keyword
MENU ▼
Read by QxMD icon Read
search

Marine Ecology

keyword
https://www.readbyqxmd.com/read/28738205/developing-and-applying-a-site-specific-multimedia-fate-model-to-address-ecological-risk-of-oxytetracycline-discharged-with-aquaculture-effluent-in-coastal-waters-off-jangheung-korea
#1
Woojung Kim, Yunho Lee, Sang Don Kim
The overuse of oxytetracycline (OTC) in aquaculture has become a problem because of its chronic toxic effects on marine ecosystems. The present study assessed the ecological risk of OTC in the coastal waters near the Jangheung Flatfish Farm using a site-specific multimedia fate model to analyze exposure. Before the model was applied, its performance was validated by comparing it with field data. The coastal waters in the testbed were sampled and analyzed using liquid chromatography-tandem mass spectrometry (LC-MS/MS) followed by solid-phase extraction (SPE)...
July 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734264/a-small-scale-portable-method-for-extracting-microplastics-from-marine-sediments
#2
Rachel L Coppock, Matthew Cole, Penelope K Lindeque, Ana M Queirós, Tamara S Galloway
Microplastics (plastic particles, 0.1 μm-5 mm in size) are widespread marine pollutants, accumulating in benthic sediments and shorelines the world over. To gain a clearer understanding of microplastic availability to marine life, and the risks they pose to the health of benthic communities, ecological processes and food security, it is important to obtain accurate measures of microplastic abundance in marine sediments. To date, methods for extracting microplastics from marine sediments have been disadvantaged by complexity, expense, low extraction efficiencies and incompatibility with very fine sediments...
July 19, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732330/legacy-persistent-organic-pollutants-including-pbdes-in-the-trophic-web-of-the-ross-sea-antarctica
#3
Simonetta Corsolini, Nicoletta Ademollo, Tania Martellini, Demetrio Randazzo, Marino Vacchi, Alessandra Cincinelli
The ecological features of the Ross Sea trophic web are peculiar and different from other polar food webs, with respect to the use of habitat and species interactions; due to its ecosystem integrity, it is the world's largest Marine Protected Area, established in 2016. Polar organisms are reported to bioaccumulate lipophilic contaminant, viz persistent organic pollutants (POPs). Legacy POPs and flame retardants (polybrominated diphenyl ethers, PBDEs) were studied in key species of the Ross Sea (Euphausia superba, Pleuragramma antarctica) and their predators (Dissostichus mawsoni, Pygoscelis adeliae, Aptenodytes forsteri, Catharacta maccormicki, Leptonychotes weddellii)...
July 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28731569/diversity-in-thermal-affinity-among-key-piscivores-buffers-impacts-of-ocean-warming-on-predator-prey-interactions
#4
Rebecca L Selden, Ryan D Batt, Vincent S Saba, Malin L Pinsky
Asymmetries in responses to climate change have the potential to alter important predator-prey interactions, in part by altering the location and size of spatial refugia for prey. We evaluated the effect of ocean warming on interactions between four important piscivores and four of their prey in the U.S. Northeast Shelf by examining species overlap under historical conditions (1968-2014) and with a doubling in CO2 . Because both predator and prey shift their distributions in response to changing ocean conditions, the net impact of warming or cooling on predator-prey interactions was not determined a priori from the range extent of either predator or prey alone...
July 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28731474/bacterial-transcriptome-remodeling-during-sequential-co-culture-with-a-marine-dinoflagellate-and-diatom
#5
Marine Landa, Andrew S Burns, Selena J Roth, Mary Ann Moran
In their role as primary producers, marine phytoplankton modulate heterotrophic bacterial activities through differences in the types and amounts of organic matter they release. This study investigates the transcriptional response of bacterium Ruegeria pomeroyi, a member of the Roseobacter clade known to affiliate with diverse phytoplankton groups in the ocean, during a shift in phytoplankton taxonomy. The bacterium was initially introduced into a culture of the dinoflagellate Alexandrium tamarense, and then experienced a change in phytoplankton community composition as the diatom Thalassiosira pseudonana gradually outcompeted the dinoflagellate...
July 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28731469/novel-chaperonins-are-prevalent-in-the-virioplankton-and-demonstrate-links-to-viral-biology-and-ecology
#6
Rachel L Marine, Daniel J Nasko, Jeffrey Wray, Shawn W Polson, K Eric Wommack
Chaperonins are protein-folding machinery found in all cellular life. Chaperonin genes have been documented within a few viruses, yet, surprisingly, analysis of metagenome sequence data indicated that chaperonin-carrying viruses are common and geographically widespread in marine ecosystems. Also unexpected was the discovery of viral chaperonin sequences related to thermosome proteins of archaea, indicating the presence of virioplankton populations infecting marine archaeal hosts. Virioplankton large subunit chaperonin sequences (GroELs) were divergent from bacterial sequences, indicating that viruses have carried this gene over long evolutionary time...
July 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28731468/a-role-for-the-cell-wall-protein-silacidin-in-cell-size-of-the-diatom-thalassiosira-pseudonana
#7
Amy R Kirkham, Patrick Richthammer, Katrin Schmidt, Martin Wustmann, Yoshiaki Maeda, René Hedrich, Eike Brunner, Tsuyoshi Tanaka, Karl-Heinz van Pée, Angela Falciatore, Thomas Mock
Diatoms contribute 20% of global primary production and form the basis of many marine food webs. Although their species diversity correlates with broad diversity in cell size, there is also an intraspecific cell-size plasticity owing to sexual reproduction and varying environmental conditions. However, despite the ecological significance of the diatom cell size for food-web structure and global biogeochemical cycles, our knowledge about genes underpinning the size of diatom cells remains elusive. Here, a combination of reverse genetics, experimental evolution and comparative RNA-sequencing analyses enabled us to identify a previously unknown genetic control of cell size in the diatom Thalassiosira pseudonana...
July 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28729861/comparative-omics-and-trait-analyses-of-marine-pseudoalteromonas-phages-advance-the-phage-otu-concept
#8
Melissa B Duhaime, Natalie Solonenko, Simon Roux, Nathan C Verberkmoes, Antje Wichels, Matthew B Sullivan
Viruses influence the ecology and evolutionary trajectory of microbial communities. Yet our understanding of their roles in ecosystems is limited by the paucity of model systems available for hypothesis generation and testing. Further, virology is limited by the lack of a broadly accepted conceptual framework to classify viral diversity into evolutionary and ecologically cohesive units. Here, we introduce genomes, structural proteomes, and quantitative host range data for eight Pseudoalteromonas phages isolated from Helgoland (North Sea, Germany) and use these data to advance a genome-based viral operational taxonomic unit (OTU) definition...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28729854/microbiome-of-trichodesmium-colonies-from-the-north-pacific-subtropical-gyre
#9
Mary R Gradoville, Byron C Crump, Ricardo M Letelier, Matthew J Church, Angelicque E White
Filamentous diazotrophic Cyanobacteria of the genus Trichodesmium, often found in colonial form, provide an important source of new nitrogen to tropical and subtropical marine ecosystems. Colonies are composed of several clades of Trichodesmium in association with a diverse community of bacterial and eukaryotic epibionts. We used high-throughput 16S rRNA and nifH gene sequencing, carbon (C) and dinitrogen (N2) fixation assays, and metagenomics to describe the diversity and functional potential of the microbiome associated with Trichodesmium colonies collected from the North Pacific Subtropical Gyre (NPSG)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28727261/more-than-meets-the-eye-the-barrier-effect-of-the-yangtze-river-outflow
#10
Gang Ni, Elizabeth Kern, Yun-Wei Dong, Qi Li, Joong-Ki Park
The Yangtze (Changjiang) River enters the East China Sea with huge annual freshwater and sediment deposits. This outflow, known as the Changjiang Diluted Water (CDW), causes striking ecological gradients that potentially shape coastal species' distribution and differentiation. The CDW has long been rendered as a marine biogeographic boundary separating cold-temperature and warm-water faunas, but it remains unclear whether and to what extent it acts as an intraspecific barrier. Here we synthesize published phylogeographic studies related to the CDW to address these issues...
July 20, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28727217/adaptation-strategies-to-climate-change-in-marine-systems
#11
Dana D Miller, Yoshitaka Ota, U Rashid Sumaila, Andrés M Cisneros-Montemayor, William W L Cheung
The world's oceans are highly impacted by climate change and other human pressures, with significant implications for marine ecosystems and the livelihoods that they support. Adaptation for both natural and human systems is increasingly important as a coping strategy due to the rate and scale of ongoing and potential future change. Here, we conduct a review of literature concerning specific case studies of adaptation in marine systems, and discuss associated characteristics and influencing factors, including drivers, strategy, timeline, costs, and limitations...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28725664/morphotypes-and-pigment-profiles-of-halophilic-bacteria-practical-data-useful-for-novelty-taxonomic-categorization-and-for-describing-novel-species-or-new-taxa
#12
Bhagwan N Rekadwad, Chandrahasya N Khobragade
Halophilic bacteria were isolated from oil spill samples collected from West-coast of Goa. Bacteria were isolated from oil studded soil, salt marsh and offshore samples (A, A7, CSM, CB and CM) collected along the West coastline in Goa (India) i.e. Arambol beach, Calanguate beach, Candolim beach and Colva beach on Zobell Marine agar, R2A agar, Mannitol salt agar and Blood agar at temperature 22 to 24 °C. Isolates showed growth in the presence of hydrocarbons (1% phenanthrene and 2% bitumen). Diverse profiles of pigments were observed on different nutrient medium...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28725435/biogeophysical-and-physiological-processes-drive-movement-patterns-in-a-marine-predator
#13
Lucy A Howey, Bradley M Wetherbee, Emily R Tolentino, Mahmood S Shivji
BACKGROUND: Blue sharks (Prionace glauca) are among the most abundant and widely distributed of oceanic elasmobranchs. Millions are taken annually in pelagic longline fisheries and comprise the highest component of auctioned fin weight in the international shark fin trade. Though studies of blue sharks outnumber those of other large pelagic sharks, the species' complicated and sexually segregated life history still confound current understanding of Atlantic movement patterns. Lack of detailed information regarding movement and vertical behavior continues to limit management efforts that require such data for stock assessment and sustainable catch modeling...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28724227/carbon-and-nitrogen-allocation-strategy-in-posidonia-oceanica-is-altered-by-seawater-acidification
#14
Andrea Scartazza, Stefano Moscatello, Olga Gavrichkova, Maria Cristina Buia, Marco Lauteri, Alberto Battistelli, Maurizio Lorenti, Samantha Laird Garrard, Carlo Calfapietra, Enrico Brugnoli
Rising atmospheric CO2 causes ocean acidification that represents one of the major ecological threats for marine biota. We tested the hypothesis that long-term exposure to increased CO2 level and acidification in a natural CO2 vent system alters carbon (C) and nitrogen (N) metabolism in Posidonia oceanica L. (Delile), affecting its resilience, or capability to restore the physiological homeostasis, and the nutritional quality of organic matter available for grazers. Seawater acidification decreased the C to N ratio in P...
July 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28723935/responses-of-molluscan-communities-to-centuries-of-human-impact-in-the-northern-adriatic-sea
#15
Ivo Gallmetzer, Alexandra Haselmair, Adam Tomašových, Michael Stachowitsch, Martin Zuschin
In sediment cores spanning ~500 years of history in the Gulf of Trieste, down-core changes in molluscan community structure are characterized by marked shifts in species and functional composition. Between the 16th and 19th century, a strong heavy metal contamination of the sediments, most notably by Hg, together with the effects of natural climatic oscillations (increased sedimentation and organic enrichment) drive community changes. Since the early 20th century up to 2013, the combined impacts of cultural eutrophication, frequent hypoxic events and intensifying bottom trawling replace heavy metal contamination and climatic factors as the main drivers...
2017: PloS One
https://www.readbyqxmd.com/read/28721507/the-diversity-and-antibiotic-properties-of-actinobacteria-associated-with-endemic-deepwater-amphipods-of-lake-baikal
#16
Eugenii S Protasov, Denis V Axenov-Gribanov, Yuriy V Rebets, Irina V Voytsekhovskaya, Bogdan T Tokovenko, Zhanna M Shatilina, Andriy N Luzhetskyy, Maxim A Timofeyev
The emergence of pathogenic bacteria resistant to antibiotics increases the need for discovery of new effective antimicrobials. Unique habitats such as marine deposits, wetlands and caves or unexplored biological communities are promising sources for the isolation of actinobacteria, which are among the major antibiotic producers. The present study aimed at examining cultivated actinobacteria strains associated with endemic Lake Baikal deepwater amphipods and estimating their antibiotic activity. We isolated 42 actinobacterial strains from crustaceans belonging to Ommatogammarus albinus and Ommatogammarus flavus...
July 18, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28721506/interaction-between-a-bacterivorous-ciliate-aspidisca-cicada-and-a-rotifer-lecane-inermis-doozers-and-fraggles-in-aquatic-flocs
#17
Aleksandra Walczyńska, Mateusz Sobczyk, Edyta Fiałkowska, Agnieszka Pajdak-Stós, Janusz Fyda, Krzysztof Wiąckowski
Activated sludge is a semi-natural habitat composed of macroaggregates made by flocculating bacteria and inhabited by numerous protozoans and metazoans, creating a complicated interactome. The activated sludge resembles the biological formation of naturally occurring floc habitats, such as "marine snow." So far, these two types of habitat have been analyzed separately, despite their similarities. We examined the effect of a bacterivorous ciliate, Aspidisca cicada, on the quality of the macroaggregate ecosystem by estimating (i) the floc characteristics, (ii) the proliferation of other bacterivores (rotifers), and (iii) the chemical processes...
July 19, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28720866/surges-in-trematode-prevalence-linked-to-centennial-scale-flooding-events-in-the-adriatic
#18
Daniele Scarponi, Michele Azzarone, Michał Kowalewski, John Warren Huntley
The forecasts of increasing global temperature and sea level rise have led to concern about the response of parasites to anthropogenic climate change. Whereas ecological studies of parasite response to environmental shifts are necessarily limited to short time scales, the fossil record can potentially provide a quantitative archive of long-term ecological responses to past climate transitions. Here, we document multi-centennial scale changes in prevalence of trematodes infesting the bivalve host Abra segmentum through multiple sea-level fluctuations preserved in brackish Holocene deposits of the Po Plain, Italy...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720760/exploring-spatial-and-temporal-trends-in-the-soundscape-of-an-ecologically-significant-embayment
#19
R L Putland, R Constantine, C A Radford
The Hauraki Gulf, a shallow embayment in north-eastern New Zealand, provides an interesting environment for ecological soundscape research. It is situated on a tectonic plate boundary, contains one of the busiest ports in the southern hemisphere and is home to a diverse range of soniferous animals. The underwater soundscape was monitored for spatial and temporal trends at six different listening stations using passive acoustic recorders. The RMS sound pressure level of ambient sound (50-24,000 Hz) at the six listening stations was similar, ranging from 90-110 dB re 1 μPa throughout the recording period...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719737/a-novel-framework-for-analyzing-conservation-impacts-evaluation-theory-and-marine-protected-areas
#20
REVIEW
Michael B Mascia, Helen E Fox, Louise Glew, Gabby N Ahmadia, Arun Agrawal, Megan Barnes, Xavier Basurto, Ian Craigie, Emily Darling, Jonas Geldmann, David Gill, Susie Holst Rice, Olaf P Jensen, Sarah E Lester, Patrick McConney, Peter J Mumby, Mateja Nenadovic, John E Parks, Robert S Pomeroy, Alan T White
Environmental conservation initiatives, including marine protected areas (MPAs), have proliferated in recent decades. Designed to conserve marine biodiversity, many MPAs also seek to foster sustainable development. As is the case for many other environmental policies and programs, the impacts of MPAs are poorly understood. Social-ecological systems, impact evaluation, and common-pool resource governance are three complementary scientific frameworks for documenting and explaining the ecological and social impacts of conservation interventions...
July 2017: Annals of the New York Academy of Sciences
keyword
keyword
8293
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"