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Tian Xiao - One of the best experts on this subject based on the ideXlab platform.
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Dataset of long term variation in species occurrence and abundance of Tintinnid assemblages in Jiaozhou Bay, China.
Data in brief, 2018Co-Authors: Meiping Feng, Wuchang Zhang, Guangtao Zhang, Tian Xiao, Yuan Zhao, Chaofeng Wang, Chunsheng Wang, Weiding Wang, Bi YuanxinAbstract:Abstract This article contains supportive data related to a research article entitled “Annual variation of species richness and lorica oral diameter characteristics of Tintinnids in a semi-enclosed bay of western Pacific” (Feng et al., 2018) [1] . This article describes long term data of Tintinnid assemblages in Jiaozhou Bay, Yellow sea, a semi-enclosed basin ecosystem of western Pacific, from May 2003 to December 2012. We sum up the whole dataset for each year showing Tintinnid species occurrence and abundance at each site by date, as well as the photographic documentation of each Tintinnid species. Further interpretation and discussion can be found in recently published by Feng et al. in Estuarine, Coastal and Shelf Science at Science.
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Distribution of Different Biogeographical Tintinnids in Yellow Sea and Bohai Sea
Journal of Ocean University of China, 2018Co-Authors: Xue Chen, Wuchang Zhang, Yuan Zhao, Li Zhao, Yi Dong, Tian XiaoAbstract:There were different biogeographical Tintinnids in the oceans. Knowledge of their distribution pattern and mixing was important to the understanding of ecosystem functions. Yellow Sea (YS) and Bohai Sea (BS) were semi-enclosed seas influenced by warm water intrusion and YS cold bottom water. The occurrence of Tintinnids in YS and BS during two cruises (summer and winter) were investigated to find out: i) whether warm-water Tintinnids appeared in YS and BS; ii) whether boreal Tintinnids appeared in high summer; iii) the core area of neritic Tintinnids and iv) how these different biogeographical Tintinnids mixed. Our results showed that Tintinnid community was dominated by neritic Tintinnid. We confirmed the occurrence of warm-water Tintinnids in summer and winter. In summer, they intruded into BS and mainly distributed in the upper 20 m where Yellow Sea Surface Warm Water (YSSWW) developed. In winter, they were limited in the surface water of central deep region (bottom depth >50 m) of YS where were affected by Yellow Sea Warm Water (YSWW). Boreal Tintinnids occurred in YS in high summer (August) and in winter, while they were not observed in BS. In summer, the highest abundance of boreal Tintinnids occurred in Yellow Sea Bottom Cold Water, indicating the presence of an oversummering stock. In winter, they were concentrated in the north of YSWW. Vertically, neritic Tintinnids abundance was high in the bottom layers. Horizontally, high neritic Tintinnids abundance in bottom layers occurred along the 50 m isobath coinciding with the position of front systems. Front systems were the core distribution area of neritic Tintinnids. High abundance areas of warm-water and boreal Tintinnids were clearly separated vertically in summer, and horizontally in winter. High abundance of neritic Tintinnids rarely overlapped with that of warm-water or boreal Tintinnids.
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boreal Tintinnid assemblage in the northwest pacific and its connection with the japan sea in summer 2014
PLOS ONE, 2016Co-Authors: Wuchang Zhang, Shaoqing Wang, Guangtao Zhang, Tian XiaoAbstract:Tintinnids are planktonic ciliates that play an important role in marine ecosystem. According to their distribution in the world oceans, Tintinnid genera were divided into several biogeographical types such as boreal, warm water, austral and neritic. Therefore, the oceanic Tintinnid assemblage could be correspondingly divided into boreal assemblage, warm water assemblage and austral assemblage. The purpose of this study was to investigate the characteristics of boreal Tintinnid assemblage in the Northwest Pacific and the Arctic, and to identify the connection between boreal Tintinnid assemblage and neighboring assemblages. Surface water samples were collected along a transect from the East China Sea to the Chukchi Sea in summer 2014. According to the presence of boreal genera and warm water genera, three Tintinnid assemblages (the East China Sea neritic assemblage, the Japan Sea warm water assemblage, and the boreal assemblage) were identified along the transect. The boreal assemblage extended from the Chukchi Sea to the waters north of the Soya Strait. Densities peaks occurred at stations in the two branches of the Alaska Current and decreased both northward and southward. The densities were <10 ind./dm(3) at most stations in Arctic region. The dominant genera (Acanthostomella, Codonellopsis, Parafavella, and Ptychocylis) accounted for 79.07 +/- 29.67% (n = 49) of the abundance in the boreal assemblage. The densities of the dominant genera covaried with strongly significant positive correlations. Tintinnids with lorica oral diameter of 22-26 mu m and 38-42 mu m were dominant and contributed 67.35% and 15.13%, respectively, to the total abundance in the boreal assemblage. The distribution and densities of Tintinnids in the study area suggest that the Soya Strait might be a geographical barrier for Tintinnids expansion.
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Boreal Tintinnid Assemblage in the Northwest Pacific and Its Connection with the Japan Sea in Summer 2014.
PloS one, 2016Co-Authors: Wuchang Zhang, Shaoqing Wang, Guangtao Zhang, Tian XiaoAbstract:Tintinnids are planktonic ciliates that play an important role in marine ecosystem. According to their distribution in the world oceans, Tintinnid genera were divided into several biogeographical types such as boreal, warm water, austral and neritic. Therefore, the oceanic Tintinnid assemblage could be correspondingly divided into boreal assemblage, warm water assemblage and austral assemblage. The purpose of this study was to investigate the characteristics of boreal Tintinnid assemblage in the Northwest Pacific and the Arctic, and to identify the connection between boreal Tintinnid assemblage and neighboring assemblages. Surface water samples were collected along a transect from the East China Sea to the Chukchi Sea in summer 2014. According to the presence of boreal genera and warm water genera, three Tintinnid assemblages (the East China Sea neritic assemblage, the Japan Sea warm water assemblage, and the boreal assemblage) were identified along the transect. The boreal assemblage extended from the Chukchi Sea to the waters north of the Soya Strait. Densities peaks occurred at stations in the two branches of the Alaska Current and decreased both northward and southward. The densities were
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Interaction between neritic and warm water Tintinnids in surface waters of East China Sea
Deep Sea Research Part II: Topical Studies in Oceanography, 2016Co-Authors: Yuan Zhao, Wuchang Zhang, Xuliang Chen, Li Jia, Tian XiaoAbstract:Tintinnid are important microzooplankton in marine pelagic habitats. In the temperate shelf area, Tintinnid could be divided into neritic, warm-water and cosmopolitan biogeographical types. Up to now, there is no understanding in the interaction between neritic and warm-water genera in shelf waters. Here we studied the interaction of neritic and warm-water Tintinnids in East China Sea during three cruises (May, August and October) in 2013. Our hypothesis were (1) that the factors influencing the expansion of neritic and warm-water genera were different and (2) that different genera within each biogeographical type had different adaptation abilities in the process of expansion. Totally 94 species in 36 genera were identified in three cruises. According to the distribution of each Tintinnid genus in the three cruises, Tintinnid genera were divided into three biogeographical types: neritic, warm-water and cosmopolitan. The data confirmed our hypothesis. The factor influencing neritic Tintinnid species richness and abundance was water depth while salinity was the factor influencing species richness and abundance of warm-water Tintinnids. According to the difference in their expansion ability, neritic and warm-water genera could be divided into core genera and pioneer genera. In the case of neritic genera, core and pioneer neritic genera stayed together in May and August while pioneer neritic genera expanded a lot out to the oceanic water in October. In the case of warm-water genera, the pioneer genera always expanded a lot out to the coast in all three cruises. In May and August, the pioneers of neritic and warm-water genera did not meet. However, in October, the cores of neritic and warm-water genera collided. Our data clearly showed that the core and pioneer of both neritic and warm-water genera interacted in different modes in different months. Whether the cores of neritic and warm-water genera will further mixed in winter is an open question. (C) 2015 Elsevier Ltd. All rights reserved.
John R. Dolan - One of the best experts on this subject based on the ideXlab platform.
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The epibiotic life of the cosmopolitan diatom Fragilariopsis doliolus on heterotrophic ciliates in the open ocean
The ISME Journal, 2018Co-Authors: Flora J. Vincent, John R. Dolan, Sébastien Colin, Sarah Romac, Eleonora Scalco, Lucie Bittner, Yonara Garcia, Rubens M. Lopes, Adriana Zingone, Colomban VargasAbstract:Diatoms are a diverse and ecologically important group of phytoplankton. Although most species are considered free living, several are known to interact with other organisms within the plankton. Detailed imaging and molecular characterization of any such partnership is, however, limited, and an appraisal of the large-scale distribution and ecology of such consortia was never attempted. Here, observation of Tara Oceans samples from the Benguela Current led to the detection of an epibiotic association between a pennate diatom and a Tintinnid ciliate. We identified the diatom as Fragilariopsis doliolus that possesses a unique feature to form barrel-shaped chains, associated with seven different genera of Tintinnids including five previously undescribed associations. The organisms were commonly found together in the Atlantic and Pacific Ocean basins, and live observations of the interaction have been recorded for the first time. By combining confocal and scanning electron microscopy of individual consortia with the sequencing of high-resolution molecular markers, we analyzed their distribution in the global ocean, revealing morpho-genetically distinct Tintinnid haplotypes and biogeographically structured diatom haplotypes. The diatom was among the most abundant in the global ocean. We show that the consortia were particularly prevalent in nutrient-replete conditions, rich in potential predators. These observations support the hypothesis of a mutualistic symbiosis, wherein diatoms acquire increased motility and Tintinnids benefit from silicification through increased protection, and highlight that such associations may be more prevalent than currently appreciated.
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doi:10.4467/16890027AP.14.010.1447ACTA PROTOZOOLOGICA Microzooplankton in a Warming Arctic: A Comparison of Tintinnids and
2016Co-Authors: John R. Dolan, Eun-jin Yang, Tae Wan Kim, Sung-ho KangAbstract:and again in August 2012, a year of all time record low sea ice. We exploited this sampling to test the hypothesis that different sea ice conditions are associated with differences in abundances or species composition of microzooplankton through an examination of Tintinnids and radiolarians. From 18 stations in 2011, and 19 stations in 2012, organisms were enumerated in plankton net tow material, and chlorophyll determinations made (total and ≤ 20 µm) from discrete depth samples. We found that the low sea ice conditions of 2012 were associated with higher chlorophyll concentrations (both total and the ≤ 20 µm size fraction), compared to 2011. However, Tintinnid ciliates and radiolarians were much lower in concentration, by about an order of magnitude, compared to 2011. In both years the radiolarian assemblage was dominated by Amphiselma setosa. The species composition of the Tintinnid ciliates was similar in the two years, but there were distinct differences in the relative abun-dances of certain species. The 2012, low sea ice assemblage, was dominated by small forms in contrast to 2011, when large species were the most abundant. We present these findings in detail and discuss possible explanations for the apparent differences in the microzooplankto
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d’Océanographie de Villefranche,
2016Co-Authors: John R. Dolan, Eun-jin Yang, Sang Hoon Lee, Sun Young Kim, Marine Microbial, Universite Pierre, Marie CurieAbstract:The Amundsen Sea has been described as one of the most productive and dynamic pelagic systems in Antarctica and is one of the least studied. Based on samples from 15 stations in the Amundsen Sea, we describe for the first time the composition of the Tintinnid ciliate assemblage of the microzooplankton. We compared the species compositions of coastal polynya sites, where the phytoplankton communities are dominated by Phaeocystis, to those of the offshore deep water sites, which are dominated by diatoms. We found a total of 15 species. Polynya sites were dominated by a few species of Tintinnids, mostly those endemic to the Southern Ocean. In contrast, the deep-water sites contained many widespread Tintinnid species, which are known from a wide variety of systems as well as other areas of the Southern Ocean. We examined polymorphism known to characterize the Antarctic Tintinnid species Cymato-cylis affinis/convallaria and Codonellopsis gaussi. We found that the types or forms found appeared unrelated to the type of microplankton community, define
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protozoologica Morphology and Ecology in Tintinnid Ciliates of the Marine Plankton: Correlates of Lorica Dimensions
2015Co-Authors: John R. DolanAbstract:Summary. Tintinnid ciliates, characterized by the possession of a lorica into which the ciliate cell can contract, are a common component of the marine microzooplankton. Lorica architecture and size range widely and classically distinguishes species. Here relationships between ecological parameters and lorica dimensions (lorica oral diameter (LOD), lorica length (LL) and lorica volume (LV) are examined using data from literature reports. The relationships between lorica dimensions and reproductive potential, using maximum reported growth rates of natural populations (n = 52 species) are assessed. Susceptibility to copepod predation and lorica dimensions are considered based on reports of clearance rates of Acartia species feeding on Tintinnid ciliates (n = 7 species). Diet and lorica dimension is analyzed using data on mean maximum food size contained in field-caught cells (n = 20 species), and preferred food size based on prey size associated with maximal reported clearance rates (n = 15 species). Overall, LOD is closely related to most of the ecological parameters. Maximum growth rate is related to LOD with smaller LODs corresponding to higher growth rates, in contrast to LL and LV. Maximum prey size is positively related to both LOD and LL but more tightly with LOD. Preferred prey size is positively related to LOD and LV but more tightly related to LOD. Clearance rates of Acartia species feeding on Tintinnids are significantly related only to LOD with small LODs corresponding to lower copepod feeding rates. Relationships excluding data on species of Tintinnopsis, the species-rich genus which generally dominates coastal communities, are also examined and show similar trends. In Tintinnids, LOD, known to be a conservative and relatively reliable specie
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Acta Protozool. (2007) 46: 279–288 ActA
2015Co-Authors: Nelly Gavrilova, John R. DolanAbstract:Summary. We investigated Tintinnid (planktonic ciliate protists) in the Black Sea, a system which has undergone marked changes. Obvious shifts in the Black Sea began with eutrophication from the 1960’s to the 1980’s, followed by blooms of the carnivorous comb jelly Mnemi-opsis in the late 1980’s–early 1990’s and finally de-eutrophication and the decline of the comb jelly since the mid-1990’s. Here we docu-ment historical changes in apparent species inventories which correspond with ecosystem changes. Tintinnid ciliates have been studied in the Black Sea for over 130 years. Records were assembled by year of publication, ignoring all variability in sampling methods, geographic location and extent of sampling, season of collection, etc. Time lines were constructed for each species. The number of species reported in-creased steadily from the 1870’s to the mid-1960’s. With eutrophication and the damming of the Danube River, the frequency of new species records declined from the 1960’s to the 1990’s but with no apparent species losses. The 1990’s to the present corresponds with rise and fall of blooms of the comb jelly and the collapse and recovery of the anchovy fishery. For this last period, we found an increase in the numbers of both new species records and ‘apparent ’ losses of Tintinnid species. Our analysis suggests that abrupt changes in planktonic ecosystems may be detectable with a very crude metric of plankton community composition – lists of apparent species. iNTroDUCTioN Tintinnids are planktonic choreotrich ciliates, char-acterized by the possession of a shell or lorica. They are a component of the microzooplankton, and lik
Wuchang Zhang - One of the best experts on this subject based on the ideXlab platform.
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Tintinnid community throughout the Bohai Sea during the spring
Acta Oceanologica Sinica, 2020Co-Authors: Feng Zhou, Wuchang Zhang, Chen Wei, Qunshan Wang, Enjun FangAbstract:As one of the important microzooplankton in marine pelagic habitats, Tintinnids are classified as neritic genera, oceanic genera and cosmopolitan genera. Until now, we know little about the interaction between neritic and oceanic genera in continental shelves. Low species richness area was found in the mixing area between neritic and oceanic genera in the East China Sea. In this study, we investigated the spatial distribution of Tintinnid community throughout the entire Bohai Sea in May (spring) of 2014 to find out: (1) whether the Tintinnid assembalges differed in the three major bays bordering this shallow inland sea; (2) whether there was low species richness area in the Bohai Sea. Three genera and 11 species attributed to neritic and cosmopolitan taxa were reported from this region. Tintinnid abundance averaged (81±216) ind./L (0–1 234 ind./L). Tintinnid community differed within the three major bays, with each characterized by different Tintinnid taxa. Referring to the average abundance of three bays, Tintinnids were most abundant in the Laizhou Bay ((328±445) ind./L), and least abundant in the Liaodong Bay ((34±57) ind./L). A low species richness area occurred in the central Bohai Sea (20–40 m isobaths), in some stations of which no Tintinnid was recorded. Our study demonstrates that Tintinnid community varied greatly over small spatial scales, and low species richness area was found in the mixing area between neritic and oceanic genera within this inland sea.
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Planktonic ciliates in different water masses in open waters near Prydz Bay (East Antarctica) during austral summer, with an emphasis on Tintinnid assemblages
Polar Biology, 2018Co-Authors: Chen Liang, Wuchang Zhang, Yuan Zhao, Yi Dong, Zhencheng Tao, G GregoriAbstract:Planktonic ciliates are important microzooplankton in pelagic ecosystems. Previous studies in Antarctic waters have only investigated ciliate assemblages in different habitats without considering water masses. In this article, we report the characteristics of ciliate assemblages in different water masses in open waters near Prydz Bay (East Antarctica) during austral summer. Three water masses were identified according to temperature and salinity: Summer Surface Water (SSW), Winter Water (WW), and Circumpolar Deep Water (CDW). SSW was further divided into SSW Chl a < 3 (in vivo Chlorophyll a > 3 mg m −3) and SSW Chl a < 3 (in vivo Chlorophyll a < 3 mg m −3). Ciliate abundance and biomass in water masses decreased in the order: SSW > WW > CDW. SSW Chl a > 3 had a higher proportion (38.2%) of Tintinnids to the total ciliate abundance and larger aloricate ciliates (ciliates in the 10-20 µm size class were < 15% of the total aloricate ciliate abundance) than in other water masses. WW had a higher proportion (> 30%) of Southern Ocean endemic Tintinnid species in total Tintinnid abundance than in other water masses. Each water mass had the following indigenous Tintinnid species: SSW, Salpingella sp., Codonellopsis gaussi; WW, Salpingella costata, S. faurei, Cymatocylis affinis/convallaria forma drygalskii, and C. vanhoeffeni. Laackman-niella naviculaefera and C. affinis/convallaria forma cristallina were present at high abundance in both WW and SSW Chl a > 3. Upwelling caused discontinuity of the ciliate distribution. Our results will help predict the spatial and temporal variations of ciliate assemblages and other plankton according to the dynamics of water masses in Antarctic waters.
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planktonic ciliates in different water masses in open waters near prydz bay east antarctica during austral summer with an emphasis on Tintinnid assemblages
Polar Biology, 2018Co-Authors: Chen Liang, Wuchang Zhang, Yuan Zhao, Yi Dong, Zhencheng Tao, G GregoriAbstract:Planktonic ciliates are important microzooplankton in pelagic ecosystems. Previous studies in Antarctic waters have only investigated ciliate assemblages in different habitats without considering water masses. In this article, we report the characteristics of ciliate assemblages in different water masses in open waters near Prydz Bay (East Antarctica) during austral summer. Three water masses were identified according to temperature and salinity: Summer Surface Water (SSW), Winter Water (WW), and Circumpolar Deep Water (CDW). SSW was further divided into SSWChl a 3 mg m−3) and SSWChl a WW > CDW. SSWChl a > 3 had a higher proportion (38.2%) of Tintinnids to the total ciliate abundance and larger aloricate ciliates (ciliates in the 10–20 µm size class were 30%) of Southern Ocean endemic Tintinnid species in total Tintinnid abundance than in other water masses. Each water mass had the following indigenous Tintinnid species: SSW, Salpingella sp., Codonellopsis gaussi; WW, Salpingella costata, S. faurei, Cymatocylis affinis/convallaria forma drygalskii, and C. vanhoeffeni. Laackmanniella naviculaefera and C. affinis/convallaria forma cristallina were present at high abundance in both WW and SSWChl a > 3. Upwelling caused discontinuity of the ciliate distribution. Our results will help predict the spatial and temporal variations of ciliate assemblages and other plankton according to the dynamics of water masses in Antarctic waters.
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Dataset of long term variation in species occurrence and abundance of Tintinnid assemblages in Jiaozhou Bay, China.
Data in brief, 2018Co-Authors: Meiping Feng, Wuchang Zhang, Guangtao Zhang, Tian Xiao, Yuan Zhao, Chaofeng Wang, Chunsheng Wang, Weiding Wang, Bi YuanxinAbstract:Abstract This article contains supportive data related to a research article entitled “Annual variation of species richness and lorica oral diameter characteristics of Tintinnids in a semi-enclosed bay of western Pacific” (Feng et al., 2018) [1] . This article describes long term data of Tintinnid assemblages in Jiaozhou Bay, Yellow sea, a semi-enclosed basin ecosystem of western Pacific, from May 2003 to December 2012. We sum up the whole dataset for each year showing Tintinnid species occurrence and abundance at each site by date, as well as the photographic documentation of each Tintinnid species. Further interpretation and discussion can be found in recently published by Feng et al. in Estuarine, Coastal and Shelf Science at Science.
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Distribution of Different Biogeographical Tintinnids in Yellow Sea and Bohai Sea
Journal of Ocean University of China, 2018Co-Authors: Xue Chen, Wuchang Zhang, Yuan Zhao, Li Zhao, Yi Dong, Tian XiaoAbstract:There were different biogeographical Tintinnids in the oceans. Knowledge of their distribution pattern and mixing was important to the understanding of ecosystem functions. Yellow Sea (YS) and Bohai Sea (BS) were semi-enclosed seas influenced by warm water intrusion and YS cold bottom water. The occurrence of Tintinnids in YS and BS during two cruises (summer and winter) were investigated to find out: i) whether warm-water Tintinnids appeared in YS and BS; ii) whether boreal Tintinnids appeared in high summer; iii) the core area of neritic Tintinnids and iv) how these different biogeographical Tintinnids mixed. Our results showed that Tintinnid community was dominated by neritic Tintinnid. We confirmed the occurrence of warm-water Tintinnids in summer and winter. In summer, they intruded into BS and mainly distributed in the upper 20 m where Yellow Sea Surface Warm Water (YSSWW) developed. In winter, they were limited in the surface water of central deep region (bottom depth >50 m) of YS where were affected by Yellow Sea Warm Water (YSWW). Boreal Tintinnids occurred in YS in high summer (August) and in winter, while they were not observed in BS. In summer, the highest abundance of boreal Tintinnids occurred in Yellow Sea Bottom Cold Water, indicating the presence of an oversummering stock. In winter, they were concentrated in the north of YSWW. Vertically, neritic Tintinnids abundance was high in the bottom layers. Horizontally, high neritic Tintinnids abundance in bottom layers occurred along the 50 m isobath coinciding with the position of front systems. Front systems were the core distribution area of neritic Tintinnids. High abundance areas of warm-water and boreal Tintinnids were clearly separated vertically in summer, and horizontally in winter. High abundance of neritic Tintinnids rarely overlapped with that of warm-water or boreal Tintinnids.
Santosh Kumar Sarkar - One of the best experts on this subject based on the ideXlab platform.
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diversity and distribution of microzooplankton Tintinnid ciliata protozoa in the core region of indian sundarban wetland
Clean-soil Air Water, 2016Co-Authors: Dibyendu Rakshit, Santosh Kumar Sarkar, Palani Sankar Ganesh, Nallamuthu Godhantaraman, K K Satpathy, Jayanta Kumar BiswasAbstract:The study first investigated the spatial distribution, diversity, and biomass of the planktonic choreotrich ciliate Tintinnids inhabiting the biosphere reserve, the core region of Indian Sundarban mangrove wetland. A total of 21 species (eight genera and six families) were recorded including agglomerated and non-agglomerated or hyaline forms from these intricate estuarine network systems. Maximum mean abundance (2747 ± 111 individuals L−1) and species diversity (H′ = 2.32) of Tintinnid ciliate were recorded at the sampling site located towards the Bay of Bengal whereas lower abundance (666 ± 56 individuals L−1) and diversity (H′ = 1.55) were encountered towards inner part of the estuary. Tintinnopsis represented the most dominant agglutinated genus comprising of Tintinnopsis beroidea, Tintinnopsis fimbriata, Tintinnopsis cylindrica, Tintinnopsis tocantinensis, and Tintinnopsis radix, accounting ∼52% of total Tintinnid community. The agglomerated forms Amphorellopsis tetragona, Eutintinnus apertus, Codonellopsis lusitanica, and T. fimbriata were recorded for the first time in this region. The biomass value exhibited wide range of variations (0.03 ± 0.09 to 12.4 ± 1.1 μg C L−1), accounting maximum value towards seaward region. The small-sized Tintinnid (lorica length <40 μm) contributed the most dominant group (sharing ∼85% of total species abundance) in this core region and their presence was mainly governed by factors, namely, chlorophyll α, salinity, and nutrients (nitrate and silicate). The results of combining multivariate methods (RELATE and BIOENV analyses) reveal that chl a and nitrate were the potential significant factors for Tintinnid abundance and distribution.
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Bioindicator role of Tintinnid (Protozoa: Ciliophora) for water quality monitoring in Kalpakkam, Tamil Nadu, south east coast of India.
Marine pollution bulletin, 2016Co-Authors: Dibyendu Rakshit, Gouri Sahu, A. K. Mohanty, Kamala Kanta Satpathy, M.p. Jonathan, Kadarkarai Murugan, Santosh Kumar SarkarAbstract:Abstract The feasibility of a potential bioindicator based on functional groups of microzooplankton Tintinnids for bioassessments of water quality status was studied during southwest monsoon (June to September) along the coastal waters of Kalpakkam, India during 2012–2015. The work highlights the following features (1) Tintinnid community composed of 28 species belonging to 11 genera and 9 families, revealed significant differences among the four study sites (2) maximum numerical abundance (2224 ± 90 ind. l − 1 ) and species diversity (H′ = 2.66) of Tintinnid were recorded towards Bay of Bengal whereas minimum abundance (720 ± 35 ind. l − 1 ) and diversity (H′ = 1.74) were encountered in the backwater sites, (3) multivariate analyses [RELATE, Biota-environment (BIOENV) and canonical analysis of principal coordinates (CAP)] reveal that chl a , nitrate and phosphate were the potential causative factors for Tintinnid distribution. Based on the results, we suggest that Tintinnids may be used as a potential bioindicator of water quality status in marine ecosystem.
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Diversity and Distribution of Microzooplankton Tintinnid (Ciliata: Protozoa) in the Core Region of Indian Sundarban Wetland
Clean-soil Air Water, 2016Co-Authors: Dibyendu Rakshit, Santosh Kumar Sarkar, Kamala Kanta Satpathy, Palani Sankar Ganesh, Nallamuthu Godhantaraman, Jayanta Kumar BiswasAbstract:The study first investigated the spatial distribution, diversity, and biomass of the planktonic choreotrich ciliate Tintinnids inhabiting the biosphere reserve, the core region of Indian Sundarban mangrove wetland. A total of 21 species (eight genera and six families) were recorded including agglomerated and non-agglomerated or hyaline forms from these intricate estuarine network systems. Maximum mean abundance (2747 ± 111 individuals L−1) and species diversity (H′ = 2.32) of Tintinnid ciliate were recorded at the sampling site located towards the Bay of Bengal whereas lower abundance (666 ± 56 individuals L−1) and diversity (H′ = 1.55) were encountered towards inner part of the estuary. Tintinnopsis represented the most dominant agglutinated genus comprising of Tintinnopsis beroidea, Tintinnopsis fimbriata, Tintinnopsis cylindrica, Tintinnopsis tocantinensis, and Tintinnopsis radix, accounting ∼52% of total Tintinnid community. The agglomerated forms Amphorellopsis tetragona, Eutintinnus apertus, Codonellopsis lusitanica, and T. fimbriata were recorded for the first time in this region. The biomass value exhibited wide range of variations (0.03 ± 0.09 to 12.4 ± 1.1 μg C L−1), accounting maximum value towards seaward region. The small-sized Tintinnid (lorica length
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Choreotrich ciliate Tintinnid (Protozoa: Ciliophora) in a tropical meso–macrotidal estuary, eastern part of India
Regional Studies in Marine Science, 2016Co-Authors: Dibyendu Rakshit, P. Sankar Ganesh, Santosh Kumar SarkarAbstract:Abstract An annual community structure of the loricate ciliate Tintinnids, the ubiquitous planktonic protist, was analysed from nine sampling sites ( n = 108 ) of diverse environmental stresses along the Hooghly (Ganges) River Estuary, eastern coastal part of India. The agglomerated genus Tintinnopsis sp., was dominated among the 32 identified Tintinnid species (3 core, 12 seasonal and 17 occasional species) contributing ∼62% of total Tintinnid population. The size-class distribution of lorica oral diameter ranges between 9 and 22 μm for majority of the Tintinnids (∼71%) which provides relevant information on the ecological characteristics for the species assemblages. The maximum species diversity for Tintinnid ( H ′ = 1.71 ) during postmonsoon (February, 2014) has been attributed by high numerical density of phytoplankton dominated by diatoms (4400 cells l − 1 , H ′ = 3.41 ) at the site Gangasagar, mouth of the estuary. The large-sized Tintinnids Tintinnopsis cylindrica (lorica length = 262.8 μm; lorica oral diameter = 65 μm) and T. radix (lorica length = 278.6 μm; lorica oral diameter = 62 μm) belonging to family Codonellidae, formed successful dominant group (>50% of the total) in this estuarine ecosystem. The core species abundance ( Tintinnopsis beroidea, Tintinnidium primitivum and Leprotintinnus simplex ) shares ∼57% of total Tintinnid population followed by seasonal (35%) and occasional species (8%), characterized by their eurythermal and euryhaline nature. As revealed from the results of cluster analyses, majority of the Tintinnids formed an individual functional group, exhibiting similar assemblages in species distribution. The Canonical Correspondence Analysis map (CCA) revealed a clustering of core species with the phytopigment (Chlorophyll a ) and dissolved oxygen which were found to be the most important causative factors controlling the distribution and seasonal patterns of Tintinnids. Well-defined Tintinnid assemblages are evident representing the fingerprint of the specific ecological zone of Hooghly estuary, characterized by a set of environmental variables.
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choreotrich ciliate Tintinnid protozoa ciliophora in a tropical meso macrotidal estuary eastern part of india
Regional Studies in Marine Science, 2016Co-Authors: Dibyendu Rakshit, Sankar P Ganesh, Santosh Kumar SarkarAbstract:Abstract An annual community structure of the loricate ciliate Tintinnids, the ubiquitous planktonic protist, was analysed from nine sampling sites ( n = 108 ) of diverse environmental stresses along the Hooghly (Ganges) River Estuary, eastern coastal part of India. The agglomerated genus Tintinnopsis sp., was dominated among the 32 identified Tintinnid species (3 core, 12 seasonal and 17 occasional species) contributing ∼62% of total Tintinnid population. The size-class distribution of lorica oral diameter ranges between 9 and 22 μm for majority of the Tintinnids (∼71%) which provides relevant information on the ecological characteristics for the species assemblages. The maximum species diversity for Tintinnid ( H ′ = 1.71 ) during postmonsoon (February, 2014) has been attributed by high numerical density of phytoplankton dominated by diatoms (4400 cells l − 1 , H ′ = 3.41 ) at the site Gangasagar, mouth of the estuary. The large-sized Tintinnids Tintinnopsis cylindrica (lorica length = 262.8 μm; lorica oral diameter = 65 μm) and T. radix (lorica length = 278.6 μm; lorica oral diameter = 62 μm) belonging to family Codonellidae, formed successful dominant group (>50% of the total) in this estuarine ecosystem. The core species abundance ( Tintinnopsis beroidea, Tintinnidium primitivum and Leprotintinnus simplex ) shares ∼57% of total Tintinnid population followed by seasonal (35%) and occasional species (8%), characterized by their eurythermal and euryhaline nature. As revealed from the results of cluster analyses, majority of the Tintinnids formed an individual functional group, exhibiting similar assemblages in species distribution. The Canonical Correspondence Analysis map (CCA) revealed a clustering of core species with the phytopigment (Chlorophyll a ) and dissolved oxygen which were found to be the most important causative factors controlling the distribution and seasonal patterns of Tintinnids. Well-defined Tintinnid assemblages are evident representing the fingerprint of the specific ecological zone of Hooghly estuary, characterized by a set of environmental variables.
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diversity and distribution of microzooplankton Tintinnid ciliata protozoa in the core region of indian sundarban wetland
Clean-soil Air Water, 2016Co-Authors: Dibyendu Rakshit, Santosh Kumar Sarkar, Palani Sankar Ganesh, Nallamuthu Godhantaraman, K K Satpathy, Jayanta Kumar BiswasAbstract:The study first investigated the spatial distribution, diversity, and biomass of the planktonic choreotrich ciliate Tintinnids inhabiting the biosphere reserve, the core region of Indian Sundarban mangrove wetland. A total of 21 species (eight genera and six families) were recorded including agglomerated and non-agglomerated or hyaline forms from these intricate estuarine network systems. Maximum mean abundance (2747 ± 111 individuals L−1) and species diversity (H′ = 2.32) of Tintinnid ciliate were recorded at the sampling site located towards the Bay of Bengal whereas lower abundance (666 ± 56 individuals L−1) and diversity (H′ = 1.55) were encountered towards inner part of the estuary. Tintinnopsis represented the most dominant agglutinated genus comprising of Tintinnopsis beroidea, Tintinnopsis fimbriata, Tintinnopsis cylindrica, Tintinnopsis tocantinensis, and Tintinnopsis radix, accounting ∼52% of total Tintinnid community. The agglomerated forms Amphorellopsis tetragona, Eutintinnus apertus, Codonellopsis lusitanica, and T. fimbriata were recorded for the first time in this region. The biomass value exhibited wide range of variations (0.03 ± 0.09 to 12.4 ± 1.1 μg C L−1), accounting maximum value towards seaward region. The small-sized Tintinnid (lorica length <40 μm) contributed the most dominant group (sharing ∼85% of total species abundance) in this core region and their presence was mainly governed by factors, namely, chlorophyll α, salinity, and nutrients (nitrate and silicate). The results of combining multivariate methods (RELATE and BIOENV analyses) reveal that chl a and nitrate were the potential significant factors for Tintinnid abundance and distribution.
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Bioindicator role of Tintinnid (Protozoa: Ciliophora) for water quality monitoring in Kalpakkam, Tamil Nadu, south east coast of India.
Marine pollution bulletin, 2016Co-Authors: Dibyendu Rakshit, Gouri Sahu, A. K. Mohanty, Kamala Kanta Satpathy, M.p. Jonathan, Kadarkarai Murugan, Santosh Kumar SarkarAbstract:Abstract The feasibility of a potential bioindicator based on functional groups of microzooplankton Tintinnids for bioassessments of water quality status was studied during southwest monsoon (June to September) along the coastal waters of Kalpakkam, India during 2012–2015. The work highlights the following features (1) Tintinnid community composed of 28 species belonging to 11 genera and 9 families, revealed significant differences among the four study sites (2) maximum numerical abundance (2224 ± 90 ind. l − 1 ) and species diversity (H′ = 2.66) of Tintinnid were recorded towards Bay of Bengal whereas minimum abundance (720 ± 35 ind. l − 1 ) and diversity (H′ = 1.74) were encountered in the backwater sites, (3) multivariate analyses [RELATE, Biota-environment (BIOENV) and canonical analysis of principal coordinates (CAP)] reveal that chl a , nitrate and phosphate were the potential causative factors for Tintinnid distribution. Based on the results, we suggest that Tintinnids may be used as a potential bioindicator of water quality status in marine ecosystem.
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Diversity and Distribution of Microzooplankton Tintinnid (Ciliata: Protozoa) in the Core Region of Indian Sundarban Wetland
Clean-soil Air Water, 2016Co-Authors: Dibyendu Rakshit, Santosh Kumar Sarkar, Kamala Kanta Satpathy, Palani Sankar Ganesh, Nallamuthu Godhantaraman, Jayanta Kumar BiswasAbstract:The study first investigated the spatial distribution, diversity, and biomass of the planktonic choreotrich ciliate Tintinnids inhabiting the biosphere reserve, the core region of Indian Sundarban mangrove wetland. A total of 21 species (eight genera and six families) were recorded including agglomerated and non-agglomerated or hyaline forms from these intricate estuarine network systems. Maximum mean abundance (2747 ± 111 individuals L−1) and species diversity (H′ = 2.32) of Tintinnid ciliate were recorded at the sampling site located towards the Bay of Bengal whereas lower abundance (666 ± 56 individuals L−1) and diversity (H′ = 1.55) were encountered towards inner part of the estuary. Tintinnopsis represented the most dominant agglutinated genus comprising of Tintinnopsis beroidea, Tintinnopsis fimbriata, Tintinnopsis cylindrica, Tintinnopsis tocantinensis, and Tintinnopsis radix, accounting ∼52% of total Tintinnid community. The agglomerated forms Amphorellopsis tetragona, Eutintinnus apertus, Codonellopsis lusitanica, and T. fimbriata were recorded for the first time in this region. The biomass value exhibited wide range of variations (0.03 ± 0.09 to 12.4 ± 1.1 μg C L−1), accounting maximum value towards seaward region. The small-sized Tintinnid (lorica length
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Choreotrich ciliate Tintinnid (Protozoa: Ciliophora) in a tropical meso–macrotidal estuary, eastern part of India
Regional Studies in Marine Science, 2016Co-Authors: Dibyendu Rakshit, P. Sankar Ganesh, Santosh Kumar SarkarAbstract:Abstract An annual community structure of the loricate ciliate Tintinnids, the ubiquitous planktonic protist, was analysed from nine sampling sites ( n = 108 ) of diverse environmental stresses along the Hooghly (Ganges) River Estuary, eastern coastal part of India. The agglomerated genus Tintinnopsis sp., was dominated among the 32 identified Tintinnid species (3 core, 12 seasonal and 17 occasional species) contributing ∼62% of total Tintinnid population. The size-class distribution of lorica oral diameter ranges between 9 and 22 μm for majority of the Tintinnids (∼71%) which provides relevant information on the ecological characteristics for the species assemblages. The maximum species diversity for Tintinnid ( H ′ = 1.71 ) during postmonsoon (February, 2014) has been attributed by high numerical density of phytoplankton dominated by diatoms (4400 cells l − 1 , H ′ = 3.41 ) at the site Gangasagar, mouth of the estuary. The large-sized Tintinnids Tintinnopsis cylindrica (lorica length = 262.8 μm; lorica oral diameter = 65 μm) and T. radix (lorica length = 278.6 μm; lorica oral diameter = 62 μm) belonging to family Codonellidae, formed successful dominant group (>50% of the total) in this estuarine ecosystem. The core species abundance ( Tintinnopsis beroidea, Tintinnidium primitivum and Leprotintinnus simplex ) shares ∼57% of total Tintinnid population followed by seasonal (35%) and occasional species (8%), characterized by their eurythermal and euryhaline nature. As revealed from the results of cluster analyses, majority of the Tintinnids formed an individual functional group, exhibiting similar assemblages in species distribution. The Canonical Correspondence Analysis map (CCA) revealed a clustering of core species with the phytopigment (Chlorophyll a ) and dissolved oxygen which were found to be the most important causative factors controlling the distribution and seasonal patterns of Tintinnids. Well-defined Tintinnid assemblages are evident representing the fingerprint of the specific ecological zone of Hooghly estuary, characterized by a set of environmental variables.
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choreotrich ciliate Tintinnid protozoa ciliophora in a tropical meso macrotidal estuary eastern part of india
Regional Studies in Marine Science, 2016Co-Authors: Dibyendu Rakshit, Sankar P Ganesh, Santosh Kumar SarkarAbstract:Abstract An annual community structure of the loricate ciliate Tintinnids, the ubiquitous planktonic protist, was analysed from nine sampling sites ( n = 108 ) of diverse environmental stresses along the Hooghly (Ganges) River Estuary, eastern coastal part of India. The agglomerated genus Tintinnopsis sp., was dominated among the 32 identified Tintinnid species (3 core, 12 seasonal and 17 occasional species) contributing ∼62% of total Tintinnid population. The size-class distribution of lorica oral diameter ranges between 9 and 22 μm for majority of the Tintinnids (∼71%) which provides relevant information on the ecological characteristics for the species assemblages. The maximum species diversity for Tintinnid ( H ′ = 1.71 ) during postmonsoon (February, 2014) has been attributed by high numerical density of phytoplankton dominated by diatoms (4400 cells l − 1 , H ′ = 3.41 ) at the site Gangasagar, mouth of the estuary. The large-sized Tintinnids Tintinnopsis cylindrica (lorica length = 262.8 μm; lorica oral diameter = 65 μm) and T. radix (lorica length = 278.6 μm; lorica oral diameter = 62 μm) belonging to family Codonellidae, formed successful dominant group (>50% of the total) in this estuarine ecosystem. The core species abundance ( Tintinnopsis beroidea, Tintinnidium primitivum and Leprotintinnus simplex ) shares ∼57% of total Tintinnid population followed by seasonal (35%) and occasional species (8%), characterized by their eurythermal and euryhaline nature. As revealed from the results of cluster analyses, majority of the Tintinnids formed an individual functional group, exhibiting similar assemblages in species distribution. The Canonical Correspondence Analysis map (CCA) revealed a clustering of core species with the phytopigment (Chlorophyll a ) and dissolved oxygen which were found to be the most important causative factors controlling the distribution and seasonal patterns of Tintinnids. Well-defined Tintinnid assemblages are evident representing the fingerprint of the specific ecological zone of Hooghly estuary, characterized by a set of environmental variables.
