Seasonal Change of Sediment Microbial Communities and Methane Emission in Young and Old Mangrove Forests in Xuan Thuy National Park Cuong Tu Ho, Unno Tatsuya, Son Giang Nguyen, Thi-Hanh Nguyen, Son Truong Dinh, et al. Journal of Microbiology and Biotechnology, 2024 Microbial communities in mangrove forests have recently been intensively investigated to explain the ecosystem function of mangroves. In this study, the soil microbial communities under young (<11 years-old mangroves) and old (>17 years-old) mangroves have been studied during dry and wet seasons. In addition, biogeochemical properties of sediments and methane emission from the two different mangrove ages were measured. The results showed that young and old mangrove soil microbial communities were significantly different on both seasons. Seasons seem to affect microbial communities more than the mangrove age does. Proteobacteria and Chloroflexi were two top abundant phyla showing >15%. Physio-chemical properties of sediment samples showed no significant difference between mangrove ages, seasons, nor depth levels, except for TOC showing significant difference between the two seasons. The methane emission rates from the mangroves varied depending on seasons and ages of the mangrove. This, however, did not show significant correlation with the microbial community shifts, suggesting that abundance of methanogens was not the driving factor for mangrove soil microbial communities.
Metagenomic investigation of the seasonal distribution of bacterial community and antibiotic-resistant genes in Day River Downstream, Ninh Binh, Vietnam S. Nguyen, Shahbaz Raza, Loan Thi Ta, Lan Anh Thi Le, C. T. Ho, et al. Applied Biological Chemistry, 2022 In this study, we use high-throughput sequencing-based metagenomic methods to investigate the differences in seasonal structures of the bacterial community and the abundance and diversity of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in both shrimp ponds and river water samples downstream of the Day River, Ninh Binh, Vietnam. The structure of the central bacterial community, ARGs, and MGEs was found to be regardless of the seasons and locations. The predominant phyla found in all samples was Proteobacteria , Bacteroidetes, and Actinobacteria . Multi-drug resistance (MDR) genes and transposases are the most dominant ARG types and MGEs, respectively. Our data showed a higher abundance of bacterial communities, ARGs, and MGEs in the river water during the rainy season. There is a significant correlation between the abundance of ARGs, MGEs, and environmental factors. Our results indicate that water environments containing ARGs/MGEs carrying bacteria pose a risk to shrimp and human health, especially during the rainfall-polluted water season.
A new Rhopalomeris species (Diplopoda: Glomerida: Glomeridae), and notes on the phylogenetic relationships between glomeridans in Vietnam ANH D. NGUYEN, SON G. NGUYEN, KATSUYUKI EGUCHI Zootaxa, 2021 A new pill millipede, Rhopalomeris nagao sp. nov., is described from Vietnam. It is recognized by the following combination of characters: antennal tip with numerous sensory cones; telopods with short prefemoral and femoral trichosteles, with long, straight and acute tuberculiform femoral process, and with shorter lobuliform tibial process; syncoxial lobe being slightly concave medially, syncoxial horns being longer than lobe. A fragment of the cytochrome c oxidase subunit I (COI) gene is also provided for the new species. The K2P genetic distance of the COI between the new species and other Vietnamese glomeridans is from 10.7% to 16.9%. Two genera, Hyperglomeris and Hyleoglomeris, are considered to be non-monophyletic, but more data and samples will be needed for confirmation.
Description of a new species of the Charaea coomani group (Coleoptera: Chrysomelidae: Galerucinae) from Vietnam with a key to species Dinh Nguyen, Loan Ho, Son Nguyen Biodiversity Data Journal, 2021 The genus Charaea Baly is distributed in the eastern Palaearctic, Himalayas, China and adjacent countries of the Oriental Region. Currently, 59 species of the genus Charaea have been recorded. The species of Charaea is characterised with a robust tubular aedeagus that terminates with a more or less distinct apical process with the Charaea coomani group having an internal sac with long sharp lateral sclerites. Up to now, 13 species of this group have been described in the Oriental Region, four of which are found in Vietnam. Charaea dinhcuongisp. nov. is described as a new species, based on specimens collected from Phu Quoc Island in southern Vietnam. Colour photographs of habitus and body details and DNA barcode sequences are presented. An identification key is provided for all Vietnamese species from the Charaea coomani group.
Hoya lamthanhiae (Asclepidoideae, apocynaceae), a new species from Southern Vietnam Van The Pham, Robert D. Kloppenburg, Leonid V. Averyanov, Giang Son Nguyen, Hoang Tuan Nguyen, et al. Pakistan Journal of Botany, 2020 Hoya lamthanhiae V.T. Pham & Kloppenb. is described and illustrated. The molecular data is provided; this species was found in Dak Lak province, southern Vietnam. Diagnostic features of the new species are a milky latex lithophytic vine and pure white with red-purple centre flowers. The described species clearly differs from closely related H. hainanensis in number of characters: a leaf blade shortly attenuated and wavy margins at the base, a hairy abaxial leaf surface, a bigger calyx with few sparse hairs or glabrous, a bigger corolla with acute lobe, shorter pollinia, as well as molecular characters.
On the millipede genus antheromorpha jeekel, 1968 (Diplopoda: Polydesmida: Paradoxosomatidae) from vietnam, with a description of a new species Raffles Bulletin of Zoology, 2018
TigerBase: A DNA registration system to enhance enforcement and compliance testing of captive tiger facilities KM Ewart, FT Sitam, NANBG Ali, R Ogden, KI Morgan, HM Tran, TPT Bui, ... Forensic Science International: Genetics 74, 103149 , 2025 2025 Citations: 3
Genetic variability of the endangered tropical species Hopea ferrea laness in forests revealed by microsatellite analysis TM Nguyen, HLP Nguyen, NT Hoang, TTP Nguyen, SG Nguyen, ... Tree Genetics & Genomes 20 (5), 25 , 2024 2024 Citations: 2
Seasonal change of sediment microbial communities and methane emission in young and old mangrove forests in Xuan Thuy National Park CT Ho, U Tatsuya, SG Nguyen, TH Nguyen, ST Dinh, ST Le, TMH Pham Journal of Microbiology and Biotechnology 34 (3), 580 , 2023 2023 Citations: 2
Study on fabrication and evaluation of some properties of zero-valence Fe/Cu bimetallic nanomaterials by green synthesis method S Nguyen, VN Toán, NV Hoàng, NTT Hương Journal of Military Science and Technology 92, 46-54 , 2023 2023
Metagenomic investigation of the seasonal distribution of bacterial community and antibiotic-resistant genes in Day River Downstream, Ninh Binh, Vietnam SG Nguyen, S Raza, LT Ta, LAT Le, CT Ho, T Unno Applied Biological Chemistry 65 (1), 26 , 2022 2022 Citations: 17
DNA analyses of large pangolin scale seizures: Species identification validation and case studies KM Ewart, AL Lightson, FT Sitam, J Rovie-Ryan, SG Nguyen, KI Morgan, ... Forensic Science International: Animals and Environments 1, 1-9 , 2021 2021 Citations: 34
Description of a new species of the Charaeacoomani group (Coleoptera: Chrysomelidae: Galerucinae) from Vietnam with a key to species DT Nguyen, LT Ho, SG Nguyen Biodiversity data journal 9, e72158 , 2021 2021 Citations: 5
The DNA barcodes for the species delimitation of the genus Tylopus Jeekel, 1968 in Vietnam (Diplopoda: Polydesmida: Paradoxosomatidae) N D.A., NT T.A., PT H.L., D T.H., N G.S. ACADEMIA JOURNAL OF BIOLOGY 43 (2), 37-45 , 2021 2021 Citations: 1
A new Rhopalomeris species (Diplopoda: Glomerida: Glomeridae), and notes on the phylogenetic relationships between glomeridans in Vietnam DA Nguyen, GS Nguyen, K Eguchi Zootaxa 4927 (2), 257-264 , 2021 2021 Citations: 10
Notes on the changes in body color with age in male and female Coeliccia mattii Phan & Kompier, 2016 (Odonata: Zygoptera: Platycnemididae) QT Phan, QP Ngo, AP Bui, HS Le, GS Nguyen International Dragonfly Fund Report 153, 1-6 , 2020 2020 Citations: 2
Investigation of salt-tolerant rhizosphere bacteria from seawater-intruding paddy rice field in Vietnam TC Ho, VC Bui, TT Lam, MH Tran, TTH Luong, TDP Pham, GS Nguyen, ... ACADEMIA JOURNAL OF BIOLOGY 42 (3), 95-109 , 2020 2020 Citations: 3
Hoya lamthanhiae (Asclepidoideae, Apocynaceae), a new species from southern Vietnam VT Pham, RD Kloppenburg, LV Averyanov, GS Nguyen, HT Nguyen, ... Pak. J. Bot. 52 (1) , 2020 2020 Citations: 4
On the millipede genus Antheromorpha Jeekel, 1968 (Diplopoda: Polydesmida: Paradoxosomatidae) from Vietnam, with a description of a new species DA Nguyen, GS Nguyen, XS Le The Raffles Bulletin of Zoology 66, 96-109 , 2018 2018 Citations: 10
Antibiotics Resistant Testing of Vibrio and Oxytetracycline Resistant Bacteria Isolated from Fish Farming Water in Jeju SG Nguyen, M Kim, J Kim, N Hwang, T Unno 한국미생물학회 학술대회논문집, 23-23 , 2016 2016
Effects of Freeze-drying Feces on 16S rRNA Based Microbial Community Analysis J Kim, N Hwang, M Kim, SG Nguyen, T Unno 한국미생물학회 학술대회논문집, 76-76 , 2016 2016
Effects of the Antibiotics Growth Promoter Tylosin on Swine Gut Microbiota J Kim, RB Guevarra, SG Nguyen, JH Lee, DK Jeong, T Unno Journal of Microbiology and Biotechnology 25 (4), 431-438 , 2016 2016 Citations: 49
메타게놈 분석을 이용한 돈분뇨 처리에 의한 논토양에서 메탄대사에 미치는 영향 조사 응우옌, 기앙손, 호투궝, 이지훈 Korean Journal of Microbiology 52 (2), 157-165 , 2016 2016
Food & Function SG Nguyen, J Kim, RB Guevarra, JH Lee, E Kim, S Kimd, T Unno 2016
DNA sequence variation at Intron 5 PIT-1 locus in bos GS Nguyen, VAK Do, HC Nguyen, TBN Tran, TDT Nguyen Tap chi KHKT Chan nuoi 209, 10-14 , 2016 2016
Metagenomics Analysis of Methane Metabolisms in Manure Fertilized Paddy Soil SG Nguyen, CT Ho, JH Lee, T Unno Korean Journal of Microbiology 52 (2), 157-165 , 2016 2016 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
Laminarin favorably modulates gut microbiota in mice fed a high-fat diet SG Nguyen, J Kim, RB Guevarra, JH Lee, E Kim, S Kim, T Unno Food & Function 7 (10), 4193-4201 , 2016 2016 Citations: 112
Analysis of swine fecal microbiota at various growth stages J Kim, SG Nguyen, RB Guevarra, I Lee, T Unno Archives of Microbiology , 2015 2015 Citations: 100
Influence of seawater intrusion on microbial communities in groundwater T Unno, J Kim, Y Kim, SG Nguyen, RB Guevarra, GP Kim, JH Lee, ... Science of the Total Environment 532, 337-343 , 2015 2015 Citations: 69
Effects of Antibiotic Growth Promoter and Characterization of Ecological Succession in Swine Gut Microbiota T Unno, J Kim, RB Guevarra, SG Nguyen Microbiology and Biotechnology 25 (4), 431-438 , 2015 2015 Citations: 61
Effects of the Antibiotics Growth Promoter Tylosin on Swine Gut Microbiota J Kim, RB Guevarra, SG Nguyen, JH Lee, DK Jeong, T Unno Journal of Microbiology and Biotechnology 25 (4), 431-438 , 2016 2016 Citations: 49
Genetic analysis of ORF5 porcine reproductive and respiratory syndrome virus isolated in Vietnam TDT Nguyen, TT Nguyen, GS Nguyen, TTH Le, KH Vo, TN Nguyen, ... Microbiology and immunology 57 (7), 518-526 , 2013 2013 Citations: 35
DNA analyses of large pangolin scale seizures: Species identification validation and case studies KM Ewart, AL Lightson, FT Sitam, J Rovie-Ryan, SG Nguyen, KI Morgan, ... Forensic Science International: Animals and Environments 1, 1-9 , 2021 2021 Citations: 34
Metagenomic investigation of the seasonal distribution of bacterial community and antibiotic-resistant genes in Day River Downstream, Ninh Binh, Vietnam SG Nguyen, S Raza, LT Ta, LAT Le, CT Ho, T Unno Applied Biological Chemistry 65 (1), 26 , 2022 2022 Citations: 17
Impacts of Initial Fertilizers and Irrigation Systems on Paddy Methanogens and Methane Emission SG Nguyen, RB Guevarra, J Kim, CT Ho, TV Mai, T Unno Water, Air, and Soil Pollution, 226:309 , 2015 2015 Citations: 16
Comparison of Fecal Microbial Communties between White and Black Pigs RB Guevarra, J Kim, SG Nguyen, T Unno Journal of Applied Biological Chemistry 58 (4), 369−375 , 2015 2015 Citations: 14
Phylogenetic relationships of the Panax samples collected in Lai Chau province based on matk and ITS-rDNA sequences KL Phan, DD Vu, KL Phan, GS Nguyen, TPT Nguyen, TML Le, TS Le Biotechnology 12 (2), 327-337 , 2014 2014 Citations: 11
A new Rhopalomeris species (Diplopoda: Glomerida: Glomeridae), and notes on the phylogenetic relationships between glomeridans in Vietnam DA Nguyen, GS Nguyen, K Eguchi Zootaxa 4927 (2), 257-264 , 2021 2021 Citations: 10
On the millipede genus Antheromorpha Jeekel, 1968 (Diplopoda: Polydesmida: Paradoxosomatidae) from Vietnam, with a description of a new species DA Nguyen, GS Nguyen, XS Le The Raffles Bulletin of Zoology 66, 96-109 , 2018 2018 Citations: 10
Description of a new species of the Charaeacoomani group (Coleoptera: Chrysomelidae: Galerucinae) from Vietnam with a key to species DT Nguyen, LT Ho, SG Nguyen Biodiversity data journal 9, e72158 , 2021 2021 Citations: 5
A new ginseng species Panax sp. (Araliaceae) in Vietnam TPT Nguyen, TS Le, GS Nguyen, KL Phan Pharmacy 426, 59-63 , 2011 2011 Citations: 5
Hoya lamthanhiae (Asclepidoideae, Apocynaceae), a new species from southern Vietnam VT Pham, RD Kloppenburg, LV Averyanov, GS Nguyen, HT Nguyen, ... Pak. J. Bot. 52 (1) , 2020 2020 Citations: 4
Molecular Characterization of Amentotaxus hatuyenensis N.T. Hiep (Taxaceae) Based on ITS1 Partial Sequence KL Phan, KL Phan, TML Le, GS Nguyen VNU Journal of Science: Natural Sciences and Technology 30 (3S), 46-52 , 2014 2014 Citations: 4
TigerBase: A DNA registration system to enhance enforcement and compliance testing of captive tiger facilities KM Ewart, FT Sitam, NANBG Ali, R Ogden, KI Morgan, HM Tran, TPT Bui, ... Forensic Science International: Genetics 74, 103149 , 2025 2025 Citations: 3
Investigation of salt-tolerant rhizosphere bacteria from seawater-intruding paddy rice field in Vietnam TC Ho, VC Bui, TT Lam, MH Tran, TTH Luong, TDP Pham, GS Nguyen, ... ACADEMIA JOURNAL OF BIOLOGY 42 (3), 95-109 , 2020 2020 Citations: 3
Molecular data and premilinary phylogeny of several Paradoxosomatid millipede species in Vietnam (DIPLOPODA: POLYDESMIDA: PARADOXOSOMATIDAE) DA Nguyen, GS Nguyen Biology 38 (2), 146-153 , 2016 2016 Citations: 3