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Marine Environmental Research

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https://www.readbyqxmd.com/read/28208067/low-ph-conditions-impair-module-capacity-to-regenerate-in-a-calcified-colonial-invertebrate-the-bryozoan-cryptosula-pallasiana
#1
Chiara Lombardi, Paul D Taylor, Silvia Cocito, Camilla Bertolini, Piero Calosi
Many aquatic animals grow into colonies of repeated, genetically identical, modules (zooids). Zooid interconnections enable colonies to behave as integrated functional units, while plastic responses to environmental changes may affect individual zooids. Plasticity includes the variable partitioning of resources to sexual reproduction, colony growth and maintenance. Maintenance often involves regeneration, which is also a routine part of the life history in some organisms, such as bryozoans. Here we investigate changes in regenerative capacity in the encrusting bryozoan Cryptosula pallasiana when cultured at different seawater pCO2 levels...
February 7, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28189875/spatial-distribution-of-the-culturable-bacterial-community-associated-with-the-invasive-alga-caulerpa-cylindracea-in-the-mediterranean-sea
#2
Loredana Stabili, Lucia Rizzo, Graziano Pizzolante, Pietro Alifano, Simonetta Fraschetti
Understanding the mechanisms underlying the complex seaweed-bacteria associations in nature may provide information on the fitness of an invasive host. This may require the use of different approaches. In this study, we employed, for the first time, the Biolog system-Ecoplates™ to analyze the functional diversity of the culturable fraction of the bacterial assemblages associated with the surface of Caulerpa cylindracea, the invasive seaweed of the Mediterranean Sea. Seaweed samples were collected at five sites across the basin...
February 3, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28188988/ocean-acidification-adversely-influences-metabolism-extracellular-ph-and-calcification-of-an-economically-important-marine-bivalve-tegillarca-granosa
#3
Xinguo Zhao, Wei Shi, Yu Han, Saixi Liu, Cheng Guo, Wandong Fu, Xueliang Chai, Guangxu Liu
Oceanic uptake of CO2 from the atmosphere has significantly reduced surface seawater pH and altered the carbonate chemistry within, leading to global Ocean Acidification (OA). The blood clam, Tegillarca granosa, is an economically and ecologically significant marine bivalve that is widely distributed along the coastal and estuarine areas of Asia. To investigate the physiological responses to OA, blood clams were exposed to ambient and three reduced seawater pH levels (8.1, 7.8, 7.6 and 7.4) for 40 days, respectively...
February 1, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28196337/are-seaward-pneumatophore-fringes-transitional-between-mangrove-and-lower-shore-system-compartments
#4
R S K Barnes
Work in temperate New Zealand has concluded that seaward fringes of Avicennia pneumatophores (P) form an 'important ecological transitional environment' between seagrass (Z) and mangrove (M), supporting intermediate macrofaunal numbers and biodiversity (Alfaro, 2006). This study re-examined that hypothesis in subtropical Moreton Bay, Queensland, and investigated its dependence on the nature of the lower-shore habitat; i.e. whether seagrass or sandflat (S). Adjacent macrobenthic assemblages across 45 m deep Z:P:M and S:P:M interfaces were compared uni- and multivariately and via various assemblage metrics...
January 31, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28187325/assessing-larval-connectivity-for-marine-spatial-planning-in-the-adriatic
#5
L Bray, D Kassis, J M Hall-Spencer
There are plans to start building offshore marine renewable energy devices throughout the Mediterranean and the Adriatic has been identified as a key location for wind farm developments. The development of offshore wind farms in the area would provide hard substrata for the settlement of sessile benthos. Since the seafloor of the Adriatic is predominantly sedimentary this may alter the larval connectivity of benthic populations in the region. Here, we simulated the release of larvae from benthic populations along the coasts of the Adriatic Sea using coupled bio-physical models and investigated the effect of pelagic larval duration on dispersal...
January 25, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28187324/differential-impacts-of-global-change-variables-on-coastal-south-atlantic-phytoplankton-role-of-seasonal-variations
#6
Marco J Cabrerizo, Presentación Carrillo, Virginia E Villafañe, E Walter Helbling
Global change is associated to the increase in temperature (T), nutrient inputs (Nut) and solar radiation in the water column. To address their joint impact on the net community production [NCP], respiration [CR] and PSII performance (ΦPSII) of coastal phytoplankton communities from the South Atlantic Ocean over a seasonal succession, we performed a factorial design. For this, we used a 2 × 2 × 2 matrix set-up, with and without UVR, ambient and enriched nutrients, and in situ T and in situ T + 3 °C...
January 24, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28214628/differences-in-biological-traits-composition-of-benthic-assemblages-between-unimpacted-habitats
#7
S G Bolam, C Garcia, J Eggleton, A J Kenny, L Buhl-Mortensen, G Gonzalez-Mirelis, T van Kooten, G Dinesen, J Hansen, J G Hiddink, M Sciberras, C Smith, N Papadopoulou, A Gumus, G Van Hoey, O R Eigaard, F Bastardie, A D Rijnsdorp
There is an implicit requirement under contemporary policy drivers to understand the characteristics of benthic communities under anthropogenically-unimpacted scenarios. We used a trait-based approach on a large dataset from across the European shelf to determine how functional characteristics of unimpacted benthic assemblages vary between different sedimentary habitats. Assemblages in deep, muddy environments unaffected by anthropogenic disturbance show increased proportions of downward conveyors and surface deposit-feeders, while burrowing, diffusive mixing, scavenging and predation traits assume greater numerical proportions in shallower habitats...
January 23, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28167386/dna-adducts-in-marine-fish-as-biological-marker-of-genotoxicity-in-environmental-monitoring-the-way-forward
#8
REVIEW
Daniela M Pampanin, Steven J Brooks, Bjørn Einar Grøsvik, Jérémie Le Goff, Sonnich Meier, Magne O Sydnes
DNA adducts in fish represent a very important genotoxicity endpoint in environmental monitoring, being a pre-mutagenic lesion that plays an essential role in the initiation of carcinogenesis. The analysis of DNA adducts is a challenging task due to the low concentration of the analyte. Methods are available to determine the presence of DNA adducts, although further knowledge is required to fully understand the nature of the adducts and responsible xenobiotics (i.e. position of adduct in DNA, most active xenobiotic and metabolite forms, structural information)...
January 21, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28103523/anthropogenic-chemical-cues-can-alter-the-swimming-behaviour-of-juvenile-stages-of-a-temperate-fish
#9
Carlos Díaz-Gil, Lucy Cotgrove, Sarah Louise Smee, David Simón-Otegui, Hilmar Hinz, Amalia Grau, Miquel Palmer, Ignacio A Catalán
Human pressure on coastal areas is affecting essential ecosystems including fish nursery habitats. Among these anthropogenic uses, the seasonal increment in the pressure due to leisure activities such as coastal tourism and yachting is an important environmental stressor in many coastal zones. These pressures may elicit understudied impacts due to, for example, sunscreens or other seasonal pollutants. The island of Majorca, northwest Mediterranean Sea, experiences one of the highest number of tourist visits per capita in the world, thus the surrounding coastal habitat is subject to high anthropogenic seasonal stress...
January 6, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28088495/interaction-strength-between-different-grazers-and-macroalgae-mediated-by-ocean-acidification-over-warming-gradients
#10
E Sampaio, I F Rodil, F Vaz-Pinto, A Fernández, F Arenas
Since the past century, rising CO2 levels have led to global changes (ocean warming and acidification) with subsequent effects on marine ecosystems and organisms. Macroalgae-herbivore interactions have a main role in the regulation of marine community structure (top-down control). Gradients of warming prompt complex non-linear effects on organism metabolism, cascading into altered trophic interactions and community dynamics. However, not much is known on how will acidification and grazer assemblage composition shape these effects...
January 6, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28041674/ii-species-sensitivity-distributions-based-on-biomarkers-and-whole-organism-responses-for-integrated-impact-and-risk-assessment-criteria
#11
Steinar Sanni, Emily Lyng, Daniela M Pampanin, Mathijs G D Smit
The aim of this paper is to bridge gaps between biomarker and whole organism responses related to oil based offshore discharges. These biomarker bridges will facilitate acceptance criteria for biomarker data linked to environmental risk assessment and translate biomarker results to higher order effects. Biomarker based species sensitivity distributions (SSDbiomarkers) have been constructed for relevant groups of biomarkers based on laboratory data from oil exposures. SSD curves express the fraction of species responding to different types of biomarkers...
December 26, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/28038790/iii-use-of-biomarkers-as-risk-indicators-in-environmental-risk-assessment-of-oil-based-discharges-offshore
#12
Steinar Sanni, Emily Lyng, Daniela M Pampanin
Offshore oil and gas activities are required not to cause adverse environmental effects, and risk based management has been established to meet environmental standards. In some risk assessment schemes, Risk Indicators (RIs) are parameters to monitor the development of risk affecting factors. RIs have not yet been established in the Environmental Risk Assessment procedures for management of oil based discharges offshore. This paper evaluates the usefulness of biomarkers as RIs, based on their properties, existing laboratory biomarker data and assessment methods...
December 20, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/28038348/i-biomarker-quantification-in-fish-exposed-to-crude-oil-as-input-to-species-sensitivity-distributions-and-threshold-values-for-environmental-monitoring
#13
Steinar Sanni, Carina Björkblom, Henrik Jonsson, Brit F Godal, Birgitta Liewenborg, Emily Lyng, Daniela M Pampanin
The aim of this study was to determine a suitable set of biomarker based methods for environmental monitoring in sub-arctic and temperate offshore areas using scientific knowledge on the sensitivity of fish species to dispersed crude oil. Threshold values for environmental monitoring and risk assessment were obtained based on a quantitative comparison of biomarker responses. Turbot, halibut, salmon and sprat were exposed for up to 8 weeks to five different sub-lethal concentrations of dispersed crude oil. Biomarkers assessing PAH metabolites, oxidative stress, detoxification system I activity, genotoxicity, immunotoxicity, endocrine disruption, general cellular stress and histological changes were measured...
December 20, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/28038347/identifying-ecological-barriers-in-marine-environment-the-case-study-of-dasyatis-marianae
#14
Tiego L A Costa, M Grazia Pennino, Liana F Mendes
Ecological barriers are important determinants of the evolution and distributions marine organisms, and a challenge for evolutionary ecologists seeking to understand population structure in the sea. Dasyatis marianae is an endemic Brazilian species that indicates certain restrictions on its distribution probably due to marine barriers. In this study, Bayesian hierarchical spatial models, jointly with environmental and occurrence species data, are used to identify, which elements could generate these barriers on Dasyatis marianae distribution...
December 19, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/28126512/short-term-elevated-co2-exposure-stimulated-photochemical-performance-of-a-coastal-marine-diatom
#15
Yaping Wu, Douglas A Campbell, Kunshan Gao
Ocean acidification changes seawater chemistry, with increased CO2 and decreased pH regarded as the most important factors that impact marine organisms. This study employed an unconventional methodology to distinguish the independent effects of pH versus CO2. Changes in CO2 dominated the photochemical responses of the coastal diatom Phaeodactylum tricornutum to short-term ocean acidification. Increased CO2 lowered non-photochemical quenching of excitation and stimulated the electron transport rates of photosynthesis, with the largest effects on both parameters when CO2 and pH were altered simultaneously...
December 14, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/28024530/editorial
#16
EDITORIAL
Ketil Hylland, Matthew Gubbins
No abstract text is available yet for this article.
March 2017: 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
#17
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...
March 2017: 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
#18
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...
March 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/27262398/integrated-chemical-and-biological-assessment-of-contaminant-impacts-in-selected-european-coastal-and-offshore-marine-areas
#19
Ketil Hylland, Craig D Robinson, Thierry Burgeot, Concepción Martínez-Gómez, Thomas Lang, Jörundur Svavarsson, John E Thain, A Dick Vethaak, Mattew J Gubbins
This paper reports a full assessment of results from ICON, an international workshop on marine integrated contaminant monitoring, encompassing different matrices (sediment, fish, mussels, gastropods), areas (Iceland, North Sea, Baltic, Wadden Sea, Seine estuary and the western Mediterranean) and endpoints (chemical analyses, biological effects). ICON has demonstrated the use of a framework for integrated contaminant assessment on European coastal and offshore areas. The assessment showed that chemical contamination did not always correspond with biological effects, indicating that both are required...
March 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/27157536/assessing-environmental-quality-status-by-integrating-chemical-and-biological-effect-data-the-cartagena-coastal-zone-as-a-case
#20
Concepción Martínez-Gómez, Beatriz Fernández, Craig D Robinson, J Antonio Campillo, Víctor M León, José Benedicto, Ketil Hylland, A Dick Vethaak
Cartagena coastal zone (W Mediterranean) was chosen for a practical case study to investigate the suitability of an integrated indicator framework for marine monitoring and assessment of chemicals and their effects, which was developed by ICES and OSPAR. Red mullet (Mullus barbatus) and the Mediterranean mussel (Mytilus galloprovincialis) were selected as target species. Concentrations of contaminants in sediment and biota, and contaminant-related biomarkers were analysed. To assess environmental quality in the Cartagena coastal zone with respect to chemical pollution, data were assessed using available assessment criteria, and then integrated for different environmental matrices...
March 2017: Marine Environmental Research
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