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Insights into the pelagic ciliate community in the Bering Sea: Carbon stock, driving factors and indicator function for climate change J. Mar. Syst. (IF 2.8) Pub Date : 2024-03-11 Chaofeng Wang, Zhimeng Xu, Xiaoyu Wang, Yan He, Zhiqiang Xu, Guangfu Luo, Haibo Li, Xinhua Chen, Wuchang Zhang
Microzooplankton carbon stock and its biotic-abiotic interactions are important linkage in marine carbon biogeochemistry, which remain poorly documented in the Bering Sea. In the summer of 2019, we investigated the community structure of pelagic ciliates from the surface to bottom (or up to 200 m) in the Bering Sea. High abundance and biomass of ciliate occurred mainly in waters shallower than 50 m
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Dissolved carbohydrates and its influence on bacterioplankton diversity in the euphotic zone of Equatorial Indian Ocean during southwest monsoon J. Mar. Syst. (IF 2.8) Pub Date : 2024-03-08 Bhaskar V. Parli, Alok K. Sinha, Jane T. Bhaskar
The Equatorial Indian Ocean (EIO) is oligotrophic in nature, low in productivity and characterised by relatively high bacterial biomass and heterotrophic productivity. The microbial biomass is fuelled by dissolved organic carbon (DOC) whose lability depends upon its chemistry. During an expedition in the EIO, samples for dissolved carbohydrates (DCHO), dissolved monosaccharide (MCHO), dissolved polysaccharide
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Marine community trophic structure of Malpelo Island, Colombia from stable isotopes approach J. Mar. Syst. (IF 2.8) Pub Date : 2024-02-18 Colombo Estupiñán-Montaño, Carlos J. Polo-Silva, Fernando R. Elorriaga-Verplancken, Alberto Sánchez-González, Manuel J. Zetina-Rejón, Antonio Delgado-Huertas, Jaiver Rojas-Cundumí, Felipe Galván-Magaña
Expanding knowledge of the trophodynamic of ecosystems improves the understanding of energy flow and interactions formed in food webs; therefore, structural knowledge of food webs helps to understand the ecosystem dynamics. This study describes the marine trophic structure of the largest marine protected area (MPA) of the Colombian Pacific in Malpelo Island, using δC and δN. A total of 293 (38 groups/families)
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The influence of the cape canyon on the food web structure of the southern Benguela upwelling system J. Mar. Syst. (IF 2.8) Pub Date : 2024-02-07 Eleonora Puccinelli, Zoleka Filander, Tarron Lamont
Submarine canyons are heterogeneous environments known to support a variety of benthic organisms and they are considered biodiversity hotspots. The peculiar hydrographic conditions that characterize these systems, including the high level of organic matter accumulation and transport, can lead to intense resuspension that can influence the food available to the benthos. The Cape Canyon is the largest
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Influences of tides on shelf circulation in the northeastern South China Sea during summer J. Mar. Syst. (IF 2.8) Pub Date : 2024-01-24 Bingxu Geng, Yeqiang Shu, Jiatang Hu, Shiyu Li, Na Liu, Peng Xiu, Dongxiao Wang
Tides have significant effects on material and energy transports over the continental shelf. A mooring system located in the shelf region of the northeastern South China Sea observed strong and weak mean currents during the spring and neap tides in summer, respectively. The mechanism leading to this difference is investigated by using a three-dimensional circulation model. We find that the impact of
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Vertical variations of bacterial growth, mortality loss to nanoflagellates, and viruses in the subtropical northwestern Pacific Ocean J. Mar. Syst. (IF 2.8) Pub Date : 2024-01-23 Feng-Hsun Chang, Gwo-Ching Gong, Chih-hao Hsieh, Patrichka Wei-Yi Chen, Vladimir Mukhanov, An-Yi Tsai
Nanoflagellate grazing and viral lysis are the two main causes of mortality losses of marine bacterioplankton. Deciphering the mortality losses across the water column helps us understand their ecological and biogeochemical consequences. In this study, we implemented the two-point modified dilution method consisting of treatment of undiluted and 25% nanoflagellates and/or virus density at the surface
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Marine heatwaves and global warming impacts on winter waters in the Southern Indian Ocean J. Mar. Syst. (IF 2.8) Pub Date : 2023-12-28 Clara Azarian, Laurent Bopp, Jean-Baptiste Sallée, Sebastiaan Swart, Christophe Guinet, Francesco d'Ovidio
In the Southern Ocean, the term “winter waters” (WWs) refers to a water mass characterized by a subsurface layer of minimum temperature that plays an important ecological role for marine ecosystems, and in particular for top predators. Given that the Southern Ocean is experiencing warming and intense marine heatwaves (MHWs), particularly at subantarctic latitudes, we investigate here how different
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Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta J. Mar. Syst. (IF 2.8) Pub Date : 2023-12-21 Xuefeng Wu, Qing He, Jian Shen, Zhong Peng, Leicheng Guo, Weiming Xie, Jianliang Lin
Global climate change is altering the frequency and intensity of extreme weather events such as typhoons and cold fronts, and this is inducing physical changes and adaptions in estuaries and coasts. We conducted a field campaign on the subaqueous Changjiang Delta front in September 2019 to improve understanding of storm impact on short-term hydro-morphodynamics. Over an 11-day period, during which
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Climate-related habitat variations of Humboldt squid in the eastern equatorial Pacific Ocean J. Mar. Syst. (IF 2.8) Pub Date : 2023-12-13 Jian Wen, Ziying Zhou, Yang Zhang, Wei Yu, Bingjian Chen, Xinjun Chen
An integrated habitat suitability index (HSI) model was developed in this study for Dosidicus gigas in the eastern equatorial waters of the Pacific Ocean to explore climate-related spatial and temporal variability in the habitat distribution pattern based on three crucial environmental variables: sea surface temperature (SST), sea surface salinity (SSS) and chlorophyll-a concentration (Chl-a). Results
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Decomposing acoustic signal reveals the pelagic response to a frontal system J. Mar. Syst. (IF 2.8) Pub Date : 2023-12-10 L. Izard, N. Fonvieille, C. Merland, P. Koubbi, D. Nerini, J. Habasque, A. Lebourges-Dhaussy, C. Lo Monaco, G. Roudaut, F. d’Ovidio, J.-B. Charrassin, C. Cotté
The pelagic zone is home to a large diversity of organisms such as macrozooplankton and micronekton (MM), connecting the surface productive waters to the mesopelagic layers (200-1000 m) through diel vertical migrations (DVM). Active acoustics complement net sampling observations by detecting sound-scattering layers (SL) of organisms, allowing to monitor the MM dynamics with a high spatio-temporal resolution
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Clustering as a mechanism for enhanced reaction of buoyant species J. Mar. Syst. (IF 2.8) Pub Date : 2023-12-01 Jamie Meacham, Pavel Berloff
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Origin and evolution of the surface desalinated layer of the Kara Sea during the ice-free period J. Mar. Syst. (IF 2.8) Pub Date : 2023-12-01 Uliana Kazakova, Alexander Polukhin, Pavel Shabanov
This work focuses on the freshwater contribution (water from the Ob’ and Yenisei rivers and ice meltwater) to the surface layer of the Kara Sea according to 2015–2020 expedition data. Salinity and hydrochemical data (total alkalinity and silicates) were used to calculate the proportion of freshwater in the desalinated layer of the Kara Sea. The ratio of the water fractions with the linear mixing of
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Typology of planktonic food webs and associated emerging properties as indicators of the ecological status of a permanently disturbed Gulf of Gabès J. Mar. Syst. (IF 2.8) Pub Date : 2023-11-24 Oumayma Chkili, Blanche Saint Béat, Kaouther Mejri Kousri, Marouan Meddeb, Paula Gauvin, Valerie David, Georges Safi, Asma Sakka Hlaili, Nathalie Niquil
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CO2 fluxes under different oceanic and atmospheric conditions in the Southwest Atlantic Ocean J. Mar. Syst. (IF 2.8) Pub Date : 2023-11-23 Celina Cândida Ferreira Rodrigues, Marcelo Freitas Santini, Nathaniel Alan Brunsell, Luciano Ponzi Pezzi
The Southwest Atlantic Ocean (SAO) is one of the largest global carbon sink areas. Therefore, the main objective of this study is to investigate turbulent CO2 flux behavior and quantify it in the presence of an intense horizontal sea surface temperature (SST) gradient in the SAO under different atmospheric conditions. In-situ, satellite, and reanalysis data were used from October 14 to 27, 2018 to
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Effects of the Last Deglaciation climate warming on hydrate dissociation in the northern South China Sea J. Mar. Syst. (IF 2.8) Pub Date : 2023-11-07 Wenfeng Ruan, Cong Hu, Zhenghui Li, Yonggang Jia
Sea level and bottom water temperature variations caused by the Last Deglaciation climate warming impacted the stability of marine hydrates. In order to examine their influence on hydrate dissociation in the northern South China Sea (SCS), we conducted simulations to track the evolution of hydrate saturation and hydrate occurrence zone since the Last Deglaciation in the Dongsha Area, Shenhu Area, Xisha
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Exploring fishing impacts on the structure and functioning of the Yellow Sea ecosystem using an individual-based modeling approach J. Mar. Syst. (IF 2.8) Pub Date : 2023-11-08 Runlong Sun, Peng Sun, Haiqing Yu, Peilong Ju, Shuyang Ma, Zhenlin Liang, Mikko Heino, Yunne-Jai Shin, Nicolas Barrier, Yongjun Tian
The Yellow Sea is a marginal sea in the Northwestern Pacific where the fishery resources have been overfished and the community structure has greatly changed over the past six decades. Ecosystem modeling approaches are valuable tools to uncover potential mechanisms behind the ecosystem changes. Here, we developed ‘OSMOSE-YS’, an individual-based multi-species OSMOSE model that includes important commercial
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Bryozoan communities off Franz Josef Land (northern Barents Sea, Russia): Distribution patterns and environmental control J. Mar. Syst. (IF 2.8) Pub Date : 2023-11-07 Olga Yu. Evseeva, Alexander G. Dvoretsky
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Impact assessment of Cyclone Yaas on the mangrove forest area in the Bhitarkanika National Park (India) J. Mar. Syst. (IF 2.8) Pub Date : 2023-11-07 Manoranjan Mishra, Tamoghna Acharyya, Bijay Halder, Celso Augusto Guimarães Santos, Richarde Marques da Silva, Nihar Ranjan Rout, Debdeep Bhattacharyya
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Multiple island effects shape oceanographic processes and zooplankton size spectra off an oceanic archipelago in the Tropical Atlantic J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-31 Simone M.A. Lira, Ralf Schwamborn, Mauro de Melo Júnior, Humberto L. Varona, Syumara Queiroz, Doris Veleda, Alef J. Silva, Sigrid Neumann-Leitão, Moacyr Araujo, Catarina R. Marcolin
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Asynchronous contributions of decapod life history stages to the zooplankton of tropical estuarine, coastal and shelf ecosystems - new insights from semi-automatic image analysis J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-26 Denise Fabiana de Moraes Costa Schwamborn, Catarina R. Marcolin, Nathália Lins-Silva, Alexandre Oliveira de Almeida, Ralf Schwamborn
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Principal components-based hidden Markov model for automatic detection of whale vocalisations J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-20 A.M. Usman, D.J.J. Versfeld
Over the years, researchers have continued to put forward solutions to lessen the threats faced by whales within their ecosystem. The correct detection of the different species of whale is important in the search for solutions that will lessen the threats. In order to accurately detect and classify whale species, a number of techniques have been proposed over the years, with varying degrees of success
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Composition and distribution of the zooplankton community along the west coast of Baja California peninsula and its relationships with the environment variables J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-16 A.N. Sarmiento-Lezcano, G. Aceves-Medina, H. Villalobos, S. Hernández-Trujillo
The year 2014 is between one of the coldest La Niña events (2011−2012), and one of the most intense warming events between (2013–2016) in the California Current System (CCS). The information provided in this work documents part of the missing information about zooplankton and oceanographic features for the year 2014 along the southern portion of the CCS off the western Coast of Baja California Peninsula
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The effect of climate oscillations on skipjack tuna (Katsuwonus pelamis) in the Indian Ocean J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-11 Shigang Liu, Liyan Zhang, Rui Wang, Puqing Song, Xing Miao, Hai Li, Yuan Li, Longshan Lin
Skipjack tuna (Katsuwonus pelamis) (SKJ) is one of the most commercially important marine fish species distributed throughout the world's tropical and subtropical oceans. The Indian Ocean is a main fishing ground for SKJ, whose exploitation rate is just below the maximum sustainable yield. Therefore, SKJ stocks may potentially be significantly affected by climate change. In this study, climatic oscillation
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Effect of circulation at early life stages of European anchovy in the Bay of Biscay from observational data and a Lagrangian approach J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-11 Ivan Manso-Narvarte, Ainhoa Caballero, Ismael Hernández-Carrasco, Alejandro Orfila, María Santos Mocoroa, Unai Cotano, Gabriel Jordà, Amandine Declerck, Matthias Delpey, Anna Rubio
Coastal circulation influences the distribution of European anchovy (Engraulis encrasicolus) at early life stages (ELS) in the Bay of Biscay (BoB). However, how this happens is not yet fully understood. In this work, further insight is provided by performing Lagrangian diagnostics based on observations of ELS anchovies' initial distributions and currents. Surface diagnostics were obtained by using
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Corrigendum to “Variability of suspended sediment properties in the saline front of the highly stratified Magdalena River estuary, Colombia” [Journal of Marine Systems, Volume 241, January 2024, 103894] J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-05 Juan C. Restrepo, Oscar Ospino, Ana C. Torregroza-Espinosa, Silvio Ospino, Estefany Villanueva, Juan C. Molano-Mendoza, Carolina Consuegra, Yogesh Agrawal, Ole Mikkelsen
Abstract not available
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Trend and interannual variability of the Arabian Sea heat content J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-05 P.G. Nisha, T.S. Pranesha, P.J. Vidya, M. Ravichandran, Raghu Murtugudde
Long-term trend and interannual variability of heat content down to 300 m in the Arabian Sea during the period 2000–2017 are analyzed to understand the physical forcings that lead to the significant warming of the Arabian sea. The warming trend during spring and summer are primarily due to heat accumulated below the mixed layer (ML) while the heat accumulated in the ML contributes to the warming during
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Seasonal contrast of water masses and larval fish habitats at the entrance of the Gulf of California J. Mar. Syst. (IF 2.8) Pub Date : 2023-10-04 David Landeros-Tafolla, Laura Sánchez-Velasco, Emilio Beier, S.P.A. Jiménez-Rosenberg, J. Alejandro Kurczyn, Victor M. Godínez
Based on satellite and in situ data and larval fish distributions obtained from two cruises during April 2012 (cold period) and September 2016 (warm period), larval fish habitats were analyzed in relation to the water masses that converge at the entrance of the Gulf of California. The distribution of environmental variables and the ocean upper layer water masses showed a clear-cut seasonal contrast
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Physical mechanisms affecting phytoplankton variability along the Chilean coast J. Mar. Syst. (IF 2.8) Pub Date : 2023-09-18 Felipe Tornquist, Grant R. Bigg, Robert G. Bryant
Chile has high phytoplankton production due to being a classic example of an Eastern Boundary Upwelling System. Monthly averaged chlorophyll-α (Chl) and physical parameters (sea surface temperature, precipitation rate, southerly and westerly winds) were studied off the Chilean coast from 2002 to 2018, in order to understand the primary production along this important ocean margin. The coastal margin
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Interannual variability in otolith biogeochemical signatures of Japanese Spanish mackerel in the Yellow Sea J. Mar. Syst. (IF 2.8) Pub Date : 2023-09-17 Xindong Pan, Zhenjiang Ye, Jia Wo, Qingwang Xing, Jian Yang, Yong Chen, Yongjun Tian
Fishes often use multiple habitats to complete their life cycles, leading to their unique otolith biogeochemical signatures. Interannual variability in otolith biogeochemical signatures is expected as fish respond to annual environmental variations in their distribution areas. In this study, we focus on Japanese Spanish mackerel Scomberomorus niphonius, an abundant commercial species in the Yellow
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Wind-driven salinity tongue migration in the Gulf of Finland according to NEMO and ERA5 reanalyses J. Mar. Syst. (IF 2.8) Pub Date : 2023-09-12 Victor Zhurbas, Maria Golenko, Vadim Paka, Andrey Korzh
Two hypothesis that can be responsible for the wind-driven migration of the salinity tongue in the bottom layer of the Gulf of Finland (GoF) are tested based on the NEMO and ERA5 reanalyses. The first hypothesis authored by Krauss and Brügge (1991) implies along-channel wind developing upwelling and downwelling jet-like currents in the wind direction at opposite lateral boundaries of the channel, and
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Sargassum transport towards Mexican Caribbean shores: Numerical modeling for research and forecasting J. Mar. Syst. (IF 2.8) Pub Date : 2023-08-11 J.A. Lara-Hernández, C. Enriquez, J. Zavala-Hidalgo, E. Cuevas, B. van Tussenbroek, A. Uribe-Martínez
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Environmental and behavioural drivers of Antarctic krill distribution at the South Orkney Islands: A regional perspective J. Mar. Syst. (IF 2.8) Pub Date : 2023-08-02 Emma F. Young, Sally E. Thorpe, Angelika H.H. Renner, Eugene J. Murphy
Antarctic krill (Euphausia superba) is a key species in the marine ecosystem of the Southern Ocean, but is also the target of a commercial fishery, with an important fishing ground in the South Orkney Islands region. The potential for competition for krill between predators and the fishery requires risk management strategies for the fishery, underpinned by an understanding of the key physical and behavioural
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The effects of the Patagonian shelf-break front on copepod abundance, biodiversity, and assemblages J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-30 Ayelén Severo, Georgina Daniela Cepeda, Eduardo Marcelo Acha
Fronts play an important role in ecological processes, having multiple effects on the structure of plankton communities. The Argentine Sea is characterized by the presence of the large and very productive Patagonian shelf-break front (PSBF). This is a permanent front, with high thermohaline gradients defined between the relatively warmer and fresher shelf waters and those of the Malvinas Current. We
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Influences of catastrophic floods on the biogeochemistry of organic matter and nutrients in the Changjiang River estuary J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-30 Ailin Yao, Lei Gao, Yue Ming
Climate change is causing an increase in the intensity and frequency of extreme weather events globally. In the summers of 2016 and 2020, two catastrophic floods occurred in the Changjiang (Yangtze) River basin, resulting in the first and second largest monthly discharges since 2000. Understanding of how the coastal environments response to these extreme floods is important. Therefore, during each
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Variability in water quality of two meso-tidal estuaries of Odisha, East Coast of India J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-24 Asim Amitav Pattanayak, Sanhita Swain, Rashmi Ranjan Behera, Satyabrata Das Sharma, Chitta Ranjan Panda, Pratap Kumar Mohanty
The increasing human population and rapid development along the east coast of India pose potential threats to coastal water quality. To assess the water quality of two tropical estuaries of Odisha, India, diurnal and seasonal variations along with the influence of differential anthropogenic impacts have been studied. From the results, it was evident, the seasonal variations in the water quality were
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Seasonality modulates particulate organic carbon dynamics in mid-latitudes of South Pacific and South Atlantic Oceans J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-08 Mariana B. Bif, Jacqueline S. Long, Kenneth S. Johnson
Here we used data from six BGC-floats deployed in the southeast Pacific and southwest Atlantic Oceans, within the Southern Ocean's Subtropical Zone, to assess the seasonality of particulate organic carbon production from phytoplankton (POCphyto) and estimate POC transfer efficiencies at 100 m below the euphotic zone (T_100). While small particles <100 μM dominated the mixed layer, large particles >100 μM
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Surface floating objects moving from the Pearl River Estuary to Hainan Island: An observational and model study J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-09 Jintao Gu, Yu Zhang, Pengfei Tuo, Zhiyuan Hu, Shengli Chen, Jianyu Hu
A group of self-developed surface drifters were released near the Pearl River Estuary (PRE) from November to December 2021, and it is found that most of the drifters were finally stranded off the coast around Hainan Island after 10–30 days. This result makes us want to find out whether the surface floating objects around the PRE are converging on Hainan Island and what factors dominate this process
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Enhanced heavy metal discharges to marine deposits in glacial bays of two Arctic fjords (Hornsund and Kongsfjorden) J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-11
Climate change is transforming Arctic ecosystems in ways that are influencing the transport and accumulation of contaminants. The spatial and temporal variability of heavy metal distribution was studied in two Spitsbergen fjords – Kongsfjorden and Hornsund. Sediment cores from five stations in Kongsfjorden and six in Hornsund were collected in 2018–2019 and used for measurement of heavy metal concentrations
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Bottom-water hypoxia in the Paracas Bay (Peru, 13.8°S) associated with seasonal and synoptic time scale variability of winds and water stratification J. Mar. Syst. (IF 2.8) Pub Date : 2023-07-11 Lander Merma-Mora, François Colas, Jorge Cardich, Sonia Sánchez, Edgart Flores, Alberto Lorenzo, Arturo Aguirre-Velarde, David Correa, Dimitri Gutiérrez
Coastal hypoxia can occur naturally in inshore areas of the Eastern Boundary Upwelling Systems, influenced by the nutrient-rich and low-oxygen upwelling waters. This study aims to explore the influence of water stratification and winds on bottom-water hypoxia of the Paracas Bay, an area subjected to the most intense alongshore winds and active coastal upwelling in the Peruvian coast. Monitoring data
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The Sub-Antarctic Beagle Channel marine ecosystem: A regional and comprehensive sentinel of global change J. Mar. Syst. (IF 2.8) Pub Date : 2023-06-30 Gustavo A. Ferreyra, Humberto E. González
This special issue merges results obtained during a scientific expedition along the eastern Beagle Channel (BC) with previously available relevant data from the area. The expedition was conducted from 9 to 19 November 2019 on board the BIPO “Victor Angelescu”, a research vessel belonging to the National Institute for Fisheries Research and Development (INIDEP-Argentina). The cruise was the result of
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Seasonal and spatial variability of vertical particle flux along the Beagle Channel (Southern Patagonia) J. Mar. Syst. (IF 2.8) Pub Date : 2023-06-21 X. Flores-Melo, R. Giesecke, I.R. Schloss, M.P. Latorre, X. Durrieu de Madron, F. Bourrin, M.L. Spinelli, C. Menniti, H.E. González, E. Menschel, J. Martín
The Beagle Channel is a 300-km long passage connecting the Pacific and Atlantic Oceans at ~55° S, where glaciers and river streams meet subantarctic waters. Here we present the first evaluation of downward fluxes and composition of particulate matter in the channel. Settling particle fluxes were collected by sequential sediment traps deployed in two contrasting areas: one in the western part of the
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Algal growth and alkaline phosphatase activity of ‘green tide’ Chaetomorpha linum in response to phosphorus stress J. Mar. Syst. (IF 2.8) Pub Date : 2023-06-15 Jia-Hui Xie, Xue-Lin Shao, Kai Ma, Li Gao
Chaetomorpha linum is a bloom-forming macroalgae found all over the world. In the past 10 years, green tides dominated by Chaetomorpha spp. have broken out frequently in the phosphate-deficient Swan Lagoon, China. Here, we evaluated the changes in P concentration and alkaline phosphatase activity (APA) in water and sediments during the growth of C. linum in the laboratory experiment. The objective
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Stationarity and separation of the Sevastopol eddies in the Black Sea: The role of eddy-topographic interaction and submesoscale dynamics J. Mar. Syst. (IF 2.8) Pub Date : 2023-06-07 A.A. Kubryakov, A.I. Mizyuk, S.V. Stanichny
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Differential roles of anthropogenic CO2 in mediating seasonal amplitudes of ocean acidification metrics over a coastal coral habitat J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-29 Xu Dong, Di Qi, Baohong Chen, Yingxu Wu, Xinqing Zheng, Hui Lin
Seasonal-scale local forcings sharply reduce the coastal pH and aragonite saturation state (Ωaragonite). However, habitat-specific seasonality and control change signatures under increasing atmospheric CO2 are still poorly characterized. Here, we investigated carbonate system parameter dynamics over a Dongshan coral habitat that is greatly influenced by seasonal current patterns on the western Taiwan
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Wind-driven advection across temperature gradients enhances iron-induced phytoplankton blooms in the Antarctic Polar Front J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-19 F.P. Brandini, A.M. Silver, A. Gangopadhyay
We demonstrate how the wind-driven Ekman transport enhances the advection and mixing of cells from the colder waters of the Surface Antarctic Waters from the south to the warmer waters of the northern Polar Front (PF) belt. This mechanism provides cells a mean ambient temperature near optimum levels for specific species and, ultimately, for community growth rates high enough to develop blooms under
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Impact of new, navigable canal through the Vistula spit on the hydrologic balance of the Vistula lagoon (Baltic Sea) J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-16 Roman Cieśliński, Izabela Chlost, Michał Szydłowski
The object of research - the Vistula Lagoon is one of the two lagoons on the Polish coast, which is of great importance not only from an economic point of view, but also an environmental one. The purpose of the paper is to provide calculations on the current water balance for the Vistula Lagoon, before and after construction of a canal through the Vistula Spit. This is important because the construction
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Biochemical tracers in spiny icefish (Chaenodraco wilsoni) as indicators of variability in the diet of Antarctic krill (Euphausia superba) in a highly dynamic environment J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-18 Qingyuan Yang, Guoping Zhu
Spiny icefish (Chaenodraco wilsoni), a common high-Antarctic ichthyofauna icefish, exhibits variable feeding habits in regions around the Southern Ocean. In the Bransfield Strait (BS), C. wilsoni has received considerable attention as it preys predominantly on krill. Antarctic krill (Euphausia superba), the keystone species in the Southern Ocean, has a versatile feeding strategy, particularly in a
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Effect of hydropower dam flow regulation on salt-water intrusion: São Francisco River, Brazil J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-08 Bárbara P. Paiva, Carlos A.F. Schettini, Eduardo Siegle
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Rapid change in plankton community structure during spring along the eastern Beagle Channel J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-07 Andreana Cadaillon, Clara M. Iachetti, Ricardo Giesecke, Valeska Vásquez Lepio, Andrea Malits, Irene R. Schloss
In November 2019, a first joint Chilean–Argentinian research cruise was conducted along the eastern section of the Beagle Channel (BC). Here we present the results of the microbial plankton (2–200 μm cell size) abundance and composition analyses in relation to water masses and environmental variables, along a longitudinal transect characterized by contrasting hydrology. Plankton samples were analyzed
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Species identification of fish shoals using coupled split-beam and multibeam echosounders and two scuba-diving observational methods J. Mar. Syst. (IF 2.8) Pub Date : 2023-05-04 Viviane David, Anne Mouget, Pierre Thiriet, Corentin Minart, Yannick Perrot, Loïc Le Goff, Olivier Bianchimani, Solène Basthard-Bogain, Tristan Estaque, Justine Richaume, Jean-François Sys, Adrien Cheminée, Eric Feunteun, Anthony Acou, Patrice Brehmer
Species identification remains crucial for interpreting acoustic backscatter delivered by active acoustic methodologies. The study took place in a Marine Protected Area where highly restricted areas were present such as no take zones. We used an innovative methodology coupling split-beam and multibeam echosounders to detect and classify monospecific fish shoals (i.e. schools or aggregations). Species
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Numerical investigation of the transport and accumulation of conservative pollutants off Changjiang Estuary J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-23 Tong Cao, Di Tian, Feng Zhou, Min Bao
The increasing input of terrestrial pollutants is one of the major threats to coastal marine ecosystems. However, the impacts of pollutants discharged off the Changjiang Estuary (CJE) on the coastal waters of Zhejiang Province have not been quantitatively investigated. In this study, we focus on the transport processes of conservative pollutants discharged off the CJE using Eulerian tracers and Lagrangian
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Variability of suspended sediment properties in the saline front of the highly stratified Magdalena River estuary, Colombia J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-23 Juan C. Restrepo, Oscar Ospino, Ana C. Torregroza-Espinosa, Silvio Ospino, Estefany Villanueva, Juan C. Molano-Mendoza, Carolina Consuegra, Yogesh Agrawal, Ole Mikkelsen
Water samples were analyzed with an optical laser device (LISST 200×) to determine the properties of suspended sediments in the saline front of the Magdalena River mouth (Colombia, South America), a micro-tidal delta with high fluvial discharge of regional influence. The study aimed to determine variability of textural properties, suspended sediment concentration, effective density, and settling velocity
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Vertically distinct sources modulate stable isotope signatures and distribution of Mesozooplankton in central Patagonia: The Golfo de Penas - Baker Channel connection and analogies with the Beagle Channel J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-23 Leonardo R. Castro, Samuel Soto-Mendoza, Luciana Riccialdelli, María L. Presta, Pamela Barrientos, Humberto E. González, Giovanni Daneri, Marcelo Gutiérrez, Paulina Montero, Italo Masotti, Beatriz Díez
Using hydrographic and zooplankton sampling along with stable isotope analyses, we determined the influence of freshwater input and of oceanic water ingress at the Golfo de Penas to the Baker Channel (47°S), central Patagonia, on the zooplankton community during mid-spring. Our results show that different taxonomic and functional groups occurred within the mesozooplankton community along an offshore-inshore-oriented
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Sources and distribution of dissolved organic matter and inorganic nitrogen in waters of the southern Patagonian shelf and northern Drake Passage (51–56°S, 64–69°W) J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-20 John E. Garzón-Cardona, Ana M. Martínez, Boris P. Koch, Bernd Krock, Elbio D. Palma, Xianyu Kong, Rubén J. Lara
Dissolved organic matter (DOM) plays a crucial role in the biogeochemistry of coastal ecosystems, particularly nutrient cycling and distribution. Little is known about these processes in the highly productive Southern Patagonian shelf. This study was conducted to better understand the sources, composition, and behavior of DOM and inorganic nutrients in the sector between 51 and 56°S and 64–69°W with
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Spring phytoplankton distributions and primary productivity in waters off northern Norway J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-13 R. Meng, W.O. Smith, S.L. Basedow
The distributions of phytoplankton, zooplankton and hydrographic features off the coast of northern Norway were assessed in late April – early May 2019 using ship-based observations (CTD casts and Moving Vessel Profilers) and autonomous vehicles. A satellite chlorophyll climatology was generated to place our in-situ observations within a longer temporal sequence. Substantial spatial and temporal variability
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General circulation and tidal wave propagation along the Beagle Channel J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-05 Jacobo Martín, Guadalupe Alonso, Walter Dragani, Jens Meyerjürgens, Ricardo Giesecke, Andrea Cucco, Harold Fenco
The Beagle Channel (BC) is a subantarctic passage connecting the Pacific and Atlantic oceans at latitude ∼55°S. Along its tortuous path, the channel defines particular environments of prominent ecological value that are under study from a variety of scientific fields, while the main physical features that form the basis for these ecosystems are still critically understudied. In this work, historical
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Bio-optical properties of algal communities in Antarctic pack ice during spring J. Mar. Syst. (IF 2.8) Pub Date : 2023-04-05 Laura A. Dalman, Christina Schallenberg, Alexander D. Fraser, Sophie Bestley, Eun Jin Yang, Lesley Clementson, Klaus M. Meiners
Microalgae use Antarctic sea ice as habitat and accumulate in spring, leading to significant early-season production in Southern Ocean ecosystems. As key contributors to the marine food web and carbon fixation within the Antarctic pack-ice zone, ice algae depend on the light environment and their adaptability to irradiance extremes. This study examines spectral ice algal and non-algal particulate absorption