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Marine Environmental Research

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https://www.readbyqxmd.com/read/27912074/macrobenthos-and-megabenthos-responses-to-long-term-large-scale-hypoxia-on-the-louisiana-continental-shelf
#1
Kevin B Briggs, J Kevin Craig, S Shivarudrappa, T M Richards
The macrobenthos and megabenthos responses to long-term, recurring hypoxia on the Louisiana continental shelf were compared at four locations with different historical (2000-2010) episodes of annual exposure to bottom-water hypoxia. Measurements of abundance, biomass, species diversity, and community composition of the two size classes of benthos suggested that the macrobenthic response is driven chiefly by tolerance to hypoxia, whereas the megabenthic response was affected by the ability to migrate and the availability/unavailability of macrobenthos prey at the sediment surface...
November 23, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27846413/regional-variation-in-bycatches-associated-with-king-scallop-pecten-maximus-l-dredge-fisheries
#2
Claire L Szostek, Lee G Murray, Ewen Bell, Gwladys Lambert, Michel J Kaiser
The biomass and composition of bycatch from king scallop dredge fisheries was assessed and compared between the English Channel, Cardigan Bay in Wales and around the Isle of Man. Bycatch composition varied significantly at localised, and broad, geographic scales. The mean proportion of scallop dredge bycatch biomass in the English Channel was 19% of total catch biomass. The proportion of bycatch was lower in Cardigan Bay (15%) but notably higher around the Isle of Man (53%). The proportion of individual bycatch species in dredge catches were low, therefore scallop dredging is unlikely to cause a substantial increase the population mortality of individual commercially fished species beyond that caused by the target fisheries for those species, or bycatches of other fisheries...
November 10, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27846414/hepatic-gene-transcription-profiles-in-turbot-scophthalmus-maximus-experimentally-exposed-to-heavy-fuel-oil-n%C3%A2%C2%BA-6-and-to-styrene
#3
Oihane Diaz de Cerio, Eider Bilbao, Pamela Ruiz, Belén G Pardo, Paulino Martínez, Miren P Cajaraville, Ibon Cancio
Oil and chemical spills in the marine environment, although sporadic, are highly dangerous to biota inhabiting coastal and estuarine areas. Effects of spilled compounds in exposed organisms occur at different biological organization levels: from molecular, cellular or tissue levels to the physiological one. The present study aims to determine the specific hepatic gene transcription profiles observed in turbot juveniles under exposure to fuel oil n °6 and styrene vs controls using an immune enriched turbot (Scophthalmus maximus) oligo-microarray containing 2716 specific gene probes...
November 9, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27836186/polybrominated-diphenyl-ethers-pbdes-and-their-hydroxylated-and-methoxylated-analogues-in-the-blood-of-harbor-dall-s-and-finless-porpoises-from-the-japanese-coastal-waters
#4
Mari Ochiai, Kei Nomiyama, Tomohiko Isobe, Tadasu K Yamada, Yuko Tajima, Ayaka Matsuda, Akira Shiozaki, Takashi Matsuishi, Masao Amano, Hisato Iwata, Shinsuke Tanabe
This study investigated the accumulation of polybrominated diphenyl ethers (PBDEs) and their hydroxylated and methoxylated analogues (OH-PBDEs and MeO-PBDEs) in the blood of harbor porpoises, Dall's porpoises, and finless porpoises stranded or bycaught in Japanese coastal waters and in the North Pacific Ocean. Moreover, we suggested the origins of these contaminants and the factors affecting their pattern of accumulation. Levels of PBDEs in Dall's porpoises were one order of magnitude greater than those in the other species...
November 5, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27855314/alterations-of-gene-expression-indicating-effects-on-estrogen-signaling-and-lipid-homeostasis-in-seabream-hepatocytes-exposed-to-extracts-of-seawater-sampled-from-a-coastal-area-of-the-central-adriatic-sea-italy
#5
Paolo Cocci, Martina Capriotti, Gilberto Mosconi, Alessandra Campanelli, Emanuela Frapiccini, Mauro Marini, Giovanni Caprioli, Gianni Sagratini, Graziano Aretusi, Francesco Alessandro Palermo
Recent evidences suggest that the toxicological effects of endocrine disrupting chemicals (EDCs) involve multiple nuclear receptor-mediated pathways, including estrogen receptor (ER) and peroxisome proliferator-activated receptor (PPAR) signaling systems. Thus, our objective in this study was to detect the summated endocrine effects of EDCs with metabolic activity in coastal waters of the central Adriatic Sea by means of a toxicogenomic approach using seabream hepatocytes. Gene expression patterns were also correlated with seawater levels of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs)...
November 2, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27839718/integrated-monitoring-of-chemicals-and-their-effects-on-four-sentinel-species-limanda-limanda-platichthys-flesus-nucella-lapillus-and-mytilus-sp-in-seine-bay-a-key-step-towards-applying-biological-effects-to-monitoring
#6
Thierry Burgeot, Farida Akcha, Dominique Ménard, Craig Robinson, Véronique Loizeau, Christophe Brach-Papa, Concepción Martínez-Gòmez, Jérémie Le Goff, Hélène Budzinski, Karine Le Menach, Jérome Cachot, Christophe Minier, Katja Broeg, Ketil Hylland
The International workshop on Integrated Assessment of CONtaminants impacts on the North sea (ICON) provided a framework to validate the application of chemical and biological assessment thresholds (BACs and EACs) in the Seine Bay in France. Bioassays (oyster larval anomalies, Corophium arenarium toxicity assay and DR Calux) for sediment and biomarkers: ethoxyresorufin-O-deethylase (EROD) activity, acetylcholinesterase (AChE) activity, lysosomal membrane stability (LMS), DNA strand breaks using the Comet assay, DNA adducts, micronucleus (MN), PAH metabolites, imposex, intersex and fish external pathologies were analysed in four marine sentinel species (Platichthys flesus, Limanda limanda, Mytilus sp...
November 2, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27887733/determining-oxidative-stress-and-erod-activity-in-dab-limanda-limanda-in-the-north-and-baltic-seas
#7
Sturve Joachim, Hultman T Maria, Wassmur Britt, Carney Almroth Bethanie
The North and Baltic Seas are heavily trafficked marine areas with extensive anthropogenic activities, including cargo and fishing vessels, waste dumping, oil platforms, industrial activities and contamination from coastal runoff. In order to evaluate the environmental health of these regions, we used the demersal fish dab (Limanda limanda) as a sentinel species. The current study used well-established biomarkers for PAH exposure and oxidative stress, measuring EROD activity, the acute antioxidant response as well as oxidation of proteins detected as protein carbonyl levels...
November 1, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27836189/near-edge-wrack-effects-on-bare-sediments-small-scale-variation-matters-in-the-monitoring-of-sandy-beaches
#8
Mitchell R MacMillan, Paula Tummon Flynn, Cristian Duarte, Pedro A Quijón
The influence of wrack on sandy beach communities is well-documented but its effect on bare sediments located immediately beyond its edge has not yet been tested. This study aimed to explore these effects by surveying bare sediments located at increasing distances (0.5-2 m) from the wrack in five sandy beaches on Prince Edward Island, Atlantic Canada. In addition, we tested the influence of wrack with a field manipulation using wrack patches made up of rockweed bundles. The survey indicated that a modest but significant number of amphipods and beetles occupied bare sediments located 0...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27836188/grey-mullet-mugilidae-as-possible-indicators-of-global-warming-in-south-african-estuaries-and-coastal-waters
#9
Nicola C James, Alan K Whitfield, Trevor D Harrison
The grey mullet usually occur in large numbers and biomass in the estuaries of all three South African biogeographic regions, thus making it an ideal family to use in terms of possibly acting as an environmental indicator of global warming. In this analysis the relative estuarine abundance of the dominant three groups of mugilids, namely tropical, warm-water and cool-water endemics, were related to sea surface coastal temperatures. The study suggests a strong link between temperature and the distribution and abundance of the three mullet groups within estuaries and indicates the potential of this family to act as an indicator for future climate change within these systems and adjacent coastal waters...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27836187/changes-in-the-fish-assemblages-of-a-coastal-lagoon-subjected-to-gradual-salinity-increases
#10
Eva García-Seoane, Marina Dolbeth, Cátia L Silva, Ana Abreu, José E Rebelo
This study analyses fish data to understand how the gradual increase of salinity registered in a coastal lagoon and consequently, anthropogenic disturbance, affected the fish communities. For that, fish assemblages of the Ria de Aveiro were sampled monthly in 3 years from different decades (1988, 1997 and 2012). Dominant species were Atherina boyeri, A. presbyter, Sardina pilchardus, Dicentrarchus labrax, Liza aurata and L. ramada. Significant differences in fish communities were detected among years in both terms of density and biomass...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27829510/effects-of-novobiocin-and-methotrexate-on-the-benthic-amphipod-ampelisca-brevicornis-exposed-to-spiked-sediments
#11
Lucas Buruaem Moreira, Luciane Alves Maranho, Rosa María Baena-Nogueras, Pablo Antonio Lara-Martín, Maria Laura Martín-Díaz
The marine amphipod Ampelisca brevicornis was used as model organism of benthic macrofauna to assess the possible adverse effects of pharmaceuticals bound to sediments. Organisms were exposed to sediment spiked with novobiocin (NOV) and methotrexate (MTX) for 10 days in order to estimate the acute toxicity (lethal effects) produced by the two compounds. The surviving organisms were pooled and analyzed to determine their sublethal responses associated with different phases of metabolism (enzyme activities in phases I and II), oxidative stress (antioxidant enzyme activities and lipid peroxidation), and genotoxicity (DNA damage in the form of strand breaks)...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27825680/spatial-homogeneity-of-benthic-macrofaunal-biodiversity-across-small-spatial-scales
#12
R S K Barnes
Spatial heterogeneity of biodiversity has been extensively researched, but its spatial homogeneity is virtually unstudied. An intertidal seagrass system at Knysna (South Africa) known to display spatially homogeneous macrobenthic species density at scales ≥0.0275 m(2) was re-investigated at four smaller spatial grains (0.0015 m(2) - 0.0095 m(2)) via a lattice of 8 × 8 stations within a 0.2 ha area. The aim was to investigate the null hypothesis that spatial homogeneity of species density is not a fixed emergent assemblage property but breaks down at small spatial grains within given spatial extents...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27816195/co2-leakage-from-carbon-dioxide-capture-and-storage-ccs-systems-affects-organic-matter-cycling-in-surface-marine-sediments
#13
Eugenio Rastelli, Cinzia Corinaldesi, Antonio Dell'Anno, Teresa Amaro, Silvestro Greco, Marco Lo Martire, Laura Carugati, Ana M Queirós, Stephen Widdicombe, Roberto Danovaro
Carbon dioxide capture and storage (CCS), involving the injection of CO2 into the sub-seabed, is being promoted worldwide as a feasible option for reducing the anthropogenic CO2 emissions into the atmosphere. However, the effects on the marine ecosystems of potential CO2 leakages originating from these storage sites have only recently received scientific attention, and little information is available on the possible impacts of the resulting CO2-enriched seawater plumes on the surrounding benthic ecosystem. In the present study, we conducted a 20-weeks mesocosm experiment exposing coastal sediments to CO2-enriched seawater (at 5000 or 20,000 ppm), to test the effects on the microbial enzymatic activities responsible for the decomposition and turnover of the sedimentary organic matter in surface sediments down to 15 cm depth...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27810225/effects-of-the-2015-heat-wave-on-benthic-invertebrates-in%C3%A2-the%C3%A2-tabarca%C3%A2-marine-protected-area-southeast-spain
#14
Esther Rubio-Portillo, Andrés Izquierdo-Muñoz, Juan F Gago, Ramon Rosselló-Mora, Josefa Antón, Alfonso A Ramos-Esplá
In the late summer of 2015, extensive mortality of scleratinian corals, gorgonians, and sponges was observed in the Marine Protected Area of Tabarca (southeast Spain). Quantitative data indicated that at 25 m depth the sea fan Eunicella singularis was the most affected species (50% of colonies affected by partial mortality); while in shallow waters more than 40% of the endemic scleractinian coral Cladocora caespitosa population showed tissue lesions that affected more than 10% of their surfaces. Other affected species were the scleractinian corals Oculina patagonica and Phyllangia mouchezii, the sea fan Leptogorgia sarmentosa and the sponge Sarcotragus fasciculatus...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27769527/spatial-variability-of-soft-bottom-macrobenthic-communities-in-northern-sicily-western-mediterranean-contrasting-trawled-vs-untrawled-areas
#15
C Romano, E Fanelli, G D'Anna, C Pipitone, S Vizzini, A Mazzola, F Badalamenti
This study examines the impact of bottom trawl fishing on the macrobenthic communities inhabiting the coastal terrigenous mud off the northern coast of Sicily (Western Mediterranean). Two intensely trawled gulfs were compared with two gulfs from which trawling has been excluded for 15 years. The results show a significant effect of trawling on the faunal assemblage and when comparing the mean biomass and the whole isotopic composition of the benthic communities. A similar pattern, although not significant, was found for total abundance, biomass, production/biomass ratio and diversity...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27742449/16s-rrna-gene-profiling-of-planktonic-and-biofilm-microbial-populations-in-the-gulf-of-guinea-using-illumina-ngs
#16
Sukriye Celikkol-Aydin, Christine C Gaylarde, Tim Lee, Robert E Melchers, Devin L Witt, Iwona B Beech
16S rRNA gene profiling using a pipeline involving the Greengenes database revealed that bacterial populations in innermost (proximal to the steel surface) and outer regions of biofilms on carbon steel exposed 3 m below the surface at an offshore site in the Gulf of Guinea differed from one another and from seawater. There was a preponderance of gammaproteobacterial sequences, representing organisms known for hydrocarbon degradation. Total DNA from the innermost layer was 1500 times that recovered from the outermost...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27742448/application-of-a-weight-of-evidence-approach-utilising-biological-effects-histopathology-and-contaminant-levels-to-assess-the-health-and-pollution-status-of-irish-blue-mussels-mytilus-edulis
#17
Michelle Giltrap, Jenny Ronan, Colby Tanner, Francis X O'Beirn, Brett P Lyons, Rónán Mag Aoidh, Heather Rochford, Brendan McHugh, Evin McGovern, James Wilson
A weight of evidence (WOE) approach, integrating biological effects, mussel histopathology and tissue contaminant levels is proposed to evaluate mussel health and pollution status. Contaminant levels, histopathology and several biological effects (BEs) including Lysosomal membrane stability (LMS), acetylcholinesterase (AChe), metallothionein proteins (MT) and alkali labile phosphate (ALP), in Mytilus edulis are presented, improving the current knowledge base for these data. Potential links between histopathology, BEs and contaminants and ranking of sites are investigated with an integrated response (IR) indexing technique...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27742447/sewage-input-reduces-the-consumption-of-rhizophora-mangle-propagules-by-crabs-in-a-subtropical-mangrove-system
#18
Frederike Ricarda Boehm, Leonardo Sandrini-Neto, Tom Moens, Paulo da Cunha Lana
Mangrove forests are highly productive and play a major role in global carbon cycling. Their carbon accumulation can be influenced through the consumption of nutrient-poor leaves and propagules by herbivore crabs. Anthropogenic nutrient input from sewage contamination is widespread in these often naturally nutrient-limited ecosystems. We hypothesised that sewage-mediated nutrient input to mangrove stands of Paranaguá Bay (southern Brazil), would alter the nutrient sources available for crabs, e.g. through microphytobenthos increase, and that this would reflect in their feeding behaviour...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27720528/distinct-community-dynamics-at-two-artificial-habitats-in-a-recreational-marina
#19
Felipe T Oricchio, Gabriela Pastro, Edson A Vieira, Augusto A V Flores, Fernando Z Gibran, Gustavo M Dias
Man-made facilities along coastlines modify water circulation and sedimentation dynamics which can affect the structure of marine benthic and pelagic communities. To test how environmental heterogeneity associated with a recreational marina affects the structure of the fouling community and the benthic-pelagic link, we conducted an experiment in which predation effects on recruitment and community structure were assessed in two artificial habitats: inside the marina, an area of calm waters and often disturbed by boating activity, and the breakwater, a more hydrodynamic area...
December 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27720527/climate-influence-on-juvenile-european-sea-bass-dicentrarchus-labrax-l-populations-in-an-estuarine-nursery-a-decadal-overview
#20
Eduardo G Bento, Tiago F Grilo, Dániel Nyitrai, Marina Dolbeth, Miguel Ângelo Pardal, Filipe Martinho
Estuarine systems support the life cycle stages of commercially important marine fish and are influenced by large and local-scale climatic patterns. In this study, performed in the Mondego estuary, Portugal, we used an 11-year database (2003-2013) for analyzing the variability in the population of a marine juvenile migrant fish, the European sea bass Dicentrarchus labrax, regarding changes in abundance, population structure, growth rates, secondary production and annual day of peak abundance. Higher densities and production occurred in 2003, but no differences in 0-group growth could be observed...
December 2016: Marine Environmental Research
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