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Marine Pollution Bulletin

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https://www.readbyqxmd.com/read/28442202/macrobenthic-communities-in-hong-kong-waters-comparison-between-2001-and-2012-and-potential-link-to-pollution-control
#1
Zhi Wang, Kenneth M Y Leung, Xinzheng Li, Tong Zhang, Jian-Wen Qiu
Macrobenthic communities in 2001 and 2012 were compared across the marine environment of Hong Kong based on sediment grab samples collected from 28 stations. CLUSTER analysis showed in both surveys that the stations could be divided into four groups at 20% faunal similarity. However, there were notable changes in the macrobenthic community structure between 2001 and 2012 in three focal areas of pollution control (i.e., Victoria Harbour, Deep Bay and Tolo Harbour). The potential link between macrobenthos and pollution abatement measures, and the contributions of environmental conditions to the differential responsiveness of macrobenthos were explored...
April 23, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28442200/next-generation-sequencing-and-culture-based-techniques-offer-complementary-insights-into-fungi-and-prokaryotes-in-beach-sands
#2
Daniela Romão, Christopher Staley, Filipa Ferreira, Raquel Rodrigues, Raquel Sabino, Cristina Veríssimo, Ping Wang, Michael Sadowsky, João Brandão
A next-generation sequencing (NGS) approach, in conjunction with culture-based methods, was used to examine fungal and prokaryotic communities for the presence of potential pathogens in beach sands throughout Portugal. Culture-based fungal enumeration revealed low and variable concentrations of the species targeted (yeasts and dermatophytes), which were underrepresented in the community characterized by NGS targeting the ITS1 region. Conversely, NGS indicated that the potentially pathogenic species Purpureocillium liliacinum comprised nearly the entire fungal community...
April 23, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28442201/temporal-variations-in-physiological-responses-of-kandelia-obovata-seedlings-exposed-to-multiple-heavy-metals
#3
Shanshan Cheng, Nora Fung Yee Tam, Ruili Li, Xiaoxue Shen, Zhiyuan Niu, Minwei Chai, Guo Yu Qiu
A study was conducted to quantify temporal variations in physiological responses of Kandelia obovata under multiple heavy metal stress. The results showed that plant growth was not significantly affected by multiple heavy metal stress during the 120-days experiment. At the start, levels of net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) showed effects of "low-promotion, high-inhibition", but Pn and Gs reduced with increasing heavy metal stress at the end. Temporary lipid oxidation was shown by high levels of malondialdehyde (MDA) under high heavy metal stress at the start but was unaffected at the end of the experiment...
April 22, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28442199/tissue-concentrations-of-four-taiwanese-toothed-cetaceans-indicating-the-silver-and-cadmium-pollution-in-the-western-pacific-ocean
#4
Meng-Hsien Chen, Ming-Feng Zhuang, Lien-Siang Chou, Jean-Yi Liu, Chieh-Chih Shih, Chiee-Young Chen
Muscle, lung, kidney and liver tissues of 45 bycatch and stranded cetaceans, including 14 Grampus griseus (Gg), 7 Kogia simus (Ks), 10 Lagenodelphis hosei (Lh), and 14 Stenella attenuata (Sa), were collected in the waters off Taiwan from 1994 to 1995, and from 2001 to 2012. Baseline concentrations (in μgg(-1) dry weight) of the cetaceans were lung (<0.05)=muscle (<0.05)<kidney (0.08±0.04)<liver (0.43±0.28) for Ag, and muscle (0.03±0.03)=lung (0.22±0.19)<liver (3.82±3.50)<kidney (16.22±18...
April 22, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28442198/operational-oil-spill-trajectory-modelling-using-hf-radar-currents-a-northwest-european-continental-shelf-case-study
#5
Ana J Abascal, Jorge Sanchez, Helios Chiri, María I Ferrer, Mar Cárdenas, Alejandro Gallego, Sonia Castanedo, Raúl Medina, Andrés Alonso-Martirena, Barbara Berx, William R Turrell, Sarah L Hughes
This paper presents a novel operational oil spill modelling system based on HF radar currents, implemented in a northwest European shelf sea. The system integrates Open Modal Analysis (OMA), Short Term Prediction algorithms (STPS) and an oil spill model to simulate oil spill trajectories. A set of 18 buoys was used to assess the accuracy of the system for trajectory forecast and to evaluate the benefits of HF radar data compared to the use of currents from a hydrodynamic model (HDM). The results showed that simulated trajectories using OMA currents were more accurate than those obtained using a HDM...
April 22, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28438339/mercury-arsenic-cadmium-and-lead-in-two-commercial-shark-species-sphyrna-lewini-and-caraharinus-porosus-in-trinidad-and-tobago
#6
Azad Mohammed, Terry Mohammed
Sharks are long-lived apex predators which can accumulate toxic metals such as mercury and arsenic. Samples of Sphyrna lewini and Carcharinus porosus were collected from two commercial fish landing sites in Trinidad. Heavy metal concentrations were determined in the muscle, dorsal fin, vertebrae and liver using atomic absorption spectrometric. The provisional tolerable weekly intake (PTWI) and target hazard quotient (THQ) were determined to assess the potential health risks to consumers. Mercury levels ranged between 74-1899μg/kg in S...
April 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28438338/effects-of-polychlorinated-biphenyls-on-metamorphosis-of-a-marine-fish-japanese-flounder-paralichthys-olivaceus-in-relation-to-thyroid-disruption
#7
Yifei Dong, Xiaona Zhang, Hua Tian, Xiang Li, Wei Wang, Shaoguo Ru
This study examined the influence of environmental concentrations of Aroclor 1254 (10, 100, and 1000ng/L) on metamorphosis of Paralichthys olivaceus, and analyzed the mechanisms in relation to thyroid disruption. Results showed that 100 and 1000ng/L Aroclor 1254 delayed metamorphosis and that 1000ng/L Aroclor 1254 caused abnormal morphology. Thyroxine and triiodothyronine levels in the control group were significantly elevated at metamorphic climax, but treatment with 100 and 1000ng/L delayed the increase in thyroid hormones (THs) and retarded metamorphic processes...
April 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28438337/carboxylesterase-activities-in-chondrichthyans-of-the-western-mediterranean-sea
#8
David Nos, Joan Navarro, Claudio Barría, Montserrat Solé
No abstract text is available yet for this article.
April 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434670/real-time-eutrophication-status-evaluation-of-coastal-waters-using-support-vector-machine-with-grid-search-algorithm
#9
Xianyu Kong, Yuyan Sun, Rongguo Su, Xiaoyong Shi
The development of techniques for real-time monitoring of the eutrophication status of coastal waters is of great importance for realizing potential cost savings in coastal monitoring programs and providing timely advice for marine health management. In this study, a GS optimized SVM was proposed to model relationships between 6 easily measured parameters (DO, Chl-a, C1, C2, C3 and C4) and the TRIX index for rapidly assessing marine eutrophication states of coastal waters. The good predictive performance of the developed method was indicated by the R(2) between the measured and predicted values (0...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434669/diurnal-variation-of-co2-ch4-and-n2o-emission-fluxes-continuously-monitored-in-situ-in-three-environmental-habitats-in-a-subtropical-estuarine-wetland
#10
Wen-Bin Yang, Chung-Shin Yuan, Chuan Tong, Pin Yang, Lei Yang, Bang-Qin Huang
Wetlands play a crucial role in modulating atmospheric concentrations of greenhouse gases (GHGs) such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). The key factors controlling GHG emission from subtropical estuarine wetlands were investigated in this study, which continuously monitored the uptake/emission of GHGs (CO2, CH4, and N2O) by/from a subtropical estuarine wetland located in the Minjiang estuary in the coastal region of southeastern China. A self-designed floating chamber was used to collect air samples on-site at three environmental habitats (Phragmites australis marsh, mudflats, and river water)...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434668/parasite-infection-and-immune-and-health-state-in-wild-fish-exposed-to-marine-pollution
#11
María Cruz Sueiro, Estefanía Bagnato, María Gabriela Palacios
Association between parasitism and immunity and health-state was investigated in wild Sebastes oculatus after having determined that pollution exposure is associated with altered immune and health-state parameters. Given the importance of the immune system in antiparasite defense we predicted: (i) parasite infection would be higher in pollution-exposed than in control fish and (ii) fish with lower immune and health-state parameters would show higher parasitism than fish in better condition. Metazoan parasite fauna was compared between pollution-exposed and non-exposed fish and parasitic indices were correlated with integrated measures of immunity and health-state...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434667/sedimentary-heavy-metal-loid-contamination-in-the-veracruz-shelf-gulf-of-mexico-a-baseline-survey-from-a-rapidly-developing-tropical-coast
#12
Celis-Hernandez Omar, Rosales-Hoz Leticia, Cundy Andrew B, Carranza-Edwards Arturo
This study examines sediment texture, geochemistry and sediment accumulation in cores from four sites in the Veracruz shelf area of the Gulf of Mexico, to assess the inputs of heavy metal(loid)s (and their potential biological impacts) in this carbonate-dominated shelf system, and to examine the rate of sedimentation near to the mouths of the La Antigua and Jamapa Rivers. The use of different pollution indices showed enrichment with Pb in all cores studied, although based on sediment quality guidelines As was the only element that has potential to occasionally cause damage to the benthic organisms present in the area...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434666/heavy-metal-distribution-and-contamination-status-in-the-sedimentary-environment-of-cochin-estuary
#13
P M Salas, C H Sujatha, C S Ratheesh Kumar, Eldhose Cheriyan
Heavy metals (Fe, Mn, Cr, Zn, Ni, Pb, Cu, Co and Cd) in the surface sediments of Cochin estuary, Southwest coast of India were analyzed to understand the spatio-temporal variation and contamination status via six sampling campaigns. Pollution indices like enrichment factor, geoaccumulation index and pollution load index inferred that the sediments of the northern arm of the estuary exhibited severe trace metal accumulation. Numerical sediment quality guidelines were applied to assess adverse biological effects of the trace metals, suggesting that occasional biological effect may occur due to Cr, Cu, Ni and Pb...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434665/eutrophication-harmful-algae-and-biodiversity-challenging-paradigms-in-a-world-of-complex-nutrient-changes
#14
Patricia M Glibert
Eutrophication is a complex process and often associated with not only a change in overall algal biomass but also with a change in biodiversity. Common metrics of eutrophication (e.g., chlorophyll a), total nitrogen (TN) and phosphorus (TP) are not adequate for understanding biodiversity changes, especially those associated with harmful algal bloom (HAB) proliferations. Harmful algae can increase disproportionately with eutrophication, depending on which nutrients change and in what proportion. This paper challenges several classic paradigms in our understanding of eutrophication and associated biodiversity changes...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434664/marine-debris-in-beaches-of-the-southwestern-atlantic-an-assessment-of-their-abundance-and-mass-at-different-spatial-scales-in-northern-coastal-argentina
#15
Maria Eugenia Becherucci, Alan Federico Rosenthal, Juan Pablo Seco Pon
Argentina is currently undergoing an intensive development of coastal-oriented tourism due to the temperate climate and coastal sceneries of the Southwestern Atlantic and particularly its wide ocean-open sandy beaches, which may turn into an important contributor of marine debris to the beaches. This study was designed to assess at four spatial scales (i) the variation of the abundance and mass of marine debris and (ii) the composition and sources of these items in sandy-tourist beaches of coastal zones of the province of Buenos Aires, in northern Argentina...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434663/evaluation-of-toxic-elements-as-cd-cr-cu-ni-pb-and-zn-in-the-surficial-sediments-of-the-red-sea-saudi-arabia
#16
Manikandan P Karuppasamy, Mohammad A Qurban, Periyadan K Krishnakumar, Shemsi Ahsan Mushir, Nabil Abuzaid
No abstract text is available yet for this article.
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28433395/distribution-enrichment-and-source-of-heavy-metals-in-rizhao-offshore-area-southeast-shandong-province
#17
Hongying Song, Jinqing Liu, Ping Yin, Yong Zhang
50 surface sediments were collected from Rizhao offshore area to determine heavy metals (Cu, Pb, Zn, Cr, Cd, As, Hg) pollution. High heavy metal values were located near the two ports in the north and south study areas, which was consistent with the distribution of fine-grained sediments. According to threshold effect level (TEL) and probable effect level (PEL), Cu and As had occasionally adverse biological effects on the aquatic ecosystems. The enrichment factor (EF) values showed that most of the study area was moderate or moderately severe enrichment for As, and minor enrichment for Pb, but Hg was only moderately enriched in the river estuaries...
April 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28433394/a-modelling-comparison-between-received-sound-levels-produced-by-a-marine-vibroseis-array-and-those-from-an-airgun-array-for-some-typical-seismic-survey-scenarios
#18
Alec J Duncan, Linda S Weilgart, Russell Leaper, Michael Jasny, Sharon Livermore
Marine Vibroseis (MV) may provide a marine seismic sound source that has less environmental impact than conventional airguns. Modelled sound levels from a realistic MV array and airgun array with similar downward energy at frequencies <100Hz were compared under three scenarios: shallow, deep, and slope. Changing the layout of the MV array's higher frequency sources reduced sound exposure levels (SELs) by 4dB. At 100m range this MV was 20dB lower in peak-to-peak sound pressure level vs. the airgun array, decreasing to 12dB lower at 5km, the maximum modelled range for peak levels...
April 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28433393/potential-mobility-of-inorganic-nutrients-and-its-controls-at-the-sediment-water-interface-in-the-main-path-of-kuroshio-current-off-eastern-taiwan
#19
Fengxia Zhou, Xuelu Gao, Yong Zhang, Huamao Yuan, Jinming Song, Kai Liu, Bo Yang, Wen Zhuang
Surface sediments were collected from the main path of Kuroshio Current (KC) off eastern Taiwan (ETW), and laboratory incubation was conducted for the study of the nutrient exchange at the sediment-water interface. Exchange fluxes of NO3(-)-N, NO2(-)-N, NH4(+)-N, PO4(3-)-P and SiO3(2-)-Si under simulated site condition were -0.0866, 0.00146, 0.0634, -0.00812 and -0.181mmolm(-2)d(-1), respectively. This indicated that sediments in the studied area might act as a source of NO2(-)-N and NH4(+)-N and a sink of NO3(-)-N, PO4(3-)-P and SiO3(2-)-Si...
April 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28431744/incidence-of-marine-debris-in-seabirds-feeding-at-different-water-depths
#20
D C Tavares, J F de Moura, A Merico, S Siciliano
Marine debris such as plastic fragments and fishing gears are accumulating in the ocean at alarming rates. This study assesses the incidence of debris in the gastrointestinal tracts of seabirds feeding at different depths and found stranded along the Brazilian coast in the period 2010-2013. More than half (55%) of the species analysed, corresponding to 16% of the total number of individuals, presented plastic particles in their gastrointestinal tracts. The incidence of debris was higher in birds feeding predominantly at intermediate (3-6m) and deep (20-100m) waters than those feeding at surface (<2m)...
April 18, 2017: Marine Pollution Bulletin
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