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https://www.readbyqxmd.com/read/28735436/assessing-differences-in-macrofaunal-assemblages-as-a-factor-of-sieve-mesh-size-distance-between-samples-and-time-of-sampling
#1
Lenaïg G Hemery, Kristin K Politano, Sarah K Henkel
With increasing cascading effects of climate change on the marine environment, as well as pollution and anthropogenic utilization of the seafloor, there is increasing interest in tracking changes to benthic communities. Macrofaunal surveys are traditionally conducted as part of pre-incident environmental assessment studies and post-incident monitoring studies when there is a potential impact to the seafloor. These surveys usually characterize the structure and/or spatiotemporal distribution of macrofaunal assemblages collected with sediment cores; however, many different sampling protocols have been used...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28734980/histone-demethylase-phf8-regulates-hypoxia-signaling-through-hif1%C3%AE-and-h3k4me3
#2
Peterson Kariuki Maina, Peng Shao, Xiongfei Jia, Qi Liu, Shaikamjad Umesalma, Maximo Marin, Donald Long, Samantha Concepción-Román, Hank Heng Qi
Hypoxia through transcription factor HIF1α plays a critical role in cancer development. In prostate cancer, HIF1α interplays with androgen receptor (AR) to contribute to the progression of this disease to its lethal form-castration-resistant prostate cancer (CRPC). Hypoxia upregulates several epigenetic factors including histone demethylase KDM3A which is a critical co-factor of HIF1α. However, how histone demethylases regulate hypoxia signaling is not fully understood. Here, we report that histone demethylase PHF8 plays an essential role in hypoxia signaling...
July 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28734968/identification-of-an-mitf-gene-and-its-polymorphisms-associated-with-the-vibrio-resistance-trait-in-the-clam-meretrix-petechialis
#3
Shujing Zhang, Xin Yue, Fengjuan Jiang, Hongxia Wang, Baozhong Liu
Microphthalmia-associated transcription factor (MITF) regulates the transcription of its target genes by binding to their promoters. In this study, an MITF gene, MpMITF was identified in the clam Meretrix petechialis. The full-length cDNA of MpMITF is 3564 bp with an ORF of 1365 bp. The deduced amino acid sequence consists of a conserved functional structure of bHLH-LZ, which could bind with E-box. The mRNA and protein expression levels of MpMITF were significantly up-regulated 6 h post-Vibrio injection. The mRNA expression of MpMITF increased on day 2 and peaked on day 10 post-Vibrio immersion...
July 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28734738/evaluation-of-the-biotechnological-potential-of-bacterioplankton-from-niter%C3%A3-i-coast-rj
#4
Marcelly Miranda Aybal Jayme, Rebeca Oliveira Castro, Carlos André Mandarino Silva, Mariana Muniz Silva, Flávia Lima do Carmo, Fábio Vieira de Araujo
Production of antibiotics and enzymes by microorganisms is well recognized for its economic benefits. Searching potentially exploitable microorganisms, strains of heterotrophic bacteria were isolated from marine and estuarine waters in Niterói-RJ, Brazil, and tested for the production of enzymes and antimicrobial substances. From the 76 isolated colonies, 09.21% showed antimicrobial potential, 63.16% showed enzymatic activity for at least one of the substrates tested and 91% showed multidrug resistance. Strains that presented the better results were identified by sequencing...
July 19, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/28734733/diatom-frustule-morphogenesis-and-function-a-multidisciplinary-survey
#5
REVIEW
Edoardo De Tommasi, Johan Gielis, Alessandra Rogato
Diatoms represent the major component of phytoplankton and are responsible for about 20-25% of global primary production. Hundreds of millions of years of evolution led to tens of thousands of species differing in dimensions and morphologies. In particular, diatom porous silica cell walls, the frustules, are characterized by an extraordinary, species-specific diversity. It is of great interest, among the marine biologists and geneticists community, to shed light on the origin and evolutionary advantage of this variability of dimensions, geometries and pore distributions...
July 19, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28734570/spatial-and-temporal-variations-of-heavy-metals-in-marine-sediments-from-liaodong-bay-bohai-sea-in-china
#6
Liang Liu, Lijun Wang, Zhengxian Yang, Yingying Hu, Minghui Ma
An integrated analysis has been carried out using surface sediment monitoring data in order to characterize the spatial distributions and temporal trends of heavy metals within ten years from 2004 to 2013 in the entire Liaodong Bay. Hg, Cd and As were predominant contaminants with their median concentrations of 0.04-0.15, 0.01-0.65, and 1.80-30.3mg/kg respectively. Both areas and levels of Cu and Pb contamination were low. Cd contents exhibited an obvious decreasing trend and As presented a similar law during these 10years...
July 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28734264/a-small-scale-portable-method-for-extracting-microplastics-from-marine-sediments
#7
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/28734261/abundant-plankton-sized-microplastic-particles-in-shelf-waters-of-the-northern-gulf-of-mexico
#8
Rosana Di Mauro, Matthew J Kupchik, Mark C Benfield
Accumulation of marine debris is a global problem that affects the oceans on multiple scales. The majority of floating marine debris is composed of microplastics: plastic particles up to 5 mm in diameter. With similar sizes and appearances to natural food items, these small fragments pose potential risks to many marine organisms including zooplankton and zooplanktivores. Semi-enclosed seas are reported to have high concentrations of microplastics, however, the distribution and concentration of microplastics in one such system, the Gulf of Mexico, remains unknown...
July 19, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28734216/releasing-of-hexabromocyclododecanes-from-expanded-polystyrenes-in-seawater-field-and-laboratory-experiments
#9
Manviri Rani, Won Joon Shim, Mi Jang, Gi Myung Han, Sang Hee Hong
Expanded polystyrene (EPS) is a major component of marine debris globally. Recently, hazardous hexabromocyclododecanes (HBCDDs) were detected in EPS buoys used for aquaculture farming. Subsequently, enrichment of HBCDDs was found in nearby marine sediments and mussels growing on EPS buoys. It was suspected that EPS buoys and their debris might be sources of HBCDDs. To confirm this, the release of HBCDDs from EPS spherules detached from a buoy to seawater was investigated under field (open sea surface and closed outdoor chambers with sun exposure and in the dark) and laboratory (particle-size) conditions...
July 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28734075/high-occurrence-of-jellyfish-predation-by-black-browed-and-campbell-albatross-identified-by-dna-metabarcoding
#10
Julie C McInnes, Rachael Alderman, Mary-Anne Lea, Ben Raymond, Bruce E Deagle, Richard A Phillips, Andrew Stanworth, David R Thompson, Paulo Catry, Henri Weimerskirch, Cristián G Suazo, Michaël Gras, Simon N Jarman
Gelatinous zooplankton are a large component of the animal biomass in all marine environments, but are considered to be uncommon in the diet of most marine top predators. However, the diets of key predator groups like seabirds have conventionally been assessed from stomach content analyses, which cannot detect most gelatinous prey. As marine top predators are used to identify changes in the overall species composition of marine ecosystems, such biases in dietary assessment may impact our detection of important ecosystem regime shifts...
July 22, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28733994/seasonal-recruitment-and-survival-strategies-of-palisada-cervicornis-comb-nov-ceramiales-rhodophyta-in-coral-reefs
#11
Ligia Collado-Vides, Alain Duran, Elizabeth Armenis, Valéria Cassano, Deron Burkepile, Andrew A Shantz, Laura Palma, Jhoana Díaz-Larrea, Abel Sentíes, Mutue Toyota Fujii
As marine tropical ecosystems deteriorate and lose biodiversity, their communities are shifting to being dominated by a few species, altering ecosystem's functioning and services. Macroalgae are becoming dominant on coral reefs, and are frequently observed outcompeting corals. Turf algal assemblages are the base of energy flow in these systems and one of the most abundant types of macroalgae on coral reefs, but little is known about their biology and diversity. Through molecular and morphological analyses, we identified the turf-forming species Laurencia cervicornis, and by studying seasonal recruitment and the impact of herbivorous fishes on its abundance, we describe its survival strategy...
July 22, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28733819/estimating-environmental-value-losses-from-earth-materials-excavation-and-infilling-for-large-scale-airport-construction-a-case-of-dalian-offshore-airport-dalian-china
#12
Hua-Kun Yan, Nuo Wang, Nuan Wu, Nan-Qi Song, Dao-Li Zhu
Large-scale airport construction removes large quantities of earth materials, resulting in serious environmental pollution and ecosystem damage. However, studies of environmental concerns caused by the materials used in airport construction are still preliminary, and those case studies on the impacts of large-scale offshore airport development are very limited. China's Dalian Offshore Airport is considered here to study the environmental value loss from 240 million m(3) of materials excavations and 21 km(2) of artificial island infillings...
July 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28733703/induction-of-accelerated-senescence-by-the-microtubule-stabilizing-agent-peloruside-a
#13
Ariane Chan, Connie Gilfillan, Nikki Templeton, Ian Paterson, Peter T Northcote, John H Miller
Chemotherapeutic agents can induce accelerated senescence in tumor cells, an irreversible state of cell cycle arrest. Paclitaxel, a microtubule-stabilizing agent used to treat solid tumors of the breast, ovary, and lung and discodermolide, another stabilizing agent from a marine sponge, induce senescence in cultured cancer cells. The aim of this study was to determine if the microtubule-stabilizing agent peloruside A, a polyketide natural product from a marine sponge, can induce accelerated senescence in a breast cancer cell line MCF7...
July 22, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28733603/sediment-transport-drives-tidewater-glacier-periodicity
#14
Douglas Brinkerhoff, Martin Truffer, Andy Aschwanden
Most of Earth's glaciers are retreating, but some tidewater glaciers are advancing despite increasing temperatures and contrary to their neighbors. This can be explained by the coupling of ice and sediment dynamics: a shoal forms at the glacier terminus, reducing ice discharge and causing advance towards an unstable configuration followed by abrupt retreat, in a process known as the tidewater glacier cycle. Here we use a numerical model calibrated with observations to show that interactions between ice flow, glacial erosion, and sediment transport drive these cycles, which occur independent of climate variations...
July 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28733281/structural-and-mechanistic-insights-into-the-improvement-of-halotolerant-ability-of-a-marine-microbial-esterase-by-increasing-intra-and-inter-domain-hydrophobic-interactions
#15
Ping-Yi Li, Yi Zhang, Bin-Bin Xie, Yan-Qi Zhang, Jie Hao, Yue Wang, Peng Wang, Chun-Yang Li, Qi-Long Qin, Xi-Ying Zhang, Hai-Nan Su, Mei Shi, Yu-Zhong Zhang, Xiu-Lan Chen
Halotolerant enzymes are beneficial for industrial processes requiring high salts and low water activity. Most halophilic proteins are evolved to have reduced hydrophobic interactions on the surface and in the hydrophobic cores for their haloadaptation. However, in this study, we improved the halotolerance of a thermolablie esterase, E40, by increasing intra-protein hydrophobic interactions. E40 was quite unstable in buffers containing more than 0.3 M NaCl and its kcat and substrate affinity were both significantly reduced in 0...
July 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28733166/right-paracardiac-cystic-lymphatic-malformation
#16
María Arántzazu González Marín, Javier Jiménez Díaz, Juan Carlos López Gutiérrez
No abstract text is available yet for this article.
July 18, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28733047/idiopathic-granulomatous-mastitis-a-rare-benign-entitiy-that-can-simulate-breast-cancer
#17
Caridad Marín Hernández, Antonio Piñero Madrona, Pedro José Gil Vázquez, Pedro José Galindo Fernández, Pascual Parrilla Paricio
No abstract text is available yet for this article.
July 18, 2017: Cirugía Española
https://www.readbyqxmd.com/read/28732330/legacy-persistent-organic-pollutants-including-pbdes-in-the-trophic-web-of-the-ross-sea-antarctica
#18
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/28732297/influence-of-environmental-conditions-on-the-toxicokinetics-of-cadmium-in-the-marine-copepod-acartia-tonsa
#19
Maria D Pavlaki, Rui G Morgado, Cornelis A M van Gestel, Ricardo Calado, Amadeu M V M Soares, Susana Loureiro
mMarine and estuarine ecosystems are highly productive areas that often act as a final sink for several pollutants, such as cadmium. Environmental conditions in these habitats can affect metal speciation, as well as its uptake and depuration by living organisms. The aim of this study was to assess cadmium uptake and depuration rates in the euryhaline calanoid copepod Acartia tonsa under different pH, salinity and temperature conditions. Cadmium speciation did not vary with changing pH or temperature, but varied with salinity...
July 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28732168/inland-sea-spray-aerosol-transport-and-incomplete-chloride-depletion-varying-degrees-of-reactive-processing-observed-during-soas
#20
Amy Lynne Bondy, Bingbing Wang, Alexander Laskin, Rebecca Lynn Craig, Manelisi Victor Nhliziyo, Steven Bertman, Kerri A Pratt, Paul B Shepson, Andrew P Ault
Multiphase reactions involving sea spray aerosol (SSA) impact trace gas budgets in coastal regions by acting as a reservoir for oxidized nitrogen and sulfur species, as well as a source of halogen gases (HCl, ClNO2, etc.). While most studies of multiphase reactions on SSA have focused on marine environments, far less is known about SSA transported inland. Herein, single particle measurements of SSA are reported at a site > 320 km from the Gulf of Mexico, with transport times of 7-68 h. Samples were collected during the Southern Oxidant and Aerosol Study (SOAS) in June-July 2013 near Centreville, Alabama...
July 21, 2017: Environmental Science & Technology
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