Marine environmental research最新文献

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Microplastic biofilms promote the horizontal transfer of antibiotic resistance genes in estuarine environments. 微塑料生物膜促进了河口环境中抗生素抗性基因的水平转移。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-10-03 DOI: 10.1016/j.marenvres.2024.106777
Yangyuan Zhou, Guosheng Zhang, Dawei Zhang, Ningzheng Zhu, Jinpei Bo, Xiangzhou Meng, Yao Chen, Yu Qin, Huajie Liu, Weiying Li
{"title":"Microplastic biofilms promote the horizontal transfer of antibiotic resistance genes in estuarine environments.","authors":"Yangyuan Zhou, Guosheng Zhang, Dawei Zhang, Ningzheng Zhu, Jinpei Bo, Xiangzhou Meng, Yao Chen, Yu Qin, Huajie Liu, Weiying Li","doi":"10.1016/j.marenvres.2024.106777","DOIUrl":"https://doi.org/10.1016/j.marenvres.2024.106777","url":null,"abstract":"<p><p>As emerging pollutants, microplastics can aggregate microorganisms on their surfaces and form biofilms, enriching antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs). Consequently, microplastic biofilms have become a focal point of research. Horizontal gene transfer is one of the primary mechanisms by which bacteria acquire antibiotic resistance, with much of the research focusing on suspended bacteria. However, microplastic biofilms, as hotspots for horizontal gene transfer, also merit significant investigation. This study primarily explored and compared the frequency of ARG conjugative transfer between suspended bacteria and microplastic biofilms. The results demonstrated that, compared to suspended bacteria, microplastic biofilms enhanced the frequency of ARG conjugative transfer by 7.2-19.6 times. Among them, biofilms on polyethylene microplastics showed the strongest promotion of conjugation. After the formation of microplastic biofilms, there was a significant increase in bacterial density within the biofilms, which raised the collision frequency of donor and recipient bacteria. Then microplastic biofilms facilitated the gene expression levels of outer membrane proteins, enhanced bacterial gene transfer capabilities, promoted the synthesis of conjugative pili, accelerated the formation of conjugative pairing systems, and elevated the expression levels of genes related to DNA replication and transfer systems, thereby enhancing the conjugative transfer of ARGs within microplastic biofilms. Among different types of microplastic biofilms, polyethylene biofilms exhibited the highest bacterial density, thus showing the highest frequency of ARG conjugation. This study highlights the risks associated with ARG conjugative transfer following the formation of microplastic biofilms and provides insights into the risks of microplastic and antibiotic resistance propagation in estuarine environments.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142378021","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}
引用次数: 0
Mutligenerational chronic exposure to near future ocean acidification in European sea bass (Dicentrarchus labrax): Insights into the regulation of the transcriptome in a sensory organ involved in feed intake, the tongue. 欧洲鲈鱼(Dicentrarchus labrax)近未来海洋酸化的隔代慢性暴露:洞察与饲料摄入有关的感觉器官--舌头的转录组调控。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-10-01 DOI: 10.1016/j.marenvres.2024.106775
David Mazurais, Victor Simon, Pauline Auffret, Alexandre Cormier, Alexandra Dauvé, Lauriane Madec, Baptiste Tanguy-Guillo, Nicolas Gayet, Elodie Fleury, Jérémy Le Luyer
{"title":"Mutligenerational chronic exposure to near future ocean acidification in European sea bass (Dicentrarchus labrax): Insights into the regulation of the transcriptome in a sensory organ involved in feed intake, the tongue.","authors":"David Mazurais, Victor Simon, Pauline Auffret, Alexandre Cormier, Alexandra Dauvé, Lauriane Madec, Baptiste Tanguy-Guillo, Nicolas Gayet, Elodie Fleury, Jérémy Le Luyer","doi":"10.1016/j.marenvres.2024.106775","DOIUrl":"https://doi.org/10.1016/j.marenvres.2024.106775","url":null,"abstract":"<p><p>In this study, we examined the effect of near future ocean acidification (OA) on the transcriptome of a sensory organ in contact with surrounding water, the tongue in adult European sea bass (Dicentrarchus labrax) by mean of RNAseq experiment. We acquired a total of 14.1 Mb quality-trimmed reads covering 18,703 expressed genes from the tongue of fish reared from two generations at actual (pH 8.0 condition) and predicted near-future seawater pH (pH 7.6 condition). Gene ontologies analyses of expressed genes support the evidence that the tongue exhibits biological processes related to the sensory system, tooth mineralization and immune defences among others. Our data revealed only 295 OA-induced regulated genes with 114 up- and 181 down-regulated by OA. Functions over-represented encompass processes involved in organic substance metabolic process, RNA metabolism and especially RNA methylation which, combined with the regulation of some hsp genes expression, suggest a molecular response to stress which might contribute to lingual cell homeostasis under OA. The immune system process is also found enriched within OA-induced regulated genes. With the exception of one fatty acid receptor, known taste perception effectors were not impacted by OA in the tongue. However, a complementary droplet digital PCR approach dedicated to genes involved in gustatory signal transduction revealed the down regulation by OA of pyrimidinergic receptor (p2ry4) transcript expression in the gills of the fish. Combined with scanning electron microscopy analysis, our RNAseq data revealed that OA has no impact on processes related to teeth development and mineralization. Altogether, our data reveal that multigenerational exposure to OA has not a substantially effect on the tongue transcriptome but emphasis should be placed on investigating the potential physiological consequences related to the regulation of genes related to cell stress, immune system and fatty acid sensitivity to conclude on species resilience in face of OA.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381244","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}
引用次数: 0
Quarry rock reef design features influence fish assemblage structure across a systematically heterogenous restoration reef. 采石场岩礁设计特征影响系统异质修复岩礁上的鱼群结构。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-30 DOI: 10.1016/j.marenvres.2024.106773
James W Sturges, Jeremy T Claisse
{"title":"Quarry rock reef design features influence fish assemblage structure across a systematically heterogenous restoration reef.","authors":"James W Sturges, Jeremy T Claisse","doi":"10.1016/j.marenvres.2024.106773","DOIUrl":"https://doi.org/10.1016/j.marenvres.2024.106773","url":null,"abstract":"<p><p>To restore an area of temperate rocky-reef degraded by sedimentation, scour, and burial, a large quarry rock reef, the Palos Verdes Restoration Reef (PVR), was built with a heterogenous design including high relief elements intended to increase fish biomass productivity and support a diverse reef community. The replicated design features provide a unique opportunity to study the effects of reef design on fish habitat use patterns. To determine how submodule scale habitat features are associated with variation in the assemblage structure of eleven focal fish species on the PVR we conducted diver-operated stereo-video surveys on all 18 PVR modules 9-13 months after construction. The highest mean densities of most focal fish species and highest total fish densities were observed on high and medium-relief reef submodules and their adjacent ecotones positioned on the offshore sides or ends of modules. These included the most abundant species on the PVR, the zooplanktivorous Blacksmith (Chromis punctipinnis), as well as the fishery species Kelp Bass (Paralabrax clathratus) and California Sheephead (Bodianus pulcher). On the inshore side of parallel modules, the reef and ecotone transects on low and medium relief submodules exhibited the lowest total mean fish densities, and consistently lower mean focal fish species densities. Focal fish species assemblages also differed between the reef and sand-rock ecotone transects. Reef-resident planktivorous fishes likely contribute to reef primary and secondary productivity through consumer mediated nutrient transport and are an important consideration in restoration reef design. Future reef restoration designs should consider incorporating replicated heterogeneous design features including the placement of higher relief elements relative to shore and current patterns as a special consideration for providing habitat for planktivorous reef-resident fishes.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142378022","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}
引用次数: 0
Microbial ocean-atmosphere transfer: The influence of sewage discharge into coastal waters on bioaerosols from an urban beach in the subtropical Atlantic. 海洋-大气微生物转移:向沿海水域排放污水对亚热带大西洋城市海滩生物气溶胶的影响。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-27 DOI: 10.1016/j.marenvres.2024.106765
Jamille da Silva Rabelo, Fátima Cristiane Teles de Carvalho, Rosa Helena Rebouças, Oscarina Viana de Sousa
{"title":"Microbial ocean-atmosphere transfer: The influence of sewage discharge into coastal waters on bioaerosols from an urban beach in the subtropical Atlantic.","authors":"Jamille da Silva Rabelo, Fátima Cristiane Teles de Carvalho, Rosa Helena Rebouças, Oscarina Viana de Sousa","doi":"10.1016/j.marenvres.2024.106765","DOIUrl":"https://doi.org/10.1016/j.marenvres.2024.106765","url":null,"abstract":"<p><p>All over the world, the oceans are the final destination of sewage transported by river estuaries, rainwater and other coastal discharges. The risks to human health related to direct contact with water and consumption of contaminated fish are well known, but little is known about the potential for atmospheric exposure to pollutants and pathogens from contaminated seawater. The release of microbial particles from the sea into the atmosphere occurs mainly by the eruption of rising bubbles through the sea surface microlayer (SML) or by sea spray. We investigated the heterotrophic bacteria density and relative abundance in SML and bioaerosols originated on the seafront of Fortaleza (Atlantic coastal zone, northeastern Brazil) influenced by wastewater disposal. There was a difference in the density of total heterotrophic bacteria (THB) according to the matrix analyzed during two seasons: the bacterial count was highest in the SML during the rainy season while the highest number of bacteria in bioaerosols samples was recorded during the dry season. Twenty-nine bacterial taxonomic groups were identified with variable abundance for both environments. These were the same in both matrices, with environmental variables influencing their abundance and composition. The contribution of the marine and continental environments in shaping the microbiota of the SML and coastal bioaerosols was clear, with the constant and representative presence of Enterobacteria standing out. The aerosolization of bacteria resulting from the discharge of untreated sewage is an important issue related to coastal environmental health and ecological safety.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142365770","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}
引用次数: 0
Skeletal magnesium content in Antarctic echinoderms along a latitudinal gradient 沿纬度梯度南极棘皮动物的骨骼镁含量。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-26 DOI: 10.1016/j.marenvres.2024.106771
{"title":"Skeletal magnesium content in Antarctic echinoderms along a latitudinal gradient","authors":"","doi":"10.1016/j.marenvres.2024.106771","DOIUrl":"10.1016/j.marenvres.2024.106771","url":null,"abstract":"<div><div>Ocean warming and acidification driven by anthropogenic CO<sub>2</sub> emissions may impact the mineral composition of marine calcifiers. Species with high skeletal Mg content could be more susceptible in polar regions due to the increased solubility of CO<sub>2</sub> at lower temperatures. We aimed to assess the environmental influence on skeletal Mg content of Antarctic echinoderms belonging to Asteroidea, Ophiuroidea, Echinoidea and Holothuroidea classes, along a latitudinal gradient from the South Shetland Islands to Rothera (Adelaide Island). We found that all skeletal structures, except for echinoid spines, exhibited high Mg content, with asteroids showing the highest levels. Our results suggest that asteroids and holothuroids exert a higher biological capacity to regulate Mg incorporation into their skeletons. In contrast, the variability observed in the skeletal Mg content of ophiuroids and echinoids appears to be more influenced by local environmental conditions. Species-specific differences in how environmental factors affect the skeletal Mg content can thus be expected as a response to global climate change.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142349519","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}
引用次数: 0
Ecotoxicity of bromate and human health risks resulting from wastewater treatment units' effluents associated with some key physicochemical parameters in two hotspots connected to the Egyptian Mediterranean Sea. 在与埃及地中海相连的两个热点地区,与一些关键理化参数相关的废水处理装置排出的溴酸盐的生态毒性和人类健康风险。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-26 DOI: 10.1016/j.marenvres.2024.106768
Gehan M El Zokm, Ghada F El-Said, Naglaa F Soliman
{"title":"Ecotoxicity of bromate and human health risks resulting from wastewater treatment units' effluents associated with some key physicochemical parameters in two hotspots connected to the Egyptian Mediterranean Sea.","authors":"Gehan M El Zokm, Ghada F El-Said, Naglaa F Soliman","doi":"10.1016/j.marenvres.2024.106768","DOIUrl":"https://doi.org/10.1016/j.marenvres.2024.106768","url":null,"abstract":"<p><p>This study is the first of its kind in terms of focusing on the seasonal monitoring of bromine species (bromide<sup>-</sup> and bromate) and some of the main physicochemical parameters in the surface water of stations inside and in front of the El Noubareya and El-Umum drains that flow directly or indirectly to the Egyptian Mediterranean coast at A (El Noubareya Drain) and B (El-Mex Bay) sites. Among the bromine species, bromate (BrO<sub>3</sub><sup>-</sup>) is a disinfection byproduct considered by many international agencies to have a potential carcinogenic effect in humans and is also known to be ecologically toxic to aquatic organisms. Drain water samples collected from the studied sites A and B had a bromide/chlorinity ratio (3.85E-03 - 6.25E-03 and 3.27E-03 - 6.97E-03, respectively) significantly higher than the typical value for open seawater (3.50E-03), showing significant dilution with wastewater at drain stations in the investigated sites. The source and origin of bromine species and the major ions studied associated with the wastewater units were identified and tracked by calculating the ion/chlorinity ratio and multivariate analysis. The total hazard quotient (THQ) for bromate intake and dermal exposure in children, females, and males demonstrates negligible harm to human health. The toxic unit (TU) and the sum of toxic units (STU) values of the three trophic levels in the surface water for the two sites under investigation yielded approximately comparable values for risk quotient (RQ) and mixture risk characterization ratios (RCR<sub>mix(MEC/PNEC)</sub>), indicating that invertebrates are more sensitive to bromate dangers than fish and algae. The study highlights the importance of conducting large-scale laboratory tests on the effluents resulting from wastewater treatment units, including bromide levels, to prevent the formation of dangerous side compounds such as bromate, which may have negative effects on populations and may lead to the toxicity of trophic levels in ecosystems.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142378020","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}
引用次数: 0
Beach wracks microbiome and its putative function in plastic polluted Mediterranean marine ecosystem. 海滩礁石微生物群及其在受塑料污染的地中海海洋生态系统中的功能。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-25 DOI: 10.1016/j.marenvres.2024.106769
Anamarija Kolda, Maja Mucko, Ana Rapljenović, Zrinka Ljubešić, Kristina Pikelj, Željko Kwokal, Hana Fajković, Vlado Cuculić
{"title":"Beach wracks microbiome and its putative function in plastic polluted Mediterranean marine ecosystem.","authors":"Anamarija Kolda, Maja Mucko, Ana Rapljenović, Zrinka Ljubešić, Kristina Pikelj, Željko Kwokal, Hana Fajković, Vlado Cuculić","doi":"10.1016/j.marenvres.2024.106769","DOIUrl":"https://doi.org/10.1016/j.marenvres.2024.106769","url":null,"abstract":"<p><p>The coasts of the world's oceans and seas accumulate various types of floating debris, commonly known as beach wracks, including organic seaweeds, seagrass, and ubiquitous anthropogenic waste, mainly plastic. Beach wrack microbiome (MB), surviving in the form of a biofilm, ensures decomposition and remineralization of wracks, but can also serve as a vector of potential pathogens in the environment. Through the interdisciplinary approach and comprehensive sampling design that includes geological analysis of the sediment, plastic debris composition analysis (ATR-FTIR) and application of 16S rRNA gene metabarcoding of beach wrack MBs, this study aims to describe MB in relation to beach exposure, sediment type and plastic pollution. Major contributors in beach wrack MB were Proteobacteria, Bacteroidetes, Actinobacteria, Planctomycetes, Verrucomicrobia and Firmicutes and there was significant dissimilarity between sample groups with Vibrio, Cobetia and Planococcus shaping the Exposed beach sample group and Cyclobacteriaceae and Flavobacterium shaping the Sheltered beach sample group. Our results suggest plastisphere MB is mostly shaped by beach exposure, type of seagrass, sediment type and probably beach naturalness with heavy influence of seawater MB and shows no significant dissimilarity between MBs from a variety of microplastics (MP). Putative functional analysis of MB detected plastic degradation and potential human pathogen bacteria in both beach wrack and seawater MB. The research provides the next crucial step in beach wrack MP accumulation research, MB composition and functional investigation with focus on beach exposure as an important variable.</p>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381243","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}
引用次数: 0
Molecular diversity and seasonal dynamics of Ostreococcus (Mamiellophyceae, Chlorophyta) in typical mariculture bays based on metabarcoding analysis 基于代谢编码分析的典型海水养殖海湾 Ostreococcus(叶绿藻门)的分子多样性和季节动态变化
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-24 DOI: 10.1016/j.marenvres.2024.106764
{"title":"Molecular diversity and seasonal dynamics of Ostreococcus (Mamiellophyceae, Chlorophyta) in typical mariculture bays based on metabarcoding analysis","authors":"","doi":"10.1016/j.marenvres.2024.106764","DOIUrl":"10.1016/j.marenvres.2024.106764","url":null,"abstract":"<div><div><em>Ostreococcus</em> (Mamiellophyceae, Chlorophyta) is a cosmopolitan genus of marine pico-phytoplankton and the smallest free-living photosynthetic eukaryotes with cell size of 1–2 μm. To understand the diversity and spatio-temporal distribution of <em>Ostreococcus</em> in the Rongcheng coastal regions in northern China, metabarcoding analysis based on the 18S rDNA V4 molecular marker was applied to study the molecular diversity and seasonal dynamics of <em>Ostreococcus</em> in three typical mariculture bays (Rongcheng Bay, Lidao Bay and Sanggou Bay). A total of 103 amplicon sequence variants (ASVs) annotated as <em>Ostreococcus</em> were detected in these three typical mariculture bays throughout the year. The top five ASVs in terms of abundance were ASV4, ASV9, ASV14, ASV28 and ASV109, totally occupying 99.1% of <em>Ostreococcus</em> reads. Phylogenetic analysis showed that these five dominant ASVs represented two <em>Ostreococcus</em> ecotypes (OI and OII) and were grouped into four <em>Ostreococcus</em> clades including <em>Ostreococcus lucimarinus</em> (ASV9) and <em>Ostreococcus tauri</em> (ASV28 and ASV109) in OI, and <em>Ostreococcus</em> sp. RC1 (ASV4) and <em>Ostreococcus</em> sp. RC2 (ASV14) in <span>OII</span>, which provided direct evidence to support the co-existence of two ecotypes in the Rongcheng coastal regions. Five dominant ASVs in OI and OII exhibited two distinct seasonal distribution patterns. Three dominant ASVs (ASV9, ASV28 and ASV109) in OI could be detected in all four seasons of the year, exhibiting native distribution properties, while two ASVs (ASV4 and ASV14) in OII decreased sharply in winter and could not be detected in spring, exhibiting characteristics of alien inputs. The composition, succession and association of <em>Ostreococcus</em> community were mainly driven by water temperature in these mariculture bays. This study helps us systematically understand the molecular diversity and distribution patterns of <em>Ostreococcus</em> in typical mariculture bays in northern China, laying the foundation for understanding and revealing the ecological functions of pico-phytoplankton.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322807","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}
引用次数: 0
Evaluating fish foraging behaviour on non-indigenous Asparagopsis taxiformis using a remote video foraging system 利用远程视频觅食系统评估鱼类在非土著蓑鲉上的觅食行为
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-24 DOI: 10.1016/j.marenvres.2024.106766
{"title":"Evaluating fish foraging behaviour on non-indigenous Asparagopsis taxiformis using a remote video foraging system","authors":"","doi":"10.1016/j.marenvres.2024.106766","DOIUrl":"10.1016/j.marenvres.2024.106766","url":null,"abstract":"<div><div>The proliferation of pest and invasive marine macroalgae threatens coastal ecosystems, with biotic interactions, including direct effects such as grazing and indirect effects such as the trophic cascades, where one species indirectly affects another through its interactions with a third species, play a critical role in determining the resistance of local communities to these invasions. This study examines the foraging behaviour and preference of native fish communities toward native (<em>Halopteris scoparia</em>, <em>Sargassum vulgare</em>) and non-indigenous (<em>Asparagopsis taxiformis</em>) macroalgae using the Remote Video Foraging System (RVFS). Fifty-four weedpops were deployed across three locations to present these macroalgae, while associated epifaunal assemblages were also collected. Video analysis revealed that four common fish species displayed preference towards native macroalgae, possibly due to by the presence of zoobenthos rather than herbivory. This observation suggests that these fish species identified the macroalgae as a habitat that harboured their preferred food items. In contrast, <em>A. taxiformis</em> was consistently avoided, suggesting limited integration into the local food web. Site-specific variations in fish-macroalgae interactions and epifaunal diversity highlighted the complexity of these dynamics. This study contributes to understanding of the ecological implications of invasive macroalgae and supports the use of RVFS as a tool for assessing local biotic resistance against non-indigenous species in coastal ecosystems globally.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359189","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}
引用次数: 0
Impact of Alaska atmospheric blocking on the carbon flux in the Northeast Pacific Ocean 阿拉斯加大气阻塞对东北太平洋碳通量的影响。
IF 3 3区 环境科学与生态学
Marine environmental research Pub Date : 2024-09-24 DOI: 10.1016/j.marenvres.2024.106770
{"title":"Impact of Alaska atmospheric blocking on the carbon flux in the Northeast Pacific Ocean","authors":"","doi":"10.1016/j.marenvres.2024.106770","DOIUrl":"10.1016/j.marenvres.2024.106770","url":null,"abstract":"<div><div>The Northeast Pacific Ocean (NEP) is one of the important carbon sinks in the global ocean. The causes of carbon flux changes in this region have been widely studied, but the physical processes associated with large scale climate variability remain controversial primarily due to scarcity of spatially and temporally continuous observations. In this study, we constructed a high-resolution sea surface partial pressure of CO<sub>2</sub> (<em>p</em>CO<sub>2</sub>) from satellite observations for the NEP from 2003 to 2020 using the machine learning based XGBoost model. By analyzing the interannual large-scale high-latitude atmospheric dynamics and ocean physical conditions over the NEP, we find that the CO<sub>2</sub> flux density (FCO<sub>2</sub>) anomalies have a strong correlation with the Alaskan atmospheric blocking events. In the region north of 48°N, anomalous cyclones triggered by atmospheric blocking increased sea surface height (SSH), which reduced the replenishment of dissolved inorganic carbon (DIC) from deep seawater, leading to enhanced carbon uptake. By contrast, in the region south of 48°N, the increase in sea surface temperature (SST) triggered by atmospheric blocking reduced the solubility of CO<sub>2</sub> in seawater, resulting in a decrease in regional carbon flux. These results provide new perspectives for better understanding and predicting the effects of high-latitude atmospheric dynamics on regional ocean carbon fluxes.</div></div>","PeriodicalId":18204,"journal":{"name":"Marine environmental research","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142349518","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}
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