Recent Publications

Weekly Highlighted Publication

NADPH-dependent extracellular superoxide production is vital to photophysiology in the marine diatom Thalassiosira oceanica

Impact:
Batch cultures of T. oceanica were grown with replete initial nutrient concentrations under optimal light conditions, and whole cells were analyzed for net extracellular superoxide production by a flow-through chemiluminescence approach described previously. Results revealed that extracellular superoxide production rates were highest in exponential growth phase. As observed in other phytoplankton, this decline of net extracellular superoxide production with increasing age challenges the perception of superoxide as a stress-response molecule, given the continual drawdown of nutrients and the accumulation of cellular stress that occurs over time in batch cultures. These results therefore suggest that extracellular superoxide production may be a constitutive, or even beneficial physiological process in T. oceanica.

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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...

  • Abstract Summary:

    The formerly monotypic taxon, Hyalopale bispinosa Perkins 1985 (Cluysopetalinac), is comprised of a cryptic species complex from predominantly tropical embayments and island reefs of the Western Atlantic and Indo-Pacific Oceans. Hyalopale species are of meiofaunal size (length: 1-2.8mm), but considered non-interstitial, with the majority of species inhabiting a singular habitat of shallow littoral zones among algae and epifauna overlying...

  • Taylor J.RA, Scott N.I, Rouse GW.  2019.  Evolution of mantis shrimp telson armour and its role in ritualized fighting. 16
    Abstract Summary:

    Mantis shrimp possess both formidable weapons and impact-resistant armour that clash during ritualized combat. The telson is one of few biological structures known to withstand the repeated high impact forces of smashing mantis shrimp strikes, and it is hypothesized that this pairing of armour and weapon is associated with the evolution of telson sparring. We carried out a comparative analysis of telson impact mechanics across 15 mantis...

  • Gauglitz J.M, Aceves C.M, Aksenov A.A, Aleti G., Almaliti J., Bouslimani A., Brown E.A, Campeau A., Caraballo-Rodriguez A.M, Chaar R. et al..  2020.  Untargeted mass spectrometry-based metabolomics approach unveils molecular changes in raw and processed foods and beverages. 302
    Abstract Summary:

    In our daily lives, we consume foods that have been transported, stored, prepared, cooked, or otherwise processed by ourselves or others. Food storage and preparation have drastic effects on the chemical composition of foods. Untargeted mass spectrometry analysis of food samples has the potential to increase our chemical understanding of these processes by detecting a broad spectrum of chemicals. We performed a time-based analysis of the...

  • Aarons S.M, Arvin L.J, Aciego S.M, Riebe C.S, Johnson K.R, Blakowski M.A, Koornneef J.M, Hart S.C, Barnes M.E, Dove N. et al..  2019.  Competing droughts affect dust delivery to Sierra Nevada. 41
    Abstract Summary:

    The generation and transport of mineral dust is strongly related to climate on seasonal, year-to-year, and glacial-interglacial timescales. The modern dust cycle is influenced by soil moisture, which is partly a function of drought duration and severity. The production and transport of dust can therefore be amplified by global and regional droughts, thereby moderating ecosystem vulnerability to disturbance through the influence of dust on...

  • Tian Z., Chen H., Fegley B., Lodders K., Barrat J.A, Day JMD, Wang K..  2019.  Potassium isotopic compositions of howardite-eucrite-diogenite meteorites. 266:611-632.
    Abstract Summary:

    We report new high-precision stable K isotope data for three martian meteorites, one lunar meteorite, one ordinary chondrite, four terrestrial igneous United States Geological Survey (USGS) reference materials, and twenty howardite-eucrite-dio genite [HED] meteorites. The three martian meteorites define a relatively narrow delta K-41 range with an average of -0.36 +/- 0.12 parts per thousand (2 SD) that is slightly heavier than the Bulk...

  • Abstract Summary:

    As the proportion of the human population living in cities continues to increase, understanding the factors affecting urban biodiversity is crucial to enhancing conservation efforts, urban ecosystem function, and human wellbeing. Here we present the results of the first comparative study of belowground invertebrate communities in urban soils (lawns and biofilters) and remnant patches of native coastal sage scrub (CSS) in a semi-arid urban...

  • Day JMD, Sossi P.A, Shearer C.K, Moynier F..  2019.  Volatile distributions in and on the Moon revealed by Cu and Fe isotopes in the 'Rusty Rock' 66095. 266:131-143.
    Abstract Summary:

    The Apollo 16 'Rusty Rock' impact melt breccia 66095 is a volatile-rich sample, with the volatiles inherited through vapor condensation from an internal lunar source formed during thermo-magmatic evolution of the Moon. We report Cu and Fe isotope data for 66095 and find that bulk-rocks, residues and acid leaches span a relatively limited range of compositions (3.0 +/- 1.3 wt.% FeO [range = 2.0-4.8 wt.%], 5.4 +/- 3.1 ppm Cu [range = 3-12 ppm...

  • O'Donoghue A.J, Bibo-Verdugo B., Miyamoto Y., Wang S.C, Yang J.Z, Zuill D.E, Matsuka S., Jiang Z.Z, Almaliti J., Caffrey C.R et al..  2019.  20S proteasome as a drug target in Trichomonas vaginalis. 63
    Abstract Summary:

    Trichomoniasis is a sexually transmitted disease with hundreds of millions of annual cases worldwide. Approved treatment options are limited to two related nitro-heterocyclic compounds, yet resistance to these drugs is an increasing concern. New antimicrobials against the causative agent, Trichomonas vaginalis, are urgently needed. We show here that clinically approved anticancer drugs that inhibit the proteasome, a large protease complex...

  • Le Bras I.AA, Sonnewald M., Toole J.M.  2019.  A barotropic vorticity budget for the subtropical North Atlantic Based on observations. 49:2781-2797.
    Abstract Summary:

    To ground truth the large-scale dynamical balance of the North Atlantic subtropical gyre with observations, a barotropic vorticity budget is constructed in the ECCO state estimate and compared with hydrographic observations and wind stress data products. The hydrographic dataset at the center of this work is the A22 WOCE section, which lies along 66 degrees W and creates a closed volume with the North and South American coasts to its west....

  • Stephens BM, Wankel SD, J. Beman M, Rabines AJ, Allen AE, Aluwihare LI.  2019.  Euphotic zone nitrification in the California Current Ecosystem.
    Abstract Summary:

    Nitrification, the microbial conversion of ammonium to nitrite then to nitrate, occurs throughout the oceanic water column, yet the environmental factors influencing the production of nitrate in the euphotic zone (EZ) remain unclear. In this study, the natural abundances of N and O isotopes (δ15N and δ18O, respectively) in nitrate were used in an existing model framework to quantify nitrate contributed by EZ nitrification in the California...

  • Chen Z.S, Du Y., Wen Z.P, Wu R.G, Xie SP.  2019.  Evolution of south Tropical Indian Ocean warming and the climatic impacts following strong El Nino Events. 32:7329-7347.
    Abstract Summary:

    The south tropical Indian Ocean (TIO) warms following a strong El Nino, affecting Indo-Pacific climate in early boreal summer. While much attention has been given to the southwest TIO where the mean thermocline is shallow, this study focuses on the subsequent warming in the southeast TIO, where the mean sea surface temperature (SST) is high and deep convection is strong in early summer. The southeast TIO warming induces an anomalous...

  • Rogers J.S, Rayson M.D, Ko D.S, Winters KB, Fringer O.B.  2019.  A framework for seamless one-way nesting of internal wave-resolving ocean models. 143
    Abstract Summary:

    To resolve nonlinear internal wave motions in regional domains, we propose a one-way ocean model nesting framework in which a nonhydrostatic model is nested within a regional model. The nesting scheme produces internal tides that propagate freely into and out of the nonhydrostatic model domain with no reflections while nudging the low-frequency motions. We demonstrate the method with idealized test cases and a field-scale simulation of the...

  • Wang J.K, Johnson K.R, Borsato A., Amaya D.J, Griffiths M.L, Henderson G.M, Frisia S., Mason A..  2019.  Hydroclimatic variability in Southeast Asia over the past two millennia. 525
    Abstract Summary:

    The spatiotemporal variability of the Asian Monsoon (AM) over the last two millennia has been attributed to a combination of external solar and volcanic forcing and/or internal coupled atmosphere-ocean dynamics, but the relative importance of these mechanisms remains unresolved. The present knowledge of multidecadal to centennial-scale AM variability over Mainland Southeast Asia is not well-constrained, despite substantial progress in...

  • Costa J.AV, Freitas B.CB, Rosa G.M, Moraes L., Morais M.G, Mitchell B.G.  2019.  Operational and economic aspects of Spirulina-based biorefinery. 292
    Abstract Summary:

    Microalgae biorefinery systems have been extensively studied from the perspective of resources, energy expenditure, biofuel production potential, and high-added value products. The genus Spirulina (Arthrospira) stands out among the microalgae of commercial importance. It accounts for over 30% of biomass produced globally because of high protein concentration and, carotenoid and phycocyanin content. Spirulina cultivation can be used to reduce...

  • Johnson A.C, Aarons S.M, Dauphas N., Nie N.X, Zeng H., Helz R.T, Romaniello S.J, Anbar A.D.  2019.  Titanium isotopic fractionation in Kilauea Iki lava lake driven by oxide crystallization. 264:180-190.
    Abstract Summary:

    Recent work has demonstrated that titanium (Ti) isotopes undergo mass-dependent isotope fractionation during magmatic differentiation, leaving evolved silicic melts preferentially enriched in heavy Ti isotopes. Preferential incorporation of light Ti isotopes in crystallizing Fe-Ti oxides is thought to be the mechanism responsible for this fractionation in magmatic rocks. To test this hypothesis, we present Ti isotope measurements of Fe-Ti...

  • Chen C.L, Wang G.H, Xie SP, Liu W.  2019.  Why does global warming weaken the Gulf Stream but intensify the Kuroshio? 32:7437-7451.
    Abstract Summary:

    The Kuroshio and Gulf Stream, the subtropical western boundary currents of the North Pacific and North Atlantic, play important roles in meridional heat transport and ocean-atmosphere interaction processes. Using a multimodel ensemble of future projections, we show that a warmer climate intensifies the upper-layer Kuroshio, in contrast to the previously documented slowdown of the Gulf Stream. Our ocean general circulation model experiments...

  • Abstract Summary:

    Background: High ambient temperature has been linked to a number of types of morbidity, such as cardiovascular disease and dehydration. Fewer studies have explored specifically the relationship between ambient temperature and liver, kidney, and urinary system morbidity despite known biological impacts of extreme high temperatures on those systems. Objective: We assessed the relationship between temperature and hospitalizations related to...

  • Lilly L.E, Send U, Lankhorst M., Martz T.R, Feely R.A, Sutton A.J, Ohman MD.  2019.  Biogeochemical anomalies at two Southern California Current system moorings during the 2014-2016 Warm Anomaly-El Nino Sequence.
    Abstract Summary:

    We analyzed impacts of the 2014-2015 Pacific Warm Anomaly and 2015-2016 El Nino on physical and biogeochemical variables at two southern California Current System moorings (CCE2, nearshore upwelling off Point Conception; CCE1, offshore California Current). Nitrate and Chl-a fluorescence were <1 mu M and <1 Standardized Fluorescence Unit, respectively, at CCE2 for the entire durations of the Warm Anomaly and El Nino, the two longest...

  • Chaix B., Benmarhnia T., Kestens Y., Brondeel R., Perchoux C., Gerber P., Duncan D.T.  2019.  Combining sensor tracking with a GPS-based mobility survey to better measure physical activity in trips: public transport generates walking. 16
    Abstract Summary:

    Background Policymakers need accurate data to develop efficient interventions to promote transport physical activity. Given the imprecise assessment of physical activity in trips, our aim was to illustrate novel advances in the measurement of walking in trips, including in trips incorporating non-walking modes. Methods We used data of 285 participants (RECORD MultiSensor Study, 2013-2015, Paris region) who carried GPS receivers and...

  • Abstract Summary:

    Ground-based remote sensing measurements from the Atmospheric Radiation Measurement Program (ARM) West Antarctic Radiation Experiment (AWARE) campaign at the McMurdo station and the ARM North Slope of Alaska (NSA) Utqia & x121;vik site are used to retrieve and analyze single-layer stratiform mixed-phase cloud macrophysical and microphysical properties for these different polar environments. Single-layer stratiform mixed-phase clouds have...

  • Cordero-Quiros N., Miller AJ, Subramanian AC, Luo J.Y, Capotondi A..  2019.  Composite physical-biological El Nino and La Nina conditions in the California Current System in CESM1-POP2-BEC. 142
    Abstract Summary:

    El Nino-Southern Oscillation (ENSO) is recognized as one of the potentially predictable drivers of California Current System (CCS) variability. In this study, we analyze a 67-year coarse-resolution (similar to 1 degrees) simulation using the ocean model CESM-POP2-BEC forced by NCEP/NCAR reanalysis winds to develop a model composite of the physical-biological response of the CCS during ENSO events. The model results are also compared with...

  • Highlighted Publication Zonal–vertical distribution of (a) vertical velocity and wind vectors, (b) zonal wind and wind vectors, and (c) meridional wind  averaged between 138 and 158N for November from ERA-Interim. (d)–(f) The corresponding biases from the AMIP simulation.
    Song X.L, Zhang GJ.  2019.  Culprit of the Eastern Pacific Double-ITCZ Bias in the NCAR CESM1.2. 32:6349-6364.
    Abstract Summary:

    The eastern Pacific double-ITCZ bias has long been attributed to the warm bias of SST in the southeastern Pacific and associated local air-sea interaction. In this study, we conducted two simulations using the NCAR CESM1.2.1 to demonstrate that significant double-ITCZ bias can still form in the eastern Pacific through air-sea coupled feedback even when there is cold SST bias in the southeastern Pacific, indicating that other nonlocal culprits...

  • Roemmich D., Sherman J.T, Davis R.E, Grindley K., McClune M., Parker C.J, Black D.N, Zilberman N., Purkey S.G, Sutton P.JH et al..  2019.  Deep SOLO: A full-depth profiling float for the Argo Program. 36:1967-1981.
    Abstract Summary:

    Deployment of Deep Argo regional pilot arrays is underway as a step toward a global array of 1250 surface-to-bottom profiling floats embedded in the upper-ocean (2000 m) Argo Program. Of the 80 active Deep Argo floats as of July 2019, 55 are Deep Sounding Oceanographic Lagrangian Observer (SOLO) 6000-m instruments, and the rest are composed of three additional models profiling to either 4000 or 6000 m. Early success of the Deep SOLO is owed...

  • Boudreau P.D, Miller B.W, McCall L.I, Almaliti J., Reher R., Hirata K., Le T., Siqueira-Neto J.L, Hook V., Gerwick WH.  2019.  Design of Gallinamide A analogs as potent inhibitors of the cysteine proteases human Cathepsin L and Trypanosoma cruzi Cruzain. 62:9026-9044.
    Abstract Summary:

    Gallinamide A, originally isolated with a modest antimalarial activity, was subsequently reisolated and characterized as a potent, selective, and irreversible inhibitor of the human cysteine protease cathepsin L. Molecular docking identified potential modifications to improve binding, which were synthesized as a suite of analogs. Resultingly, this current study produced the most potent gallinamide analog yet tested against cathepsin L (10, K-...

  • Abstract Summary:

    Objectively determining the level of ecosystem model complexity necessary to achieve meaningful representations of biogeochemical cycles at different spatial and temporal scales is an outstanding issue in marine ecosystem modeling. As part of the development of a three-dimensional (3D) Regional Ocean Modelling System (ROMS) application for the northwest North Atlantic Ocean, we compare model results from three alternative ecosystem model...

  • Smith SR, Dupont CL, McCarthy JK, Broddrick JT, Oborník M, Horák A, Füssy Z, Cihlář J, Kleessen S, Zheng H et al..  2019.  Evolution and regulation of nitrogen flux through compartmentalized metabolic networks in a marine diatom. 10:4552.
    Abstract Summary:

    Diatoms outcompete other phytoplankton for nitrate, yet little is known about the mechanisms underpinning this ability. Genomes and genome-enabled studies have shown that diatoms possess unique features of nitrogen metabolism however, the implications for nutrient utilization and growth are poorly understood. Using a combination of transcriptomics, proteomics, metabolomics, fluxomics, and flux balance analysis to examine short-term shifts in...

  • Prenni A.J, Hand J.L, Malm W.C, Copeland S., Luo G, Yu F, Taylor N., Russell LM, Schichtel B.A.  2019.  An examination of the algorithm for estimating light extinction from IMPROVE particle speciation data. 214
    Abstract Summary:

    The Interagency Monitoring of Protected Visual Environments (IMPROVE) network is the basis for monitoring visibility in Class I Areas throughout the United States. Monitoring is conducted by collecting PM2.5 and PM10 samples every third day at over 150 remote and rural sites nationwide, with PM2.5 samples being analyzed for chemical composition. Light extinction is reconstructed using an algorithm that relates speciated mass to light...

  • Wang J.A, Sulla-Menashe D., Woodcock C.E, Sonnentag O., Keeling RF, Friedl M.A.  2019.  Extensive land cover change across Arctic-Boreal Northwestern North America from disturbance and climate forcing.
    Abstract Summary:

    A multitude of disturbance agents, such as wildfires, land use, and climate-driven expansion of woody shrubs, is transforming the distribution of plant functional types across Arctic-Boreal ecosystems, which has significant implications for interactions and feedbacks between terrestrial ecosystems and climate in the northern high-latitude. However, because the spatial resolution of existing land cover datasets is too coarse, large-scale land...

  • Saliba G., Chen C.L, Lewis S., Russell LM, Rivellini L.H, Lee A.KY, Quinn P.K, Bates T.S, Haentjens N., Boss E.S et al..  2019.  Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. 116:20309-20314.
    Abstract Summary:

    Four North Atlantic Aerosol and Marine Ecosystems Study (NAAMES) field campaigns from winter 2015 through spring 2018 sampled an extensive set of oceanographic and atmospheric parameters during the annual phytoplankton bloom cycle. This unique dataset provides four seasons of open-ocean observations of wind speed, sea surface temperature (SST), seawater particle attenuation at 660 nm (c(p,660), a measure of ocean particulate organic carbon),...

  • Hennon T.D, Alford MH, Zhao Z.X.  2019.  Global assessment of semidiurnal internal tide aliasing in Argo profiles. 49:2523-2533.
    Abstract Summary:

    Though unresolved by Argo floats, internal waves still impart an aliased signal onto their profile measurements. Recent studies have yielded nearly global characterization of several constituents of the stationary internal tides. Using this new information in conjunction with thousands of floats, we quantify the influence of the stationary, mode-1 M-2 and S-2 internal tides on Argo-observed temperature. We calculate the in situ temperature...

  • Asselin O., Young W.R.  2019.  An improved model of near-inertial wave dynamics. 876:428-448.
    Abstract Summary:

    The YBJ equation (Young & Ben Jelloul, J. Marine Res., vol. 55, 1997, pp. 735-766) provides a phase-averaged description of the propagation of near-inertial waves (NIWs) through a geostrophic flow. YBJ is obtained via an asymptotic expansion based on the limit , where is the Burger number of the NIWs. Here we develop an improved version, the YBJ(+) equation. In common with an earlier improvement proposed by Thomas, Smith & Buhler (J....

  • Chapman W.E, Subramanian AC, L. Monache D, Xie SP, Ralph FM.  2019.  Improving atmospheric river forecasts with machine learning.
    Abstract Summary:

    This study tests the utility of convolutional neural networks as a postprocessing framework for improving the National Center for Environmental Prediction's Global Forecast System's integrated vapor transport forecast field in the Eastern Pacific and western United States. Integrated vapor transport is the characteristic field of atmospheric rivers, which provide over 65% of yearly precipitation at some western U.S. locations. The method...

  • Abstract Summary:

    The slowdown of the Atlantic meridional overturning circulation (AMOC)(1-3) and the accelerated warming of the tropical Indian Ocean (TIO)(4-6) are two robust features projected for anthropogenic greenhouse warming, affecting both regional and global climates(7,8). Here we use coupled climate simulations to investigate a previously overlooked link between the two phenomena. We demonstrate that TIO warming reduces rainfall over the tropical...

  • Pedersen N.E, Edwards C.B, Eynaud Y., Gleason A.CR, Smith JE, Sandin SA.  2019.  The influence of habitat and adults on the spatial distribution of juvenile corals.
    Abstract Summary:

    Population distributions are affected by a variety of spatial processes, including dispersal, intraspecific dynamics and habitat selection. Within reef-building coral communities, these processes are especially important during the earliest life stages when reproduction provides mobility among sessile organisms and populations experience the greatest mortality bottlenecks both before and immediately after settlement. Here, we used large-area...

  • Hu S.J, Zhang Y., Feng M, Du Y., Sprintall J, Wang F., Hu D.X, Xie Q., Chai F..  2019.  Interannual to decadal variability of upper-ocean salinity in the southern Indian Ocean and the role of the Indonesian Throughflow. 32:6403-6421.
    Abstract Summary:

    Variability of oceanic salinity, an indicator of the global hydrological cycle, plays an important role in the basin-scale ocean circulation. In this study, interannual to decadal variability of salinity in the upper layer of the Indian Ocean is investigated using Argo observations since 2004 and data assimilating model outputs (1992-2015). The southeastern Indian Ocean shows the strongest interannual to decadal variability of upper-ocean...

  • Abstract Summary:

    Sinking particles transport organic carbon produced in the surface ocean to the ocean interior, leading to net storage of atmospheric CO2 in the deep ocean. The rapid growth of in situ imaging technology has the potential to revolutionize our understanding of particle flux attenuation in the ocean; however, estimating particle flux from particle size and abundance (measured directly by in situ cameras) is challenging. Sinking rates are...

  • Lenain L., Pizzo N., Melville W.K.  2019.  Laboratory studies of Lagrangian transport by breaking surface waves. 876
    Abstract Summary:

    While it has long been recognized that Lagrangian drift at the ocean surface plays a critical role in the kinematics and dynamics of upper ocean processes, only recently has the contribution of wave breaking to this drift begun to be investigated through direct numerical simulations (Deike et al., J. Fluid Mech., vol. 829, 2017, pp. 364-391; Pizzo et al., J. Phys. Oceanogr., vol. 49(4), 2019, pp. 983-992). In this work, laboratory...

  • Kline DI, Teneva L., Okamoto D.K, Schneider K., Caldeira K., Miard T., Chai A., Marker M., Dunbar R.B, Mitchell B.G et al..  2019.  Living coral tissue slows skeletal dissolution related to ocean acidification. 3:1438-1444.
    Abstract Summary:

    Climate change is causing major changes to marine ecosystems globally, with ocean acidification of particular concern for coral reefs. Using a 200 d in situ carbon dioxide enrichment study on Heron Island, Australia, we simulated future ocean acidification conditions, and found reduced pH led to a drastic decline in net calcification of living corals to no net growth, and accelerated disintegration of dead corals. Net calcification declined...

  • Ty A.JA, Fang Z., Gonzalez R.A, Rozdeba P.J, Abarbanel H.DI.  2019.  Machine learning of time series using time-delay embedding and precision annealing. 31:2004-2024.
    Abstract Summary:

    Tasking machine learning to predict segments of a time series requires estimating the parameters of a ML model with input/output pairs from the time series. We borrow two techniques used in statistical data assimilation in order to accomplish this task: time-delay embedding to prepare our input data and precision annealing as a training method. The precision annealing approach identifies the global minimum of the action (-log[P]). In this way...

  • Li Z.R, Li J., Cai W.L, Lai J.YH, McKinnie S.MK, Zhang W.P, Moore BS, Zhang W.J, Qian PY.  2019.  Macrocyclic colibactin induces DNA double-strand breaks via copper-mediated oxidative cleavage. 11:880-889.
    Abstract Summary:

    Colibactin is an assumed human gut bacterial genotoxin, whose biosynthesis is linked to the clb genomic island that has a widespread distribution in pathogenic and commensal human enterobacteria. Colibactin-producing gut microbes promote colon tumour formation and enhance the progression of colorectal cancer via cellular senescence and death induced by DNA doublestrand breaks (DSBs); however, the chemical basis that contributes to the...

  • Abstract Summary:
  • Cordoba-Ramirez F., Flores C., Gonzalez-Fernandez A., Constable S, Pena-Dominguez G., Gomez-Trevino E..  2019.  Marine controlled-source electromagnetics with geothermal purposes; central Gulf of California, Mexico. 384:206-220.
    Abstract Summary:

    We acquired and interpreted data from two controlled-source electromagnetic profiles, in the Gulf of California off the coast of Santa Rosalia, Baja California Sur, Mexico. This area is interesting from the geothermal point of view due to its proximity to the Guaymas Basin, the La Reforma Caldera, and the Las Tres Virgenes volcano, the first with intense submarine hydrothermal manifestations and the final one with a geothermal field in...

  • Spicer G.LC, Eid A., Wangpraseurt D., Swain T.D, Winkelmann J.A, Yi J., Kuhl M., Marcelino L.A, Backman V..  2019.  Measuring light scattering and absorption in corals with Inverse Spectroscopic Optical Coherence Tomography (ISOCT): a new tool for non-invasive monitoring. 9
    Abstract Summary:

    The success of reef-building corals for >200 million years has been dependent on the mutualistic interaction between the coral host and its photosynthetic endosymbiont dinoflagellates (family Symbiodiniaceae) that supply the coral host with nutrients and energy for growth and calcification. While multiple light scattering in coral tissue and skeleton significantly enhance the light microenvironment for Symbiodiniaceae, the mechanisms of...

  • Abstract Summary:

    The mesopelagic (200-1000 m) separates the productive upper ocean from the deep ocean, yet little is known of its long-term dynamics despite recent research that suggests fishes of this zone likely dominate global fish biomass and contribute to the downward flux of carbon. Here we show that mesopelagic fishes dominate the otolith (ear bone) record in anoxic sediment layers of the Santa Barbara Basin over the past two millennia. Among these...

  • Eiben C.B, de Rond T., Bloszies C., Gin J., Chiniquy J., Baidoo E.EK, Petzold C.J, Hillson N.J, Fiehn O., Keasling J.D.  2019.  Mevalonate pathway promiscuity enables noncanonical terpene production. 8:2238-2247.
    Abstract Summary:

    Lepidoptera (butterflies and moths) make the six-carbon compounds homoisopentenyl pyrophosphate (HIPP) and homodimethylallyl pyrophosphate (HDMAPP) that are incorporated into 16, 17, and 18 carbon farnesyl pyrophosphate (FPP) analogues. In this work we heterologously expressed the lepidopteran modified mevalonate pathway, a propionyl-CoA ligase, and terpene cyclases in E. coli to produce several novel terpenes containing 16 carbons. Changing...

  • Abstract Summary:

    The Atmospheric Radiation Measurement (ARM) West Antarctic Radiation Experiment (AWARE) provided a highly detailed set of remote-sensing and surface observations to study Antarctic clouds and surface energy balance, which have received much less attention than for the Arctic due to greater logistical challenges. Limited prior Antarctic cloud observations have slowed the progress of numerical weather prediction in this region. The AWARE...

  • Healy T.M, Brennan R.S, Whitehead A., Schulte P.M.  2019.  Mitochondria, sex and variation in routine metabolic rate.
    Abstract Summary:

    Variation in the metabolic costs associated with organismal maintenance may play a key role in determining fitness, and thus these differences among individuals are likely to be subject to natural selection. Although the evolvability of maintenance metabolism depends on its underlying genetic architecture, relatively little is known about the nature of genetic variation that underlies this trait. To address this, we measured variation in...

  • Ding Y., Murphy K.M, Poretsky E., Mafu S., Yang B, Char S.N, Christensen S.A, Saldivar E., Wu M.X, Wang Q. et al..  2019.  Multiple genes recruited from hormone pathways partition maize diterpenoid defences. 5:1043-1056.
    Abstract Summary:

    Duplication and divergence of primary pathway genes underlie the evolution of plant specialized metabolism; however, mechanisms partitioning parallel hormone and defence pathways are often speculative. For example, the primary pathway intermediate ent-kaurene is essential for gibberellin biosynthesis and is also a proposed precursor for maize antibiotics. By integrating transcriptional coregulation patterns, genome-wide association studies,...

  • Daniel P, J. MJeremiah, Emily K, Mingxun W, E. WMargot, E. AEric, I. ALihini, C. DPieter.  2019.  Non-targeted metabolomics enables the prioritization and tracking of anthropogenic pollutants in coastal seawater.
    Abstract Summary:

    Anthropogenic pollutants inundate marine ecosystems as human population growth and urbanization rapidly increase along the coast. Our analytical methods are typically aimed at measuring and monitoring a restricted number of compounds. To prioritize coastal anthropogenic impacts in a comprehensive fashion, we applied large-scale non-targeted liquid chromatography tandem mass spectrometry. We integrated an advanced data analysis pipeline that...