LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 7 of total 7

Search options

  1. 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

    More links

    Kategorien

    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)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  2. Article: Tracing carbon transfer and assimilation by invertebrates and fish across a tropical mangrove ecosystem using stable isotopes

    Tue, Nguyen Tai / Tran Dang Quy / Mai Trong Nhuan / Luu Viet Dung / Nguyen Dinh Thai

    Marine ecology. 2017 Oct., v. 38, no. 5

    2017  

    Abstract: Mangroves are highly productive ecosystems that exhibit a diverse range of habitats, including tidal creeks and flats, forest gaps and interior forest with varying understory light intensity, tidal dynamics, geomorphological settings, and overall ... ...

    Abstract Mangroves are highly productive ecosystems that exhibit a diverse range of habitats, including tidal creeks and flats, forest gaps and interior forest with varying understory light intensity, tidal dynamics, geomorphological settings, and overall biological production. Within mangrove ecosystems, invertebrates and fish feed on heterogeneous food sources, the occurrence of which is unevenly distributed across the system. This provides a basis for testing models of carbon transfer across mangrove ecosystems. We hypothesized that the carbon transfer and assimilation by fish and invertebrates will vary across the different mangrove habitats and that such variations can be predicted by their stable isotope compositions. We analysed δ¹³C and δ¹⁵N signatures of consumers and their potential organic carbon sources across a tropical mangrove ecosystem in Vietnam. The δ¹³C values of crabs and snails significantly decreased from the tidal flat to interior forest, indicating that variations in carbon transfer and assimilation occurred at small scales <30 m. Reduced variation in δ¹³C of suspension‐feeding bivalves suggested that tidal water was a vector for large‐scale transport of carbon across the mangrove ecosystem. An analysis of co‐variance using habitat as a fixed factor and feeding habit and movement capacity of consumers as co‐variates indicated that habitat and feeding types were major features that affected the δ¹³C values of invertebrates and fish. The findings demonstrate that carbon transfer and assimilation across mangrove ecosystems occur as a diverse combination of small (<30 m) and large (>30 m) scale processes.
    Keywords Bivalvia ; analysis of covariance ; biological production ; canopy gaps ; crabs ; ecosystems ; fish ; fish feeds ; forests ; geomorphology ; habitats ; light intensity ; mangroves ; models ; nitrogen ; organic carbon ; snails ; stable isotopes ; streams ; suspension feeding ; understory ; Vietnam
    Language English
    Dates of publication 2017-10
    Size p. .
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2020745-1
    ISSN 1439-0485 ; 0173-9565
    ISSN (online) 1439-0485
    ISSN 0173-9565
    DOI 10.1111/maec.12460
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  3. Article ; Online: A high-resolution, 1250-year long drought record from Ea Tyn Lake, Central Highlands of Việt Nam

    Nguyễn-Đình, Thái / Nguyễn, Thùy Dương / Nguyễn, Văn Hưởng / Ojala, Antti EK / Đỗ-Trọng, Quốc / Phan-Thanh, Tùng / Nguyễn, Thị Hồng / Thị Ánh Nguyễn, Nguyệt / Xuân Đinh, Thành / Thị Huyền Nguyễn, Trang / Sauer, Peter E / Schimmelmann, Arndt / Unkel, Ingmar

    The Holocene. 2022 Oct., v. 32, no. 10 p.1026-1040

    2022  

    Abstract: An understanding of past climatic variability at regional to local scales is mandatory for a proper evaluation of current and potential future repercussions from global climate change. The Southeast Asian tropics remain severely under-represented in ... ...

    Abstract An understanding of past climatic variability at regional to local scales is mandatory for a proper evaluation of current and potential future repercussions from global climate change. The Southeast Asian tropics remain severely under-represented in paleoenvironmental and paleoclimatic reconstructions, although a few recent paleoclimate studies evaluated the variability, position and strength of the main Asian monsoon systems at different timescales from modern records to the last 15,000 years. Comparable data from Việt Nam, however, are scarce although Việt Nam and its Central Highlands are critically located at the intersection of the East Asian Summer Monsoon and the Indian Summer Monsoon with highly important socio-ecological consequences from changes in the climate system. This study presents a high-resolution sedimentary climate record from Ea Tyn Lake in Việt Nam’s Central Highlands covering the last 1250 years. Using geochemical and sedimentological proxies and principal component analysis, we reconstructed at least 12 drought events, some of which appear to be of supraregional significance as they coincide with historically documented droughts in India, China, and Cambodia. Beyond tracking short-term climate events, the Rb/Sr elemental ratio along the Ea Tyn Lake sediment sequence reflects long-term monsoon variability throughout the last millenium, which was previously only reconstructed via δ¹⁸O speleothem records from China and India. Our Ea Tyn Lake record shows that the East Asian Summer Monsoon was relatively strong between ~1000 and 1350 cal CE and weaker between 1350 and 1850 cal CE, followed by renewed intensification after ~1850 cal CE.
    Keywords Holocene epoch ; climate ; climate change ; drought ; lakes ; meteorological data ; monsoon season ; paleoclimatology ; paleoecology ; principal component analysis ; sediments ; Cambodia ; China ; India ; geochemistry ; lake sediment ; Late-Holocene ; paleoclimate ; Southeast Asia ; XRF
    Language English
    Dates of publication 2022-10
    Size p. 1026-1040.
    Publishing place SAGE Publications
    Document type Article ; Online
    ZDB-ID 2027956-5
    ISSN 1477-0911 ; 0959-6836
    ISSN (online) 1477-0911
    ISSN 0959-6836
    DOI 10.1177/09596836221106967
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  4. Article ; Online: Environmental history recorded over the last 70 years in Biển Hồ maar sediment, Central Highlands of Vietnam

    Nguyễn, Văn Hưởng / Schimmelmann, Jan P. / Nguyễn, Thùy Dương / Ojala, Antti E.K. / Unkel, Ingmar / Nguyễn-Đình, Thái / Fukumoto, Yu / Doiron, Kelsey E. / Sauer, Peter E. / Drobniak, Agnieszka / Ánh Nguyễn, Nguyệt Thị / Nguyễn-Thùy, Dương / Đỗ-Trọng, Quốc / Nguyễn, Thị Hồng / Nguyễn, Anh Dương / Nguyễn, Văn Tạo / Schimmelmann, Arndt

    Quaternary international. 2022 May 30, v. 621 p.84-100

    2022  

    Abstract: Global warming enhances atmospheric moisture loading and will likely affect the East-Asian monsoon system across Vietnam. The absence of a long written climate history from Vietnam creates a reliance on geological archives of past monsoon history and ... ...

    Abstract Global warming enhances atmospheric moisture loading and will likely affect the East-Asian monsoon system across Vietnam. The absence of a long written climate history from Vietnam creates a reliance on geological archives of past monsoon history and regional paleoenvironmental changes to provide a framework for evaluating current climatic trends. Biển Hồ lake (14°03′ N, 108°00′ E) is a volcanic crater (i.e. maar) in Vietnam's Central Highlands that has been accumulating sediment since the Pleistocene. Field campaigns between 2016 and 2018 recovered an abundance of gravity and piston sediment cores extending to a depth of ~15 m, covering approximately the last 30 ka BP. The paleoenvironmental interpretation of Pleistocene and Holocene sediment requires knowledge of modern lacustrine and sedimentary conditions, as well as the origin and transport pathways of the catchment material. Here, we focus on a high-resolution sedimentological and geochemical reconstruction of the recent environmental history - from 1950 AD to the present - based on sediment cores from Biển Hồ maar, in direct comparison with local and regional weather and historic records. The uppermost sedimentary record reflects a substantial anthropogenic influence such as deforestation, military use, crater breaching, dam and sill construction, and reforestation that strongly modified the maar's morphology and hydrology. A strong increase in sedimentation rate during the 1960–70s in Biển Hồ cores coincided with U.S. military activities and water withdrawal. A breach in the maar's rim and the connection to a new external reservoir in 1983-1984 AD increased Biển Hồ water level. Reforestation around most of Biển Hồ’s rim in the 1990s curbed erosion and sedimentation rate. Nutrient availability in Biển Hồ declined in the past ~10 years after the installation of a concrete sill between Biển Hồ and the reservoir to limit water exchange with the more nutrient-rich reservoir. This paper is a calibration study on modern sediment to provide an empirical basis for the interpretation of Biển Hồ’s deeper Holocene and pre-Holocene sedimentary record.
    Keywords Holocene epoch ; Pleistocene epoch ; anthropogenic activities ; climate ; deforestation ; gravity ; hydrology ; lakes ; monsoon season ; nutrient availability ; paleoecology ; reforestation ; sedimentation rate ; sediments ; watersheds ; weather ; Vietnam ; Catchment ; Central highlands ; Historic records ; Maar ; Paleoenvironment ; Sediment coring
    Language English
    Dates of publication 2022-0530
    Size p. 84-100.
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ISSN 1040-6182
    DOI 10.1016/j.quaint.2020.05.013
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Excessive radon-based radiation in indoor air caused by soil building materials in traditional homes on Đồng Văn karst plateau, northern Vietnam.

    Nguyễn-Văn, Hướng / Nguyễn-Thùy, Dương / Nguyễn, Nguyệt Thị Ánh / Streil, Thomas / Schimmelmann, Jan P / Doiron, Kelsey E / Nguyễn-Đình, Thái / Nguyễn-Thị, Hồng / Schimmelmann, Arndt

    Chemosphere

    2020  Volume 257, Page(s) 127119

    Abstract: Radon-based radiation from natural soil building materials is an important factor likely influencing residents' health as a contributing source of natural radiation. This survey aims to quantify the nuclide-specific α-radiation of ... ...

    Abstract Radon-based radiation from natural soil building materials is an important factor likely influencing residents' health as a contributing source of natural radiation. This survey aims to quantify the nuclide-specific α-radiation of isotopes
    MeSH term(s) Air Pollutants, Radioactive/analysis ; Air Pollution, Indoor/analysis ; Air Pollution, Indoor/statistics & numerical data ; Background Radiation ; Construction Materials ; Housing/statistics & numerical data ; Humans ; Radiation Monitoring ; Radon/analysis ; Soil ; Vietnam
    Chemical Substances Air Pollutants, Radioactive ; Soil ; Radon (Q74S4N8N1G)
    Language English
    Publishing date 2020-05-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2020.127119
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 2540: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  6. Article: Excessive radon-based radiation in indoor air caused by soil building materials in traditional homes on Đồng Văn karst plateau, northern Vietnam

    Nguyễn-Văn, Hướng / Nguyễn-Thùy, Dương / Nguyễn, Nguyệt Thị Ánh / Streil, Thomas / Schimmelmann, Jan P / Doiron, Kelsey E / Nguyễn-Đình, Thái / Nguyễn-Thị, Hồng / Schimmelmann, Arndt

    Chemosphere. 2020 Oct., v. 257

    2020  

    Abstract: Radon-based radiation from natural soil building materials is an important factor likely influencing residents’ health as a contributing source of natural radiation. This survey aims to quantify the nuclide-specific α-radiation of isotopes ²²²Rn and ²²⁰ ... ...

    Abstract Radon-based radiation from natural soil building materials is an important factor likely influencing residents’ health as a contributing source of natural radiation. This survey aims to quantify the nuclide-specific α-radiation of isotopes ²²²Rn and ²²⁰Rn in common types of houses in a region of northern Vietnam, Đồng Văn karst plateau, to preliminarily (i) evaluate the total annual effective dose rates and (ii) assess the relative risk of cancer induction from indoor α-radiation for inhabitants. The average ²²²Rn concentrations in all house types were lower than 100 Bq m⁻³, but ²²⁰Rn abundances were far higher than ²²²Rn, even up to >1000 Bq m⁻³ in air close to a wall of unfired-soil bricks. The estimated total annual effective dose rates from indoor ²²²Rn and ²²⁰Rn and their progenies to residents with daily exposure of 13 h in the various types of houses range from 3.1 to 4.3 mSv a⁻¹ for houses constructed with modified materials, but up to higher than 6 mSv a⁻¹ in houses with raw building materials. The average risk of developing lung cancer as a consequence of a lifetime exposure to indoor α-radiation in affected homes ranges from 3.9% to 14.6%. ²²⁰Rn and its metallic progenies contribute more than 80% of the total average lung cancer risk from total radon, being responsible for a range of 2.7–14.6% of the risk of developing lung cancer.
    Keywords air ; bricks ; chronic exposure ; construction materials ; dosage ; isotopes ; karsts ; lung neoplasms ; plateaus ; radon ; relative risk ; soil ; surveys ; Vietnam
    Language English
    Dates of publication 2020-10
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-light
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2020.127119
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 2540: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  7. Article: Sedimentary composition and organic carbon sources in mangrove forests along the coast of northeast Vietnam

    Tue, Nguyen Tai / Dang Minh Quan / Luu Viet Dung / Mai Trong Nhuan / Nguyen Dinh Thai / Pham Thao Nguyen / Tran Dang Quy

    Regional studies in marine science. 2018 Jan., v. 17

    2018  

    Abstract: The objective of this research was to examine the patterns of sedimentation and sedimentary organic carbon content in mangrove forests along the coast of northeast Vietnam. Stable isotope ratios (δ13C), C/N ratios, and sediment texture (sediment grain ... ...

    Abstract The objective of this research was to examine the patterns of sedimentation and sedimentary organic carbon content in mangrove forests along the coast of northeast Vietnam. Stable isotope ratios (δ13C), C/N ratios, and sediment texture (sediment grain size, sorting, skewness and sediment facies) were analyzed in three sediment cores from different mangrove forests. Results showed that sediments were mainly composed of fine sand, silt, and clay. Mud content decreased from estuarine islets through to the fringe, and to riverine mangrove forests. Total organic carbon (TOC) content, δ13C values, and C/N ratios ranged from 0.3 to 6.8%, –30.1 to −24.9‰, and 12 to 42, respectively. Results from bivariate analysis of sedimentary parameters clearly indicated that hydrological energy in the riverine mangrove forest was relatively lower than that observed from the fringe and estuarine islet mangrove forests. Co-variation between δ13C and C/N ratios showed that sedimentary organic carbon in riverine mangrove forests mainly originated from mangrove organic matter, while fringe and estuarine islet mangrove forests tended to accumulate higher proportions of marine phytoplankton. Results underscored the significance of mangrove stands and geomorphological settings in influencing sedimentation and organic carbon burial processes in mangrove sediments.
    Keywords bivariate analysis ; carbon nitrogen ratio ; clay ; coasts ; energy ; estuaries ; hydrology ; mangrove forests ; marine science ; organic carbon ; organic matter ; phytoplankton ; sand ; silt ; stable isotopes ; texture ; Vietnam
    Language English
    Dates of publication 2018-01
    Size p. 87-94.
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 2352-4855
    DOI 10.1016/j.rsma.2017.12.001
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top