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Marine Ecology

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https://www.readbyqxmd.com/read/27933046/phylogenetic-signals-of-salinity-and-season-in-bacterial-community-composition-across-the-salinity-gradient-of-the-baltic-sea
#1
Daniel P R Herlemann, Daniel Lundin, Anders F Andersson, Matthias Labrenz, Klaus Jürgens
Understanding the key processes that control bacterial community composition has enabled predictions of bacterial distribution and function within ecosystems. In this study, we used the Baltic Sea as a model system to quantify the phylogenetic signal of salinity and season with respect to bacterioplankton community composition. The abundances of 16S rRNA gene amplicon sequencing reads were analyzed from samples obtained from similar geographic locations in July and February along a brackish to marine salinity gradient in the Baltic Sea...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27932914/macrobenthic-molluscs-from-a-marine-lagoonal-environmental-transition-in-lesvos-island-greece
#2
Athanasios Evagelopoulos, Drosos Koutsoubas, Vasilis Gerovasileiou, Nikolaos Katsiaras
BACKGROUND: This paper describes an occurence dataset, also including numerical abundance and biomass data, pertaining to the macrobenthic molluscan assemblages from a marine - lagoonal environmental transition. The study system was the soft-substrate benthoscape of the area of the Kalloni solar saltworks (Lesvos Island, Greece). Specifically, the study area extended from the infralittoral zone of the inner Kalloni Gulf (marine habitat) to the bottoms of the first two evaporation ponds of the Kalloni solar saltworks (lagoonal habitat)...
2016: Biodiversity Data Journal
https://www.readbyqxmd.com/read/27932909/cigesmed-for-divers-establishing-a-citizen-science-initiative-for-the-mapping-and-monitoring-of-coralligenous-assemblages-in-the-mediterranean-sea
#3
Vasilis Gerovasileiou, Thanos Dailianis, Emmanouela Panteri, Nikitas Michalakis, Giulia Gatti, Maria Sini, Charalampos Dimitriadis, Yiannis Issaris, Maria Salomidi, Irene Filiopoulou, Alper Doğan, Laure Thierry de Ville d'Avray, Romain David, Melih Ertan Ҫinar, Drosos Koutsoubas, Jean-Pierre Féral, Christos Arvanitidis
BACKGROUND: Over the last decade, inventorying and monitoring of marine biodiversity has significantly benefited from the active engagement of volunteers. Although several Citizen Science projects concern tropical reef ecosystems worldwide, none of the existing initiatives has yet specifically focused on their Mediterranean equivalents. Mediterranean coralline reefs, known as "coralligenous", are bioherms primarily built by calcifying rhodophytes on hard substrates under dim-light conditions; they are considered hotspots of biodiversity and are extremely popular among divers due to their complex structure, conspicuous biological wealth and high aesthetic value...
2016: Biodiversity Data Journal
https://www.readbyqxmd.com/read/27932904/brachiopoda-of-greece-an-annotated-checklist
#4
Vasilis Gerovasileiou, Nicolas Bailly
BACKGROUND: Until today, only scattered species records of Brachiopoda from Greece have been included in publications on the Mediterranean brachiopod fauna. These records were mostly based on material collected during marine expeditions in the eastern Mediterranean decades ago, while few recent additional records appear in ecological studies. The aim of this paper was to give the first checklist of brachiopod species of Greece, in the framework of the Greek Taxon Information System (GTIS) initiative of the LifeWatchGreece Research Infrastructure (ESFRI), by reviewing the existing literature...
2016: Biodiversity Data Journal
https://www.readbyqxmd.com/read/27931868/a-critical-review-of-the-potential-impacts-of-marine-seismic-surveys-on-fish-invertebrates
#5
REVIEW
A G Carroll, R Przeslawski, A Duncan, M Gunning, B Bruce
Marine seismic surveys produce high intensity, low-frequency impulsive sounds at regular intervals, with most sound produced between 10 and 300Hz. Offshore seismic surveys have long been considered to be disruptive to fisheries, but there are few ecological studies that target commercially important species, particularly invertebrates. This review aims to summarise scientific studies investigating the impacts of low-frequency sound on marine fish and invertebrates, as well as to critically evaluate how such studies may apply to field populations exposed to seismic operations...
December 5, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27929402/extraction-and-quantification-of-bioactive-tyrian-purple-precursors-a-comparative-and-validation-study-from-the-hypobranchial-gland-of-a-muricid-dicathais-orbita
#6
Roselyn Valles-Regino, Peter Mouatt, David Rudd, Lachlan H Yee, Kirsten Benkendorff
Muricidae are marine molluscs known for the production of Tyrian purple and bioactive precursor compounds. A validation study for the extraction and analysis of secondary metabolites found in the hypobranchial gland of the muricid Dicathais orbita is reported, using high performance liquid chromatography-mass spectrometry (HPLC-MS) with diode array detector (DAD). Quantification of the dominant secondary metabolites from D. orbita is described, followed by a comparison of solvent extraction procedures and stability studies...
December 5, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27929021/host-genome-integration-and-giant-virus-induced-reactivation-of-the-virophage-mavirus
#7
Matthias G Fischer, Thomas Hackl
Endogenous viral elements are increasingly found in eukaryotic genomes, yet little is known about their origins, dynamics, or function. Here we provide a compelling example of a DNA virus that readily integrates into a eukaryotic genome where it acts as an inducible antiviral defence system. We found that the virophage mavirus, a parasite of the giant Cafeteria roenbergensis virus (CroV), integrates at multiple sites within the nuclear genome of the marine protozoan Cafeteria roenbergensis. The endogenous mavirus is structurally and genetically similar to eukaryotic DNA transposons and endogenous viruses of the Maverick/Polinton family...
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27922602/elevated-temperature-increases-carbon-and-nitrogen-fluxes-between-phytoplankton-and-heterotrophic-bacteria-through-physical-attachment
#8
Nestor Arandia-Gorostidi, Peter K Weber, Laura Alonso-Sáez, Xosé Anxelu G Morán, Xavier Mayali
Quantifying the contribution of marine microorganisms to carbon and nitrogen cycles and their response to predicted ocean warming is one of the main challenges of microbial oceanography. Here we present a single-cell NanoSIMS isotope analysis to quantify C and N uptake by free-living and attached phytoplankton and heterotrophic bacteria, and their response to short-term experimental warming of 4 °C. Elevated temperature increased total C fixation by over 50%, a small but significant fraction of which was transferred to heterotrophs within 12 h...
December 6, 2016: ISME Journal
https://www.readbyqxmd.com/read/27922601/the-effect-of-extrinsic-mortality-on-genome-size-evolution-in-prokaryotes
#9
Piotr Bentkowski, Cock van Oosterhout, Ben Ashby, Thomas Mock
Mortality has a significant role in prokaryotic ecology and evolution, yet the impact of variations in extrinsic mortality on prokaryotic genome evolution has received little attention. We used both mathematical and agent-based models to reveal how variations in extrinsic mortality affect prokaryotic genome evolution. Our results suggest that the genome size of bacteria increases with increased mortality. A high extrinsic mortality increases the pool of free resources and shortens life expectancy, which selects for faster reproduction, a phenotype we called 'scramblers'...
December 6, 2016: ISME Journal
https://www.readbyqxmd.com/read/27921317/effects-of-economics-and-demographics-on-global-fisheries-sustainability
#10
Qi Ding, Yali Wang, Xinjun Chen, Yong Chen
A good understanding of social factors that lead to marine ecological change is important to develop sustainable global fisheries. In this study we analyzed how economic prosperity and population growth in 122 nations might ultimately affect the sustainability of their marine ecosystems during the period of 1970-2010 using a balanced panel model. We used marine Economic Exclusive Zone (EEZ) catch, mean trophic level of fishery landings (MTL), the primary production required to sustain marine catch expressed as percentage of local primary production (%PPR), and the loss in secondary production index (L index) to indicate ecological changes in marine ecosystems...
December 6, 2016: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/27920387/adaptive-capabilities-and-fitness-consequences-associated-with-pollution-exposure-in-fish
#11
REVIEW
Patrick B Hamilton, Gregor Rolshausen, Tamsyn M Uren Webster, Charles R Tyler
Many fish populations are exposed to harmful levels of chemical pollution and selection pressures associated with these exposures have led to the evolution of tolerance. Our understanding of the physiological basis for these adaptations is limited, but they are likely to include processes involved with the absorption, distribution, metabolism and/or excretion of the target chemical. Other potential adaptive mechanisms include enhancements in antioxidant responses, an increased capacity for DNA and/or tissue repair and alterations to the life cycle of fish that enable earlier reproduction...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27919535/occurrences-composition-profiles-and-source-identifications-of-polycyclic-aromatic-hydrocarbons-pahs-polybrominated-diphenyl-ethers-pbdes-and-polychlorinated-biphenyls-pcbs-in-ship-ballast-sediments
#12
Peng-Hao Su, Bao-Yi Lv, Gregg T Tomy, Jin-Xiang Xu, Wen Tian, Chun-Yan Hou, Fang Yin, Yi-Fan Li, Dao-Lun Feng
The aim of this study was to investigate the levels of persistent organic pollutants (POPs) including polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) in ship ballast sediments. The ballast sediment samples were collected from six merchant ships docked in 2015 in Jiangyin City, China. Ballast sediments represent a potential vector for the transport of POPs and invasive species between marine environments. An attempt was also made to determine the sources of these compounds in the ballast sediment...
December 2, 2016: Chemosphere
https://www.readbyqxmd.com/read/27917039/echinoids-of-the-kerguelen-plateau-occurrence-data-and-environmental-setting-for-past-present-and-future-species-distribution-modelling
#13
Charlène Guillaumot, Alexis Martin, Salomé Fabri-Ruiz, Marc Eléaume, Thomas Saucède
The present dataset provides a case study for species distribution modelling (SDM) and for model testing in a poorly documented marine region. The dataset includes spatially-explicit data for echinoid (Echinodermata: Echinoidea) distribution. Echinoids were collected during oceanographic campaigns led around the Kerguelen Plateau (+63°/+81°E; -46°/-56°S) since 1872. In addition to the identification of collection specimens from historical cruises, original data from the recent campaigns POKER II (2010) and PROTEKER 2 to 4 (2013-2015) are also provided...
2016: ZooKeys
https://www.readbyqxmd.com/read/27917011/an-unprecedented-coastwide-toxic-algal-bloom-linked-to-anomalous-ocean-conditions
#14
Ryan M McCabe, Barbara M Hickey, Raphael M Kudela, Kathi A Lefebvre, Nicolaus G Adams, Brian D Bill, Frances M D Gulland, Richard E Thomson, William P Cochlan, Vera L Trainer
A coastwide bloom of the toxigenic diatom Pseudo-nitzschia in spring 2015 resulted in the largest recorded outbreak of the neurotoxin, domoic acid, along the North American west coast. Elevated toxins were measured in numerous stranded marine mammals and resulted in geographically extensive and prolonged closures of razor clam, rock crab, and Dungeness crab fisheries. We demonstrate that this outbreak was initiated by anomalously warm ocean conditions. Pseudo-nitzschia australis thrived north of its typical range in the warm, nutrient-poor water that spanned the northeast Pacific in early 2015...
October 16, 2016: Geophysical Research Letters
https://www.readbyqxmd.com/read/27913956/pollution-characteristics-and-ecological-risk-of-heavy-metals-in-ballast-tank-sediment
#15
Daolun Feng, Xiaofei Chen, Wen Tian, Qun Qian, Hao Shen, Dexiang Liao, Baoyi Lv
This study was conducted to illustrate the contents and potential ecological risk of heavy metals in ballast tank sediment. Ballast sediment samples were collected from six ships during their stay in shipyard, and the heavy metals were determined by inductive coupled plasma emission spectrometer. Results showed that high concentrations of heavy metals were detected in all six sediment samples following the order: Zn > Cu > Pb > Cr > As > Cd > Hg. The geoaccumulation index explained the average pollution degree of heavy metals decreased as the following: Zn > Pb > Cu > As > Cr > Hg, and the environmental risk indices suggested that concentration found of Zn, Pb, and Cu might be highly toxic to aquatic organisms...
December 2, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27913071/determination-and-validation-of-an-aquatic-maximum-acceptable-concentration-environmental-quality-standard-mac-eqs-value-for-the-agricultural-fungicide-azoxystrobin
#16
Elsa Teresa Rodrigues, Miguel Ângelo Pardal, Cristiano Gante, João Loureiro, Isabel Lopes
The main goal of the present study was to determine and validate an aquatic Maximum Acceptable Concentration-Environmental Quality Standard (MAC-EQS) value for the agricultural fungicide azoxystrobin (AZX). Assessment factors were applied to short-term toxicity data using the lowest EC50 and after the Species Sensitivity Distribution (SSD) method. Both ways of EQS generation were applied to a freshwater toxicity dataset for AZX based on available data, and to marine toxicity datasets for AZX and Ortiva(®) (a commercial formulation of AZX) obtained by the present study...
November 29, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27911770/the-right-incentives-enable-ocean-sustainability-successes-and-provide-hope-for-the-future
#17
Jane Lubchenco, Elizabeth B Cerny-Chipman, Jessica N Reimer, Simon A Levin
Healthy ocean ecosystems are needed to sustain people and livelihoods and to achieve the United Nations Sustainable Development Goals. Using the ocean sustainably requires overcoming many formidable challenges: overfishing, climate change, ocean acidification, and pollution. Despite gloomy forecasts, there is reason for hope. New tools, practices, and partnerships are beginning to transform local fisheries, biodiversity conservation, and marine spatial planning. The challenge is to bring them to a global scale...
December 2, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27909926/metals-as-chemical-tracers-to-discriminate-ecological-populations-of-threatened-franciscana-dolphins-pontoporia-blainvillei-from-argentina
#18
M B Romero, P Polizzi, L Chiodi, A Robles, K Das, M Gerpe
Franciscana dolphins are the most impacted small cetacean in the Southwestern Atlantic Ocean, classified as Vulnerable A3d by IUCN. Essential (Fe, Mo, Mn, Cr, Ni, Co) and non-essential (Ag, Pb, Sn) trace elements (TEs) were measured in liver, kidney, and brain samples of by-catch Franciscana dolphins that were living in estuarine (n = 21) and marine (n = 21) habitats (1) to assess whether TEs posed a threat and (2) to evaluate the suitability of TEs for discriminating ecological populations of this species in Argentinean waters...
December 1, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27907100/patterns-of-fish-connectivity-between-a-marine-protected-area-and-surrounding-fished-areas
#19
Rita Sahyoun, Paolo Guidetti, Antonio Di Franco, Serge Planes
Patterns of connectivity and self-recruitment are recognized as key factors shaping the dynamics of marine populations. Connectivity is also essential for maintaining and restoring natural ecological processes with genetic diversity contributing to the adaptation and persistence of any species in the face of global disturbances. Estimates of connectivity are crucial to inform the design of both marine protected areas (MPAs) and MPA networks. Among several approaches, genetic structure is frequently used as a proxy for patterns of connectivity...
2016: PloS One
https://www.readbyqxmd.com/read/27905533/five-key-attributes-can-increase-marine-protected-areas-performance-for-small-scale-fisheries-management
#20
Antonio Di Franco, Pierre Thiriet, Giuseppe Di Carlo, Charalampos Dimitriadis, Patrice Francour, Nicolas L Gutiérrez, Alain Jeudy de Grissac, Drosos Koutsoubas, Marco Milazzo, María Del Mar Otero, Catherine Piante, Jeremiah Plass-Johnson, Susana Sainz-Trapaga, Luca Santarossa, Sergi Tudela, Paolo Guidetti
Marine protected areas (MPAs) have largely proven to be effective tools for conserving marine ecosystem, while socio-economic benefits generated by MPAs to fisheries are still under debate. Many MPAs embed a no-take zone, aiming to preserve natural populations and ecosystems, within a buffer zone where potentially sustainable activities are allowed. Small-scale fisheries (SSF) within buffer zones can be highly beneficial by promoting local socio-economies. However, guidelines to successfully manage SSFs within MPAs, ensuring both conservation and fisheries goals, and reaching a win-win scenario, are largely unavailable...
December 1, 2016: Scientific Reports
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