journal
https://read.qxmd.com/read/38479292/effects-of-dissolved-oxygen-changes-in-the-benthic-environment-on-phosphorus-flux-at-the-sediment-water-interface-in-a-coastal-brackish-lake
#21
JOURNAL ARTICLE
Yong-Hoon Jeong, Yong-Ho Choi, Dong-Heui Kwak
In semi-enclosed coastal brackish lakes, changes in dissolved oxygen in the bottom layer due to salinity stratification can affect the flux of phosphorus (P) at the sediment-water interface, resulting in short- and long-term water quality fluctuations in the water column. In this study, the physicochemical properties of the water layers and sediments at five sites in Saemangeum Lake were analyzed in spring and autumn for four years, and phosphorus release experiments from sediments were conducted for 20 days under oxic and anoxic conditions during the same period...
March 8, 2024: Marine Environmental Research
https://read.qxmd.com/read/38479296/a-matter-of-choice-understanding-the-interactions-between-epiphytic-foraminifera-and-their-seagrass-host-halophila-stipulacea
#22
JOURNAL ARTICLE
Jenipher Masawa, Gidon Winters, Moran Kaminer, Amir Szitenberg, Michal Gruntman, Sarit Ashckenazi-Polivoda
In sub/tropical waters, benthic foraminifera are among the most abundant epiphytic organisms inhabiting seagrass meadows. This study explored the nature of the association between foraminifera and the tropical seagrass species H. stipulacea, aiming to determine whether these interactions are facilitative or random. For this, we performed a "choice" experiment, where foraminifera could colonize H. stipulacea plants or plastic "seagrasses" plants. At the end of the experiment, a microbiome analysis was performed to identify possible variances in the microbial community and diversity of the substrates...
March 6, 2024: Marine Environmental Research
https://read.qxmd.com/read/38479294/assessment-of-the-impact-of-microplastic-ingestion-in-striped-red-mullets-from-an-eastern-mediterranean-coastal-area-zakynthos-island-ionian-sea
#23
JOURNAL ARTICLE
Danae Patsiou, Nikoletta Digka, Matteo Galli, Matteo Baini, Maria Cristina Fossi, Catherine Tsangaris
Monitoring microplastics (MPs) in the marine environment is an ongoing process, and our understanding of their impact on marine organisms is limited. The present study evaluates the effects of ingested MPs on the marine MP pollution bioindicator fish species Mullus surmuletus. The study follows a three-fold approach to assess the impact of MPs on marine organisms by investigating: 1) the ingestion of MPs, 2) the bioaccumulation of phthalate compounds as plastic additives, and 3) the evaluation of toxicological biochemical and cellular biomarkers...
March 6, 2024: Marine Environmental Research
https://read.qxmd.com/read/38479293/responses-of-soil-seed-bank-and-its-above-ground-vegetation-to-various-reclamation-patterns
#24
JOURNAL ARTICLE
Min Chen, Sarfraz Hussain, Yuhong Liu, Ghulam Mustafa, Bingtao Hu, Zhirui Qin, Xue Wang
Coastal land reclamation has become a primary strategy for alleviating conflicts between human development and land resource utilization. However, anthropogenic activities associated with land reclamation inevitably result in significant changes to coastal wetland ecosystems. Previous studies have mainly focused on the ecological consequences of land reclamation on above-ground vegetation, while overlooking the distinctions between different reclamation patterns and the critical role of soil seed bank in maintaining ecosystem stability...
March 6, 2024: Marine Environmental Research
https://read.qxmd.com/read/38467089/reduction-of-small-prey-capture-rate-and-collective-predation-in-the-bleached-sea-anemone-exaiptasiadiaphana
#25
JOURNAL ARTICLE
Chiara Gregorin, Marica Di Vito, Camilla Roveta, Torcuato Pulido Mantas, Stefano Gridelli, Federico Domenichelli, Lucrezia Cilenti, Tomás Vega Fernández, Stefania Puce, Luigi Musco
Cnidarians may dominate benthic communities, as in the case of coral reefs that foster biodiversity and provide important ecosystem services. Polyps may feed by predating mesozooplantkon and large motile prey, but many species further obtain autotrophic nutrients from photosymbiosis. Anthropogenic disturbance, such as the rise of seawater temperature and turbidity, can lead to the loss of symbionts, causing bleaching. Prolonged periods of bleaching can induce mortality events over vast areas. Heterotrophy may allow bleached cnidarians to survive for long periods of time...
March 6, 2024: Marine Environmental Research
https://read.qxmd.com/read/38460223/effects-of-ocean-acidification-and-polystyrene-microplastics-on-the-oysters-crassostrea-gigas-an-integrated-biomarker-and-metabolomic-approach
#26
JOURNAL ARTICLE
Yunchao Du, Jia Teng, Jianmin Zhao, Jingying Ren, Hengyuan Ma, Tianyu Zhang, Bin Xia, Shan Sun, Qing Wang
The adverse impacts of microplastics (MPs) or ocean acidification (OA) on mollusks have been widely reported, however, little is known about their combined effects on mollusks. The oysters Crassostrea gigas were exposed to two sizes of polystyrene MPs with 1 × 104 particles/L (small polystyrene MPs (SPS-MPs): 6 μm, large polystyrene MPs (LPS-MPs): 50-60 μm) at two pH levels (7.7 and 8.1) for 14 days. The antagonistic effects between MPs and OA on oysters were mainly observed...
March 5, 2024: Marine Environmental Research
https://read.qxmd.com/read/38489918/ingestion-and-depuration-of-polyester-microfibers-by-crassostrea-gasar-adanson-1757
#27
JOURNAL ARTICLE
Layse Rodrigues do Rozario Teixeira Lins, Miguel Saldaña-Serrano, Carlos Henrique Araújo de Miranda Gomes, Mariana Rangel Pilotto, Luiz Otávio de Barros Vilas Bôas, Deivid Medeiros da Costa, Camila Lisarb Velasquez Bastolla, Daína Lima, Marilia Tedesco, Tamiris Henrique Ferreira, Pietro Sinigaglia Lunelli, Antonio Pedro Novaes de Oliveira, Afonso Celso Dias Bainy, Diego José Nogueira
The study aimed to obtain environmentally relevant microfibers (MFs) from polyester fabric and assess their impact on the oyster Crassostrea gasar. MFs were obtained by grinding the fabric, and their accumulation in oysters gills and digestive glands was analyzed after exposure to 0.5 mg/L for 2 and 24 h. Additionally, a 48 h depuration was conducted on the oysters exposed for 24 h. Sublethal effects were assessed in oysters exposed for 24 h and depurated for 48 h, using biomarkers like Catalase (CAT), Glutathione S-transferase (GST), and Glutathione Peroxidase (GPx), along with histological analyses...
March 4, 2024: Marine Environmental Research
https://read.qxmd.com/read/38457908/assessment-of-metal-and-organic-pollutants-in-combination-with-stable-isotope-analysis-in-tunas-from-the-gulf-of-cadiz-east-atlantic
#28
JOURNAL ARTICLE
Marina G Pintado-Herrera, José A López-López, Pablo A Lara-Martín, Antonio Medina, Irene Cadenas, Sara Giansiracusa, Carmen Corada-Fernández, José L Varela
Bioaccumulation patterns of heavy metals (Pb, Cd, Cr, Ni, Fe and Cu) and organic (priority and emerging) pollutants, in combination with stable isotope analysis (SIA), were assessed in muscle and liver of three tuna species from the Gulf of Cadiz (Atlantic bluefin tuna, Thunnus thynnus; Atlantic bonito, Sarda sarda, and skipjack tuna, Katsuwonus pelamis). SIA and contaminant (heavy metal and organic) profiles separately discriminated between species. There was no significant overlap between the trophic niches estimated from isotopic data, suggesting that there are diet differences which may determine differential bioaccumulation patterns...
March 3, 2024: Marine Environmental Research
https://read.qxmd.com/read/38507984/microbial-community-structure-in-a-constructed-wetland-based-on-a-recirculating-aquaculture-system-exploring-spatio-temporal-variations-and-assembly-mechanisms
#29
JOURNAL ARTICLE
Wenjie Tian, Qiufen Li, Zijun Luo, Chao Wu, Bo Sun, Danting Zhao, Saisai Chi, Zhengguo Cui, Ailing Xu, Zhiwen Song
The diversity, composition and performance of microbial communities within constructed wetlands (CW) were markedly influenced by spatio-temporal variations. A pilot-scale integrated vertical-flow constructed wetland (IVCW) as the biological purification unit within a recirculating aquaculture system (RAS) was established and monitored in this study. The investigation aimed to elucidate the responses of community structure, co-occurrence networks, and assembly mechanisms of the microbial community to spatial and temporal changes...
March 2, 2024: Marine Environmental Research
https://read.qxmd.com/read/38437778/long-term-response-of-interspecific-competition-among-three-typical-bloom-forming-species-to-changes-in-phosphorus-and-temperature
#30
JOURNAL ARTICLE
Anglu Shen, Hongyue Liu, Yuanli Zhu, Jiangning Zeng
Phosphorus and temperature play an important role in the succession of diatom-dinoflagellate blooms. However, there is little long-term research on interspecific competition based on phosphorus source and temperature. Here, interspecific competition among Skeletonema costatum, Prorocentrum donghaiense and Karenia mikimotoi was studied using trialgal laboratory co-cultures under different phosphorus and temperature conditions. These results suggest that S. costatum and P. donghaiense alternated as competing dominant species during the experimental period, which coincides with the different phosphorus conditions...
March 1, 2024: Marine Environmental Research
https://read.qxmd.com/read/38447329/application-of-microresp%C3%A2-for-quick-and-easy-detection-of-plastic-degradation-by-marine-bacterial-isolates
#31
JOURNAL ARTICLE
Cristina Mitsumori, Shun Tsuboi, Mamiko Shimamura, Takamasa Miura
Microplastic debris in the marine environment is a global problem. Biodegradable polymers are being developed as alternatives to petroleum-based plastics, and quick and easy methods for screening for bacterial strains that can degrade such polymers are needed. As a screening method, the clear zone method has been widely used but has technical difficulties such as plate preparation and interpretation of results. In this study, we adapted the MicroResp™ system to easily detect biodegradation activity of marine bacteria in a 3-day assay...
February 28, 2024: Marine Environmental Research
https://read.qxmd.com/read/38442592/the-tolerance-of-two-marine-diatoms-to-diurnal-ph-fluctuation-under-dynamic-light-condition-and-ocean-acidification-scenario
#32
JOURNAL ARTICLE
Yu Shang, Jie He, Jingmin Qiu, Siyu Hu, Xin Wang, Tianzhi Zhang, Weili Wang, Xiaoyue Yuan, Juntian Xu, Futian Li
Coastal waters undergo dynamic changes in seawater carbonate chemistry due to natural and anthropogenic factors. Despite this, our current understanding of how coastal phytoplankton respond to fluctuating pH is limited. In the present study, we investigated the physiological responses of two coastal diatoms Thalassiosira pseudonana and Thalassiosira weissflogii to seawater acidification and diurnally fluctuating pH under natural solar irradiance. Seawater acidification did not significantly impact the growth, maximum and effective quantum yield of PSII, and photosynthetic rates of the two species...
February 28, 2024: Marine Environmental Research
https://read.qxmd.com/read/38442590/proxies-to-detect-hotspots-of-invertebrate-biodiversity-on-rhodolith-beds-across-the-southwestern-atlantic
#33
JOURNAL ARTICLE
Jaqueline Barreto Lino, Ivan Rodrigo Abrão Laurino, Pedro Augusto Dos Santos Longo, Cinthya Simone Gomes Santos, Fabio Dos Santos Motta, Ronaldo B Francini-Filho, Guilherme Henrique Pereira-Filho
Rhodolith beds are known worldwide to host high biodiversity to several taxa. Despite their importance, few ecological data explored the influence of rhodolith features and environmental variables on associated biodiversity, a gap that has been hampering the mapping of diversity hotspots and priority areas for conservation. In this study, we investigated large-scale spatial variations of rhodolith beds and their associated fauna, using annelid polychaetes as a biological model. We aimed to identify proxies, based on rhodolith features and environmental variables, to detect biodiversity hotspots across Southwestern Atlantic beds, laying the groundwork for mapping priority areas for conservation...
February 28, 2024: Marine Environmental Research
https://read.qxmd.com/read/38479295/seasonally-varying-biogeochemical-regime-around-the-coral-habitats-off-central-west-coast-of-india
#34
JOURNAL ARTICLE
Gayatri Shirodkar, Hema Uskaikar, S W A Naqvi, Anil Pratihary, Afreen Hussain, Damodar M Shenoy, Manguesh Gauns, B Manikandan, Saiprasad Manjrekar, Anagha Patil
The Western Indian Continental Shelf (WICS) experiences upwelling during the Southwest Monsoon (SWM), leading to deoxygenation and acidification of subsurface waters. The region has patchy growth of corals, e.g. in the Grande Island and Angria Bank. Measurements made during the late SWM of 2022 reveal that the shelf waters around the Grande Island were subject to varying environmental conditions, viz. lower temperature (21.3-26.1°C), oxygen (0-4.9 mL L-1 ) and pHT (7.506-7.927). Complete anoxia was associated with sulphide build-up to a maximum of 5...
February 27, 2024: Marine Environmental Research
https://read.qxmd.com/read/38461608/inorganic-osmolytes-and-enzymatic-biomarkers-from-the-manabi-oyster-crassostrea-cf-corteziensis-in-response-to-saline-stress
#35
JOURNAL ARTICLE
Karla Falconí, Édgar Zapata-Vívenes, César Lodeiros
Abrupt drops in salinity that occur in tropical estuaries during the equatorial rainy season led to hyposaline conditions which may reduce the populational density of oysters. To assess the effect of saline stress on physiological and metabolic responses of the Manabi oyster (Crassostrea cf. corteziensis) was exposed to 35, 30, 20,10 and 5‰ concentrations during 96 h. Inorganic osmolytes, pH, salinity, haemocyanin and protein concentration in the plasma as well as the number of oysters with closed valves were recorded...
February 27, 2024: Marine Environmental Research
https://read.qxmd.com/read/38442591/quantifying-larval-dispersal-portfolio-in-seabass-nurseries-using-otolith-chemical-signatures
#36
JOURNAL ARTICLE
Nils Teichert, Hélène Tabouret, Anne Lizé, Françoise Daverat, Anthony Acou, Thomas Trancart, Laure-Sarah Virag, Christophe Pécheyran, Eric Feunteun, Alexandre Carpentier
The temporal asynchronies in larvae production from different spawning areas are fundamental components for ensuring stability and resilience of marine metapopulations. Such a concept, named portfolio effect, supposes that diversifying larval dispersal histories should minimize the risk of recruitment failure by increasing the probability that at least some larvae successfully settle in nursery. Here, we used a reconstructive approach based on otolith chemistry to quantify the larval dispersal portfolio of the European seabass, Dicentrarchus labrax, across six estuarine nursery areas of the northeast Atlantic Ocean...
February 27, 2024: Marine Environmental Research
https://read.qxmd.com/read/38442589/hazards-of-microplastics-exposure-to-liver-function-in-fishes-a-systematic-review-and-meta-analysis
#37
REVIEW
Yu Sun, Qingfang Deng, Qiurong Zhang, Xin Zhou, Ruhai Chen, Siyu Li, Qing Wu, Huaguo Chen
Microplastics (5 mm - 1 μm) have become one of the major pollutants in the environment. Numerous studies have shown that microplastics can have negative impacts on aquatic organisms, affecting their liver function levels. However, the extent of these effects and their potential toxicological mechanisms are largely unknown. In this study, a meta-analysis and systematic review were conducted to assess the effects of microplastics on fish liver function and summarize the potential toxicological mechanisms of microplastic-induced liver toxicity...
February 27, 2024: Marine Environmental Research
https://read.qxmd.com/read/38437777/transient-species-driving-ecosystem-multifunctionality-insights-from-competitive-interactions-between-rocky-intertidal-mussels
#38
JOURNAL ARTICLE
Claudia Betancourtt, Alexis M Catalán, Diego F Morales-Torres, Daniela N Lopez, Valentina Escares-Aguilera, Luis P Salas-Yanquin, Joseline A Büchner-Miranda, Oscar R Chaparro, Jorge Nimptsch, Bernardo R Broitman, Nelson Valdivia
Anthropogenic biodiversity loss poses a significant threat to ecosystem functioning worldwide. Numerically dominant and locally rare (i.e., transient) species are key components of biodiversity, but their contribution to multiple ecosystem functions (i.e., multifunctionality) has been seldomly assessed in marine ecosystems. To fill this gap, here we analyze the effects of a dominant and a transient species on ecosystem multifunctionality. In an observational study conducted along ca. 200 km of the southeastern Pacific coast, the purple mussel Perumytilus purpuratus numerically dominated the mid-intertidal and the dwarf mussel Semimytilus patagonicus exhibited low abundances but higher recruitment rates...
February 27, 2024: Marine Environmental Research
https://read.qxmd.com/read/38428315/the-pharmaceutical-triclosan-induced-oxidative-stress-and-physiological-disorder-in-marine-organism-and-nanoparticles-as-a-potential-mitigating-tool
#39
JOURNAL ARTICLE
Imen Bouzidi, Anis Fkiri, Wiem Saidani, Abdelhafidh Khazri, Amine Mezni, Karine Mougin, Hamouda Beyrem, Badreddine Sellami
Environmental research plays a crucial role in formulating novel approaches to pollution management and preservation of biodiversity. This study aims to assess the potential harm of pharmaceutical triclosan (TCS) to non-target aquatic organism, the mussel Mytilus galloprovincialis. Furthermore, our study investigates the potential effectiveness of TiO2 and ZnO nanomaterials (TiO2 NPs and ZnO NPs) in degrading TCS. To ascertain the morphology, structure, and stability of the nanomaterials, several chemical techniques were employed...
February 27, 2024: Marine Environmental Research
https://read.qxmd.com/read/38430642/a-preliminary-study-on-benthic-nutrient-exchange-across-sediment-water-interfaces-in-a-shallow-marine-protected-area-of-the-northwestern-arabian-gulf
#40
JOURNAL ARTICLE
Amit Sarkar, Turki Al-Said, Syed Wajih Ahmad Naqvi, Ayaz Ahmed, Loreta Fernandes, Rakhesh Madhusoodhanan, Fathima Thuslim, Takahiro Yamamoto, Faiza Al-Yamani
Sedimentary processes are expected to play a crucial role in macronutrient cycling of the shallow Arabian Gulf. To investigate this aspect, sediment cores were collected from the shallow intertidal and subtidal expanses of the first Marine Protected Area (MPA) of Kuwait in the Northwestern Arabian Gulf (NAG). Porewater nutrient profiling and whole core incubation experiments were conducted to measure the nutrient fluxes, both with and without the addition of the nitrification inhibitor allylthiourea (ATU). The porewater data confirmed the potential of sediments to host multiple aerobic and anaerobic pathways of nutrient regeneration...
February 24, 2024: Marine Environmental Research
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