Rapid industrial growth,urbanization,and agricultural activities have led to the discharge of large volumes of pollutants into coastal environments,raising levels of metals such as arsenic(As),cadmium(Cd),and mercury(...Rapid industrial growth,urbanization,and agricultural activities have led to the discharge of large volumes of pollutants into coastal environments,raising levels of metals such as arsenic(As),cadmium(Cd),and mercury(Hg)in water and sediments.Bivalve molluscs,such as Meretrix lyrata and Saccostrea glomerata can accumulate high amounts of toxic heavy metals in their tissues that pose potential risks to human health.They are frequently used as bioindicators due to their filter-feeding behavior and high accumulation potential.This study evaluates heavy metal accumulation in bivalve molluscs from Northeastern Vietnam,including Quang Ninh Province and Hai Phong City.In this study,a systematic literature review was conducted,combined with a bibliometric analysis,to synthesize and evaluate data on heavy metal accumulation in bivalve molluscs from Northeastern Vietnam.The analysis results showed bio-concentration factors exceeding 1,000 for As,Cd,and Hg in certain species,particularly in samples from Quang Ninh Province.Meanwhile,sediment accumulation factors(BSAF)were lower,suggesting that waterborne pathways predominantly contribute to heavy metal uptake.These findings highlight significant food safety risks due to toxic metal accumulation in seafood resources,emphasizing the urgent need for continuous monitoring and the establishment of local safety standards.The study provides important scientific evidence to support marine environmental management and public health protection.展开更多
Vietnam,with its twenty-eight coastal provinces,is one of the nations most profoundly affected by the adverse impacts of climate change(CC).These provinces face severe challenges as they contend with the escalating ef...Vietnam,with its twenty-eight coastal provinces,is one of the nations most profoundly affected by the adverse impacts of climate change(CC).These provinces face severe challenges as they contend with the escalating effects of CC,including rising sea levels,typhoons,flooding,and droughts.In this context,this article aims to assess the vulnerability of households'livelihoods in Quang Nam Province by applying the Livelihood Vulnerability Index(LVI)developed by Hahn et al.,along with the Intergovernmental Panel on Climate Change framework(LVI-IPCC).The study utilises five sources of household capital—human,social,physical,natural,and financial—to construct its indices.The data for this article is based on a survey of 200 households.The research methodology combines both quantitative and qualitative methods,including questionnaire interviews,in-depth interviews,and focus group discussions.The research period spans from 2021 to 2023.The study results revealed that the household LVI was 0.371,while the LVI-IPCC was 0.086,highlighting the critical need for access to food and clean water,which scored 0.458 and 0.351,respectively.The research underscores how CC significantly affects the livelihoods of coastal communities,particularly in sectors such as fishing,aquaculture,and agriculture.The study concludes that CC poses significant challenges to the livelihoods of coastal communities in Quang Nam Province and that adaptation measures are necessary to support these communities.The research highlights the importance of livelihood diversification,job transformation,and improving knowledge and skills to enhance the resilience of coastal communities to CC.展开更多
巢式关联作图(Nested Association Mapping,NAM)群体在作物学遗传与育种研究中具有广泛的应用。本研究在前期大豆种质资源评价基础上,利用35份不同地区来源的代表性种质与中豆41(公共母本)杂交,构建了一套大豆NAM群体。PCA和聚类分析发...巢式关联作图(Nested Association Mapping,NAM)群体在作物学遗传与育种研究中具有广泛的应用。本研究在前期大豆种质资源评价基础上,利用35份不同地区来源的代表性种质与中豆41(公共母本)杂交,构建了一套大豆NAM群体。PCA和聚类分析发现,不同亲本组合的RIL群体基本聚在一起,显示出清晰的遗传结构。利用该NAM群体亲本间花色和种皮色具有显著差异的RIL群体进行全基因组关联分析,定位到1个主要位点qFC13-1与花色显著关联,该位点与W1位点重合;定位到12个位点与种皮色显著相关,其中9个位点为3种以上方法共定位,3个位点为2种方法共定位,包括4个已知位点和8个新位点。研究结果表明,构建的NAM群体适于进行大豆相关性状遗传分析,为大豆复杂性状的遗传解析和育种实践提供了良好的基础材料。展开更多
文摘Rapid industrial growth,urbanization,and agricultural activities have led to the discharge of large volumes of pollutants into coastal environments,raising levels of metals such as arsenic(As),cadmium(Cd),and mercury(Hg)in water and sediments.Bivalve molluscs,such as Meretrix lyrata and Saccostrea glomerata can accumulate high amounts of toxic heavy metals in their tissues that pose potential risks to human health.They are frequently used as bioindicators due to their filter-feeding behavior and high accumulation potential.This study evaluates heavy metal accumulation in bivalve molluscs from Northeastern Vietnam,including Quang Ninh Province and Hai Phong City.In this study,a systematic literature review was conducted,combined with a bibliometric analysis,to synthesize and evaluate data on heavy metal accumulation in bivalve molluscs from Northeastern Vietnam.The analysis results showed bio-concentration factors exceeding 1,000 for As,Cd,and Hg in certain species,particularly in samples from Quang Ninh Province.Meanwhile,sediment accumulation factors(BSAF)were lower,suggesting that waterborne pathways predominantly contribute to heavy metal uptake.These findings highlight significant food safety risks due to toxic metal accumulation in seafood resources,emphasizing the urgent need for continuous monitoring and the establishment of local safety standards.The study provides important scientific evidence to support marine environmental management and public health protection.
基金supported by the"Vietnam Sea for the Goals of National Defence and National Development"project managed by the Office of the Vietnam Academy of Social Sciences。
文摘Vietnam,with its twenty-eight coastal provinces,is one of the nations most profoundly affected by the adverse impacts of climate change(CC).These provinces face severe challenges as they contend with the escalating effects of CC,including rising sea levels,typhoons,flooding,and droughts.In this context,this article aims to assess the vulnerability of households'livelihoods in Quang Nam Province by applying the Livelihood Vulnerability Index(LVI)developed by Hahn et al.,along with the Intergovernmental Panel on Climate Change framework(LVI-IPCC).The study utilises five sources of household capital—human,social,physical,natural,and financial—to construct its indices.The data for this article is based on a survey of 200 households.The research methodology combines both quantitative and qualitative methods,including questionnaire interviews,in-depth interviews,and focus group discussions.The research period spans from 2021 to 2023.The study results revealed that the household LVI was 0.371,while the LVI-IPCC was 0.086,highlighting the critical need for access to food and clean water,which scored 0.458 and 0.351,respectively.The research underscores how CC significantly affects the livelihoods of coastal communities,particularly in sectors such as fishing,aquaculture,and agriculture.The study concludes that CC poses significant challenges to the livelihoods of coastal communities in Quang Nam Province and that adaptation measures are necessary to support these communities.The research highlights the importance of livelihood diversification,job transformation,and improving knowledge and skills to enhance the resilience of coastal communities to CC.
文摘巢式关联作图(Nested Association Mapping,NAM)群体在作物学遗传与育种研究中具有广泛的应用。本研究在前期大豆种质资源评价基础上,利用35份不同地区来源的代表性种质与中豆41(公共母本)杂交,构建了一套大豆NAM群体。PCA和聚类分析发现,不同亲本组合的RIL群体基本聚在一起,显示出清晰的遗传结构。利用该NAM群体亲本间花色和种皮色具有显著差异的RIL群体进行全基因组关联分析,定位到1个主要位点qFC13-1与花色显著关联,该位点与W1位点重合;定位到12个位点与种皮色显著相关,其中9个位点为3种以上方法共定位,3个位点为2种方法共定位,包括4个已知位点和8个新位点。研究结果表明,构建的NAM群体适于进行大豆相关性状遗传分析,为大豆复杂性状的遗传解析和育种实践提供了良好的基础材料。
