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  1. Article ; Online: Seasonal Change of Sediment Microbial Communities and Methane Emission in Young and Old Mangrove Forests in Xuan Thuy National Park.

    Ho, Cuong Tu / Tatsuya, Unno / Nguyen, Son Giang / Nguyen, Thi-Hanh / Dinh, Son Truong / Le, Son Tho / Pham, Thi-Minh-Hanh

    Journal of microbiology and biotechnology

    2023  Volume 34, Issue 3, Page(s) 580–588

    Abstract: 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 ( ... 17 years-old) mangroves have been ... ...

    Abstract 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) 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. However, this 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.
    MeSH term(s) Wetlands ; Ecosystem ; Bacteria/genetics ; Seasons ; Methane ; Parks, Recreational ; Microbiota ; Soil/chemistry
    Chemical Substances Methane (OP0UW79H66) ; Soil
    Language English
    Publishing date 2023-12-30
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2412195-2
    ISSN 1738-8872 ; 1738-8872
    ISSN (online) 1738-8872
    ISSN 1738-8872
    DOI 10.4014/jmb.2311.11050
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Microbial contamination in the coastal aquaculture zone of the Ba Lat river mouth, Vietnam.

    Le, Nhu Da / Hoang, Thi Thu Ha / Nguyen, Thi Mai Huong / Rochelle-Newall, Emma / Pham, Thi Minh Hanh / Phung, Thi Xuan Binh / Duong, Thi Thuy / Nguyen, Thi Anh Huong / Dinh, Le Minh / Duong, Thanh Nghi / Nguyen, Tien Dat / Le, Thi Phuong Quynh

    Marine pollution bulletin

    2023  Volume 192, Page(s) 115078

    Abstract: Contamination of aquaculture products by pathogenic organisms is a major concern in areas where this activity is of high economic importance. The abundances of total coliforms (TC), Escherichia coli (EC) and faecal streptococci (FS) (in CFU.100 ... ...

    Abstract Contamination of aquaculture products by pathogenic organisms is a major concern in areas where this activity is of high economic importance. The abundances of total coliforms (TC), Escherichia coli (EC) and faecal streptococci (FS) (in CFU.100 mL
    MeSH term(s) Wastewater ; Sewage ; Vietnam ; Escherichia coli ; Aquaculture ; Feces ; Gram-Negative Bacteria ; Environmental Monitoring/methods ; Water Microbiology
    Chemical Substances Wastewater ; Sewage
    Language English
    Publishing date 2023-05-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2001296-2
    ISSN 1879-3363 ; 0025-326X
    ISSN (online) 1879-3363
    ISSN 0025-326X
    DOI 10.1016/j.marpolbul.2023.115078
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Microplastics in sediments from urban and suburban rivers: Influence of sediment properties.

    Duong, Thi Thuy / Nguyen-Thuy, Duong / Phuong, Ngoc Nam / Ngo, Ha My / Doan, Thi Oanh / Le, Thi Phuong Quynh / Bui, Ha Manh / Nguyen-Van, Huong / Nguyen-Dinh, Thai / Nguyen, Thi Anh Nguyet / Cao, Thi Thanh Nga / Pham, Thi Minh Hanh / Hoang, Thu-Huong Thi / Gasperi, Johnny / Strady, Emilie

    The Science of the total environment

    2023  Volume 904, Page(s) 166330

    Abstract: Although sediments are considered to be a major sink for microplastics (MP), there is still a relative lack of knowledge on the factors that influence the occurrence and abundance of MP in riverine sediments. The present study investigated the occurrence ...

    Abstract Although sediments are considered to be a major sink for microplastics (MP), there is still a relative lack of knowledge on the factors that influence the occurrence and abundance of MP in riverine sediments. The present study investigated the occurrence and distribution of MP in riverine sediments collected at twelve sites representative of different populated and urbanized rivers (To Lich, Nhue and Day Rivers) located in the Red River Delta (RRD, Vietnam, during dry and rainy seasons. MP concentrations ranged from 1600 items kg
    Language English
    Publishing date 2023-08-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.166330
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Microbial contamination in the coastal aquaculture zone of the Ba Lat river mouth, Vietnam

    Le, Nhu Da / Hoang, Thi Thu Ha / Nguyen, Thi-Mai-Huong / Rochelle-Newall, Emma / Pham, Thi Minh Hanh / Phung, Thi Xuan Binh / Duong, Thi Thuy / Nguyen, Thi Anh Huong / Dinh, Le Minh / Duong, Thanh Nghi / Nguyễn, Tiến Đạt / Le, Thi Phuong Quynh

    Marine Pollution Bulletin. 2023 July, v. 192 p.115078-

    2023  

    Abstract: Contamination of aquaculture products by pathogenic organisms is a major concern in areas where this activity is of high economic importance. The abundances of total coliforms (TC), Escherichia coli (EC) and faecal streptococci (FS) (in CFU.100 mL⁻¹) in ... ...

    Abstract Contamination of aquaculture products by pathogenic organisms is a major concern in areas where this activity is of high economic importance. The abundances of total coliforms (TC), Escherichia coli (EC) and faecal streptococci (FS) (in CFU.100 mL⁻¹) in seawater in the Red River coastal aquaculture zone were determined. The results showed TC numbers (200 to 9100; average 1822), EC (<100 to 3400; average 469) and FS (<100 to 2100; average 384), of which TC exceeded the allowable threshold of the Vietnam regulation for coastal aquaculture water. TC and EC numbers in 4 wastewater types (domestic, livestock farming sewage, agricultural runoff, and mixed sewage canals) were investigated and revealed the importance of point sources of faecal contamination in seawater. These results underline the need to reduce the release of untreated wastewater and to put into place seawater microbial quality monitoring in areas where the development of sustainable aquaculture is an objective.
    Keywords Escherichia coli ; agricultural runoff ; livestock ; mariculture ; marine pollution ; microbial contamination ; microbiological quality ; seawater ; sewage ; wastewater ; Vietnam ; E. coli ; Faecal streptococci ; Faecal indicator bacterial (FIB) ; Aquaculture ; Human impacts ; Red River estuary ; Coastal zone
    Language English
    Dates of publication 2023-07
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 2001296-2
    ISSN 1879-3363 ; 0025-326X
    ISSN (online) 1879-3363
    ISSN 0025-326X
    DOI 10.1016/j.marpolbul.2023.115078
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  5. Article: Risk of eutrophication in the seawater of the coastal Red River aquaculture zone (Thai Binh province, Vietnam)

    Le, Nhu Da / Nguyen, Thi Hang / Duong, Thi Thuy / Rochelle-Newall, Emma / Hoang, Thi Thu Ha / Vu, Thi Huong / Pham, Thi Mai Huong / Nguyen, Thi Anh Huong / Dinh, Le Minh / Phung, Thi Xuan Binh / Nguyen, Tien Dat / Pham, Thi Minh Hanh / Dao, Viet Ha / Le, Thi Phuong Quynh

    Regional studies in marine science. 2022 Sept., v. 55

    2022  

    Abstract: Coastal aquaculture represents an important economic activity in many countries. Nutrient (N, P and Si) concentrations and phytoplankton diversity and abundance in the coastal aquaculture zone, Tien Hai district, Thai Binh province (North Vietnam) were ... ...

    Abstract Coastal aquaculture represents an important economic activity in many countries. Nutrient (N, P and Si) concentrations and phytoplankton diversity and abundance in the coastal aquaculture zone, Tien Hai district, Thai Binh province (North Vietnam) were investigated during 2019–2020. Nutrient concentrations in five types of wastewater were also determined. The mean Eutrophication Index value of surface seawater at the 9 studied sites varied from 0.27 to 0.52, ranking as oligotrophic to mesotrophic. Five phytoplankton groups were observed (Bacillariophyceae (62% relative abundance), Dinophyceae (16%), Chlorophyceae (11%), Cyanobacteria (7%), and Euglenophyceae (4%)). The temporal and spatial distribution of phytoplankton diversity and abundance was governed by water temperature, pH, TSS, and TP and reflected the strong interactions between seawater and riverine water in the area. The presence of certain potentially toxic algal species combined with increasing inorganic nitrogen concentrations and N:P ratios further underlined the risk for harmful algal blooms. The investigation of different nutrient sources in this area revealed that while nitrate and total phosphorus concentrations are related to diffuse sources, point sources may be important in providing ammonium and dissolved phosphate concentrations to coastal seawater in this aquaculture zone. These results provide a scientific basis upon which better management strategies can be constructed in order to assure the sustainable development of aquaculture in the Red River coastal area, in particular, and in the coast of Vietnam, in general.
    Keywords Bacillariophyceae ; Chlorophyceae ; Cyanobacteria ; Dinophyceae ; Euglenophyceae ; algae ; ammonium ; coastal water ; coasts ; eutrophication ; mariculture ; marine science ; nitrates ; nitrogen ; pH ; phosphates ; phytoplankton ; riparian areas ; risk ; seawater ; sustainable development ; total phosphorus ; toxicity ; wastewater ; water temperature ; Vietnam
    Language English
    Dates of publication 2022-09
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 2352-4855
    DOI 10.1016/j.rsma.2022.102587
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: A Simple Empirical Band-Ratio Algorithm to Assess Suspended Particulate Matter from Remote Sensing over Coastal and Inland Waters of Vietnam: Application to the VNREDSat-1/NAOMI Sensor

    Ngoc, Dat Dinh / Loisel, Hubert / Vantrepotte, Vincent / Chu Xuan, Huy / Nguyen Minh, Ngoc / Verpoorter, Charles / Meriaux, Xavier / Pham Thi Minh, Hanh / Le Thi, Huong / Le Vu Hong, Hai / Nguyen Van, Thao

    Water. 2020 Sept. 21, v. 12, no. 9

    2020  

    Abstract: VNREDSat-1 is the first Vietnamese satellite enabling the survey of environmental parameters, such as vegetation and water coverages or surface water quality at medium spatial resolution (from 2.5 to 10 m depending on the considered channel). The New ... ...

    Abstract VNREDSat-1 is the first Vietnamese satellite enabling the survey of environmental parameters, such as vegetation and water coverages or surface water quality at medium spatial resolution (from 2.5 to 10 m depending on the considered channel). The New AstroSat Optical Modular Instrument (NAOMI) sensor on board VNREDSat-1 has the required spectral bands to assess the suspended particulate matter (SPM) concentration. Because recent studies have shown that the remote sensing reflectance, Rᵣₛ(λ), at the blue (450–520 nm), green (530–600 nm), and red (620–690 nm) spectral bands can be assessed using NAOMI with good accuracy, the present study is dedicated to the development and validation of an algorithm (hereafter referred to as V1SPM) to assess SPM from Rᵣₛ(λ) over inland and coastal waters of Vietnam. For that purpose, an in-situ data set of hyper-spectral Rᵣₛ(λ) and SPM (from 0.47 to 240.14 g·m⁻³) measurements collected at 205 coastal and inland stations has been gathered. Among the different approaches, including four historical algorithms, the polynomial algorithms involving the red-to-green reflectance ratio presents the best performance on the validation data set (mean absolute percent difference (MAPD) of 18.7%). Compared to the use of a single spectral band, the band ratio reduces the scatter around the polynomial fit, as well as the impact of imperfect atmospheric corrections. Due to the lack of matchup data points with VNREDSat-1, the full VNREDSat-1 processing chain (atmospheric correction (RED-NIR) and V1SPM), aiming at estimating SPM from the top-of-atmosphere signal, was applied to the Landsat-8/OLI match-up data points with relatively low to moderate SPM concentration (3.33–15.25 g·m⁻³), yielding a MAPD of 15.8%. An illustration of the use of this VNREDSat-1 processing chain during a flooding event occurring in Vietnam is provided.
    Keywords algorithms ; data collection ; particulates ; reflectance ; surface water ; surveys ; vegetation ; water quality ; Vietnam
    Language English
    Dates of publication 2020-0921
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2521238-2
    ISSN 2073-4441
    ISSN 2073-4441
    DOI 10.3390/w12092636
    Database NAL-Catalogue (AGRICOLA)

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