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  • 1
    Online Resource
    Online Resource
    Silica-scaled chrysophytes from Cam Ranh Peninsula (Khanh Hoa Province, Vietnam)
    Schweizerbart ; 2019
    In:  Nova Hedwigia, Beihefte Vol. 148 ( 2019-02-27), p. 63-76
    Details
    In: Nova Hedwigia, Beihefte, Schweizerbart, Vol. 148 ( 2019-02-27), p. 63-76
    Type of Medium: Online Resource
    ISSN: 1438-9134
    Uniform Title: Silica-scaled chrysophytes from Cam Ranh Peninsula (Khanh Hoa Province, Vietnam)
    URL: Article
    DOI: 10.1127/nova-suppl/2019/077
    Language: English , English
    Publisher: Schweizerbart
    Publication Date: 2019
    SSG: 21
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  • 2
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    Online Resource
    Dinoflagellate cysts in surface sediments at Van Phong Bay, Khanh Hoa Province, Vietnam: distribution, abundance and potentially harmful algal blooms
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Academia Journal of Biology Vol. 43, No. 1 ( 2021-03-31)
    Details
    In: Academia Journal of Biology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 43, No. 1 ( 2021-03-31)
    Abstract: Studies on dinoflagellate cysts provide important knowledge on the ecology of dinoflagellates and harmful algal blooms (HABs). In this study, distribution and abundance of dinoflagellate cysts in surface sediments from 17 stations at Van Phong Bay were analyzed. There were 55 different types of cysts representing 3 orders and 18 genera, and 8 unidentified cyst types recorded. Peridiniales was the most diverse order with 29 cyst types, including 20 Protoperidinium cyst types. There were 10 cyst types of 7 potential toxic dinoflagellate species and 4 of bloom forming species found, indicating a potential risk of harmful algal blooms in Van Phong Bay. Number of cyst types and density ranged from 12 to 31 types and from 115 to 3,760 per gram of dry weight sediment, respectively. Cysts of Leonella granifera were dominant at stations in the mouth of the Bay, while Scrippsiella trochoidea cysts dominated at all stations. Shannon diversity index (H') was low, varying from 1.192.72. There were two distinct cyst assemblages identified with 40% Bray-Curtis similarity, assemblage I with 2 stations (VP09 and VP10), and assemblage II with the other stations. 
    Type of Medium: Online Resource
    ISSN: 2615-9023 , 2615-9023
    URL: Article
    DOI: 10.15625/2615-9023/15404
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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  • 3
    Online Resource
    Online Resource
    Variation of phytoplankton community structure in Quang Ngai coastal waters during 2015–2019
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 20, No. 4A ( 2021-04-11), p. 21-33
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 20, No. 4A ( 2021-04-11), p. 21-33
    Abstract: Phytoplankton in coastal waters are important for the evaluation of either biodiversity or environmental impacts because of this highly vulnerable ecosystem. Seasonal and annual changes in the phytoplankton community structure in Quang Ngai waters during the period 2015 to 2019 were analyzed to assess the phytoplankton diversity and reveal possible causes of these changes. A total of 366 phytoplankton taxa belonging to 10 classes were identified throughout this present study. The highest species number was found in 2019 with 295 taxa, followed by those in 2015 (247), 2017 (185), and 2018 (99). The waters of Ly Son transect showed the highest diversity and most stable phytoplankton communities in both dry and rainy seasons, whereas the stations of Quang Ngai coast revealed high variability of the communities. All diversity indices including Margalef, Pielou, Shannon, Simpson did not reflect well differences in average values but a certain degree of variances, indicating possible environmental impacts. During the study time, there were blooms of certain diatom species including Skeletonema spp. in 2015 and Pseudo-nitzschia spp. in 2019. Analysis of a diatoms index, Centric/Pennate ratio, indicated that the waters were in eutrophic status with a decreasing trend from the coast area to Ly Son island in 2015 and 2019. This research built up fundamental data on phytoplankton communities for Quang Ngai province. The Centric/Pennate diatom index and diversity would be used as indicators for environmental changes and their values provided warning of eutrophication in this coastal waters including the water surrounding Ly Son island.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/15652
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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  • 4
    Online Resource
    Online Resource
    Species diversity of Protoperidinium sect. Oceanica (Dinophyceae, Peridiniales) in Vietnamese waters, with description of the new species P. larsenii sp. nov.
    Wiley ; 2017
    In:  Nordic Journal of Botany Vol. 35, No. 2 ( 2017-04), p. 129-146
    Details
    In: Nordic Journal of Botany, Wiley, Vol. 35, No. 2 ( 2017-04), p. 129-146
    Abstract: Protoperidinium is one of the most important genera of armoured marine dinoflagellates. Despite its importance and many previous studies on this genus, the descriptions of many species are incomplete, their diagnostic features not properly described and illustrated and most species have been illustrated, if at all, only by line drawings and not documented by micro‐photography. As here described, examinations of about 600 phytoplankton net samples collected from Viet Nam and adjacent coastal waters over the last decade revealed about 100 species of Protoperidinium , ten of which belong to the section Oceanica and this paper is the first in a series describing all species of Protoperidinium found in Vietnamese waters. The Oceanica species are described and illustrated by light, and for some also by scanning electron, microscopy. The species are: Protoperidinium claudicans, P. depressum, P. depressum var. claudicanoides, P. larsenii sp. nov., P. murrayi, P. oceanicum f. bisintercalares comb. nov., P. oceanicum var. tenellum comb. nov., P. paraoblongum, P. venustum and P. venustum var. facetum. Protoperidinium larsenii L. Phan Tan, L. Nguyen‐Ngoc, and H. Doan‐Nhu is new to science. It was found in the coastal waters of Rach Gia in Kien Giang Province, western part of south Viet Nam (Gulf of Thailand). The new species is characterized by its broad shape, conical epitheca and short, non‐divergent antapical horns; the 1’ plate is asymmetrical, there are 3 anterior intercalary plates, the 2a plate is quadrangular; and the sutures connecting the 6” plate with the 4’ plate and the 7” form an almost straight line. By these features P. larsenii differs from the similar species P. claudicans and P. latidorsale. Protoperidinium oceanicum (Vanh ffen) Balech ( ) f. bisintercalares (Graham) H. Doan‐Nhu, L. Phan‐Tan, L. Nguyen‐Ngoc, and J. Larsen comb. nov. and Protoperidinium oceanicum (Vanh ffen) Balech ( ) var. tenellum (Graham) L. Nguyen‐Ngoc, L. Phan‐Tan, H. Doan‐Nhu and J. Larsen comb. nov. are two new combinations.
    Type of Medium: Online Resource
    ISSN: 0107-055X , 1756-1051
    URL: Issue
    URL: Article
    DOI: 10.1111/njb.2017.v35.i2
    DOI: 10.1111/njb.01230
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2406507-9
    SSG: 12
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  • 5
    Online Resource
    Online Resource
    Gambierdiscus (Gonyaulacales, Dinophyceae) diversity in Vietnamese waters with description of G. vietnamensis sp. nov.
    Wiley ; 2023
    In:  Journal of Phycology Vol. 59, No. 3 ( 2023-06), p. 496-517
    Details
    In: Journal of Phycology, Wiley, Vol. 59, No. 3 ( 2023-06), p. 496-517
    Abstract: Viet Nam has a coastline of 3200 km with thousands of islands providing diverse habitats for benthic harmful algal species including species of Gambierdiscus . Some of these species produce ciguatera toxins, which may accumulate in large carnivore fish potentially posing major threats to public health. This study reports five species of Gambierdiscus from Vietnamese waters, notably G. australes , G. caribaeus , G. carpenteri , G. pacificus , and G. vietnamensis sp. nov. All species are identified morphologically by LM and SEM, and identifications are supported by molecular analyses of nuclear rDNA (D1–D3 and D8–D10 domains of LSU, SSU, and ITS1‐5.8S‐ITS2 region) based on cultured material collected during 2010–2021. Statistical analyses of morphometric measurements may be used to differentiate some species if a sufficiently large number of cells are examined. Gambierdiscus vietnamensis sp. nov. is morphologically similar to other strongly reticulated species, such as G. belizeanus and possibly G. pacificus ; the latter species is morphologically indistinguishable from G. vietnamensis sp. nov., but they are genetically distinct, and molecular analysis is deemed necessary for proper identification of the new species. This study also revealed that strains denoted G. pacificus from Hainan Island (China) should be included in G. vietnamensis sp. nov.
    Type of Medium: Online Resource
    ISSN: 0022-3646 , 1529-8817
    URL: Issue
    URL: Article
    DOI: 10.1111/jpy.v59.3
    DOI: 10.1111/jpy.13326
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 281226-5
    detail.hit.zdb_id: 1478748-9
    SSG: 12
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  • 6
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    Online Resource
    Morphological and genetic analyses of Ostreopsis (Dinophyceae, Gonyaulacales, Ostreopsidaceae) species from Vietnamese waters with a re‐description of the type species, O. siamensis
    Wiley ; 2021
    In:  Journal of Phycology Vol. 57, No. 3 ( 2021-06), p. 1059-1083
    Details
    In: Journal of Phycology, Wiley, Vol. 57, No. 3 ( 2021-06), p. 1059-1083
    Abstract: Identification of species of the dinoflagellate genus Ostreopsis is difficult because several species have been poorly described, others misidentified in the literature, and the type species, O. siamensis, has not been described by contemporary taxonomic methods. In the present study, it is argued that Ostreopsis sp. 6 as described by previous authors is similar to the type species, and we offer an emended description of O. siamensis by LM, SEM, and molecular analyses of nuclear LSU and ITS rDNA based on material collected a few hundred kilometers from the type locality in the Gulf of Thailand and along the Vietnamese east coast. Ostreopsis siamensis is genetically different from the species reported as O.  cf.  siamensis in the literature and the latter should be described as a separate species. It is also concluded that with the poor knowledge of the morphological variability of many species of Ostreopsis , O. siamensis may not be distinguished from other similar‐sized species by its morphological features, and hence molecular data are needed for reliable identification. The species Ostreopsis lenticularis and Ostreopsis cf. ovata were also found and described.
    Type of Medium: Online Resource
    ISSN: 0022-3646 , 1529-8817
    URL: Issue
    URL: Article
    DOI: 10.1111/jpy.v57.3
    DOI: 10.1111/jpy.13157
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 281226-5
    detail.hit.zdb_id: 1478748-9
    SSG: 12
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  • 7
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    Online Resource
    Biodiversity of Tintinnids (Tintinnida) in Khanh Hoa - Binh Thuan waters
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  TAP CHI SINH HOC Vol. 39, No. 4 ( 2018-01-18), p. 421-433
    Details
    In: TAP CHI SINH HOC, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 39, No. 4 ( 2018-01-18), p. 421-433
    Abstract: Tintinnidsarean important protozoan group in the aquatic food web and had been widely studied in various waters. There are about 1000 known species in the world. However, there have beenvery few taxonomic studies in Vietnam and therefore the number of Tintinnid taxa and their distribution are poorly known. Thepresent study documents 65 tintinnids species belonging to 30 genera and 13 families in samples collected from Khanh Hoa - Binh Thuan waters in 2016 and 2017. There were 17 new taxa records for Vietnam protozoan fauna, raising the number of tintinnids recorded in Vietnam to 125 taxa. Tintinnid assemblages in Khanh Hoa-Binh Thuan waters shared about 17 species with Ha Long Bay, 32 species with Con Co island and 26 species with coastal waters of South Vietnam. Analysis of species diversity shows that the Shannon diversity index H' varied from 1.5 to 2.6. Distribution of species numbers and diversity in the Khanh Hoa - Binh Thuan waters revealed possible combined effects of hydrographical activities (e.g. upwelling), Mekong river influent (e.g. salinity), and food available on tintinnid communities.   Citation: Nguyen Thi Kieu, Phan Tan Luom, Nguyen Tam Vinh, Nguyen Ngoc Lam, Josepth P. Montoya, Doan Nhu Hai, 2017. Biodiversity of Tintinnids (Tintinnida) in Khanh Hoa - Binh Thuan waters. Tap chi Sinh hoc, 39(4): 421-433. DOI: 10.15625/0866-7160/v39n4.11033. *Corresponding author:haidoan-ion@planktonviet.org.vn Received 19 September 2017, accepted 12 December 2017 
    Type of Medium: Online Resource
    ISSN: 0866-7160 , 0866-7160
    URL: Article
    DOI: 10.15625/0866-7160/v39n4.11033
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2018
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  • 8
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    Online Resource
    Diversity of phytoplankton in lower Thu Bon river and Cu Lao Cham
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 19, No. 4A ( 2019-11-08), p. 215-227
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 19, No. 4A ( 2019-11-08), p. 215-227
    Abstract: Data on characteristics of phytoplankton communities is important scientific information in marine ecosystem, especially in assessment of environmental impacts on biodiversity in a specific waters. In the present study, two-year phytoplankton data was analyzed for species diversity, community structure changes and variation in 4 adjacent waters:  Lower Thu Bon river  (TB), transition waters (CT), Cu Lao Cham island (CLC) and offshore site (BM) to provide basic scientific data of phytoplankton communities, compare and assess seasonal changes and possible linkage of these adjacent waters. A total of 364 phytoplankton taxa of 12 classes were identified, showing high diversity and with seasonal variation of the investigated waters. There was strong difference of phytoplankton communities among the adjacent waters with low similarity index and the change of dominant species seasonally in each area. The species richness and diversity in the lower Thu Bon river were lower than in other areas. Variation of phytoplankton abundance and diversity along the river transect showed changes in species composition between the dry and rainy seasons but with similar trend in abundance. The low community similarity between the adjacent waters and the transition waters may indicate low impacts of river flow on phytoplankton communities in the coastal waters.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/19/4A/14604
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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  • 9
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    Online Resource
    Taxonomy of dinoflagellates, the genus Protoperidium (Archaeperidinium), in coastal waters of Vietnam
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2016
    In:  TAP CHI SINH HOC Vol. 38, No. 1 ( 2016-01-14)
    Details
    In: TAP CHI SINH HOC, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 38, No. 1 ( 2016-01-14)
    Type of Medium: Online Resource
    ISSN: 0866-7160 , 0866-7160
    URL: Article
    DOI: 10.15625/0866-7160/v38n1.7596
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2016
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  • 10
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    Online Resource
    A new record of rare dinoflagellate species 〈i〉Protoperidinium carum〈/i〉 (Abé, 1981) Balech, 1994 for Vietnamese waters and Southeast Asia region
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2020
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 20, No. 4 ( 2020-12-29), p. 447-455
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 20, No. 4 ( 2020-12-29), p. 447-455
    Abstract: Although there were a number of studies on the section Oceanica of the genus Protoperidinium, most of the published figures did not well revealed the clear features of the anterior intercalary plates. In this paper, Protoperidinium carum was re-described in details of cell morphology, plate patterns and thecal ornamentation, especially the second anterior intercalary plate (2a) is wide pentagonal instead of hexagonal type as in the previous descriptions. This species was illustrated with line drawing, light and scanning electron microscope photographs. P. carum was newly recorded in Southeast Asia and Vietnamese waters.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/15725
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2020
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