Pub Date : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117418
Sangeetha M. Nair, Pranab Gogoi, Dibakar Bhakta, R.K. Manna, Chayna Jana, Abhijita Sengupta, S.K. Manna, S. Samanta, B.K. Das
Spatial and temporal variation in phytoplankton assemblage and their species responses with varying salinity regimes were investigated in the Hooghly Matlah estuary, India during two annual period. The exhaustive survey in the ten sampling stations recorded 132 species of phytoplankton belonging to 95 genera. The study revealed 12 taxonomic algal groups with the dominance of class Bacillariophyceae (43 species). Indicator species analysis revealed the dominance of Aulacoseira granulata, Scenedesmus quadricauda, Eudorina sp. and Protococcus sp. in the tidal freshwater zone while a higher proportion of Pleurosigma sp., Synedra sp. and Coscinodiscus sp. were observed in the intermediate zone. The middle and lower estuary were dominant with Cyclotella sp. and Closterium sp. in upper Sundarbans and Entomoneis sp. and Chaetoceros sp. in lower Sundarbans. Species response curve using GAM modelling was performed to identify the taxa that had their population maximum in various saline zones of the estuary.
{"title":"Salinity variations drive the phytoplankton dynamics in the Gangetic estuary: insights from the modelling approach for species responses and pollution indicators along the longitudinal estuarine gradient","authors":"Sangeetha M. Nair, Pranab Gogoi, Dibakar Bhakta, R.K. Manna, Chayna Jana, Abhijita Sengupta, S.K. Manna, S. Samanta, B.K. Das","doi":"10.1016/j.marpolbul.2024.117418","DOIUrl":"10.1016/j.marpolbul.2024.117418","url":null,"abstract":"<div><div>Spatial and temporal variation in phytoplankton assemblage and their species responses with varying salinity regimes were investigated in the Hooghly Matlah estuary, India during two annual period. The exhaustive survey in the ten sampling stations recorded 132 species of phytoplankton belonging to 95 genera. The study revealed 12 taxonomic algal groups with the dominance of class Bacillariophyceae (43 species). Indicator species analysis revealed the dominance of <em>Aulacoseira granulata</em>, <em>Scenedesmus quadricauda, Eudorina</em> sp. and <em>Protococcus</em> sp. in the tidal freshwater zone while a higher proportion of <em>Pleurosigma</em> sp.<em>, Synedra</em> sp. and <em>Coscinodiscus</em> sp. were observed in the intermediate zone. The middle and lower estuary were dominant with <em>Cyclotella</em> sp. and <em>Closterium</em> sp. in upper Sundarbans and <em>Entomoneis</em> sp. and <em>Chaetoceros</em> sp. in lower Sundarbans. Species response curve using GAM modelling was performed to identify the taxa that had their population maximum in various saline zones of the estuary.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117418"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824416","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}
Microcystins are generated by diverse cyanobacteria in shrimp ponds marked by high nutrient levels. The study examined microcystin-leucine arginine (MC-LR) in the pond water, gills, hepatopancreas, and muscle of shrimp (Litopenaeus vannamei) from shrimp ponds on the northern coast of East Java and its effects on their histological structures. In shrimp ponds dominated by cyanobacteria particularly Microcystis and Oscillatoria, MC-LR levels were high. In pond water, Microcystis and Oscillatoria levels increased along with NO2−, NH4+, clarity, and salinity. Shrimp tissues, such as the gills and hepatopancreas, experienced elevated MC-LR concentrations as a consequence of the MC-LR toxin increase in pond water. Shrimp inhabitants of ponds with elevated MC-LR concentrations exhibited significant changes in histological architecture, like hyperplasia in gill tissue and extensive vacuolation in hepatopancreas tissue. L. vannamei muscle samples show MC-LR amounts below the WHO's recommended daily intake of 0.04 μg/kg body weight/day, indicating no health risks to humans.
{"title":"Evidence of microcystin bioaccumulation and its effects on structural alterations in various shrimp (Litopenaeus vannamei Boone, 1931) tissues from shrimp aquaculture in the northern coastal region of East Java, Indonesia","authors":"Agoes Soegianto , Wildanun Mukholladun , Trisnadi Widyaleksono Catur Putranto , Ary Marchellina , Latifah Binti Abd Manaf , Yulia Irnidayanti , Mark G.J. Hartl , Carolyn Melissa Payus","doi":"10.1016/j.marpolbul.2024.117467","DOIUrl":"10.1016/j.marpolbul.2024.117467","url":null,"abstract":"<div><div>Microcystins are generated by diverse cyanobacteria in shrimp ponds marked by high nutrient levels. The study examined microcystin-leucine arginine (MC-LR) in the pond water, gills, hepatopancreas, and muscle of shrimp (<em>Litopenaeus vannamei</em>) from shrimp ponds on the northern coast of East Java and its effects on their histological structures. In shrimp ponds dominated by cyanobacteria particularly <em>Microcystis</em> and <em>Oscillatoria</em>, MC-LR levels were high. In pond water, <em>Microcystis</em> and <em>Oscillatoria</em> levels increased along with NO<sub>2</sub><sup>−</sup>, NH<sub>4</sub><sup>+</sup>, clarity, and salinity. Shrimp tissues, such as the gills and hepatopancreas, experienced elevated MC-LR concentrations as a consequence of the MC-LR toxin increase in pond water. Shrimp inhabitants of ponds with elevated MC-LR concentrations exhibited significant changes in histological architecture, like hyperplasia in gill tissue and extensive vacuolation in hepatopancreas tissue. <em>L. vannamei</em> muscle samples show MC-LR amounts below the WHO's recommended daily intake of 0.04 μg/kg body weight/day, indicating no health risks to humans.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117467"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864759","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117491
Neri Bonciani , Bodil W. Lauridsen , Rasmus Jakobsen , Karen L. Feilberg
The offshore oilfields in the North Sea area are increasingly employed for projects beyond oil production, like carbon capture and storage (CCS). Still, the fossil fuel production from mature fields is significant. It has raised environmental concerns associated with discharging produced waters (PW) and drilling mud into the sea. These discharges, which may be highly saline and contain production chemicals, vary significantly in metals and particulate content. Due to density and release depth, the plume is assumed to sink towards the seafloor. Also, a single oilfield can input up to 7.5 tons of Ba, 675 kg of Fe, and 619 kg of P into the water column through PW. Therefore, this study investigates the impact of these discharges on seafloor sediments around two Danish oilfields, assesses the mobility of metals within these sediments, and evaluates the environmental status. PW samples were collected at the discharge outlets from the platforms. Sediment cores were taken near the two oil platforms and from control sites. Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and an optimized BCR sequential extraction, we analyzed the composition and distribution of 24 elements in sediment samples. The results revealed significant differences in total extracted concentrations between sediments near the platforms and those from distant locations and stratigraphically older samples, with relevant levels of Br, Ba, and Sn near the platforms (averaged 14, 27, and 0.1 ppb, respectively). Sediment quality indices showed considerable enrichment and geo-accumulation of toxic metals, particularly at one of the platform sites. However, cumulative indices did not display significant pollution anomalies. Therefore, our findings suggest that oil extraction activities may increase the availability of toxic metals in nearby sediments, potentially impacting marine ecosystems.
{"title":"Impact of offshore energy activities on trace elements content and mobility in marine sediments","authors":"Neri Bonciani , Bodil W. Lauridsen , Rasmus Jakobsen , Karen L. Feilberg","doi":"10.1016/j.marpolbul.2024.117491","DOIUrl":"10.1016/j.marpolbul.2024.117491","url":null,"abstract":"<div><div>The offshore oilfields in the North Sea area are increasingly employed for projects beyond oil production, like carbon capture and storage (CCS). Still, the fossil fuel production from mature fields is significant. It has raised environmental concerns associated with discharging produced waters (PW) and drilling mud into the sea. These discharges, which may be highly saline and contain production chemicals, vary significantly in metals and particulate content. Due to density and release depth, the plume is assumed to sink towards the seafloor. Also, a single oilfield can input up to 7.5 tons of Ba, 675 kg of Fe, and 619 kg of P into the water column through PW. Therefore, this study investigates the impact of these discharges on seafloor sediments around two Danish oilfields, assesses the mobility of metals within these sediments, and evaluates the environmental status. PW samples were collected at the discharge outlets from the platforms. Sediment cores were taken near the two oil platforms and from control sites. Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and an optimized BCR sequential extraction, we analyzed the composition and distribution of 24 elements in sediment samples. The results revealed significant differences in total extracted concentrations between sediments near the platforms and those from distant locations and stratigraphically older samples, with relevant levels of Br, Ba, and Sn near the platforms (averaged 14, 27, and 0.1 ppb, respectively). Sediment quality indices showed considerable enrichment and geo-accumulation of toxic metals, particularly at one of the platform sites. However, cumulative indices did not display significant pollution anomalies. Therefore, our findings suggest that oil extraction activities may increase the availability of toxic metals in nearby sediments, potentially impacting marine ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117491"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874134","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 : 2025-02-01Epub Date: 2024-12-23DOI: 10.1016/j.marpolbul.2024.117479
Seohyun Cho, Young Jin Lee, Min Seong Kang, Sang Yeob Lee, Young A Lee, Seong Jin Kim, Seok Chung, Myoung-Woon Moon
Oil spill accidents have series environmental and economic impacts, increasing the demand for efficient technologies to recover oil from contaminated waters. In this study, a hierarchically structured ratchet surface with superhydrophilicity was presented as a novel oil skimming mechanism for the recovery of high-viscosity oil, particularly low-sulfur fuel oil (LSFO), which has recently been used as marine fuel in open water environments. The interaction between the superhydrophilic ratchet and oil provides favorable conditions for oil retention at the water surface. The hierarchical structure minimizes contact between oil and the skimmer surface, allowing separation without a scraper, even at higher speeds. In addition, the ratchet skimmer generates a water surface flow near the skimmer, driving oil to the drum and improving skimming performance. The skimmer achieved a recovery efficiency of almost 100 % under various experimental conditions with an LSFO viscosity of up to 12,000 cSt.
{"title":"Hierarchically-structured ratchet skimmer with superhydrophilicity for continuous recovery of high-viscosity oil.","authors":"Seohyun Cho, Young Jin Lee, Min Seong Kang, Sang Yeob Lee, Young A Lee, Seong Jin Kim, Seok Chung, Myoung-Woon Moon","doi":"10.1016/j.marpolbul.2024.117479","DOIUrl":"10.1016/j.marpolbul.2024.117479","url":null,"abstract":"<p><p>Oil spill accidents have series environmental and economic impacts, increasing the demand for efficient technologies to recover oil from contaminated waters. In this study, a hierarchically structured ratchet surface with superhydrophilicity was presented as a novel oil skimming mechanism for the recovery of high-viscosity oil, particularly low-sulfur fuel oil (LSFO), which has recently been used as marine fuel in open water environments. The interaction between the superhydrophilic ratchet and oil provides favorable conditions for oil retention at the water surface. The hierarchical structure minimizes contact between oil and the skimmer surface, allowing separation without a scraper, even at higher speeds. In addition, the ratchet skimmer generates a water surface flow near the skimmer, driving oil to the drum and improving skimming performance. The skimmer achieved a recovery efficiency of almost 100 % under various experimental conditions with an LSFO viscosity of up to 12,000 cSt.</p>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"117479"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142885640","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117360
Megan M. Trusler , Sarah Cook , Barry H. Lomax , Christopher H. Vane
Microplastics in sediment cores from urban tidal tributaries, Barking and Bow Creek-London and salt marshes Swanscombe, Kent, and Rainham, Essex, Thames estuary (UK), were quantified by density separation and ATR-FTIR spectroscopy. All eight tributary cores were dominated by low-density microplastics, polypropylene, polyethylene, and polystyrene with the greatest abundance (mean 360.0 ± 12.0 particles 100 g−1 dwt (0–10 cm depth) observed furthest from the confluence with the Thames due to storm tank combined-sewer-overflow input. Salt marsh core microplastics were highest at Swanscombe (mean 267.1 ± 10.2 particles 100 g−1 dwt at 0–10 cm depth) in the high-marsh vegetation zone. Marsh sediment radionuclide dating (Pb210, Cs137) suggested a presence of microplastics in the sediment since at least the late 1950s, with increasing abundance towards surface sediments. Tidal tributaries and salt marshes of the Thames act as natural filters, with salt marshes accumulating microplastics over time and tributaries acting as both stores and sources depending on individual site conditions and hydrodynamic variability.
{"title":"Microplastic pollution in salt marsh and urban tributary sediment cores of the River Thames estuary, UK: Spatial and temporal accumulation trends","authors":"Megan M. Trusler , Sarah Cook , Barry H. Lomax , Christopher H. Vane","doi":"10.1016/j.marpolbul.2024.117360","DOIUrl":"10.1016/j.marpolbul.2024.117360","url":null,"abstract":"<div><div>Microplastics in sediment cores from urban tidal tributaries, Barking and Bow Creek-London and salt marshes Swanscombe, Kent, and Rainham, Essex, Thames estuary (UK), were quantified by density separation and ATR-FTIR spectroscopy. All eight tributary cores were dominated by low-density microplastics, polypropylene, polyethylene, and polystyrene with the greatest abundance (mean 360.0 ± 12.0 particles 100 g<sup>−1</sup> dwt (0–10 cm depth) observed furthest from the confluence with the Thames due to storm tank combined-sewer-overflow input. Salt marsh core microplastics were highest at Swanscombe (mean 267.1 ± 10.2 particles 100 g<sup>−1</sup> dwt at 0–10 cm depth) in the high-marsh vegetation zone. Marsh sediment radionuclide dating (Pb<sup>210</sup>, Cs<sup>137</sup>) suggested a presence of microplastics in the sediment since at least the late 1950s, with increasing abundance towards surface sediments. Tidal tributaries and salt marshes of the Thames act as natural filters, with salt marshes accumulating microplastics over time and tributaries acting as both stores and sources depending on individual site conditions and hydrodynamic variability.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117360"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142780625","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117425
Claire Guillebon , Prescilla Perrichon , Howard I. Browman , Alessandro Cresci , Lise Doksæter Sivle , Anne Berit Skiftesvik , Guosong Zhang , Caroline M.F. Durif
Controlled source electromagnetics (CSEM) uses electromagnetic fields (EMF) to detect oil reservoirs. Atlantic haddock, Melanogrammus aeglefinus, is a commercially important demersal fish species that can potentially be impacted by such surveys due to potential overlap with egg distribution. In this study, haddock eggs were exposed to EMF, replicating CSEM survey conditions in a laboratory. Three different EMF intensities were used to replicate different distances between the EMF source and the organism. Exposures lasted for 15 min. A worst-case scenario, i.e. 1 h exposure at the highest EMF level was also carried out. None of the treatments caused malformations, mortality or affected hatching of eggs. However, EMF exposure induced tachycardia in newly hatched larvae and reduced the size of their yolk sac reserve. The effect was significant at the lowest EMF intensity (corresponding to 1000 m between the EMF source and the exposed subject) and increased with exposure time and intensity.
{"title":"Effects of anthropogenic electromagnetic fields used for subsurface oil and gas exploration (controlled-source electromagnetics, CSEM) on the early development of Atlantic haddock (Melanogrammus aeglefinus)","authors":"Claire Guillebon , Prescilla Perrichon , Howard I. Browman , Alessandro Cresci , Lise Doksæter Sivle , Anne Berit Skiftesvik , Guosong Zhang , Caroline M.F. Durif","doi":"10.1016/j.marpolbul.2024.117425","DOIUrl":"10.1016/j.marpolbul.2024.117425","url":null,"abstract":"<div><div>Controlled source electromagnetics (CSEM) uses electromagnetic fields (EMF) to detect oil reservoirs. Atlantic haddock, <em>Melanogrammus aeglefinus</em>, is a commercially important demersal fish species that can potentially be impacted by such surveys due to potential overlap with egg distribution. In this study, haddock eggs were exposed to EMF, replicating CSEM survey conditions in a laboratory. Three different EMF intensities were used to replicate different distances between the EMF source and the organism. Exposures lasted for 15 min. A worst-case scenario, i.e. 1 h exposure at the highest EMF level was also carried out. None of the treatments caused malformations, mortality or affected hatching of eggs. However, EMF exposure induced tachycardia in newly hatched larvae and reduced the size of their yolk sac reserve. The effect was significant at the lowest EMF intensity (corresponding to 1000 m between the EMF source and the exposed subject) and increased with exposure time and intensity.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117425"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822342","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117412
Aina Arifah Khalid , Nur Izzati Abd Razak , Sabiqah Tuan Anuar , Yusof Shuaib Ibrahim , Mohd Uzair Rusli , Maisarah Jaafar
This study presents the first evidence of microplastics in natural sea turtle nests at Chagar Hutang Turtle Sanctuary (CHTS) on Redang Island, a crucial habitat for green turtles. Microplastics were detected in all studied turtle nests (0–70 cm depth), with a total abundance of 12,270 microplastic items per kg dry weight of sand. Fibers (80.7 %) were the most prevalent shape, primarily black (37.9 %), with a high proportion of small-sized particles (<300–1000 μm), indicating prolonged accumulation and environmental degradation. These microplastics, primarily polyethylene terephthalate (PET) and polyethylene (PE), are likely from fishing nets, food packaging, and textiles. Despite the sanctuary's remote location, it is heavily impacted by microplastics carried by tides and wind, raising concerns about their potential effects on turtle egg incubation. The findings offer critical insights into the impact of microplastics on turtle habitats and underscore the urgent need for conservation efforts to protect green sea turtles in Malaysia.
{"title":"Microplastics contamination in natural sea turtle nests at Redang Island, Malaysia","authors":"Aina Arifah Khalid , Nur Izzati Abd Razak , Sabiqah Tuan Anuar , Yusof Shuaib Ibrahim , Mohd Uzair Rusli , Maisarah Jaafar","doi":"10.1016/j.marpolbul.2024.117412","DOIUrl":"10.1016/j.marpolbul.2024.117412","url":null,"abstract":"<div><div>This study presents the first evidence of microplastics in natural sea turtle nests at Chagar Hutang Turtle Sanctuary (CHTS) on Redang Island, a crucial habitat for green turtles. Microplastics were detected in all studied turtle nests (0–70 cm depth), with a total abundance of 12,270 microplastic items per kg dry weight of sand. Fibers (80.7 %) were the most prevalent shape, primarily black (37.9 %), with a high proportion of small-sized particles (<300–1000 μm), indicating prolonged accumulation and environmental degradation. These microplastics, primarily polyethylene terephthalate (PET) and polyethylene (PE), are likely from fishing nets, food packaging, and textiles. Despite the sanctuary's remote location, it is heavily impacted by microplastics carried by tides and wind, raising concerns about their potential effects on turtle egg incubation. The findings offer critical insights into the impact of microplastics on turtle habitats and underscore the urgent need for conservation efforts to protect green sea turtles in Malaysia.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117412"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824394","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117419
Yuanmei Wan , Yang Lu , Chunzhu Wei , Weilin Liao , Liang Zhou
Marine heatwave (MHW) can increase heat exchange between the land and the ocean, which may further develop into a consecutive marine and terrestrial heatwave (CMTHW). Despite their significance, the feedback mechanisms underlying these compound events remain inadequately understood. This study provides a comprehensive analysis of the interactions between terrestrial and marine heatwaves across China's coastal regions, leveraging multiple temperature datasets. Our findings reveal a marked increase in both the frequency and spatial extent of CMTHWs over the past four decades. Notably, longer lasting and more intense MHWs are more likely to trigger subsequent terrestrial heatwaves (THWs), indicating that CMTHWs are associated with more severe and prolonged MHWs compared to standalone MHWs. Atmospheric processes cause additional land surface warming relative to the ocean. Specifically, during CMTHWs, land surface latent heat flux anomalies are significantly larger than those over the ocean, highlighting the critical role of atmospheric feedback. These findings underscore the need for further investigation into the mechanisms linking marine and terrestrial heatwaves and the broader implications for coastal climate dynamics and ecosystem resilience.
{"title":"More frequent, longer, and hotter consecutive marine and terrestrial heatwaves in China's coastal regions","authors":"Yuanmei Wan , Yang Lu , Chunzhu Wei , Weilin Liao , Liang Zhou","doi":"10.1016/j.marpolbul.2024.117419","DOIUrl":"10.1016/j.marpolbul.2024.117419","url":null,"abstract":"<div><div>Marine heatwave (MHW) can increase heat exchange between the land and the ocean, which may further develop into a consecutive marine and terrestrial heatwave (CMTHW). Despite their significance, the feedback mechanisms underlying these compound events remain inadequately understood. This study provides a comprehensive analysis of the interactions between terrestrial and marine heatwaves across China's coastal regions, leveraging multiple temperature datasets. Our findings reveal a marked increase in both the frequency and spatial extent of CMTHWs over the past four decades. Notably, longer lasting and more intense MHWs are more likely to trigger subsequent terrestrial heatwaves (THWs), indicating that CMTHWs are associated with more severe and prolonged MHWs compared to standalone MHWs. Atmospheric processes cause additional land surface warming relative to the ocean. Specifically, during CMTHWs, land surface latent heat flux anomalies are significantly larger than those over the ocean, highlighting the critical role of atmospheric feedback. These findings underscore the need for further investigation into the mechanisms linking marine and terrestrial heatwaves and the broader implications for coastal climate dynamics and ecosystem resilience.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117419"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824397","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117468
Ahmed Inal, Samir Bachouche, Samir Rouidi, Amine Bouhadja
A total of 254 fishing hauls were sampled with a GOC73 bottom trawl during the four demersal resource assessment research cruises, respectively, in 2016, 2019, 2021 and 2022, carried out on board the BELKACEM GRINE research vessel (R/V). We performed the hauls between 22 and 660 m of depth, after which we counted and weighed each piece of marine litter separately to the nearest 0.5 g.
The results show that marine litter densities varied between 1350 and 5813 item/km2. Thus, plastic is the most abundant litter, it represents a mean rate of 76 % of the whole marine litter. Among this plastic, 3.8 % was identified as fishing gears or fishing related objects. Therefore, the average loss in catch was estimated at 7 % over the study period. However, the highest density of marine litter was found in the region of Bejaia located in the Center part of the Algerian coast. Moreover, the bathymetric and geographical variability had a significant impact on both density and weight of marine litter. A marine litter monitoring program is necessary for offering a more effective solutions.
{"title":"Distribution and composition of seafloor macrolitter in the trawlable fishing areas along the Algerian coast (Western Mediterranean)","authors":"Ahmed Inal, Samir Bachouche, Samir Rouidi, Amine Bouhadja","doi":"10.1016/j.marpolbul.2024.117468","DOIUrl":"10.1016/j.marpolbul.2024.117468","url":null,"abstract":"<div><div>A total of 254 fishing hauls were sampled with a GOC73 bottom trawl during the four demersal resource assessment research cruises, respectively, in 2016, 2019, 2021 and 2022, carried out on board the BELKACEM GRINE research vessel (R/V). We performed the hauls between 22 and 660 m of depth, after which we counted and weighed each piece of marine litter separately to the nearest 0.5 g.</div><div>The results show that marine litter densities varied between 1350 and 5813 item/km<sup>2</sup>. Thus, plastic is the most abundant litter, it represents a mean rate of 76 % of the whole marine litter. Among this plastic, 3.8 % was identified as fishing gears or fishing related objects. Therefore, the average loss in catch was estimated at 7 % over the study period. However, the highest density of marine litter was found in the region of Bejaia located in the Center part of the Algerian coast. Moreover, the bathymetric and geographical variability had a significant impact on both density and weight of marine litter. A marine litter monitoring program is necessary for offering a more effective solutions.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117468"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864674","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 : 2025-02-01DOI: 10.1016/j.marpolbul.2024.117458
Luana Portz , Ana Murgas-Vargas , Priscila Teixeira Campos , Diego Andres Villate-Daza , Rogerio Portantiolo Manzolli
Islands are particularly vulnerable to storms and hurricanes, which can cause severe environmental, economic, and social impacts, including the accumulation of waste in marine ecosystems. In November 2020, Hurricane Iota struck the islands of Providencia and Santa Catalina in the Seaflower Biosphere Reserve, Colombia. This study assesses the distribution, composition, and sources of marine litter after the hurricane, focusing on variations observed across coastal ecosystems such as beaches, mangroves, and coral reefs. A comparative analysis of data from 2019 and 2021 reveals significant differences in how the island's diverse ecosystems interact with marine litter, underscoring the impact of extreme events on these environments. While mangroves and back-beach vegetation act as retention zones, particularly for plastic waste, these ecosystems showed a marked reduction in litter density in 2021, likely due to direct removal efforts during recovery and hurricane-driven oceanographic processes that may have redistributed lighter litter. In contrast, sandy beaches experienced an increase in litter following the hurricane, highlighting their greater vulnerability to litter deposition transported by waves and wind during extreme weather events. These findings emphasize the complexity of managing marine litter after natural disasters and underscore the need for enhanced waste management strategies in vulnerable island ecosystems.
{"title":"How natural disasters affect the distribution of marine litter in protected island ecosystems (Seaflower Biosphere Reserve — Colombia)","authors":"Luana Portz , Ana Murgas-Vargas , Priscila Teixeira Campos , Diego Andres Villate-Daza , Rogerio Portantiolo Manzolli","doi":"10.1016/j.marpolbul.2024.117458","DOIUrl":"10.1016/j.marpolbul.2024.117458","url":null,"abstract":"<div><div>Islands are particularly vulnerable to storms and hurricanes, which can cause severe environmental, economic, and social impacts, including the accumulation of waste in marine ecosystems. In November 2020, Hurricane Iota struck the islands of Providencia and Santa Catalina in the Seaflower Biosphere Reserve, Colombia. This study assesses the distribution, composition, and sources of marine litter after the hurricane, focusing on variations observed across coastal ecosystems such as beaches, mangroves, and coral reefs. A comparative analysis of data from 2019 and 2021 reveals significant differences in how the island's diverse ecosystems interact with marine litter, underscoring the impact of extreme events on these environments. While mangroves and back-beach vegetation act as retention zones, particularly for plastic waste, these ecosystems showed a marked reduction in litter density in 2021, likely due to direct removal efforts during recovery and hurricane-driven oceanographic processes that may have redistributed lighter litter. In contrast, sandy beaches experienced an increase in litter following the hurricane, highlighting their greater vulnerability to litter deposition transported by waves and wind during extreme weather events. These findings emphasize the complexity of managing marine litter after natural disasters and underscore the need for enhanced waste management strategies in vulnerable island ecosystems.</div></div>","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"211 ","pages":"Article 117458"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864763","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号