journal
https://read.qxmd.com/read/38537361/integrating-historical-and-recent-information-to-understand-chondrichthyan-dynamics-in-the-central-mediterranean
#1
JOURNAL ARTICLE
Fabio Fiorentino, Bruno Zava, Federico Quattrocchi, Fabrizio Serena
Chondrichthyans (sharks, rays, and chimaeras) are highly susceptible to the impacts of fisheries due to their vulnerable life-history traits. Over the last 100 years, several cases of local extinction have been documented in heavily fished areas across the Mediterranean Sea. In the Strait of Sicily (SoS), one of the main demersal fishing grounds of the Mediterranean, chondrichthyans constitute a significant component of both commercial and discarded bycatch. In this area, the lack of long-term data series on these species hinders our ability to fully comprehend the extent of changes due to both overfishing and climate variations...
March 24, 2024: Marine Environmental Research
https://read.qxmd.com/read/38537362/climatic-oceanic-freshwater-and-local-environmental-drivers-of-new-zealand-estuarine-macroinvertebrates
#2
JOURNAL ARTICLE
Orlando Lam-Gordillo, Judi E Hewitt, Emily J Douglas, Bruce D Dudley, Steven J Holmes, Sarah Hailes, Kelly Carter, Barry Greenfield, Tarn Drylie, Andrew M Lohrer
Understanding the responses of organisms to different environmental drivers is critical for improving ecosystem management and conservation. Estuarine ecosystems are under pressure from multiple anthropogenic stressors (e.g. increasing sediment and nutrient loads, pollution, climate change) that are affecting the functions and services these ecosystems provide. Here, we used long-term estuarine benthic invertebrate monitoring data (∼30 year time-series) to evaluate the responses of macrobenthic invertebrate communities and indicator species to climatic, oceanic, freshwater, and local environmental drivers in New Zealand estuaries...
March 21, 2024: Marine Environmental Research
https://read.qxmd.com/read/38531260/toxicity-assays-and-in-silico-approach-to-assess-the-impacts-of-chlorine-dioxide-on-survival-respiration-and-some-biochemical-markers-of-marine-zooplankton
#3
JOURNAL ARTICLE
S Satheesh, M M El-Sherbiny
Chlorination is the common antifouling method in desalination and power plant water intake structures to control microbial and macrofouling growth. In this study, the impacts of chlorine dioxide on toxicity, metabolic activity and biochemical markers like glutathione S-transferase and catalase enzyme activity were tested using four zooplankton species (Centropages sp., Acartia sp., Oncaea sp., and Calanus sp.) collected from the Red Sea. The zooplankton species were treated with different concentrations (0...
March 21, 2024: Marine Environmental Research
https://read.qxmd.com/read/38522122/spatial-structuring-of-mediterranean-fisheries-landings-in-relation-to-their-seasonal-and-long-term-fluctuations
#4
JOURNAL ARTICLE
Konstancja Woźniacka, Georgios Kerametsidis, Lucía López-López, Christian Möllmann, Manuel Hidalgo
The Western Mediterranean fisheries significantly contribute to the regional blue economy, despite evidence of ongoing, widespread overexploitation of stocks. Understanding the spatial distribution and population dynamics of species is crucial for comprehending fisheries dynamics combining local and regional scales, although the underlying processes are often neglected. In this study, we aimed to (i) evaluate the seasonal and long-term spatio-temporal fluctuations of crustacean, cephalopod, and fish populations in the Western Mediterranean, (ii) determine whether these fluctuations are driven by the spatial structure of the fisheries or synchronic species fluctuations, and (iii) compare groupings according to the individual species and life history-based groups...
March 21, 2024: Marine Environmental Research
https://read.qxmd.com/read/38522120/spatial-and-ontogenetic-modulation-of-fatty-acid-composition-in-juvenile-european-sea-bass-dicentrarchus-labrax-from-two-french-estuaries
#5
JOURNAL ARTICLE
Mickaël Péron, Romain Gonzalvez, Sarah Hue, Philippe Soudant, Fabienne Le Grand, David Mazurais, Marie Vagner
This study evaluated how estuary of origin and ontogenetic stage influence the fatty acid (FA) composition in the tissues of wild European sea bass juvenile. We evidenced tissue-specific patterns, with the brain exhibiting a distinct FA composition from the liver and muscle. Ontogenetic stage and estuary influenced the general FA profile, and particularly the essential FA (EFA) like docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), and arachidonic acid (ARA) in all tissues. The data also revealed the ability of wild sea bass to modulate, at the molecular level, FA biosynthesis pathways and suggest a potential dietary DHA limitation in the natural environment...
March 21, 2024: Marine Environmental Research
https://read.qxmd.com/read/38522121/physicochemical-variables-influencing-the-abundance-of-atlantic-goliath-grouper-juveniles-epinephelus-itajara-in-a-tropical-brazilian-mangrove-habitat
#6
JOURNAL ARTICLE
Mario V Condini, Rafael L Oliveira, Lorena L Almeida, Ester F Barbosa, Ana C Martins, Áthila A Bertoncini, Maurício Hostim-Silva
The purpose of this study was to investigate the relationships between the abundance and occurrence of juvenile Atlantic goliath grouper and physicochemical variables in a tropical mangrove ecosystem, employing a non-lethal methodology. Juvenile Atlantic goliath grouper individuals were captured biweekly, using blue crab traps, across three locations within the São Mateus estuary (18°36'S, 39°44'W), from August 2021 to July 2022. Simultaneously, the physicochemical water variables were assessed during each trap inspection...
March 20, 2024: Marine Environmental Research
https://read.qxmd.com/read/38520956/impact-of-hypoxia-on-glucose-metabolism-and-hypoxia-signaling-pathways-in-juvenile-horseshoe-crabs-tachypleus-tridentatus
#7
JOURNAL ARTICLE
Lingfeng Jiang, Yueyong Shang, Yuntian Shi, Xiaowan Ma, Malik ShahZaib Khalid, Meilian Huang, James Kar-Hei Fang, Youji Wang, Kianann Tan, Menghong Hu
Marine hypoxia poses a significant challenge in the contemporary marine environment. The horseshoe crab, an ancient benthic marine organism, is confronted with the potential threat of species extinction due to hypoxia, making it an ideal candidate for studying hypoxia tolerance mechanisms. In this experiment, juvenile Tachypleus tridentatus were subjected to a 21-day trial at DO:2 mg/L (hypoxia) and DO:6 mg/L conditions. The experimental timeline included a 14-day exposure phase followed by a 7-day recovery period...
March 19, 2024: Marine Environmental Research
https://read.qxmd.com/read/38519355/biological-patterns-of-reproduction-of-the-brazilian-sardine-sardinella-brasiliensis-in-the-purse-seine-fishery-of-southwest-atlantic-ocean-a-long-term-assessment
#8
JOURNAL ARTICLE
Rafael Schroeder, Angélica Petermann, Paulo R Schwingel, Alberto T Correia
Recent estimates of the size at first maturity (L50 ) of Sardinella brasiliensis showed contradictory results with a decreasing in the fish stock biomass encompassed by increasing values of L50 . The methodological approach used hereby allowed to separate sardines classified in the virginal maturity stage from those categorized in the recovery stage, and ready for one next spawning event. This study evaluated the hypothesis of the existence of separated stocks experiencing distinct environmental conditions and fishing pressures which may have altered L50 estimates using a robust dataset based on biological samples collected along the entire species distribution area in the southeast-south Brazilian coast [Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), Santa Catarina (SC) and Rio Grande do Sul (RS)] between 2000 and 2018...
March 15, 2024: Marine Environmental Research
https://read.qxmd.com/read/38518406/large-reductions-in-nutrient-losses-needed-to-avoid-future-coastal-eutrophication-across-europe
#9
JOURNAL ARTICLE
Aslıhan Ural-Janssen, Carolien Kroeze, Erik Meers, Maryna Strokal
Rapid technological development in agriculture and fast urbanization have increased nutrient losses in Europe. High nutrient export to seas causes coastal eutrophication and harmful algal blooms. This study aims to assess the river exports of nitrogen (N) and phosphorus (P), and identify required reductions to avoid coastal eutrophication in Europe under global change. We modelled nutrient export by 594 rivers in 2050 for a baseline scenario using the new MARINA-Nutrients model for Europe. Nutrient export to European seas is expected to increase by 13-28% under global change...
March 15, 2024: Marine Environmental Research
https://read.qxmd.com/read/38513386/nutrient-budgets-and-biogeochemical-dynamics-in-the-coastal-regions-of-northern-beibu-gulf-south-china-sea-implication-for-the-severe-impact-of-human-disturbance
#10
JOURNAL ARTICLE
Jing Guo, Fei Yang, Ozeas S Costa, Xiaomin Yan, Man Wu, Hengtong Qiu, Wanyi Li, Guilin Xu
This study examined the nutrient budgets and biogeochemical dynamics in the coastal regions of northern Beibu Gulf (CNBG). Nutrient concentrations varied spatially and seasonally among the different bays. High nutrient levels were found in the regions with high riverine inputs and intensive mariculture. Using a three end-member mixing model, nutrient biogeochemistry within the ecosystem was estimated separately from complex physical mixing effects. Nutrient consumption dominated in most bays in summer, whereas nutrient regeneration dominated in winter, likely due to phytoplankton decomposition, vertical mixing and desorption...
March 15, 2024: Marine Environmental Research
https://read.qxmd.com/read/38507985/patch-age-alters-seagrass-response-mechanisms-to-herbivory-damage
#11
JOURNAL ARTICLE
Rocío Jiménez-Ramos, Luis G Egea, Claudia J Pérez-Estrada, Eduardo F Balart, Juan J Vergara, Fernando G Brun
Natural disturbances can produce a mosaic of seagrass patches of different ages, which may affect the response to herbivory. These pressures can have consequences for plant performance. To assess how seagrass patch age affects the response to herbivory, we simulated the effect of herbivory by clipping leaves of Halodule wrightii in patches of 2, 4 and 6 years. All clipped plants showed ability to compensate herbivory by increasing leaf growth rate (on average 4.5-fold). The oldest patches showed resistance response by increasing phenolic compounds (1...
March 15, 2024: Marine Environmental Research
https://read.qxmd.com/read/38507983/ingestion-and-adherence-of-microplastics-by-estuarine-mysid-shrimp
#12
JOURNAL ARTICLE
Hattaya Jitrapat, Itchika Sivaipram, Ajcharaporn Piumsomboon, Supakij Suttiruengwong, Jiayi Xu, Tuan Linh Tran Vo, Daoji Li
Microplastics have been reported to be present in zooplankton, yet questions persist regarding their fate and dynamics within biota. We selected the commercial mysid shrimp, Mesopodopsis orientalis, as the focal zooplankton for this study due to their crucial role in our study area, the Inner Gulf of Thailand in January 2022. We investigated the presence of microplastics in mysid bodies and fecal pellets, examining both attached microplastics on external body parts and those ingested. In addition, we conducted microplastic feeding experiments, exposing mysids to various treatments of microplastics...
March 15, 2024: Marine Environmental Research
https://read.qxmd.com/read/38518407/fishing-damage-to-cloud-sponges-may-lead-to-losses-in-associated-fish-communities-in-pacific-canada
#13
JOURNAL ARTICLE
Fiona T Francis, Lily Burke, Jeff Marliave, Jessica Schultz, Laura Borden, Amanda Weltman, Anya Dunham
Glass sponge gardens are important biogenic habitats that support fish communities in Pacific Canada. However, glass sponges (class Hexactinellida) are delicate and susceptible to damage from fishing gear such as downriggers. In this study we document changes in a fish community before -and after damage from a presumed fishing event that resulted in a reduction of 58.9% of the available sponge habitat in a small cloud sponge garden in British Columbia. This habitat loss coincided with a decline of 76.9% of the relative abundance of rockfish, an economically important group of fishes, at the garden...
March 12, 2024: Marine Environmental Research
https://read.qxmd.com/read/38492505/diversity-and-distribution-analysis-of-eukaryotic-communities-in-the-xiangshan-bay-east-china-sea-by-metabarcoding-approach
#14
JOURNAL ARTICLE
Shuangqing Li, Ningjian Luo, Chuang Li, Shuoqian Mao, Hailong Huang
Eukaryotic communities play an important role in the coastal ecosystem of Xiangshan Bay, a narrow semi-closed bay famous for fisheries and marine farming. However, information on the diversity and composition of eukaryotic communities in Xiangshan Bay remains unclear. In this study, the metabarcoding approach was utilized to comprehensively investigate the eukaryotic plankton community structure and dominant taxa, particularly eukaryotic microalgae, in the Xiangshan Bay over a period of four months in 2018...
March 12, 2024: Marine Environmental Research
https://read.qxmd.com/read/38492504/biological-soil-crust-elicits-microbial-community-and-extracellular-polymeric-substances-restructuring-to-reduce-the-soil-erosion-on-tropical-island-south-china-sea
#15
JOURNAL ARTICLE
Lin Wang, Jie Li, Si Zhang, Yadong Huang, Zhiyuan Ouyang, Zhimao Mai
Soil erosion stands as the preeminent environmental concern globally, attaining heightened significance, particularly within islands where land resources prove notably scarce. Biological soil crusts, referred to as biocrusts, assume a pivotal ecological role in soil conservation. Notably, they augment the horizontal stability of the substrate through the exudation of microbial extracellular polymeric substances (EPS), thereby shielding the soil against shear stress, exemplified in the form of water erosion...
March 12, 2024: Marine Environmental Research
https://read.qxmd.com/read/38492324/predator-prey-interactions-in-a-coastal-setting-linking-crab-feeding-rates-to-small-scale-distribution-of-clams
#16
JOURNAL ARTICLE
Pedro A Quijón
A coastal predator-prey system, juvenile green crabs (Carcinus maenas) preying upon juvenile hard clams (Mercenaria mercenaria), was used to explore the link between crab predation rates and clam density and small-scale distribution patterns. The channel working area of a racetrack flume was adapted to form a sedimentary arena in a flowing seawater system (5 cm s-1 ) to assess crab predation rates in relation to clam density and distribution patterns (clams clustered in one patch vs two nearby vs two farther apart)...
March 12, 2024: Marine Environmental Research
https://read.qxmd.com/read/38492503/sink-source-connectivity-for-restocking-of-pinna-nobilis-in-the-western-mediterranean-sea
#17
JOURNAL ARTICLE
A Feria-Rodríguez, D March, B Mourre, I E Hendriks, M Vázquez-Luis
The critically endangered endemic bivalve Pinna nobilis from the Mediterranean Sea suffered a sudden population decline after a mass mortality event in early autumn 2016. Conservation efforts aimed at preventing extinction included safeguarding resistant individuals and implementing a breeding plan to contribute to the repopulation of the species. This study utilized a model combining Lagrangian dispersion and connectivity analyses to pinpoint optimal restocking sites in the Western Mediterranean. Our approach allowed to identify locations capable of sustaining and generating larvae for broader repopulation in key areas of the Western Mediterranean Sea prior to the mass mortality event...
March 11, 2024: Marine Environmental Research
https://read.qxmd.com/read/38489919/machine-learning-based-prediction-of-seasonal-hypoxia-in-eutrophic-estuary-using-capacitive-potentiometric-sensor
#18
JOURNAL ARTICLE
Seongsik Park, Kyunghoi Kim, Tadashi Hibino, Kyeongmin Kim
A hypoxia occurred in eutrophic estuary was predicted using long short-term memory (LSTM) model with prediction time steps (PTSs) of 0, 1, 12, and 24 h. A capacitive potential (CP), which provides quantitative information on dissolved oxygen (DO) concentration, was used as a predictor along with precipitation, tide level, salinity, and water temperature. First, annual changes in DO concentration were clustered in three phases of annual DO trends (oversaturation, depletion, and stable) using k-means clustering...
March 11, 2024: Marine Environmental Research
https://read.qxmd.com/read/38484651/quantum-of-fear-herbivore-grazing-rates-not-affected-by-reef-shark-presence
#19
JOURNAL ARTICLE
Sterling B Tebbett, Sasha I Faul, David R Bellwood
Grazing by nominally herbivorous fishes is widely recognised as a critical ecosystem function on coral reefs. However, several studies have suggested that herbivory is reduced in the presence of predators, especially sharks. Nevertheless, the effects of shark presence on grazing, under natural settings, remains poorly resolved. Using ∼200 h of video footage, we quantify the extent of direct disturbance by reef sharks on grazing fishes. Contrary to expectations, grazing rate was not significantly suppressed due to sharks, with fishes resuming feeding in as little as 4 s after sharks passed...
March 11, 2024: Marine Environmental Research
https://read.qxmd.com/read/38484649/competition-between-ocean-thermal-structure-and-tropical-cyclone-characteristics-modulates-ocean-environmental-responses-in-the-yellow-and-bohai-seas
#20
JOURNAL ARTICLE
Xiuting Wang, Jiagen Li, Liang Sun, Mengyuan Xu, Haihua Liu, Rui Liu
To study the environmental responses of tropical cyclones (TCs) in continental shelf regions, TCs passing over the Yellow Sea and Bohai Sea (YBS) during 2002-2020 were investigated, with a special focus on how competition between ocean thermal structure and TC characteristics modulates ocean surface changes. The spatial distributions of the climatic mixed layer depth (MLD), accumulated wind forcing power index (WPi), accumulated sea surface temperature (SST) changes and accumulated chlorophyll (Chl-a) changes in the YBS were calculated...
March 10, 2024: Marine Environmental Research
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