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Marine Science

Peter Weißhuhn, Felix Müller, Hubert Wiggering
To safeguard the sustainable use of ecosystems and their services, early detection of potentially damaging changes in functional capabilities is needed. To support a proper ecosystem management, the analysis of an ecosystem's vulnerability provide information on its weaknesses as well as on its capacity to recover after suffering an impact. However, the application of the vulnerability concept to ecosystems is still an emerging topic. After providing background on the vulnerability concept, we summarize existing ecosystem vulnerability research on the basis of a systematic literature review with a special focus on ecosystem type, disciplinary background, and more detailed definition of the ecosystem vulnerability components...
March 14, 2018: Environmental Management
Nastassia V Patin, Zoe A Pratte, Matthew Regensburger, Eric Hall, Kailen Gilde, Alistair D M Dove, Frank J Stewart
Artificial habitats for animals have high commercial and societal value. Microbial communities (microbiomes) in such habitats may play ecological roles similar to those in nature. However, this hypothesis remains largely untested. Georgia Aquarium's Ocean Voyager (OV) exhibit is a closed-system aquatic habitat that mimics the oligotrophic open ocean and houses thousands of large marine animals, including fish, sea turtles, and whale sharks. We present a 14-month time series characterizing the OV water column microbiome...
March 9, 2018: Applied and Environmental Microbiology
Michael G Sorice, C Josh Donlan, Kevin J Boyle, Weibin Xu, Stefan Gelcich
Payments for ecosystem services programs have become common tools but most have failed to achieve wide-ranging conservation outcomes. The capacity for scale and impact increases when PES programs are designed through the lens of the potential participants, yet this has received little attention in research or practice. Our work with small-scale marine fisheries integrates the social science of PES programs and provides a framework for designing programs that focus a priori on scaling. In addition to payments, desirable non-monetary program attributes and ecological feedbacks attract a wider range of potential participants into PES programs, including those who have more negative attitudes and lower trust...
2018: PloS One
Teofil Jesionowski, Małgorzata Norman, Sonia Żółtowska-Aksamitowska, Iaroslav Petrenko, Yvonne Joseph, Hermann Ehrlich
The biosynthesis, chemistry, structural features and functionality of spongin as a halogenated scleroprotein of keratosan demosponges are still paradigms. This review has the principal goal of providing thorough and comprehensive coverage of spongin as a naturally prefabricated 3D biomaterial with multifaceted applications. The history of spongin's discovery and use in the form of commercial sponges, including their marine farming strategies, have been analyzed and are discussed here. Physicochemical and material properties of spongin-based scaffolds are also presented...
March 9, 2018: Marine Drugs
Angela J Dean, Emma K Church, Jenn Loder, Kelly S Fielding, Kerrie A Wilson
Citizen science programs enable community involvement in scientific research. In addition to fostering greater science literacy, some citizen science programs aim to foster engagement in environmental issues. However, few data are available to indicate whether and how citizen science programs can achieve greater environmental engagement. We survey individuals choosing to attend one of seventeen reef citizen science events and examine the extent to which attendees reported three indicators of greater environmental engagement: (i) willingness to share information, (ii) increased support for marine conservation and citizen science, and (iii) intentions to adopt a new behavior...
March 2, 2018: Journal of Environmental Management
Raimundo Gonçalves de Oliveira Júnior, Christiane Adrielly Alves Ferraz, Jackson Roberto Guedes da Silva Almeida, Raphaël Grougnet, Valérie Thiéry, Laurent Picot
PURPOSE: Tumor cells are spontaneously or adaptively resistant to chemotherapeutic drugs, eventually leading to the selection of multiresistant cells responsible for tumor growth and metastasis. Chemosensitization of tumor cells to conventional drugs using non-toxic natural products is a recent and innovative strategy aiming to increase the cytotoxic efficiency of anticancer drugs, limit their toxic side effects and delay the appearance of acquired chemoresistance. This systematic review summarizes data obtained from preclinical studies reporting the use of natural products to sensitize tumor cells to chemotherapeutic agents...
February 21, 2018: Fitoterapia
Philip W Boyd, Sinead Collins, Sam Dupont, Katharina Fabricius, Jean-Pierre Gattuso, Jonathan Havenhand, David A Hutchins, Ulf Riebesell, Max S Rintoul, Marcello Vichi, Haimanti Biswas, Aurea Ciotti, Kunshan Gao, Marion Gehlen, Catriona L Hurd, Haruko Kurihara, Christina M McGraw, Jorge Navarro, Göran E Nilsson, Uta Passow, Hans-Otto Pörtner
Marine life is controlled by multiple physical and chemical drivers and by diverse ecological processes. Many of these oceanic properties are being altered by climate change and other anthropogenic pressures. Hence identifying the influences of multi-faceted ocean change, from local to global scales, is a complex task. To guide policy-making and make projections of the future of the marine biosphere, it is essential to understand biological responses at physiological, evolutionary and ecological levels. Here, we contrast and compare different approaches to multiple driver experiments that aim to elucidate biological responses to a complex matrix of ocean global change...
February 24, 2018: Global Change Biology
P Trocha, M Karpov, D Ganin, M H P Pfeiffer, A Kordts, S Wolf, J Krockenberger, P Marin-Palomo, C Weimann, S Randel, W Freude, T J Kippenberg, C Koos
Light detection and ranging is widely used in science and industry. Over the past decade, optical frequency combs were shown to offer advantages in optical ranging, enabling fast distance acquisition with high accuracy. Driven by emerging high-volume applications such as industrial sensing, drone navigation, or autonomous driving, there is now a growing demand for compact ranging systems. Here, we show that soliton Kerr comb generation in integrated silicon nitride microresonators provides a route to high-performance chip-scale ranging systems...
February 23, 2018: Science
Aurèle Vuillemin, Daniel Ariztegui, Fabian Horn, Jens Kallmeyer, William D Orsi
For decades, microbial community composition in subseafloor sediments has been the focus of extensive studies. In deep lacustrine sediments however, the taxonomic composition of microbial communities remains undercharacterized. Greater knowledge on microbial diversity in lacustrine sediments would improve our understanding of how environmental factors, and resulting selective pressures, shape subsurface biospheres in marine and freshwater sediments. Using high-throughput sequencing of 16S rRNA genes across high resolution climate intervals covering the last 50,000 years in Laguna Potrok Aike, Argentina, we identified changes in microbial populations in response to both past environmental conditions and geochemical changes of the sediment during burial...
February 20, 2018: FEMS Microbiology Ecology
Antje Gimpel, Vanessa Stelzenmüller, Sandra Töpsch, Ibon Galparsoro, Matthew Gubbins, David Miller, Arantza Murillas, Alexander G Murray, Kemal Pınarbaşı, Guillem Roca, Robert Watret
The increasing demand for protein from aquaculture will trigger a global expansion of the sector in coastal and offshore waters. While contributing to food security, potential conflicts with other traditional activities such as fisheries or tourism are inevitable, thus calling for decision-support tools to assess aquaculture planning scenarios in a multi-use context. Here we introduce the AquaSpace tool, one of the first Geographic Information System (GIS)-based planning tools empowering an integrated assessment and mapping of 30 indicators reflecting economic, environmental, inter-sectorial and socio-cultural risks and opportunities for proposed aquaculture systems in a marine environment...
February 18, 2018: Science of the Total Environment
Azam Rezaei Farimani, Mitra Hariri, Mohsen Azimi-Nezhad, Abasalt Borji, Sadegh Zarei, Elham Hooshmand
AIM: N-3 PUFAs can potentially influence levels of inflammatory and non-inflammatory adipokines. Given the contradictory effects of n-3 PUFAs on serum levels of adipokines in type 2 diabetes, we conducted a systematic review and meta-analysis study of randomized placebo-controlled clinical trials that examined the effects of n-3 PUFAs on serum levels of leptin and adiponectin in patients with type 2 diabetes. METHODS: The electronic databases, without regard to language restrictions including PubMed/Medline, Google Scholar, SCOPUS and ISI Web of Science until August 2017, were used to identify randomized controlled trials that assessed the effect of n-3 PUFAs on serum leptin and adiponectin concentrations in type 2 diabetes...
February 16, 2018: Acta Diabetologica
Sonia J Lupien, Robert-Paul Juster, Catherine Raymond, Marie-France Marin
For the last five decades, science has managed to delineate the mechanisms by which stress hormones can impact on the human brain. Receptors for glucocorticoids are found in the hippocampus, amygdala and frontal cortex, three brain regions involved in memory processing and emotional regulation. Studies have shown that chronic exposure to stress is associated with reduced volume of the hippocampus and that chronic stress can modulate volumes of both the amygdala and frontal cortex, suggesting neurotoxic effects of stress hormones on the brain...
February 5, 2018: Frontiers in Neuroendocrinology
Valeria Hidalgo-Ruz, Daniela Honorato-Zimmer, Magdalena Gatta-Rosemary, Paloma Nuñez, Iván A Hinojosa, Martin Thiel
We examined the hypothesis that in an emerging economy such as Chile the abundances of Anthropogenic Marine Debris (AMD) on beaches are increasing over time. The citizen science program Científicos de la Basura ("Litter Scientists") conducted three national surveys (2008, 2012 and 2016) to determine AMD composition, abundance, spatial patterns and temporal trends. AMD was found on all beaches along the entire Chilean coast. Highest percentages of AMD in all surveys were plastics and cigarette butts, which can be attributed to local sources (i...
January 2018: Marine Pollution Bulletin
Gordon B Bonan, Scott C Doney
Many global change stresses on terrestrial and marine ecosystems affect not only ecosystem services that are essential to humankind, but also the trajectory of future climate by altering energy and mass exchanges with the atmosphere. Earth system models, which simulate terrestrial and marine ecosystems and biogeochemical cycles, offer a common framework for ecological research related to climate processes; analyses of vulnerability, impacts, and adaptation; and climate change mitigation. They provide an opportunity to move beyond physical descriptors of atmospheric and oceanic states to societally relevant quantities such as wildfire risk, habitat loss, water availability, and crop, fishery, and timber yields...
February 2, 2018: Science
Sai Das, Soumen K Maiti
One of the pertinent issues in the field of energy science today is the quest for an abundant source of hydrogen or hydrogen equivalents. In this study, phenyl-p-benzoquinone (pPBQ) has been used to generate a molecular store of hydrogen equivalents (phenyl-p-hydroquinone; pPBQH2) from thein vivo splitting of water by photosystem II of the marine cyanobacterium Synechococcus elongatus BDU 70542. Using this technique, 10.8 μmol of pPBQH2 per mg chlorophyll a can be extracted per minute, an efficiency that is orders of magnitude higher when compared to the techniques present in the current literature...
February 3, 2018: Journal of Photochemistry and Photobiology. B, Biology
Juliet M Wong, Kevin M Johnson, Morgan W Kelly, Gretchen E Hofmann
Understanding the mechanisms with which organisms can respond to a rapidly changing ocean is an important research priority in marine sciences, especially in light of recent predictions regarding the pace of ocean change in the coming decades. Transgenerational effects, in which the experience of the parental generation can shape the phenotype of their offspring, may serve as such a mechanism. In this study, adult purple sea urchins, Strongylocentrotus purpuratus, were conditioned to regionally and ecologically relevant pCO2 levels and temperatures representative of upwelling (low temperature, high pCO2 ) and non-upwelling (average temperature, low pCO2 ) conditions typical of coastal upwelling regions in the California Current System...
February 7, 2018: Molecular Ecology
John T Trochta, Maite Pons, Merrill B Rudd, Melissa Krigbaum, Alexander Tanz, Ray Hilborn
Ecosystem-based fisheries management (EBFM) was developed to move beyond single species management by incorporating ecosystem considerations for the sustainable utilization of marine resources. Due to the wide range of fishery characteristics, including different goals of fisheries management across regions and species, theoretical best practices for EBFM vary greatly. Here we highlight the lack of consensus in the interpretation of EBFM amongst professionals in marine science and its implementation. Fisheries policy-makers and managers, stock assessment scientists, conservationists, and ecologists had very different opinions on the degree to which certain management strategies would be considered EBFM...
2018: PloS One
Terri Marin, Blair DeRossett, Jatinder Bhatia
Acute kidney injury (AKI) occurs in approximately 30% of all infants hospitalized in the neonatal intensive care unit. About 40% of very low-birth-weight infants develop AKI, with an estimated mortality rate of 50% to 80%. Very low-birth-weight survivors have twice the risk of developing chronic renal disease later in life compared with their term counterparts. Current diagnostic modalities for AKI include serum creatinine and urine output; however, recent studies suggest that these measures are imprecise, as they may not change until 25% to 50% of renal function is lost...
January 29, 2018: Journal of Perinatal & Neonatal Nursing
Jordan Lock, Chris Bearman
Objective The objective of this paper is to examine quotation error in human factors. Background Science progresses through building on the work of previous research. This requires accurate quotation. Quotation error has a number of adverse consequences: loss of credibility, loss of confidence in the journal, and a flawed basis for academic debate and scientific progress. Quotation error has been observed in a number of domains, including marine biology and medicine, but there has been little or no previous study of this form of error in human factors, a domain that specializes in the causes and management of error...
January 1, 2018: Human Factors
Qi Wang, Qian Zhou, Qicheng Zhang, Rongjia Shi, Shangshang Ma, Wenbo Zhao, Min Zhou
Preparation of high performance electrochemical biosensing interface for the sensitive and rapid detection of human metabolites is of great interest for health care and biomedical science. In this paper, based on the adhesion technique of marine mussels, we designed and prepared a novel biosensor with a micro/nano-biointerface of Fe3O4-Mn3(PO3)2@Ni foam, which offered a three dimensional (3D) living environment for real cell. The constructed biosensor with a 3D micro/nano-biointerface of Fe3O4-Mn3(PO3)2@Ni foam was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and elemental mapping...
March 1, 2018: Talanta
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