU rRNA genes and environmental data to characterize microorganisms from two pools adjacent to animal breeding areas, two glacial lagoons and Atlas Cove (marine site). The more abundant taxa included Actinobacteria, Bacteroidetes and Proteobacteria, ciliates and picoflagellates (e.g. Micromonas), and relatively few Archaea. Seal Pool, which is rich in organic matter, was characterized by a heterotrophic degradative community, while the less eutrophic Atlas Pool had more eucaryotic primary producers. Brown Lagoon, with the lowest nutrient levels, had Eucarya and Bacteria predicted to be oligotrophs, possess small cell sizes, and have the ability to metabolize organic matter. The marine influence on Winston Lagoon was evident by its salinity and the abundance of marine-like Gammaproteobacteria, while also lacking typical marine eucaryotes indicating the system was still functioning as a distinct niche. This is the first microbiology study of Heard Island and revealed that communities are distinct at each location and heavily influenced by local environmental factors.

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“…Samples for protozoa (i.e., autotrophic and heterotrophic nanoflagellates as well as ciliate) were fixed with neutralized formalin, and identified and counted using an inverted epifluorescence microscope at 200 × or 400 × magnification [ Chiang et al , 2003]. The cellular carbon of nanoflagellates was converted using a factor of 4.7 × 10 −12 g C cell −1 [ Charpy and Blanchot , 1998], and values were calculated for ciliates assuming standard geometric shapes and a conversion factor of 190 × 10 −15 g C μ m −3 [ Putt and Stoecker , 1989].…”

Section: Methodsmentioning

confidence: 99%

“…The Changjiang River plume (CDW) contains some of the most productive planktonic communities in the ECS, characterized by high abundances of phytoplankton, bacterioplankton, and protozooplankton [ Chiang et al , 2003; Gao and Song , 2005; Wang , 2006]. During summer, high rates of plankton primary production and community respiration dominate biological activity in the CDW regulating the regional carbon balance [ Chen et al , 2006; Gong and Liu , 2003].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Changjiang (Yangtze) River discharge on planktonic community respiration in the East China Sea

et al. 2009

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[1] Planktonic communities tend to flourish on the western margins of the East China Sea (ECS) fueled by substrates delivered largely from the Changjiang River, the fifth largest river in the world. To study the effects of the Changjiang River discharge on planktonic community respiration (CR), physical-chemical variables and key processes were measured in three consecutive summers in the ECS. Results showed that concentrations of nitrate and Chl a, protozoan biomass, bacterial production, as well as CR in the surface water were all negatively correlated with sea surface salinity, reflecting the strong influence of river discharge on the ECS shelf ecosystem. Moreover, mean values of nitrate, Chl a concentrations, and CR rates were proportionally related to the area of Changjiang diluted water (CDW; salinity 31.0 practical salinity units (psu)), an index of river discharge rate. Presumably, higher river flow delivers higher nutrient concentrations which stimulate phytoplankton growth, which in turn fuels CR. CR exhibited significant monthly and interannual variability, and rates appear to be dominated by bacteria and phytoplankton. Although the plankton community was relatively productive (mean = 0.8 mg C m À2 d À1) in the CDW, the mean ratio of production to respiration was low (0.42). This suggests that the heterotrophic processes regulating CR were supported by riverine organic carbon input in addition to in situ autotrophic production.

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The coupling of oligotrich ciliate populations and hydrography in the East China Sea: spatial and temporal variations

Cited by 34 publications

References 31 publications

Space-time variation of ciliates related to environmental factors in 15 nearshore stations of the Gulf of Gabes

Space-time variation of ciliates related to environmental factors in 15 nearshore stations of the Gulf of Gabes

Microbial communities of aquatic environments on Heard Island characterized by pyrotag sequencing and environmental data

Effects of the Changjiang (Yangtze) River discharge on planktonic community respiration in the East China Sea

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