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Marine Environmental Research

F Nasi, M C Nordström, E Bonsdorff, R Auriemma, T Cibic, P Del Negro
Biological Traits Analysis (BTA) was used to identify functional features of infaunal polychaete assemblages associated with contamination in two Italian coastal areas: the harbour of Trieste (Adriatic Sea) and the Mar Piccolo of Taranto (Ionian Sea). The analysis was performed on 103 taxa, collected at four stations in each area. The two areas differed in species composition. The low diversity and the presence of stress-tolerant species in more polluted sites were not reflected in functional diversity, due to species contributing little to community functions or being functionally redundant...
March 9, 2018: Marine Environmental Research
Valentina Pitacco, Michele Mistri, Cristina Munari
A time series data of macrobenthic invertebrates of Valli di Comacchio lagoon (northern Adriatic) from 1996 to 2015, was analysed using Biological Traits Analysis, structural indices, AMBI and M-AMBI indices, with a twofold aim to: firstly, test the resilience of the system, and, secondly, test the influence of climate changes, in terms of temperature and precipitation pattern, on macrobenthic dynamics. Along the studied period macrobenthic community showed marked fluctuations, in terms of richness, diversity, biological traits and ecological groups, which could be related with environmental instability of the lagoon...
February 27, 2018: Marine Environmental Research
Manon Mercader, Mary Rider, Adrien Cheminée, Jérémy Pastor, Audrey Zawadzki, Alexandre Mercière, Romain Crec'hriou, Marion Verdoit-Jarraya, Philippe Lenfant
Along the littoral, a growing number of anthropogenic structures have caused substantial habitat destruction. Despite their detrimental impact, these constructions could play a role in the functioning of coastal ecosystems. The objective of this work was to assess the distribution of juvenile coastal fish along a seascape composed of various natural and artificial habitats in order to determine the potential role of coastal infrastructures as juvenile habitat. We surveyed juvenile populations on various infrastructures and natural sites along a 100 km shoreline of the French Mediterranean coast...
February 27, 2018: Marine Environmental Research
Thomas Shepherd, Inneke Rumengan, Ali Sahami
The post-depositional geochemical behaviour of mercury and arsenic in submarine mine tailings from the Mesel Gold Mine in Buyat Bay, North Sulawesi, Indonesia was assessed by in situ sampling of tailings porewaters using dialysis arrays and seawater and fish monitoring. Under steady-state conditions one year after cessation of tailings discharge, the calculated arsenic efflux incrementally added 0.8 μg/L of arsenic to the overlying seawater. The mercury efflux across the tailings-seawater interface was negligible...
February 26, 2018: Marine Environmental Research
Xizhi Huang, Zekang Liu, Zhe Xie, Sam Dupont, Wei Huang, Fangli Wu, Hui Kong, Liping Liu, Yanming Sui, Daohui Lin, Weiqun Lu, Menghong Hu, Youji Wang
Biochemical responses of the mussel Mytilus coruscus exposed to different concentrations of titanium dioxide nanoparticles (nano-TiO2 ) (0, 2.5, 10 mg L-1 ) and two pH levels (pH 8.1 and pH 7.3) for 14 days. Mussel responses were also investigated after a 7 days recovery period (pH 8.1 and no nanoparticle). Exposure to nano-TiO2 led changes in antioxidant indexes (superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione (GSH)), biotransformation enzyme activity (GST) and malondialdehyde level (MDA) in gills and digestive glands...
February 26, 2018: Marine Environmental Research
Élise Lacoste, Adeline Piot, Philippe Archambault, Christopher W McKindsey, Christian Nozais
Given concerns of increasing rates of species extinctions, the relationship between biodiversity and ecosystem functioning has become a major research focus over the past two decades. Many studies have shown that biodiversity per se (e.g. species richness) or species-specific traits may be good predictors of changes in ecosystem function. Although numerous studies on this subject have focused on terrestrial systems, few have evaluated benthic marine systems. We used the Limecola balthica community as a model to test whether the number or identity of three well-studied macrofaunal species influence the sediment bacterial compartment, which drives important biogeochemical processes and influence ecosystem functioning...
February 26, 2018: Marine Environmental Research
E Armynot du Châtelet, F Francescangeli, V M P Bouchet, F Frontalini
On the basis of the available databases including 700 sampling stations from subtidal to salt marsh areas, the purpose of this paper is to synthesise the regional distribution of living benthic foraminifera in transitional environments along the English Channel and southern North Sea. Indicator species analyses assign 37 foraminiferal taxa to high salt marsh, middle salt marsh, low salt marsh, tidal flat, tidal channel, and subtidal environmental units. Species are indicator of a single unit (e.g., Elphidium gunteri for tidal flat) up to four units (e...
February 24, 2018: Marine Environmental Research
A M Faria, A F Lopes, C S E Silva, S C Novais, M F L Lemos, E J Gonçalves
Fishes are currently facing novel types of anthropogenic stressors that have never experienced in their evolutionary history, such as ocean acidification. Under these stressful conditions, energetically costly processes, such as reproduction, may be sacrificed for increased chances of survival. This trade-off does not only affect the organism itself but may result in reduced offspring fitness. In the present study, the effects of exposure to high pCO2 levels were tested on the reproductive performance of a temperate species, the two-spotted goby, Gobiusculus flavescens...
February 24, 2018: Marine Environmental Research
Marcos Rubal, Ricardo Costa-Garcia, Celia Besteiro, Isabel Sousa-Pinto, Puri Veiga
The aims of this study were to explore mollusc assemblages associated with the non-indigenous macroalga Asparagopsis armata, to compare them with those on other macroalgae at the study region and to explore potential differences on mollusc assemblages between two regions in the Atlantic coast of the Iberian Peninsula, where A. armata is present. To achieve this, at each region, four intertidal shores were sampled. Twenty-nine mollusc species were reported and thus, A. armata harboured similar or higher diversity than other annual macroalgae in this area...
February 24, 2018: Marine Environmental Research
D Piló, A B Barbosa, M A Teodósio, J Encarnação, F Leitão, P Range, L A Krug, J Cruz, L Chícharo
This study evaluated the impacts of submarine groundwater discharges (SGD) on a rocky intertidal community of South Portugal, during April-November 2011. Chlorophyll-a concentration was higher at the SGD site in respect to the Reference site. Epibenthic community structure differed between sites, with an increase in Chthamalus spp. and a decrease in macroalgae coverage at the SGD site. The abundance and body size of Mytilus galloprovincialis were consistently higher at the SGD site. During mid-spring, under potentially higher SGD and less favorable conditions for coastal phytoplankton, the ecophysiological condition of M...
February 23, 2018: Marine Environmental Research
S H Woodcock, T Strohmeier, Ø Strand, S A Olsen, R J Bannister
Organic waste released from fin-fish aquaculture is being dispersed further as industry growth has led to the expansion of open net cages in dynamic coastal locations. Here we investigate the response of three mobile epibenthic invertebrates (brittle stars, urchins and brown crabs), whose natural habitats overlap with large scale coastal salmon farming. Using fatty acids and stable isotopes, we found these organisms displayed decreases in δ13 C and δ15 N and elevated levels of C18 fatty acids reflective of terrestrial components of fin-fish feeds...
February 23, 2018: Marine Environmental Research
P S P Vandenbussche, G Spennato, P M Pierson
Human impact on the environment is of widespread concern. The majority of anthropogenic impacts are centred on coastal ecosystems, so surveying them is an important step in the protection of the marine environment. We have tested Oblada melanura (L. 1758) otoliths' fluctuating asymmetry as a bioindicator in a Mediterranean coastal zone. The French Riviera is characterised by a summer population increase leading in particular to more yachting, and seasonal climatic changes with reduced, more concentrated waterway flows and storm events causing soil erosion...
February 22, 2018: Marine Environmental Research
Vincent M P Bouchet, Richard J Telford, Brage Rygg, Eivind Oug, Elisabeth Alve
Benthic macrofauna is one of the most widely used biological groups to assess the ecological status of marine systems. Lately, attention has been paid to similar use of benthic foraminifera. In this study, distribution patterns of benthic foraminiferal and macrofaunal species were investigated simultaneously in 11 fjords in southeastern Norway in order to assess correlations and responses to environmental conditions. Selected fjords allowed to investigate contrasted environmental conditions from low total organic carbon (TOC) content (sediment TOC < 2...
February 22, 2018: Marine Environmental Research
Letizia Di Bella, Michela Ingrassia, Virgilio Frezza, Francesco L Chiocci, Raffaella Pecci, Rossella Bedini, Eleonora Martorelli
The new record of a shallow-water submarine hydrothermal field (<150 m w.d.) in the western Mediterranean Sea (Tyrrhenian Sea, Italy) allows us to study CO2 fluid impact on benthic foraminifers. Benthic foraminifers calcification process is sensitive to ocean acidification and to local chemical and physical parameters of seawater and pore water. Thus, foraminifers can record specific environmental conditions related to hydrothermal fluids, but at present their response to such activity is poorly defined...
February 22, 2018: Marine Environmental Research
Celso A Hernández, Carlos Sangil, Alessandra Fanai, José Carlos Hernández
Primary production and respiration rates were studied for six seaweed species (Cystoseira abies-marina, Lobophora variegata, Pterocladiella capillacea, Canistrocarpus cervicornis, Padina pavonica and Corallina caespitosa) from Subtropical North-East Atlantic, to estimate the combined effects of different pH and temperature levels. Macroalgal samples were cultured at temperature and pH combinations ranging from current levels to those predicted for the next century (19, 21, 23, 25 °C, pH: 8.1, 7.7 and 7.4)...
February 22, 2018: Marine Environmental Research
Nathan Grant, Eugueni Matveev, Amanda S Kahn, Sally P Leys
Bottom-contact trawling generates large, moving clouds of suspended sediments that can alter the behaviour of organisms adjacent to trawl paths. While increased suspended sediment concentrations (SSCs) are known to cause glass sponges to arrest filtration in lab studies, the response of sponges to sediment in situ is not yet known. Here we describe arrest behaviours in response to increased SSCs recorded from the glass sponge Aphrocallistes vastus at the Fraser Ridge sponge reef in the Strait of Georgia, British Columbia, Canada...
February 21, 2018: Marine Environmental Research
Monica Montefalcone, Giada De Falco, Ettore Nepote, Martina Canessa, Marco Bertolino, Giorgio Bavestrello, Carla Morri, Carlo Nike Bianchi
Marine caves are unique and vulnerable habitats exhibiting high biodiversity and heterogeneity, but threatened by multiple global and local disturbances. Marine caves, although widely distributed along the Mediterranean coast, suffer for the lack of quantitative data on their structure and function, which hinder their conservation status assessment. Thanks to the availability of a nearly 30-year-long series of data (1986-2013), we evaluated ecosystem change in the Bergeggi marine cave (Ligurian Sea, NW Mediterranean), a cave with a complex shape and high habitat heterogeneity...
February 21, 2018: Marine Environmental Research
Chiara Ravaglioli, Antonella Capocchi, Debora Fontanini, Giovanna Mori, Caterina Nuccio, Fabio Bulleri
Coastal ecosystems are exposed to multiple stressors. Predicting their outcomes is complicated by variations in their temporal regimes. Here, by means of a 16-month experiment, we investigated tolerance and resistance traits of Posidonia oceanica to herbivore damage under different regimes of nutrient loading. Chronic and pulse nutrient supply were combined with simulated fish herbivory, treated as a pulse stressor. At ambient nutrient levels, P. oceanica could cope with severe herbivory, likely through an increase in photosynthetic activity...
February 21, 2018: Marine Environmental Research
Guilherme N Corte, Thiago Gonçalves-Souza, Helio H Checon, Eduardo Siegle, Ross A Coleman, A Cecília Z Amaral
Community ecology has traditionally assumed that the distribution of species is mainly influenced by environmental processes. There is, however, growing evidence that environmental (habitat characteristics and biotic interactions) and spatial processes (factors that affect a local assemblage regardless of environmental conditions - typically related to dispersal and movement of species) interactively shape biological assemblages. A metacommunity, which is a set of local assemblages connected by dispersal of individuals, is spatial in nature and can be used as a straightforward approach for investigating the interactive and independent effects of both environmental and spatial processes...
February 20, 2018: Marine Environmental Research
Ahmadreza Kohan, Zahra Badbardast, Aliasghar Kohan
Shrimp effluents can affect environmental conditions of the receiving ecosystems, and cause noticeable alterations in the residing communities. Mudskippers, as benthic fish with limited movement, could be affected by aquaculture-induced changes in environmental factors. These changes and subsequent responses of mudskipper assemblage to them, in the northern Persian Gulf, were studied. Some physicochemical and biological characteristics of the environment in addition to density, length, weight, and condition (i...
February 20, 2018: Marine Environmental Research
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