Recent Publications

Weekly Highlighted Publication

Martian magmatism from plume metasomatized mantle

Impact:
The distinctive nature of martian meteorites to remotely sensed martian surface samples, in particular the higher alkali contents of some Gusev and Gale crater samples, possibly implies that alkali volcanism on Mars is driven by low-degree partial melting from metasomatism of martian lithosphere in response to mantle plume impingement, offering a mechanism for explaining the apparent differences observed between meteorites and mission data for Mars.

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  • Hondula DM, Balling RC, Vanos JK, Georgescu M.  2015.  Rising Temperatures, Human Health, and the Role of Adaptation. 1:144-154.
    Abstract Summary:

    There is near consensus in the scientific community that humans will experience higher future temperatures due to the ongoing accumulation of greenhouse gases in the atmosphere. The human response to this climatic change, particularly if accompanied by a surge in extreme heat events, is a key topic being addressed by scientists across many disciplines. In this article, we review recent (2012–2015) research on human health impacts of observed...

  • Allemann MN, Shulse CN, Allen EE.  2019.  Linkage of marine bacterial polyunsaturated fatty acid and long-chain hydrocarbon biosynthesis. Frontiers in Microbiology. 10
    Abstract Summary:

    Various marine gamma-proteobacteria produce omega-3 polyunsaturated fatty acids, such as eicosapentaenoic acid (20:5, EPA) and docosahexaenoic acid (22:6, DHA), which are incorporated into membrane phospholipids. Five genes, designated pfaABCDE, encode the polyketide/fatty acid synthase necessary for production of these long-chain fatty acids. In addition to de novo biosynthesis of EPA and DHA, the “Pfa synthase” is also involved with...

  • Harada A.E, Burton RS.  2019.  Ecologically relevant temperature ramping rates enhance the protective heat shock response in an intertidal ectotherm. Physiological and Biochemical Zoology. 92:152-162.
    Abstract Summary:

    Thermal stress experiments are essential for understanding organisms' thermal limits and the physiological processes that contribute to establishing those limits. Experiments typically employ either an abrupt transfer to near-lethal temperatures or a gradually increasing thermal exposure. In the current study, we used three populations of the intertidal copepod Tigriopus californicus that are known to differ in upper thermal tolerance to...

  • Cakmak S., Hebbern C., Vanos J., Crouse D.L, Tjepkema M..  2019.  Exposure to traffic and mortality risk in the 1991-2011 Canadian Census Health and Environment Cohort (CanCHEC). Environment International. 124:16-24.
    Abstract Summary:

    There is evidence that local traffic density and living near major roads can adversely affect health outcomes. We aimed to assess the relationship between local road length, proximity to primary highways, and cause-specific mortality in the 1991 Canadian Census Health and Environment Cohort (CanCHEC). In this long-term study of 2.6 million people, based on completion of the long-form census in 1991 and followed until 2011, we used annual...

  • Abstract Summary:

    Marine microorganisms are receiving more attention as a promising potential source of new natural products. In the present study, we performed genomic and metabolomic analyses to explore the metabolic potential of the obligate marine actinomycete genus Salinispora. The genomes of thirty Salinispora strains were prospected in search of biosynthetic gene clusters including polyketide synthase (PKS), nonribosomal peptide synthetase (NPRS),...

  • Wiedensohler A., Ma N., Birmili W., Heintzenberg J., Ditas F., Andreae M.O, Panov A..  2019.  Infrequent new particle formation over the remote boreal forest of Siberia. Atmospheric Environment. 200:167-169.
    Abstract Summary:

    Aerosol particle number size distributions (PNSD) were investigated to verify, if extremely low-volatility organic vapors (ELVOC) from natural sources alone could induce new particle formation and growth events over the remote boreal forest region of Siberia, hundreds of kilometers away from significant anthropogenic sources. We re-evaluated observations determined at a height of 300 m of the remote observatory ZOTTO (Zotino Tall Tower...

  • Zhou ZQ, Zhang R.H, Xie SP.  2019.  Interannual variability of summer surface air temperature over central India: Implications for monsoon onset. Journal of Climate. 32:1693-1706.
    Abstract Summary:

    Year-to-year variability of surface air temperature (SAT) over central India is most pronounced in June. Climatologically over central India, SAT peaks in May, and the transition from the hot premonsoon to the cooler monsoon period takes place around 9 June, associated with the northeastward propagation of intraseasonal convective anomalies from the western equatorial Indian Ocean. Positive (negative) SAT anomalies during June correspond to a...

  • Hou X.M, Wang C.Y, Gerwick WH, Shao C.L.  2019.  Marine natural products as potential anti-tubercular agents. 165:273-292.
    Abstract Summary:

    Tuberculosis has been one of the greatest global health challenges of all time. Although the current first-line anti-tuberculosis (anti-TB) medicines used in the clinic have reduced mortality, multidrug-resistance and extensively drug-resistance forms of the disease have now spread worldwide and become a global problem. Even so, few new clinically approved drugs have emerged during the past 30 years. Highly biodiverse marine organisms have...

  • Vanos J.K, Kosaka E., Iida A., Yokohari M., Middel A., Scott-Fleming J., Brown R.D.  2019.  Planning for spectator thermal comfort and health in the face of extreme heat: The Tokyo 2020 Olympic marathons. Science of the Total Environment. 657:904-917.
    Abstract Summary:

    The 2020 Olympic Games marathon will be run through the streets of Tokyo on the mornings of August 2nd and 9th, a time of year that is typically hot, sunny, and humid. Few studies have assessed the potential impact of extreme heat along the marathon course to understand the multiple factors (e.g., radiation, wind flow) affecting human thermal comfort (TC) as influenced by urban design and vegetation. The current research establishes a...

  • Korte M., Brown M.C, Gunnarson S.R, Nilsson A, Panovska S., Wardinski I., Constable C.G.  2019.  Refining Holocene geochronologies using palaeomagnetic records. Quaternary Geochronology. 50:47-74.
    Abstract Summary:

    The aperiodic nature of geomagnetic field variations, both in intensity and direction, can aid in dating archaeological artefacts, volcanic rocks, and sediment records that carry a palaeomagnetic signal. The success of palaeomagnetic dating relies upon our knowledge of past field variations at specific locations. Regional archaeo- and palaeomagnetic reference curves and predictions from global geomagnetic field models provide our best...

  • Marcuson R., Gee J., Wei E., Driscoll N..  2019.  A 2000 year geomagnetic field record from the Gulf of Papua. Marine Geology. 408:48-66.
    Abstract Summary:

    A high resolution Holocene record of geomagnetic field direction and intensity in the Gulf of Papua was constructed using paleomagnetic data from eight piston cores collected in the region. The chronology of the cores was based largely on radiocarbon dates from benthic foraminifera. Correlation of seismic reflectors imaged in subbottom data between nearby cores was consistent with the chronostratigraphic framework based on radiocarbon dates...

  • Hammons J.C, Trzoss L., Jimenez P.C, Hirata A.S, Costa-Lotufo L.V, La Clair J.J, Fenical W.  2019.  Advance of seriniquinone analogues as melanoma agents. 10:186-190.
    Abstract Summary:

    Seriniquinone, a marine natural product, displayed potent cytotoxicity and selectivity against melanoma cancer cells. This selectivity, combined with a novel mode of action (MOA), prompted studies to translate a pharmacologically relevant lead. Herein, we report on structure-activity relationships (SARs), and provide a strategy to prepare analogues that retain activity and offer an improved water solubility and isomeric purity. From...

  • Dayton PK, Oliver JS, Thrush S.F, Hammerstrom K.  2019.  Bacteria defend carrion from scavengers. Antarctic Science. 31:13-15.
    Abstract Summary:

    Carrion in the form of dead seal pups and algal mats placed on soft bottom habitats at Explorers Cove and Salmon Bay, McMurdo Sound, attract scavenging invertebrates that are driven away by hydrogen sulphide produced by sulphate-reducing bacteria sequestered below a layer of Beggiatoa/Thioploca-like filamentous bacteria. This system is usually found for lipid-rich marine mammal carrion, but also occurred with natural algal mats.


  • Chen S.J, Russell LM, Cappa CD, Zhang X.L, Kleeman M.J, Kumar A., Liu D., Ramanathana V..  2019.  Comparing black and brown carbon absorption from AERONET and surface measurements at wintertime Fresno. Atmospheric Environment. 199:164-176.
    Abstract Summary:

    The radiative impacts of black carbon (BC) and brown carbon (BrC) are widely recognized but remain highly uncertain. The Aerosol Robotic Network (AERONET) provides measurements of aerosol optical depth (AOD), aerosol absorption optical depth (AAOD), and other parameters. AERONET AAOD measurements have been used to estimate the relative contributions of BC and BrC to the total absorption at select sites and have the potential to be used across...

  • Eisenhofer R., Minich J.J, Marotz C., Cooper A., Knight R., Weyrich L.S.  2019.  Contamination in low microbial biomass microbiome studies: Issues and recommendations. Trends in Microbiology. 27:105-117.
    Abstract Summary:

    Next-generation sequencing approaches in microbiome research have allowed surveys of microbial communities, their genomes, and their functions with higher sensitivity than ever before. However, this sensitivity is a double-edged sword because these tools also efficiently detect contaminant DNA and cross-contamination, which can confound the interpretation of microbiome data. Therefore, there is an urgent need to integrate key controls into...

  • Yarimizu K., Cruz-Lopez R., Garcia-Mendoza E., Edwards M., Carter ML, Carrano C.J.  2019.  Distribution of dissolved iron and bacteria producing the photoactive siderophore, vibrioferrin, in waters off Southern California and Northern Baja. 32:139-154.
    Abstract Summary:

    Phytoplankton blooms can cause acute effects on marine ecosystems due either to their production of endogenous toxins or to their enormous biomass leading to major impacts on local economies and public health. Despite years of effort, the causes of these Harmful Algal Blooms are still not fully understood. Our hypothesis is that bacteria that produce photoactive siderophores may provide a bioavailable source of iron for phytoplankton which...

  • Dhaneesha M., Hasin O., Sivakumar K.C, Ravinesh R., Naman C.B, Carmeli S., Sajeevan T.P.  2019.  DNA binding and molecular dynamic studies of polycyclic tetramate macrolactams (PTM) with potential anticancer activity isolated from a sponge-associated Streptomyces zhaozhouensis subsp. mycale subsp. nov. Marine Biotechnology. 21:124-137.
    Abstract Summary:

    A sponge-associated actinomycete (strain MCCB267) was isolated from a marine sponge Mycale sp. collected in the Indian Ocean off the Southeast coast of India. Phylogenetic studies of this strain using 16S rRNA gene sequencing showed high sequence similarity to Streptomyces zhaozhouensis. However, strain MCCB267 showed distinct physiological and biochemical characteristic features and was thus designated as S. zhaozhouensis subsp. mycale....

  • Murik O., Tirichine L., Prihoda J., Thomas Y., Araujo W.L, Allen A.E, Fernie A.R, Bowler C..  2019.  Downregulation of mitochondrial alternative oxidase affects chloroplast function, redox status and stress response in a marine diatom. New Phytologist. 221:1303-1316.
    Abstract Summary:

    Diatom dominance in contemporary aquatic environments indicates that they have developed unique and effective mechanisms to cope with the rapid and considerable fluctuations that characterize these environments. In view of their evolutionary history from a secondary endosymbiosis, inter-organellar regulation of biochemical activities may be of particular relevance. Diatom mitochondrial alternative oxidase (AOX) is believed to play a...

  • Wang H, Xie SP, Kosaka Y, Liu QY, Du Y..  2019.  Dynamics of Asian summer monsoon response to anthropogenic aerosol forcing. Journal of Climate. 32:843-858.
    Abstract Summary:

    Anthropogenic aerosols partially mask the greenhouse warming and cause the reduction in Asian summer monsoon precipitation and circulation. By decomposing the atmospheric change into the direct atmospheric response to radiative forcing and sea surface temperature (SST)-mediated change, the physical mechanisms for anthropogenic-aerosol-induced changes in the East Asian summer monsoon (EASM) and South Asian summer monsoon (SASM) are diagnosed....

  • Mullineaux L.S, Metaxas A., Beaulieu S.E, Bright M., Gollner S., Grupe B.M, Herrera S., Kellner J.B, Levin L.A, Mitarai S. et al..  2018.  Exploring the ecology of deep-sea hydrothermal vents in a metacommunity framework. Frontiers in Marine Science. 5
    Abstract Summary:

    Species inhabiting deep-sea hydrothermal vents are strongly influenced by the geological setting, as it provides the chemical-rich fluids supporting the food web, creates the patchwork of seafloor habitat, and generates catastrophic disturbances that can eradicate entire communities. The patches of vent habitat host a network of communities (a metacommunity) connected by dispersal of planktonic larvae. The dynamics of the metacommunity are...

  • Abstract Summary:

    The total synthesis of majusculamide D (MJS-D) is described, a lipopentapeptide originally isolated from Lyngbya majuscula and reisolated from a Moorea sp. MJS-D possesses selective and potent cancer cell toxicity. A scalable and convergent strategy with a minimal number of purifications produced significant quantities of MJM-D for in vivo evaluations. The absolute configuration of the 1,3-dimethyl-octanamide motif was determined by synthesis...

  • Abstract Summary:

    Sequential enzymatic reactions on substrates tethered to carrier proteins (CPs) generate thiotemplated building blocks that are then delivered to nonribosomal peptide synthetases (NRPSs) to generate peptidic natural products. The underlying diversity of these thiotemplated building blocks is the principal driver of the chemical diversity of NRPS-derived natural products. Structural insights into recognition of CPs by tailoring enzymes that...

  • Kuriyama P.T, Branch T.A, Hicks A.C, Harms J.H, Hamel O.S.  2019.  Investigating three sources of bias in hook-and-line surveys: survey design, gear saturation, and multispecies interactions. Canadian Journal of Fisheries and Aquatic Sciences. 76:192-207.
    Abstract Summary:

    Hook-and-line surveys can be used to estimate population trends in fish species where conventional methods such as trawl, acoustic, visual, or pot surveys cannot be applied. Hook-and-line surveys allow for the collection of biological information, but the resultant indices of abundance may be biased. We designed simulations to address concerns around survey design, hook saturation, and competition among species and found that catch per unit...

  • Cappa CD, Zhang X.L, Russell LM, Collier S., Lee A.KY, Chen C.L, Betha R., Chen S.J, Liu J., Price D.J et al..  2019.  Light absorption by ambient black and brown carbon and its dependence on black carbon coating state for two California, USA, cities in winter and summer. Journal of Geophysical Research-Atmospheres. 124:1550-1577.
    Abstract Summary:

    Observations from a wintertime and summertime field campaign are used to assess the relationship between black and brown carbon (BC and BrC, respectively) optical properties and particle composition and coating state. The wintertime campaign, in Fresno, CA, was impacted by primary emissions from residential wood burning, secondary organic and inorganic particle formation, and BC from motor vehicles. Two major types of BrC were observed in...

  • Olofsson M., Torstensson A., Karlberg M., Steinhoff F.S, Dinasquet J., Riemann L., Chierici M., Wulff A..  2019.  Limited response of a spring bloom community inoculated with filamentous cyanobacteria to elevated temperature and pCO(2). Botanica Marina. 62:3-16.
    Abstract Summary:

    Temperature and CO2 levels are projected to increase in the future, with consequences for carbon and nutrient cycling in brackish environments, such as the Baltic Sea. Moreover, filamentous cyanobacteria are predicted to be favored over other phytoplankton groups under these conditions. Under a 12-day outdoor experiment, we examined the effect on a natural phytoplankton spring bloom community of elevated temperature (from 1 degrees C to 4...

  • Scott R.C, Nicolas J.P, Bromwich D.H, Norris J.R, Lubin D..  2019.  Meteorological drivers and large-scale climate forcing of West Antarctic Surface Melt. Journal of Climate. 32:665-684.
    Abstract Summary:

    Understanding the drivers of surface melting in West Antarctica is crucial for understanding future ice loss and global sea level rise. This study identifies atmospheric drivers of surface melt on West Antarctic ice shelves and ice sheet margins and relationships with tropical Pacific and high-latitude climate forcing using multidecadal reanalysis and satellite datasets. Physical drivers of ice melt are diagnosed by comparing satellite-...

  • Abstract Summary:

    Temperature and light are fundamental environmental variables which regulate phytoplankton growth rates when nutrients are in excess. For polar coastal oceans that are undergoing changes in sea ice cover and warming, light, and temperature are particularly important for bloom dynamics. Using colonial Phaeocystis antarctica cultures grown at steady-state, we assessed the combined effect of these two environmental controls on net growth rate (...

  • Abstract Summary:

    The development of osmoregulatory and gas exchange organs was studied in larval yellowfin tuna (Thunnus albacares) from 2 to 25 days post-hatching (2.9-24.5mm standard length, SL). Cutaneous and branchial ionocytes were identified using Na+/K+-ATPase immunostaining and scanning electron microscopy. Cutaneous ionocyte abundance significantly increased with SL, but a reduction in ionocyte size and density resulted in asignificant decrease in...

  • B. Pan J, Vernet M, Reynolds RA, B. Mitchell G.  2019.  The optical and biological properties of glacial meltwater in an Antarctic fjord. Plos One. 14
    Abstract Summary:

    As the Western Antarctic Peninsula (WAP) region responds to a warmer climate, the impacts of glacial meltwater on the Southern Ocean are expected to intensify. The Antarctic Peninsula fjord system offers an ideal system to understand meltwater’s properties, providing an extreme in the meltwater’s spatial gradient from the glacio-marine boundary to the WAP continental shelf. Glacial meltwater discharge in Arctic and Greenland fjords is...

  • Fang X.K, Park S., Saito T., Tunnicliffe R., Ganesan A.L, Rigby M, Li S.L, Yokouchi Y., Fraser PJ, Harth CM et al..  2019.  Rapid increase in ozone-depleting chloroform emissions from China. Nature Geoscience. 12:89-+.
    Abstract Summary:

    Chloroform contributes to the depletion of the stratospheric ozone layer. However, due to its short lifetime and predominantly natural sources, it is not included in the Montreal Protocol that regulates the production and uses of ozone-depleting substances. Atmospheric chloroform mole fractions were relatively stable or slowly decreased during 1990-2010. Here we show that global chloroform mole fractions increased after 2010, based on in situ...

  • Bradley J.M, Svistunenko D.A, Pullin J., Hill N., Stuart RK, Palenik B, Wilson M.T, Hemmings A.M, Moore G.R, Le Brun N.E.  2019.  Reaction of O-2 with a diiron protein generates a mixed-valent Fe2+/Fe3+ center and peroxide. Proceedings of the National Academy of Sciences of the United States of America. 116:2058-2067.
    Abstract Summary:

    The gene encoding the cyanobacterial ferritin SynFtn is up-regulated in response to copper stress. Here, we show that, while SynFtn does not interact directly with copper, it is highly unusual in several ways. First, its catalytic diiron ferroxidase center is unlike those of all other characterized prokaryotic ferritins and instead resembles an animal H-chain ferritin center. Second, as demonstrated by kinetic, spectro-scopic, and high-...

  • Crosby S.C, Kumar N., O'Reilly W.C, Guza RT.  2019.  Regional swell transformation by backward ray tracing and SWAN. Journal of Atmospheric and Oceanic Technology. 36:217-229.
    Abstract Summary:

    Beach erosion and wave-induced flooding models are often initialized in O(10)-m depth, seaward of the surfzone, with wave conditions estimated from regional nonlinear spectral wave models [e.g., Simulating Waves Nearshore (SWAN)]. These models are computationally expensive for high-resolution, long-term regional O(100)-km hindcasts, and they limit examination of the effect of different climate scenarios on nearshore processes. Alternatively,...

  • Rowell T.J, Aburto-Oropeza O, Cota-Nieto J.J, Steele M.A, Erisman B.E.  2019.  Reproductive behaviour and concurrent sound production of Gulf grouper Mycteroperca jordani (Epinephelidae) at a spawning aggregation site. Journal of Fish Biology. 94:277-296.
    Abstract Summary:

    The reproductive and acoustic behaviours of Gulf grouper Mycteroperca jordani were studied at a spawning aggregation site in the southern Gulf of California, Mexico. In May 2015-2017, divers located and surveyed a spawning aggregation site within Cabo Pulmo National Park. Adult M. jordani conformed to a lek mating system in which large males formed territories over sand adjacent to a rocky reef that were spatially segregated from smaller...

  • Frouin R., Ramon D., Boss E., Jolivet D., Compiegne M., Tan J., Bouman H., Jackson T., Franz B., Plett T. et al..  2018.  Satellite radiation products for ocean biology and biogeochemistry: Needs, state-of-the-art, gaps, development priorities, and opportunities. Frontiers in Marine Science. 5
    Abstract Summary:

    Knowing the spatial and temporal distribution of the underwater light field, i.e., the spectral and angular structure of the radiant intensity at any point in the water column, is essential to understanding the biogeochemical processes that control the composition and evolution of aquatic ecosystems and their impact on climate and reaction to climate change. At present, only a few properties are reliably retrieved from space, either directly...

  • Lozier M.S, Li F., Bacon S., Bahr F., Bower A.S, Cunningham S.A, de Jong M.F, de Steur L., Deyoung B., Fischer J. et al..  2019.  A sea change in our view of overturning in the subpolar North Atlantic. Science. 363:516-+.
    Abstract Summary:

    To provide an observational basis for the Intergovernmental Panel on Climate Change projections of a slowing Atlantic meridional overturning circulation (MOC) in the 21st century, the Overturning in the Subpolar North Atlantic Program (OSNAP) observing system was launched in the summer of 2014. The first 21-month record reveals a highly variable overturning circulation responsible for the majority of the heat and freshwater transport across...

  • Wang Q., Benmarhnia T., Li C.C, Knibbs L.D, Bao J.Z, Ren M., Zhang H.H, Wang S.H, Zhang Y.W, Zhao Q.G et al..  2019.  Seasonal analyses of the association between prenatal ambient air pollution exposure and birth weight for gestational age in Guangzhou, China. Science of the Total Environment. 649:526-534.
    Abstract Summary:

    Ambient air pollution has been linked to small for gestational age (SGA); however, the relationship with large for gestational age (ILA) is unclear and very few studies have investigated seasonal effects on the association between air pollution and SGA or LGA. Using birth registry data of 506,000 singleton live births from 11 districts in Guangzhou, China between January 2015 and July 2017, we examined associations between ambient air...

  • Nagy L., Williams W., Tauxe L, Muxworthy A.R, Ferreira I..  2019.  Thermomagnetic recording fidelity of nanometer-sized iron and implications for planetary magnetism. Proceedings of the National Academy of Sciences of the United States of America. 116:1984-1991.
    Abstract Summary:

    Paleomagnetic observations provide valuable evidence of the strength of magnetic fields present during evolution of the Solar System. Such information provides important constraints on physical processes responsible for rapid accretion of the protoplanetesimal disk. For this purpose, magnetic recordings must be stable and resist magnetic overprints from thermal events and viscous acquisition over many billions of years. A lack of...

  • Fang Y., Riahi S., McDonald A.T, Shrestha M., Tobias D.J, Grassian VH.  2019.  What is the driving force behind the adsorption of hydrophobic molecules on hydrophilic surfaces? Journal of Physical Chemistry Letters. 10:468-473.
    Abstract Summary:

    The adsorption of limonene, a common organic compound found in indoor air, on hydrophilic surfaces such as glass (SiO2), a prevalent surface in the indoor environment, is poorly understood. In this study, we have investigated the interaction of limonene and three other cyclic hydrocarbons (cyclohexane, cyclohexene, and benzene) on hydroxylated SiO2 using infrared spectroscopy and ab initio molecular dynamics (AIMD) simulations. Experimental...

  • Chen H.M, Yang R., Chen J.J, Luo Q.J, Cui X.S, Yan X.J, Gerwick WH.  2019.  1-Octen-3-ol, a self-stimulating oxylipin messenger, can prime and induce defense of marine alga. 19
    Abstract Summary:

    Short chain oxylipins in plants as the main volatile organic carbon have been speculated to playing an important role for plant innate immunity, however, not yet intensively studied and far away established as the fully recognized algae defense signals.ResultsThe production of 1-octen-3-ol is self-amplified via the fatty acid-oxylipin metabolic cycle through positive feedback loop. Production of 1-octen-3-ol may act as a messenger that...

  • Hartmann A.C, Marhaver KL, Klueter A., Lovci M.T, Closek C.J, Diaz E., Chamberland V.F, Archer FI, Deheyn DD, Vermeij MJA et al..  2019.  Acquisition of obligate mutualist symbionts during the larval stage is not beneficial for a coral host. Molecular Ecology. 28:141-155.
    Abstract Summary:

    Theory suggests that the direct transmission of beneficial endosymbionts (mutualists) from parents to offspring (vertical transmission) in animal hosts is advantageous and evolutionarily stable, yet many host species instead acquire their symbionts from the environment (horizontal acquisition). An outstanding question in marine biology is why some scleractinian corals do not provision their eggs and larvae with the endosymbiotic...

  • Scott S.R, Sims K.WW, Reagan M.K, Ball L., Schwieters J.B, Bouman C., Lloyd N.S, Waters C.L, Standish J.J, Tollstrup D.L.  2019.  The application of abundance sensitivity filters to the precise and accurate measurement of uranium series nuclides by plasma mass spectrometry. International Journal of Mass Spectrometry. 435:321-332.
    Abstract Summary:

    Application of retardation filters has revolutionized the use of multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) for the measurement of U-series disequilibria. Here, we present an evaluation of the application of retardation energy filters coupled with ion counting detectors for the measurement of U-series disequilibria by MC-ICPMS. We show that: 1) The RPQ minimizes backgrounds caused by ions experiencing irregular...

  • Abstract Summary:

    We present consistent annual mean atmospheric histories and growth rates for the mainly anthropogenic halogenated compounds HCFC-22, HCFC-141b, HCFC-142b, HFC-134a, HFC-125, HFC-23, PFC-14 and PFC-116, which are all potentially useful oceanic transient tracers (tracers of water transport within the ocean), for the Northern and Southern Hemisphere with the aim of providing input histories of these compounds for the equilibrium between the...

  • Oliver M.J, Kohut J.T, Bernard K., Fraser W., Winsor P., Statscewich H., Fredj E., Cimino M., Patterson-Fraser D., Carvalho F..  2019.  Central place foragers select ocean surface convergent features despite differing foraging strategies. Scientific Reports. 9
    Abstract Summary:

    Discovering the predictors of foraging locations can be challenging, and is often the critical missing piece for interpreting the ecological significance of observed movement patterns of predators. This is especially true in dynamic coastal marine systems, where planktonic food resources are diffuse and must be either physically or biologically concentrated to support upper trophic levels. In the Western Antarctic Peninsula, recent climate...

  • Roche J.W, Rice R., Meng X.D, Cayan DR, Dettinger MD, Alden D., Patel S.C, Mason M.A, Conklin M.H, Bales R.C.  2019.  Climate, snow, and soil moisture data set for the Tuolumne and Merced river watersheds, California, USA. Earth System Science Data. 11:101-110.
    Abstract Summary:

    We present hourly climate data to force land surface process models and assessments over the Merced and Tuolumne watersheds in the Sierra Nevada, California, for the water year 2010-2014 period. Climate data (38 stations) include temperature and humidity (23), precipitation (13), solar radiation (8), and wind speed and direction (8), spanning an elevation range of 333 to 2987 m. Each data set contains raw data as obtained from the source (...

  • Olive J.A, Parnell-Turner R., Escartin J., Smith D.K, Petersen S..  2019.  Controls on the seafloor exposure of detachment fault surfaces. Earth and Planetary Science Letters. 506:381-387.
    Abstract Summary:

    While oceanic detachment faults have been proposed to account for the accretion of similar to 40% of new seafloor in the North Atlantic ocean, clear exposures of large-offset, often-corrugated fault surfaces remain scarce and spatially limited. To help resolve this paradox, we examine the conditions under which detachment fault growth may or may not lead to extensive exposure of corrugated fault planes at the seafloor. Using high-resolution...

  • Fisher A., Wangpraseurt D., Larkum A.WD, Johnson M., Kuhl M., Chen M., Wong H.L, Burns B.P.  2019.  Correlation of bio-optical properties with photosynthetic pigment and microorganism distribution in microbial mats from Hamelin Pool, Australia. Fems Microbiology Ecology. 95
    Abstract Summary:

    Microbial mats and stromatolites are widespread in Hamelin Pool, Shark Bay, however the phototrophic capacity of these systems is unknown. This study has determined the optical properties and light-harvesting potential of these mats with light microsensors. These characteristics were linked via a combination of 16S rDNA sequencing, pigment analyses and hyperspectral imaging. Local scalar irradiance was elevated over the incident downwelling...

  • Peng Q.H, Xie SP, Wang D.X, Zheng XT, Zhang H.  2019.  Coupled ocean-atmosphere dynamics of the 2017 extreme coastal El Nino. Nature Communications. 10
    Abstract Summary:

    In March 2017, sea surface temperatures off Peru rose above 28 degrees C, causing torrential rains that affected the lives of millions of people. This coastal warming is highly unusual in that it took place with a weak La Nina state. Observations and ocean model experiments show that the downwelling Kelvin waves caused by strong westerly wind events over the equatorial Pacific, together with anomalous northerly coastal winds, are important....

  • Li J.B, Xie SP, Cook E.R, Chen F.H, Shi J.F, Zhang D.D, Fang K.Y, Gou X.H, Li T., Peng J.F et al..  2019.  Deciphering human contributions to Yellow River flow reductions and downstream drying using centuries-long tree ring records. Geophysical Research Letters. 46:898-905.
    Abstract Summary:

    The Yellow River flow has decreased substantially in recent decades, and the river often dried up in the lower reach and failed to reach the sea. Climate change and human disruption have been suggested as major causes of the flow reduction, but quantification of their relative contribution is challenging due to limited instrumental records and disturbance by dams. Here we use a basin-wide tree ring network to reconstruct the Yellow River flow...

  • Zhu J.L, Penner JE, Yu F.Q, Sillman S., Andreae M.O, Coe H..  2019.  Decrease in radiative forcing by organic aerosol nucleation, climate, and land use change. Nature Communications. 10
    Abstract Summary:

    Organic nucleation is an important source of atmospheric aerosol number concentration, especially in pristine continental regions and during the preindustrial period. Here, we improve on previous simulations that overestimate boundary layer nucleation in the tropics and add changes to climate and land use to evaluate climate forcing. Our model includes both pure organic nucleation and heteromolecular nucleation of sulfuric acid and organics...

  • Dadaglio L., Dinasquet J., Obernosterer I., Joux F..  2019.  Differential responses of bacteria to diatom-derived dissolved organic matter in the Arctic Ocean. Aquatic Microbial Ecology. 82:59-72.
    Abstract Summary:

    The Arctic sea ice cover is undergoing an unprecedented decline due to climate change. This loss may result in the earlier start of ice algae blooms and more intense phyto-plankton blooms, leading to higher concentrations of dissolved organic matter (DOM) derived from primary production. We investigated the response of early summer Arctic bacterial communities to the addition of Arctic diatom-derived DOM through biodegradation experiments in...

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