Pub Date : 2024-11-20DOI: 10.1016/j.marpolbul.2024.117291
C. Marisa R. Almeida , Rafaela Perdigão , Bárbara Ribeiro Correia , Henry Van Der Gracht , Sofia Dias , Catarina Magalhães , Maria F. Carvalho , Ana P. Mucha , Francisca Espincho , Sandra Ramos
This study aimed to evaluate metals and polycyclic aromatic hydrocarbons (PAHs) adsorption on new plastic fishing nets in both laboratory and quasi-real scenario (nets submersed in marina seawater) experiments as well as in situ monitoring of these contaminants in water and sediments in lost fishing gears hotspots. The latter was inconclusive as environmental contaminants levels were very low. Laboratory experiments showed metals (copper and lead) and PAHs adsorption depended on the thickness and polymeric composition of the net, being lower in thinner nylon nets. Experiments in the marina, also showed significant contaminants adsorption, which increased over time, probably due to biofilm formation on net surface. This work showed the potential role of fishing gears as skins of pollutants, increasing organisms' exposition to contaminants present in the environment. So, initiatives to prevent the loss of fishing gear and to retrieve them are needed to reduce and/or eliminate their environmental impact.
{"title":"Potential of fishing nets for adsorption of inorganic (Cu and Pb) and organic (PAHs) pollutants","authors":"C. Marisa R. Almeida , Rafaela Perdigão , Bárbara Ribeiro Correia , Henry Van Der Gracht , Sofia Dias , Catarina Magalhães , Maria F. Carvalho , Ana P. Mucha , Francisca Espincho , Sandra Ramos","doi":"10.1016/j.marpolbul.2024.117291","DOIUrl":"10.1016/j.marpolbul.2024.117291","url":null,"abstract":"<div><div>This study aimed to evaluate metals and polycyclic aromatic hydrocarbons (PAHs) adsorption on new plastic fishing nets in both laboratory and quasi-real scenario (nets submersed in marina seawater) experiments as well as in situ monitoring of these contaminants in water and sediments in lost fishing gears hotspots. The latter was inconclusive as environmental contaminants levels were very low. Laboratory experiments showed metals (copper and lead) and PAHs adsorption depended on the thickness and polymeric composition of the net, being lower in thinner nylon nets. Experiments in the marina, also showed significant contaminants adsorption, which increased over time, probably due to biofilm formation on net surface. This work showed the potential role of fishing gears as skins of pollutants, increasing organisms' exposition to contaminants present in the environment. So, initiatives to prevent the loss of fishing gear and to retrieve them are needed to reduce and/or eliminate their environmental impact.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117291"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142686736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-20DOI: 10.1016/j.marpolbul.2024.117266
Sachin Budakoti
The Baltic Sea highly susceptible to the proliferation of Phytoplankton blooms. Present work examines the long-term trend and spatio-temporal variability of satellite derived chlorophyll concentration (Chl a) in the Baltic Sea during the period 2004–2021. Furthermore, the influence of water quality and meteorological parameters on Baltic Sea primary productivity has been analyzed using robust Generalized Additive Models (GAM) and Granger Causality statistical test. Statistically significant increasing trend in chlorophyll a concentration is observed in the Baltic Sea at the 95 % confidence interval. GAM model reveals that the most significant controlling factor is sea surface temperature (p < 0.0001), followed by nitrate and phosphate. Both GAM and Granger Causality tests confirm that water quality parameters are the major drivers in limiting the growth of Phytoplankton blooms in the Baltic Sea. Summer bloom shows in-phase relationship with Sea surface temperature and out of phase relationship with the phosphate nutrient.
波罗的海极易受到浮游植物大量繁殖的影响。本研究探讨了 2004-2021 年期间波罗的海卫星得出的叶绿素浓度（Chl a）的长期趋势和时空变异性。此外，还利用稳健的广义相加模型（GAM）和格兰杰因果关系统计检验法分析了水质和气象参数对波罗的海初级生产力的影响。据统计，在 95% 的置信区间内，波罗的海叶绿素 a 浓度呈明显上升趋势。GAM 模型显示，最重要的控制因素是海面温度（p
{"title":"Examining the impact of water quality and meteorological drivers on primary productivity in the Baltic Sea","authors":"Sachin Budakoti","doi":"10.1016/j.marpolbul.2024.117266","DOIUrl":"10.1016/j.marpolbul.2024.117266","url":null,"abstract":"<div><div>The Baltic Sea highly susceptible to the proliferation of Phytoplankton blooms. Present work examines the long-term trend and spatio-temporal variability of satellite derived chlorophyll concentration (Chl a) in the Baltic Sea during the period 2004–2021. Furthermore, the influence of water quality and meteorological parameters on Baltic Sea primary productivity has been analyzed using robust Generalized Additive Models (GAM) and Granger Causality statistical test. Statistically significant increasing trend in chlorophyll <em>a</em> concentration is observed in the Baltic Sea at the 95 % confidence interval. GAM model reveals that the most significant controlling factor is sea surface temperature (<em>p</em> < 0.0001), followed by nitrate and phosphate. Both GAM and Granger Causality tests confirm that water quality parameters are the major drivers in limiting the growth of Phytoplankton blooms in the Baltic Sea. Summer bloom shows in-phase relationship with Sea surface temperature and out of phase relationship with the phosphate nutrient.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117266"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study extensively investigated the abundance of microplastics in Thiruvottiyur coastal area of Chennai, India, before and after Cyclone Michaung. The results demonstrated a significant correlation between microplastic distribution and aftermath rainfall. The concentration of microplastics in sediments increased from 150 ± 48 particles kg−1 to 186 ± 21 particles kg−1 after the cyclone. In seawater, the concentration rose from 1.28 particles L−1 to 3.65 particles L−1, respectively. Heavy metals such as Al, Mg, Zn, Cr, Pb, Cu, Cd, Co, and As were detected on the surface of microplastics, demonstrating their vectorization potential for co-contaminants. After exposure, these microplastics induced oxidative stress in Artemia franciscana with increased superoxide dismutase (SOD), catalase, and reactive oxygen species (ROS). Fluctuations in weather conditions lead to heterogeneous changes in microplastic distribution, revealing the seasonal dynamics of microplastics. This study will provide background information to devise strategies for mitigating microplastic pollution in the marine environment.
{"title":"Effect of seasonal dynamics on microplastic pollution and its vectorization of heavy metals: An in-vitro toxicity assessment in Artemia franciscana","authors":"Balamurugan Thangamari Vengatesh, Natarajan Chandrasekaran, Amitava Mukherjee","doi":"10.1016/j.marpolbul.2024.117294","DOIUrl":"10.1016/j.marpolbul.2024.117294","url":null,"abstract":"<div><div>This study extensively investigated the abundance of microplastics in Thiruvottiyur coastal area of Chennai, India, before and after Cyclone Michaung. The results demonstrated a significant correlation between microplastic distribution and aftermath rainfall. The concentration of microplastics in sediments increased from 150 ± 48 particles kg<sup>−1</sup> to 186 ± 21 particles kg<sup>−1</sup> after the cyclone. In seawater, the concentration rose from 1.28 particles L<sup>−1</sup> to 3.65 particles L<sup>−1</sup>, respectively. Heavy metals such as Al, Mg, Zn, Cr, Pb, Cu, Cd, Co, and As were detected on the surface of microplastics, demonstrating their vectorization potential for co-contaminants. After exposure, these microplastics induced oxidative stress in <em>Artemia franciscana</em> with increased superoxide dismutase (SOD), catalase, and reactive oxygen species (ROS). Fluctuations in weather conditions lead to heterogeneous changes in microplastic distribution, revealing the seasonal dynamics of microplastics. This study will provide background information to devise strategies for mitigating microplastic pollution in the marine environment.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117294"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.marpolbul.2024.117315
Cara H Crichton, Samantha M Ladewig, Simon F Thrush
Microplastics are everywhere, including marine sediment. In this study, we evaluated the degradation of polyester, rayon, and cotton sewing threads over nine months when buried in marine sediment in Waitematā Harbour, Auckland, New Zealand. Polyester tensile strength was tested pre- and post-burial to track changes over time. Fourier-transform infrared spectroscopy (FTIR) analysis enabled the examination of the change to the chemical structural integrity of the polyester molecules over time. After one month, rayon and cotton degraded and were invisible to the eye, while visible signs of polyester degradation were apparent after 6 months of burial. This was confirmed by both tensile strength testing and FTIR chemical analysis. While microplastic pollution remains a serious problem, these findings show that at least one type of common plastic does degrade when buried in marine sediments. This likely has implications for seafloor ecosystem functionality and provides hope for plastic circular economy infrastructure.
{"title":"Polyester fibres slowly degrade in marine sediments.","authors":"Cara H Crichton, Samantha M Ladewig, Simon F Thrush","doi":"10.1016/j.marpolbul.2024.117315","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2024.117315","url":null,"abstract":"<p><p>Microplastics are everywhere, including marine sediment. In this study, we evaluated the degradation of polyester, rayon, and cotton sewing threads over nine months when buried in marine sediment in Waitematā Harbour, Auckland, New Zealand. Polyester tensile strength was tested pre- and post-burial to track changes over time. Fourier-transform infrared spectroscopy (FTIR) analysis enabled the examination of the change to the chemical structural integrity of the polyester molecules over time. After one month, rayon and cotton degraded and were invisible to the eye, while visible signs of polyester degradation were apparent after 6 months of burial. This was confirmed by both tensile strength testing and FTIR chemical analysis. While microplastic pollution remains a serious problem, these findings show that at least one type of common plastic does degrade when buried in marine sediments. This likely has implications for seafloor ecosystem functionality and provides hope for plastic circular economy infrastructure.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 Pt B","pages":"117315"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.marpolbul.2024.117281
W.N. Chong , G. Adiana , I.N. Baharom , B.Y. Kamaruzzaman , N.D. Takarina , M.C. Ong
Heavy metal pollution in aquatic ecosystems can lead to harmful accumulation in organisms like stingrays, posing potential health risks to humans. To assess this risk, 45 stingrays were sampled from Johor Waters (Pontian, Muar, and Batu Pahat) and analyzed for heavy metal content using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The average concentrations of Cu, Zn, As, Cd, Pb, and Hg in the fillets were 0.982±0.637, 31.3±5.93, 93.57±24.5, 0.039±0.047, 0.158±0.036, and 0.592±0.424 μg/g dw, respectively. Arsenic (As) was found at the highest concentration. The study indicates that fish size does not directly influence heavy metal accumulation and that metal levels vary by location. Calculated consumption limits for different metals are crucial for human safety. This data is valuable for evaluating contamination risks and guiding future research to protect marine ecosystems in Johor Waters.
{"title":"Level of heavy metals in marine stingrays (chondrichthyes: dasyatidae) landed from Johor Waters, Malaysia","authors":"W.N. Chong , G. Adiana , I.N. Baharom , B.Y. Kamaruzzaman , N.D. Takarina , M.C. Ong","doi":"10.1016/j.marpolbul.2024.117281","DOIUrl":"10.1016/j.marpolbul.2024.117281","url":null,"abstract":"<div><div>Heavy metal pollution in aquatic ecosystems can lead to harmful accumulation in organisms like stingrays, posing potential health risks to humans. To assess this risk, 45 stingrays were sampled from Johor Waters (Pontian, Muar, and Batu Pahat) and analyzed for heavy metal content using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The average concentrations of Cu, Zn, As, Cd, Pb, and Hg in the fillets were 0.982±0.637, 31.3±5.93, 93.57±24.5, 0.039±0.047, 0.158±0.036, and 0.592±0.424 μg/g dw, respectively. Arsenic (As) was found at the highest concentration. The study indicates that fish size does not directly influence heavy metal accumulation and that metal levels vary by location. Calculated consumption limits for different metals are crucial for human safety. This data is valuable for evaluating contamination risks and guiding future research to protect marine ecosystems in Johor Waters.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117281"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.marpolbul.2024.117275
Nicole E. Heshka, Christine Ridenour , Nayereh Saborimanesh, Qin Xin, Hena Farooqi, James Brydie
The Canadian Arctic is a large and diverse geographic area that encompasses a wide variety of environmental conditions and ecosystems. Over recent decades, marine transportation has increased across the Arctic and, as a result, so has the likelihood of an oil spill. The study of oil spills in the Arctic presents unique challenges compared to temperate marine environments, due to remoteness, cold temperatures and the presence of snow and ice throughout much of the year. This review summarizes and discusses the fate of oil in the Canadian Arctic. A brief introduction to the Canadian Arctic and sources of potential petroleum spills is provided, followed by discussions of the behaviour of oil in ice and freezing temperatures, oil-sediment interactions, and the weathering and natural remediation of oil under Arctic conditions. A summary of perspectives concludes the review, with emphasis on possible areas of future work to address research gaps.
{"title":"A review of oil spill research in Canadian Arctic marine environments","authors":"Nicole E. Heshka, Christine Ridenour , Nayereh Saborimanesh, Qin Xin, Hena Farooqi, James Brydie","doi":"10.1016/j.marpolbul.2024.117275","DOIUrl":"10.1016/j.marpolbul.2024.117275","url":null,"abstract":"<div><div>The Canadian Arctic is a large and diverse geographic area that encompasses a wide variety of environmental conditions and ecosystems. Over recent decades, marine transportation has increased across the Arctic and, as a result, so has the likelihood of an oil spill. The study of oil spills in the Arctic presents unique challenges compared to temperate marine environments, due to remoteness, cold temperatures and the presence of snow and ice throughout much of the year. This review summarizes and discusses the fate of oil in the Canadian Arctic. A brief introduction to the Canadian Arctic and sources of potential petroleum spills is provided, followed by discussions of the behaviour of oil in ice and freezing temperatures, oil-sediment interactions, and the weathering and natural remediation of oil under Arctic conditions. A summary of perspectives concludes the review, with emphasis on possible areas of future work to address research gaps.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117275"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the development of the cruise industry, the associated pollution and social impact issues are becoming more severe. The objective of this study is, therefore, to identify the significant impact factors in the cruise development process and to analyze their effects on the natural environment, economy and society. To this end, the study first identified the dimensions and criteria through interviews with experts and a literature review, grouping the dimensions of impact cost into ‘natural environment’, ‘economic’ and ‘social’ using the best-worst method (BWM) resulting in four impact factors included under each dimension, totalling 12 criteria.
Methodologically, these criteria were sorted by weight using BWM, resulting in the six most influential factors, which were, in order, ‘wastewater, oil pollution and toxic substances’, ‘exhaust gas and noise’, ‘low consumption willingness and failure to meet expectations’, ‘causing urban congestion and traffic jams’, ‘changing the residents’ original lifestyle’ and ‘vectors of infectious disease transmission’. Following this, the causal diagrams between the various criteria were drawn with the causal relationships between the factors analyzed using the decision-making trial and evaluation laboratory (DEMATEL) method.
The results of the study showed that ‘causing urban congestion and traffic jams’ is the key core factor directly affecting the other five. These findings can assist the cruise industry and the local government in formulating effective preventive and improvement measures to minimise the negative environmental and social impacts of cruise development and to ensure the sustainable development of the industry. This study also has important implications for future management and policy formulation in the cruise industry.
{"title":"Environmental, economic, and social impacts of cruise development","authors":"Ming-Tao Chou , Chih-Jung Huang , Chu-Ting Hsu , Cathay Kuo-Tai Kang","doi":"10.1016/j.marpolbul.2024.117279","DOIUrl":"10.1016/j.marpolbul.2024.117279","url":null,"abstract":"<div><div>With the development of the cruise industry, the associated pollution and social impact issues are becoming more severe. The objective of this study is, therefore, to identify the significant impact factors in the cruise development process and to analyze their effects on the natural environment, economy and society. To this end, the study first identified the dimensions and criteria through interviews with experts and a literature review, grouping the dimensions of impact cost into ‘natural environment’, ‘economic’ and ‘social’ using the best-worst method (BWM) resulting in four impact factors included under each dimension, totalling 12 criteria.</div><div>Methodologically, these criteria were sorted by weight using BWM, resulting in the six most influential factors, which were, in order, ‘wastewater, oil pollution and toxic substances’, ‘exhaust gas and noise’, ‘low consumption willingness and failure to meet expectations’, ‘causing urban congestion and traffic jams’, ‘changing the residents’ original lifestyle’ and ‘vectors of infectious disease transmission’. Following this, the causal diagrams between the various criteria were drawn with the causal relationships between the factors analyzed using the decision-making trial and evaluation laboratory (DEMATEL) method.</div><div>The results of the study showed that ‘causing urban congestion and traffic jams’ is the key core factor directly affecting the other five. These findings can assist the cruise industry and the local government in formulating effective preventive and improvement measures to minimise the negative environmental and social impacts of cruise development and to ensure the sustainable development of the industry. This study also has important implications for future management and policy formulation in the cruise industry.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117279"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.marpolbul.2024.117282
Yucheng Wang , Cheng Zhou , Rong Wan , Liuxiong Xu , Shaojian Guo
The drifting speed and trajectory of fish aggregation devices (FADs) influence tuna aggregation behavior. Based on expertise, fishermen modify FAD structures to slow down drifting speed, but few studies quantify material and structure effects on this speed. To address this, 14 different types of FAD models were tested under 5 different current velocities in a flume tank and compared drifting using pairwise Wilcoxon tests. Results indicate that 1) FAD models covered with netting exhibited higher drifting speeds than the others. 2) It is feasible that replacing the netting bundle with the cotton rope of the same diameter for constructing submerged structure effectively slows down the drifting speeds of FADs. 3) Additionally, FAD models with a floating structure aspect ratio close to 1 exhibited slower drifting speeds compared to other designs when the submerged structure is the same.
{"title":"Effects of material and structure types on drifting speed of fish aggregation devices (FADs) in tuna purse seine fishery","authors":"Yucheng Wang , Cheng Zhou , Rong Wan , Liuxiong Xu , Shaojian Guo","doi":"10.1016/j.marpolbul.2024.117282","DOIUrl":"10.1016/j.marpolbul.2024.117282","url":null,"abstract":"<div><div>The drifting speed and trajectory of fish aggregation devices (FADs) influence tuna aggregation behavior. Based on expertise, fishermen modify FAD structures to slow down drifting speed, but few studies quantify material and structure effects on this speed. To address this, 14 different types of FAD models were tested under 5 different current velocities in a flume tank and compared drifting using pairwise Wilcoxon tests. Results indicate that 1) FAD models covered with netting exhibited higher drifting speeds than the others. 2) It is feasible that replacing the netting bundle with the cotton rope of the same diameter for constructing submerged structure effectively slows down the drifting speeds of FADs. 3) Additionally, FAD models with a floating structure aspect ratio close to 1 exhibited slower drifting speeds compared to other designs when the submerged structure is the same.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117282"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.marpolbul.2024.117290
Anirban Akhand , Hongbin Liu , Anupam Ghosh , Abhra Chanda , Rajarshi Dasgupta , Shillpi Mishrra , Peter I. Macreadie
Blue carbon cycling in mangrove ecosystems is proving to be more complex than previously thought. The objective of this study was the application of structural equation modelling (SEM) to capture such complex and varying data types and provide a holistic understanding of mangrove blue carbon cycling using data from the Indian Sundarban as a test case. We found that SEM was effective at integrating multiple data types and characterizing the processes and variables that regulate the nature and magnitude of CO2 fluxes within a mangrove ecosystem, including atmosphere–hydrosphere, atmosphere–pedosphere, and net ecosystem exchange. Overall, this study finds that atmospheric, water, and soil temperatures were the main and common drivers of CO2 effluxes towards the atmosphere from the entire ecosystem, waterbodies, and soils of mangrove ecosystems, respectively. We conclude that SEM is useful for combining data from different sources, gaining an overarching view of the complex biogeochemical cycling of the blue carbon ecosystems.
{"title":"Application of structural equation modelling to study complex “blue carbon” cycling in mangrove ecosystems","authors":"Anirban Akhand , Hongbin Liu , Anupam Ghosh , Abhra Chanda , Rajarshi Dasgupta , Shillpi Mishrra , Peter I. Macreadie","doi":"10.1016/j.marpolbul.2024.117290","DOIUrl":"10.1016/j.marpolbul.2024.117290","url":null,"abstract":"<div><div>Blue carbon cycling in mangrove ecosystems is proving to be more complex than previously thought. The objective of this study was the application of structural equation modelling (SEM) to capture such complex and varying data types and provide a holistic understanding of mangrove blue carbon cycling using data from the Indian Sundarban as a test case. We found that SEM was effective at integrating multiple data types and characterizing the processes and variables that regulate the nature and magnitude of CO<sub>2</sub> fluxes within a mangrove ecosystem, including atmosphere–hydrosphere, atmosphere–pedosphere, and net ecosystem exchange. Overall, this study finds that atmospheric, water, and soil temperatures were the main and common drivers of CO<sub>2</sub> effluxes towards the atmosphere from the entire ecosystem, waterbodies, and soils of mangrove ecosystems, respectively. We conclude that SEM is useful for combining data from different sources, gaining an overarching view of the complex biogeochemical cycling of the blue carbon ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117290"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.marpolbul.2024.117252
Isabela Figueiredo Fraga , Marcelo Vianna , Rachel Ann Hauser-Davis
Sharks, are highly vulnerable to fishing pressures, a key factor in their global population decline. Chemical pollution, however, especially metal and metalloid contamination, poses significant additional risks. Of around 520 shark species, about 170 are threatened, including the Sphyrna genus (hammerheads). This review examines contamination in these sharks and its ecological and human health implications. A scientometric review indicates limited research, mainly on juveniles and only mercury contamination, with scarce data on other metals, life stages, and consumption thresholds. The findings also indicate a certain amount of Colonial Science concerning ecotoxicological Sphyrna spp. assessments. The expected link between ecotoxicological risks and Sphyrna spp. threat status remains inconclusive due to insufficient data. Notably, larger hammerhead species do not always exhibit higher contamination levels, suggesting that local environmental factors may influence contamination more than biological characteristics. More research is required to understand how environmental pressures impact shark vulnerability and inform conservation strategies.
{"title":"A global review on ecotoxicological studies concerning metal and metalloid contamination in Hammerhead Sharks","authors":"Isabela Figueiredo Fraga , Marcelo Vianna , Rachel Ann Hauser-Davis","doi":"10.1016/j.marpolbul.2024.117252","DOIUrl":"10.1016/j.marpolbul.2024.117252","url":null,"abstract":"<div><div>Sharks, are highly vulnerable to fishing pressures, a key factor in their global population decline. Chemical pollution, however, especially metal and metalloid contamination, poses significant additional risks. Of around 520 shark species, about 170 are threatened, including the <em>Sphyrna</em> genus (hammerheads). This review examines contamination in these sharks and its ecological and human health implications. A scientometric review indicates limited research, mainly on juveniles and only mercury contamination, with scarce data on other metals, life stages, and consumption thresholds. The findings also indicate a certain amount of Colonial Science concerning ecotoxicological <em>Sphyrna</em> spp. assessments. The expected link between ecotoxicological risks and <em>Sphyrna</em> spp. threat status remains inconclusive due to insufficient data. Notably, larger hammerhead species do not always exhibit higher contamination levels, suggesting that local environmental factors may influence contamination more than biological characteristics. More research is required to understand how environmental pressures impact shark vulnerability and inform conservation strategies.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"209 ","pages":"Article 117252"},"PeriodicalIF":5.3,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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