keyword
MENU ▼
Read by QxMD icon Read
search

Marine Ecology

keyword
https://www.readbyqxmd.com/read/28632943/habitat-coupling-writ-large-pelagic-derived-materials-fuel-benthivorous-macroalgal-reef-fishes-in-an-upwelling-zone
#1
Felipe Docmac, Miguel Araya, Ivan A Hinojosa, Cristina Dorador, Chris Harrod
Coastal marine upwelling famously supports elevated levels of pelagic biological production, but can also subsidise production in inshore habitats via pelagic-benthic coupling. Consumers inhabiting macroalgae-dominated rocky reef habitats are often considered to be members of a food web fuelled by energy derived from benthic primary production; conversely, they may also be subsidised by materials transported from pelagic habitats. Here, we used stable isotopes (δ(13) C, δ(15) N) to examine the relative contribution of pelagic and benthic materials to an ecologically and economically important benthivorous fish assemblage inhabiting subtidal macroalgae-dominated reefs along ~1000 km of the northern Chilean coast where coastal upwelling is active...
June 20, 2017: Ecology
https://www.readbyqxmd.com/read/28630803/putative-archaeal-viruses-from-the-mesopelagic-ocean
#2
Dean R Vik, Simon Roux, Jennifer R Brum, Ben Bolduc, Joanne B Emerson, Cory C Padilla, Frank J Stewart, Matthew B Sullivan
Oceanic viruses that infect bacteria, or phages, are known to modulate host diversity, metabolisms, and biogeochemical cycling, while the viruses that infect marine Archaea remain understudied despite the critical ecosystem roles played by their hosts. Here we introduce "MArVD", for Metagenomic Archaeal Virus Detector, an annotation tool designed to identify putative archaeal virus contigs in metagenomic datasets. MArVD is made publicly available through the online iVirus analytical platform. Benchmarking analysis of MArVD showed it to be >99% accurate and 100% sensitive in identifying the 127 known archaeal viruses among the 12,499 viruses in the VirSorter curated dataset...
2017: PeerJ
https://www.readbyqxmd.com/read/28630429/marine-diatoms-change-their-gene-expression-profile-when-exposed-to-microscale-turbulence-under-nutrient-replete-conditions
#3
Alberto Amato, Gianluca Dell'Aquila, Francesco Musacchia, Rossella Annunziata, Ari Ugarte, Nicolas Maillet, Alessandra Carbone, Maurizio Ribera d'Alcalà, Remo Sanges, Daniele Iudicone, Maria I Ferrante
Diatoms are a fundamental microalgal phylum that thrives in turbulent environments. Despite several experimental and numerical studies, if and how diatoms may profit from turbulence is still an open question. One of the leading arguments is that turbulence favours nutrient uptake. Morphological features, such as the absence of flagella, the presence of a rigid exoskeleton and the micrometre size would support the possible passive but beneficial role of turbulence on diatoms. We demonstrate that in fact diatoms actively respond to turbulence in non-limiting nutrient conditions...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28627075/chemistry-of-two-distinct-aeolid-spurilla-species-ecological-implications
#4
M Letizia Ciavatta, Stella García-Matucheski, Marianna Carbone, Guido Villani, Claudia Muniain, Margherita Gavagnin
The lipophilic extracts of two marine aeolid nudibranch molluscs of the genus Spurilla collected in distinct geographical areas have been chemically analysed. The Et2 O extracts of the nudibranchs were dominated by the presence of usual fatty acids and sterols and contained terpenoid compounds 1-3 as minor metabolites. Spurillin A (1) and spurillin B (3) were new molecules whereas cis-γ-monocyclo-farnesol (2) was already reported in the literature as a synthesis product. Interestingly, bursatellin (4), previously isolated from anaspidean molluscs of the genus Bursatella, was found in the butanol extract of both Spurilla species...
June 19, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28626905/genome-architecture-enables-local-adaptation-of-atlantic-cod-despite-high-connectivity
#5
Julia M I Barth, Paul R Berg, Per R Jonsson, Sara Bonanomi, Hanna Corell, Jakob Hemmer-Hansen, Kjetill S Jakobsen, Kerstin Johannesson, Per Erik Jorde, Halvor Knutsen, Per-Olav Moksnes, Bastiaan Star, Nils Chr Stenseth, Henrik Svedäng, Sissel Jentoft, Carl André
Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species characterized by strong levels of gene flow. As one example, populations of the marine fish Atlantic cod (Gadus morhua) are highly connected due to immense dispersal capabilities but nevertheless show local adaptation in several key traits...
June 19, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28626749/a-century-spent-combating-rabies-in-morocco-1911-2015-how-much-longer
#6
Sami Darkaoui, Florence Cliquet, Marine Wasniewski, Emmanuelle Robardet, Nadia Aboulfidaa, Mohammed Bouslikhane, Ouafaa Fassi-Fihri
Rabies has no known beginning in Morocco and to date, government control efforts and plans fail to eradicate the disease. A review and analysis of available epidemiological data are crucial to learn lessons from the past and to propose effective actions. Legally, animal rabies is a notifiable disease since 1913 and legislation has been updated periodically since. Dogs have always been considered as both the disease's vector and reservoir, while cattle, other herbivores, and humans are victims. Animal rabies cases evolution from 1942 to 2015 is characterized by ascending phase then decreasing one following structured rabies control plan implementation in 1980s...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28625873/an-approach-to-the-study-of-the-immunity-functions-of-bivalve-haemocytes-physiology-and-molecular-aspects
#7
REVIEW
Mario Alberto Burgos-Aceves, Caterina Faggio
The Mediterranean mussel Mytilus galloprovincialis is an ecologically and economically important species. It has been used in programs of monitoring of pollutions, since it is sessile organism that is capable of accumulating pollutants in tissues through filter feeding. Due to an increase of pollutants in the environment, marine mussels present physiological alterations that compromise their innate immune system, which can latter lead to opportunistic diseases. The haemocytes are the cells in charge of the immune response in the Mediterranean mussel and in other mollusks...
June 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28625778/analysis-of-phytoplankton-assemblage-structure-in-the-mediterranean-sea-based-on-high-throughput-sequencing-of-partial-18s-rrna-sequences
#8
Antonella Penna, Silvia Casabianca, Antonio Fernandez Guerra, Cristiano Vernesi, Michele Scardi
Studying taxonomic and ecological diversity of phytoplankton assemblages is often difficult because morphological analysis cannot provide a complete description of their composition. Therefore, more robust and feasible approaches have to be chosen to elucidate the interactions between environmental and human pressures and phytoplankton assemblages. The Ocean Sampling Day (OSD) allowed collecting seawater samples from a wide range of oceanic regions including the Mediterranean Sea. In this study, a total of 754,167 V4-18S ribosomal DNA (rDNA) metabarcodes derived from 20 plankton samples collected at 19 sampling sites across the coastal areas of the Mediterranean Sea were analyzed to explore the relationships between phytoplankton assemblages' composition, sub-regional environmental features and human pressures...
June 15, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28623288/seabirds-supply-nitrogen-to-reef-building-corals-on-remote-pacific-islets
#9
Anne Lorrain, Fanny Houlbrèque, Francesca Benzoni, Lucie Barjon, Laura Tremblay-Boyer, Christophe Menkes, David P Gillikin, Claude Payri, Hervé Jourdan, Germain Boussarie, Anouk Verheyden, Eric Vidal
Seabirds concentrate nutrients from large marine areas on their nesting islands playing an important ecological role in nutrient transfer between marine and terrestrial ecosystems. Here we investigate the role of guano on corals reefs across scales by analyzing the stable nitrogen isotopic (δ(15)N) values of the scleractinian coral Pocillopora damicornis on fringing reefs around two Pacific remote islets with large seabird colonies. Marine stations closest to the seabird colonies had higher nitrate + nitrite concentrations compared to more distant stations...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28622351/dna-extraction-replicates-improve-diversity-and-compositional-dissimilarity-in-metabarcoding-of-eukaryotes-in-marine-sediments
#10
Anders Lanzén, Katrine Lekang, Inge Jonassen, Eric M Thompson, Christofer Troedsson
Human impact on marine benthic communities has traditionally been assessed using visible morphological traits and has focused on the macrobenthos, whereas the ecologically important organisms of the meio- and microbenthos have received less attention. DNA metabarcoding offers an alternative to this approach and enables a larger fraction of the biodiversity in marine sediments to be monitored in a cost-efficient manner. Although this methodology remains poorly standardised and challenged by biases inherent to rRNA copy number variation, DNA extraction, PCR, and limitations related to taxonomic identification, it has been shown to be semi-quantitative and useful for comparing taxon abundances between samples...
2017: PloS One
https://www.readbyqxmd.com/read/28621725/how-environmental-factors-affect-the-production-of-guanidine-alkaloids-by-the-mediterranean-sponge-crambe-crambe
#11
Eva Ternon, Erica Perino, Renata Manconi, Roberto Pronzato, Olivier P Thomas
Most marine sponges are known to produce a large array of low molecular-weight metabolites which have applications in the pharmaceutical industry. The production of so-called specialized metabolites may be closely related to environmental factors. In this context, assessing the contribution of factors like temperature, nutrients or light to the metabolomes of sponges provides relevant insights into their chemical ecology as well as the supply issue of natural sponge products. The sponge Crambe crambe was chosen as a model due to its high content of specialized metabolites belonging to polycyclic guanidine alkaloids (PGA)...
June 16, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28620858/toxicity-assessment-of-five-emerging-pollutants-alone-and-in-binary-or-ternary-mixtures-towards-three-aquatic-organisms
#12
Carole Di Poi, Katherine Costil, Valérie Bouchart, Marie-Pierre Halm-Lemeille
Despite a growing scientific attention on ecological impact of emerging pollutants (EPs) such as pharmaceuticals, personal care products, and pesticides, knowledge gaps remain regarding mixture toxicity and effects on aquatic organisms. Several EPs were screened in seawater (Normandy, France), and the ecotoxicity of five compounds, chosen on their occurrence in ecosystems and use worldwide, was assessed and were the biocides methylparaben (MP) and triclosan (TCS), a pesticide degradation product (AMPA), and the pharmaceuticals venlafaxine (VEN) and carbamazepine (CBZ)...
June 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28620214/phylogenomic-insight-into-salinispora-bacteria-actinobacteria-species-designations
#13
Natalie Millán-Aguiñaga, Krystle L Chavarria, Juan A Ugalde, Anne-Catrin Letzel, Greg W Rouse, Paul R Jensen
Bacteria represent the most genetically diverse kingdom of life. While great progress has been made in describing this diversity, it remains difficult to identify the phylogenetic and ecological characteristics that delineate groups of bacteria that possess species-like properties. One major challenge associated with species delineations is that not all shared genes have the same evolutionary history, and thus the choice of loci can have a major impact on phylogenetic reconstruction. Sequencing the genomes of large numbers of closely related strains provides new opportunities to distinguish ancestral from acquired alleles and assess the effects of recombination on phylogenetic inference...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620168/dynamics-of-maternally-transferred-trace-elements-in-oyster-larvae-and-latent-growth-effects
#14
Nanyan Weng, Wen-Xiong Wang
Understanding the maternal transfer of contaminants and their potential effects has great implications for a valid ecological assessment of environmental pollution. However, relevant studies on marine bivalves are very limited. Here, we examined the maternal transfer of trace metals in populations of oyster Crassostrea hongkongensis with contrasting metal exposure histories. Elevated accumulation of trace metals was observed in eggs and larvae from contaminated sites, suggesting maternal transfer of multi-metals in natural oyster populations...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28618302/growth-and-physiological-responses-of-a-marine-diatom-phaeodactylum-tricornutum-against-two-imidazolium-based-ionic-liquids-c4mim-bf4-and-c8mim-bf4
#15
Xiang-Yuan Deng, Biao Chen, Da Li, Xiao-Li Hu, Jie Cheng, Kun Gao, Chang-Hai Wang
Ionic liquids (ILs) have been considered as "green" substitutes for traditional organic solvents in many existing biological and chemical areas. However, they have high solubility and poor biodegradability in water, suggesting that they could become persistent chemical pollutants in aquatic environment. The ability of two widely used imidazolium-based ILs to affect the growth and physiological characteristics of a marine diatom (Phaeodactylum tricornutum) was investigated in this study. The diatom was exposed to different concentrations of 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim]BF4) and 1-octyl-3-methylimidazolium tetrafluoroborate ([C8mim]BF4) for 96h within a batch-culture system...
May 31, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28618142/functional-diversity-and-redundancy-across-fish-gut-sediment-and-water-bacterial-communities
#16
Arthur Escalas, Marc Troussellier, Yuan Tong, Thierry Bouvier, Corinne Bouvier, Maud A Mouchet, Domingo Flores Hernandez, Julia Ramos Miranda, Jizhong Zhou, David Mouillot
This paper explores the functional diversity and redundancy in a bacterial metacommunity constituted of three habitats (sediment, water column and fish gut) in a coastal lagoon under anthropogenic pressure. We used comprehensive functional gene arrays covering a wide range of ecological processes and stress resistance genes to estimate the functional potential of bacterial communities. Then, we used diversity partitioning to characterize functional diversity and redundancy within (α), between (β) and across (γ) habitats...
June 15, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28617645/the-implications-of-eco-evolutionary-processes-for-the-emergence-of-marine-plankton-community-biogeography
#17
Boris Sauterey, Ben Ward, Jonathan Rault, Chris Bowler, David Claessen
Models of community assembly have been used to illustrate how the many functionally diverse species that compose plankton food webs can coexist. However, the evolutionary processes leading to the emergence of plankton food webs and their interplay with migratory processes and spatial heterogeneity are yet to be explored. We study the eco-evolutionary dynamics of a modeled plankton community structured in both size and space and physiologically constrained by empirical data. We demonstrate that a complex yet ecologically and evolutionarily stable size-structured food web can emerge from an initial set of two monomorphic phytoplankton and zooplankton populations...
July 2017: American Naturalist
https://www.readbyqxmd.com/read/28616186/at-sea-distribution-and-habitat-use-in-king-penguins-at-sub-antarctic-marion-island
#18
Pierre Pistorius, Mark Hindell, Robert Crawford, Azwianewi Makhado, Bruce Dyer, Ryan Reisinger
King penguins make up the bulk of avian biomass on a number of sub-Antarctic islands where they have a large functional effect on terrestrial and marine ecosystems. The same applies at Marion Island where a substantial proportion of the world population breeds. In spite of their obvious ecological importance, the at-sea distribution and behavior of this population has until recently remained entirely unknown. In addressing this information deficiency, we deployed satellite-linked tracking instruments on 15 adult king penguins over 2 years, April 2008 and 2013, to study their post-guard foraging distribution and habitat preferences...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28616177/the-effects-of-elevated-temperature-and-dissolved-%C3%AF-co2-on-a-marine-foundation-species
#19
Cori J Speights, Brian R Silliman, Michael W McCoy
Understanding how climate change and other environmental stressors will affect species is a fundamental concern of modern ecology. Indeed, numerous studies have documented how climate stressors affect species distributions and population persistence. However, relatively few studies have investigated how multiple climate stressors might affect species. In this study, we investigate the impacts of how two climate change factors affect an important foundation species. Specifically, we tested how ocean acidification from dissolution of CO 2 and increased sea surface temperatures affect multiple characteristics of juvenile eastern oysters (Crassostrea virginica)...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28616174/spatial-overlap-of-shark-nursery-areas-and-the-salmon-farming-industry-influences-the-trophic-ecology-of-squalus-acanthias-on-the-southern-coast-of-chile
#20
Juan Diego Gaitán-Espitia, Daniela Gómez, Alistair J Hobday, Ross Daley, Julio Lamilla, Leyla Cárdenas
Potential interactions between marine predators and humans arise in the southern coast of Chile where predator feeding and reproduction sites overlap with fisheries and aquaculture. Here, we assess the potential effects of intensive salmon aquaculture on food habits, growth, and reproduction of a common predator, the spiny dogfish-identified as Squalus acanthias via genetic barcoding. A total of 102 (89 females and 13 males) individuals were collected during winter and summer of 2013-2014 from the Chiloé Sea where salmon aquaculture activities are concentrated...
June 2017: Ecology and Evolution
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"