Recent Publications

Weekly Highlighted Publication

Parasite and host biomass and reproductive output in barnacle populations in the rocky intertidal zone

Impact:
Here, we provide an initial insight into the role of parasites in rocky intertidal communities by examining how H. balani impacts Chthamalus fissus hosts and populations using the currencies of biomass and reproduction. Chthamalus fissus is a simultaneously hermaphroditic acorn barnacle susceptible to parasitism by H. balani that inhabits the high rocky intertidal zone. We first documented the relationship between body size and reproductive output for both individual hosts and parasites. We then applied these relationships to natural barnacle populations from 12 localities throughout Southern California, allowing us to express the impacts of parasitism at the population-level in terms of host and parasite standing-stock biomasses and reproductive outputs.

Search Recent Publications

  • 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...

  • Norris J., Carvalho L.MV, Jones C., Cannon F..  2019.  Deciphering the contrasting climatic trends between the central Himalaya and Karakoram with 36 years of WRF simulations. Climate Dynamics. 52:159-180.
    Abstract Summary:

    Glaciers over the central Himalaya have retreated at particularly rapid rates in recent decades, while glacier mass in the Karakoram appears stable. To address the meteorological factors associated with this contrast, 36 years of Climate Forecast System Reanalyses (CFSR) are dynamically downscaled from 1979 to 2015 with the Weather Research and Forecasting (WRF) model over High Mountain Asia at convection permitting grid spacing (6.7 km). In...

  • 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...

  • Choi H., Engene N, Byrum T., Hwang S., Oh D.C, Gerwick WH.  2019.  Dragocins A-D, structurally intriguing cytotoxic metabolites from a Panamanian marine cyanobacterium. Organic Letters. 21:266-270.
    Abstract Summary:

    Dragocins A-D (1-4) were isolated from a dark-red wooly textured marine cyanobacterium collected in Boca del Drago, Panama. Dragocins A-C (1-3) possessed 2,3-dihydroxypyrrolidine, 1-hydroxy-5-O-Me-benzoyl, and 4'-substituted-beta-ribofuranose moieties that connected to form a nine-membered macrocyclic ring. Dragocins A-C are members of a unique hybrid structural class with substitution at the C-4' position of a ribofuranose unit. Of the four...

  • Lee K.H, Jeong H.J, Lee K., Franks PJS, Seong K.A, Lee S.Y, Lee M.J, Jang S.H, Potvin E., Lim A.S et al..  2019.  Effects of warming and eutrophication on coastal phytoplankton production. Harmful Algae. 81:106-118.
    Abstract Summary:

    Phytoplankton production in coastal waters influences seafood production and human health and can lead to harmful algal blooms. Water temperature and eutrophication are critical factors affecting phytoplankton production, although the combined effects of warming and nutrient changes on phytoplankton production in coastal waters are not well understood. To address this, phytoplankton production changes in natural waters were investigated using...

  • Nickels C.F, Sala L.M, Ohman MD.  2019.  The euphausiid prey field for blue whales around a steep bathymetric feature in the southern California current system. Limnology and Oceanography. 64:390-405.
    Abstract Summary:

    Euphausiids are important prey for many marine organisms and often occur in patchy aggregations. Euphausiid predators, such as blue whales, may become concentrated in the vicinity of these aggregations. We investigated an area called Nine Mile Bank (NMB) near San Diego, California, defined by an area of steep bathymetry, to determine whether the frequent whale sightings in that locality can be explained by the distribution of euphausiids...

  • Abstract Summary:

    Low-frequency intraseasonal oscillations in the tropical atmosphere in general circulation models (GCMs) were studied extensively in many previous studies. However, the simulation of the quasi-biweekly oscillation (QBWO), which is an important component of the intraseasonal oscillations, in GCMs has not received much attention. This paper evaluates the QBWO features over the South China Sea in early [May-June (MJ)] and late [August-September...

  • Almaliti J., Miller B., Pietraszkiewicz H., Glukhov E., Naman C.B, Kline T., Hanson J., Li X.F, Zhou S.H, Valeriote F.A et al..  2019.  Exploration of the carmaphycins as payloads in antibody drug conjugate anticancer agents. 161:416-432.
    Abstract Summary:

    Antibody-drug conjugates (ADCs) represent a new dimension of anticancer chemotherapeutics, with warheads to date generally involving either antitubulin or DNA-directed agents to achieve low-to sub-nanomolar potency. However, other potent cytotoxins working by different pharmacological mechanisms are under investigation, such as alpha,beta-epoxyketone based proteasome inhibitors. These proteasome active agents are an emerging class of...

  • Peoples L.M, Norenberg M., Pric D., McGoldrick M., Novotny M., Bochdansky A., Bartlett DH.  2019.  A full-ocean-depth rated modular lander and pressure-retaining sampler capable of collecting hadal-endemic microbes under in situ conditions. Deep-Sea Research Part I-Oceanographic Research Papers. 143:50-57.
    Abstract Summary:

    The hadal zone remains one of the least studied environments because of its inaccessibility, in part because of hydrostatic pressures extending to 110 MPa. Few instruments are capable of sampling from such great depths. We have developed a full-ocean-depth-capable lander that can be fit with sampling packages for the collection of still images, video, motile megafauna, and hadal seawater. One payload includes a pressure-retaining sampler (PRS...

  • Ruhl C.J, Melgar D, Geng JH, Goldberg D.E, Crowell BW, Allen R.M, Bock Y, Barrientos S., Riquelme S., Baez J.C et al..  2019.  A global database of strong-motion displacement GNSS recordings and an example application to PGD scaling. Seismological Research Letters. 90:271-279.
    Abstract Summary:

    Displacement waveforms derived from Global Navigation Satellite System (GNSS) data have become more commonly used by seismologists in the past 15 yrs. Unlike strong-motion accelerometer recordings that are affected by baseline offsets during very strong shaking, GNSS data record displacement with fidelity down to 0 Hz. Unfortunately, fully processed GNSS waveform data are still scarce because of limited public availability and the highly...

  • Webb J.R, Santos I.R, Maher D.T, Tait D.R, Cyronak T., Sadat-Noori M., Macklin P., Jeffrey L.C.  2019.  Groundwater as a source of dissolved organic matter to coastal waters: Insights from radon and CDOM observations in 12 shallow coastal systems. Limnology and Oceanography. 64:182-196.
    Abstract Summary:

    The influence of groundwater and pore-water exchange on dissolved organic matter (DOM) dynamics in coastal surface waters remains poorly understood. Here, we combine bottom up (i.e., groundwater-derived flux estimates) and top down (i.e., water column response) evidence to assess whether groundwater exchange drives DOM dynamics in shallow coastal waters. We rely on automated chromophoric DOM (CDOM, a proxy for DOM) and radon (Rn-222,...

  • Zhang W.P, Watanabe H.K, Ding W., Lan Y., Tian R.M, Sun J., Chen C., Cai L., Li Y.X, Oguri K. et al..  2019.  Gut microbial divergence between two populations of the hadal amphipod Hirondellea gigas. Applied and Environmental Microbiology. 85
    Abstract Summary:

    Hadal environments sustain diverse microorganisms. A few studies have investigated hadal microbial communities consisting of free-living or particle-associated bacteria and archaea. However, animal-associated microbial communities in hadal environments remain largely unexplored, and comparative analyses of animal gut microbiota between two isolated hadal environments have never been done so far. In the present study, 228 Gb of gut metagenomes...

  • Vano J.A, Dettinger MD, Cifelli R., Curtis D., Dufour A., Miller K., Olsen J.R, Wilson A.M.  2019.  Hydroclimatic extremes as challenges for the water management community: Lessons from Oroville Dam and Hurricane Harvey. Bulletin of the American Meteorological Society. 100:S9-S14.
    Abstract Summary:
  • Lennert-Cody C.E, Clarke S.C, Aires-da-Silva A., Maunder MN, Franks PJS, Roman M., Miller AJ, Minami M..  2019.  The importance of environment and life stage on interpretation of silky shark relative abundance indices for the equatorial Pacific Ocean. Fisheries Oceanography. 28:43-53.
    Abstract Summary:

    Recent large fluctuations in an index of relative abundance for the silky shark in the eastern Pacific Ocean have called into question its reliability as a population indicator for management. To investigate whether these fluctuations were driven by environmental forcing rather than true changes in abundance, a Pacific-wide approach was taken. Data collected by observers aboard purse-seine vessels fishing in the equatorial Pacific were used...

  • Wang W., Shearer PM.  2019.  An improved method to determine coda-Q, earthquake magnitude, and site amplification: Theory and application to Southern California. Journal of Geophysical Research-Solid Earth. 124:578-598.
    Abstract Summary:

    Seismic coda waves can be used to constrain attenuation, estimate earthquake magnitudes, and determine site amplification factors. We have developed a new multistation and multievent method to determine these three important seismic parameters simultaneously. We analyze 642 representative local (100 km) and shallow (20 km) earthquakes with catalog magnitudes between 1.8 and 5.4 in southern California at multiple frequency bands centered at 1....

  • Ong J.FM, Goh H.C, Lim S.C, Pang L.M, Chin J.SF, Tan K.S, Liang Z.X, Yang L., Glukhov E., Gerwick WH et al..  2019.  Integrated genomic and metabolomic approach to the discovery of potential anti-quorum sensing natural products from microbes associated with marine samples from Singapore. Marine Drugs. 17
    Abstract Summary:

    With 70% of the Earth's surface covered in water, the marine ecosystem offers immense opportunities for drug discovery and development. Due to the decreasing rate of novel natural product discovery from terrestrial sources in recent years, many researchers are beginning to look seaward for breakthroughs in new therapeutic agents. As part of an ongoing marine drug discovery programme in Singapore, an integrated approach of combining...

  • Abstract Summary:

    We examine the behavior of natural basaltic and trachytic samples during paleointensity experiments on both the original and laboratory-acquired thermal remanences and characterize the samples using proxies for domain state including curvature (k) and the bulk domain stability parameters of Paterson (2011, https://doi.org/10.1029/2011JB008369) and Paterson et al. (2017,...

  • Till C.P, Solomon J.R, Cohen N.R, Lampe R.H, Marchetti A., Coale T.H, Bruland K.W.  2019.  The iron limitation mosaic in the California Current System: Factors governing Fe availability in the shelf/near-shelf region. Limnology and Oceanography. 64:109-123.
    Abstract Summary:

    The California Current System is a productive eastern boundary region off the coasts of Washington, Oregon, and California. There is strong seasonality to the region, with high levels of rainfall and river input to the coastal ocean during the winter season, and coastal and Ekman upwelling during the spring and summer. Iron (Fe) input to the coastal ocean during the winter months can be stored in the continental shelf mud belts and then be...

  • Kong Q.K, Trugman D.T, Ross Z.E, Bianco M.J, Meade B.J, Gerstoft P.  2019.  Machine learning in seismology: Turning data into insights. Seismological Research Letters. 90:3-14.
    Abstract Summary:

    This article provides an overview of current applications of machine learning (ML) in seismology. ML techniques are becoming increasingly widespread in seismology, with applications ranging from identifying unseen signals and patterns to extracting features that might improve our physical understanding. The survey of the applications in seismology presented here serves as a catalyst for further use of ML. Five research areas in seismology are...

  • Allaband C., McDonald D., Vazquez-Baeza Y., Minich J.J, Tripathi A., Brenner D.A, Loomba R., Smarr L., Sandborn W.J, Schnabl B. et al..  2019.  Microbiome 101: Studying, analyzing, and interpreting gut microbiome data for clinicians. 17:218-230.
    Abstract Summary:

    Advances in technical capabilities for reading complex human microbiomes are leading to an explosion of microbiome research, leading in turn to intense interest among clinicians in applying these techniques to their patients. In this review, we discuss the content of the human microbiome, including intersubject and intrasubject variability, considerations of study design including important confounding factors, and different methods in the...

  • Swalethorp R., Dinasquet J., Logares R., Bertilsson S., Kjellerup S., Krabberod A.K, Moksnes P.O, Nielsen T.G, Riemann L..  2019.  Microzooplankton distribution in the Amundsen Sea Polynya (Antarctica) during an extensive Phaeocystis antarctica bloom. Progress in Oceanography. 170:1-10.
    Abstract Summary:

    In Antarctica, summer is a time of extreme environmental shifts resulting in large coastal phytoplankton blooms fueling the food web. Despite the importance of the microbial loop in remineralizing biomass from primary production, studies of how microzooplankton communities respond to such blooms in the Southern Ocean are rather scarce. Microzooplankton (ciliate and dinoflagellate) communities were investigated combining microscopy and 18S...

  • Roux S., Adriaenssens E.M, Dutilh B.E, Koonin E.V, Kropinski A.M, Krupovic M., Kuhn J.H, Lavigne R., Brister J.R, Varsani A. et al..  2019.  Minimum information about an uncultivated virus genome (MIUViG). Nature Biotechnology. 37:29-37.
    Abstract Summary:

    We present an extension of the Minimum Information about any (x) Sequence (MIxS) standard for reporting sequences of uncultivated virus genomes. Minimum Information about an Uncultivated Virus Genome (MIUViG) standards were developed within the Genomic Standards Consortium framework and include virus origin, genome quality, genome annotation, taxonomic classification, biogeographic distribution and in silico host prediction. Community-wide...

  • Ramon D., Steinmetz F., Jolivet D., Compiegne M., Frouin R..  2019.  Modeling polarized radiative transfer in the ocean-atmosphere system with the GPU-accelerated SMART-G Monte Carlo code. Journal of Quantitative Spectroscopy & Radiative Transfer. 222:89-107.
    Abstract Summary:

    SMART-G (Speed-Up Monte-Carlo Advanced Radiative Transfer code with GPU) is a radiative transfer solver for the coupled ocean-atmosphere system with a wavy interface. It is based on the Monte-Carlo technique, works in either plane-parallel or spherical-shell geometry, and accounts for polarization. The vector code is written in CUDA (Compute Unified Device Architecture) and runs on GPUs (Graphic Processing Units). For typical simulations, the...

  • Weller RA, Farrar J.T, Seo H, Prend C., Sengupta D., Lekha J.S, Ravichandran M., Venkatesen R..  2019.  Moored observations of the surface meteorology and air-sea fluxes in the northern Bay of Bengal in 2015. Journal of Climate. 32:549-573.
    Abstract Summary:

    Time series of surface meteorology and air-sea fluxes from the northern Bay of Bengal are analyzed, quantifying annual and seasonal means, variability, and the potential for surface fluxes to contribute significantly to variability in surface temperature and salinity. Strong signals were associated with solar insolation and its modulation by cloud cover, and, in the 5- to 50-day range, with intraseasonal oscillations (ISOs). The northeast (NE...

  • Highlighted Publication Survey map of the Beaufort Margin from Hly-1302
    Klotsko S., Driscoll N., Keigwin L..  2019.  Multiple meltwater discharge and ice rafting events recorded in the deglacial sediments along the Beaufort Margin, Arctic Ocean. Quaternary Science Reviews. 203:185-208.
    Abstract Summary:

    The first regional model for the deglacial history of the Beaufort margin slope, in the western Arctic, is presented. The conceptual model was developed using new high-resolution CHIRP seismic reflection, multibeam bathymetry, and sediment core data acquired along the margin. This synthesis provides important constraints on sediment source and dispersal patterns for the last deglaciation. The continental slope from Barrow Canyon to the...

  • Hendrix A.R, Hurford T.A, Barge L.M, Bland M.T, Bowman J.S, Brinckerhoff W., Buratti B.J, Cable M.L, Castillo-Rogez J., Collins G.C et al..  2019.  The NASA Roadmap to Ocean Worlds. Astrobiology. 19:1-27.
    Abstract Summary:

    In this article, we summarize the work of the NASA Outer Planets Assessment Group (OPAG) Roadmaps to Ocean Worlds (ROW) group. The aim of this group is to assemble the scientific framework that will guide the exploration of ocean worlds, and to identify and prioritize science objectives for ocean worlds over the next several decades. The overarching goal of an Ocean Worlds exploration program as defined by ROW is to "identify ocean worlds,...

  • Evan AT.  2019.  A new method to characterize changes in the seasonal cycle of snowpack. Journal of Applied Meteorology and Climatology. 58:131-143.
    Abstract Summary:

    In the western United States, water stored as mountain snowpack is a large percentage of the total water needed to meet the region's demands, and it is likely that, as the planet continues to warm, mountain snowpack will decline. However, detecting such trends in the observational record is challenging because snowpack is highly variable in both space and time. Here, a method for characterizing mountain snowpack is developed that is based on...

  • Gruetzner J., Espejo F.JJ, Lathika N., Uenzelmann-Neben G., Hall I.R, Hemming S.R, LeVay L.J, Barker S., Berke M.A, Brentegani L. et al..  2019.  A new seismic stratigraphy in the Indian-Atlantic Ocean gateway resembles major paleo-oceanographic changes of the last 7 Ma. Geochemistry Geophysics Geosystems. 20:339-358.
    Abstract Summary:

    The exchange of water masses between the Indian Ocean and the Atlantic constitutes an integral interocean link in the global thermohaline circulation. Long-term changes in deep water flow have been studied using seismic reflection profiles but the seismic stratigraphy was poorly constrained and not resolved for the time period from the late Miocene onward. Here we present results from International Ocean Discovery Program Site U1475 (Agulhas...

  • Cape M.R, Straneo F, Beaird N., Bundy R.M, Charette MA.  2019.  Nutrient release to oceans from buoyancy-driven upwelling at Greenland tidewater glaciers. Nature Geoscience. 12:34-+.
    Abstract Summary:

    The discharge of nutrient-rich meltwater from the Greenland Ice Sheet has emerged as a potentially important contributor to regional marine primary production and nutrient cycling. While significant, this direct nutrient input by the ice sheet may be secondary to the upwelling of deep-ocean-sourced nutrients driven by the release of meltwater at depth in glacial fjords. Here, we present a comprehensive suite of micro- and macronutrient...

  • Abstract Summary:

    A regional high-resolution CHIRP seismic survey in the Gulf of Papua (GoP) extends the geographic scope of previous studies by 125 km and reveals that the Holocene clinothem along-margin geometries, surfaces of lap, and steepness of foreset slopes appear less dependent on eustatic sea level changes and sediment supply than previously suggested. Clinothems imaged by CHIRP profiles and sampled by sediment cores include two older, relict...

  • Fiedler J.W, Smit P.B, Brodie K.L, McNinch J., Guza RT.  2019.  The offshore boundary condition in surf zone modeling. Coastal Engineering. 143:12-20.
    Abstract Summary:

    Numerical models predicting surfzone waves and shoreline runup in field situations are often initialized with shoreward propagating (sea-swell, and infragravity) waves at an offshore boundary in 10-30 m water depth. We develop an offshore boundary condition, based on Fourier analysis of observations with co-located current and pressure sensors, that accounts for reflection and includes nonlinear phase-coupling. The performance of additional...

  • Chappell P.D, Armbrust E.V, Barbeau K.A, Bundy R.M, Moffett J.W, Vedamati J., Jenkins B.D.  2019.  Patterns of diatom diversity correlate with dissolved trace metal concentrations and longitudinal position in the northeast Pacific coastal-offshore transition zone. Marine Ecology Progress Series. 609:69-86.
    Abstract Summary:

    Diatoms are important primary producers in the northeast Pacific Ocean, with their productivity closely linked to pulses of trace elements in the western high nitrate, low chlorophyll (HNLC) region of the oceanographic time series transect 'Line P.' Recently, the coastal-HNLC transition zone of the Line P transect was identified as a hotspot of phytoplankton productivity, potentially controlled by a combination of trace element and...

  • Boiteau R.M, Till C.P, Coale T.H, Fitzsimmons J.N, Bruland K.W, Repeta D.J.  2019.  Patterns of iron and siderophore distributions across the California Current System. Limnology and Oceanography. 64:376-389.
    Abstract Summary:

    Coastal upwelling of nutrients and metals along eastern boundary currents fuels some of the most biologically productive marine ecosystems. Although iron is a main driver of productivity in many of these regions, iron cycling and acquisition by microbes remain poorly constrained, in part due to the unknown composition of organic ligands that keep bioavailable iron in solution. In this study, we investigated organic ligand composition in...

  • Sepulveda I., Liu P.LF, Grigoriu M..  2019.  Probabilistic tsunami hazard assessment in South China Sea with consideration of uncertain earthquake characteristics. Journal of Geophysical Research-Solid Earth. 124:658-688.
    Abstract Summary:

    In this paper, we have conducted a probabilistic tsunami hazard assessment (PTHA) for Hong Kong (China) and Kao Hsiung (Taiwan), considering earthquakes generated in the Manila subduction zone. The new PTHA methodology with the consideration of uncertainties of slip distribution and location of future earthquakes extends the stochastic approach of Sepulveda et al. (2017). Using sensitivity analyses, we further investigate the uncertainties of...

  • Taboada F.G, Barton A.D, Stock C.A, Dunne J., John J.G.  2019.  Seasonal to interannual predictability of oceanic net primary production inferred from satellite observations. Progress in Oceanography. 170:28-39.
    Abstract Summary:

    Seasonal to interannual predictions of ecosystem dynamics have the potential to improve the management of living marine resources. Prediction of oceanic net primary production (NPP), the foundation of marine food webs and the biological carbon pump, is particularly promising, with recent analysis suggesting that ecosystem feedback processes may lead to higher predictability of NPP at interannual scales than for physical variables like sea...

  • Johnson K.M, Wong J.M, Hoshijima U., Sugano C.S, Hofmann G.E.  2019.  Seasonal transcriptomes of the Antarctic pteropod, Limacina helicina antarctica. Marine Environmental Research. 143:49-59.
    Abstract Summary:

    High latitude seas will be among the first marine systems to be impacted by ocean acidification (OA). Previous research studying the effects of OA on the pteropod, Limacina helicina antarctica, has led this species to be identified as a sentinel organism for OA in polar oceans. Here, we present gene expression data on L. h. antarctica, collected in situ during the seasonal transition from early spring to early summer. Our findings suggest...

  • Talley LD, Rosso I., Kamenkovich I., Mazloff MR, Wang J., Boss E., Gray A.R, Johnson K.S, Key R.M, Riser S.C et al..  2019.  Southern Ocean biogeochemical float deployment strategy, with example from the Greenwich meridian line (GO-SHIP A12). Journal of Geophysical Research-Oceans. 124:403-431.
    Abstract Summary:

    Biogeochemical Argo floats, profiling to 2,000-m depth, are being deployed throughout the Southern Ocean by the Southern Ocean Carbon and Climate Observations and Modeling program (SOCCOM). The goal is 200 floats by 2020, to provide the first full set of annual cycles of carbon, oxygen, nitrate, and optical properties across multiple oceanographic regimes. Building from no prior coverage to a sparse array, deployments are based on prior...

  • Shen S.SP, Clarke G., Shen B.W, Yao T.D.  2019.  Spatiotemporal variations of the twentieth century Tibetan Plateau precipitation based on the monthly 2.5 degrees reconstructed data. Theoretical and Applied Climatology. 135:71-83.
    Abstract Summary:

    This paper studies the spatiotemporal variations of precipitation over the Tibetan Plateau (TP) region with latitude and longitude ranges of (25 degrees N, 45 degrees N) and (65 degrees E, 105 degrees E) of the twentieth century from January 1901-December 2000. A long-term (January 1901-December 2009) TP monthly precipitation dataset with 2.5 degrees latitude-longitude resolution is generated in this paper using spectral optimal gridding (SOG...

  • Avery M.S, Constable C.G, Davies CJ, Gubbins D.  2019.  Spectral methods for analyzing energy balances in geodynamo simulations. Physics of the Earth and Planetary Interiors. 286:127-137.
    Abstract Summary:

    The geomagnetic field displays complicated variations over a broad range of frequencies. These variations can be decomposed by frequency and linked to physical processes using frequency domain spectral methods. These spectral methods are well developed but have not previously been applied to study the energy balance of geodynamo simulations. We illustrate their potential by analyzing output from numerical dynamo simulations that have...

  • Peters B.J, Shahar A., Carlson R.W, Day JMD, Mock T.D.  2019.  A sulfide perspective on iron isotope fractionation during ocean island basalt petrogenesis. Geochimica Et Cosmochimica Acta. 245:59-78.
    Abstract Summary:

    Iron isotopic compositions are demonstrably powerful tracers of foundational planetary processes, including crust and core formation. In many volcanic environments, however, geochemical vestiges of these processes are obscured by the effects of magmatic differentiation on Fe isotopic compositions. Recent decades have witnessed continued refinement of observational and experimental approaches to Fe isotope fractionation during silicate...

  • Cimino M.A, Anderson M., Schramek T., Merrifield S., Terrill E.J.  2019.  Towards a fishing pressure prediction system for a Western Pacific EEZ. Scientific Reports. 9
    Abstract Summary:

    Fisheries management faces numerous monitoring and enforcement challenges that are becoming more complex as fish stocks are depleted; and illegal, unregulated, and unreported fishing becomes more sophisticated. For remote island nations, the challenges are compounded by a loosely understood association of pelagic stocks to the ocean environment, and the tyranny of distance in monitoring and surveilling large exclusive economic zones (EEZ). An...

  • Silverii F., D'Agostino N., Borsa A.A, Calcaterra S., Gambino P., Giuliani R., Mattone M..  2019.  Transient crustal deformation from karst aquifers hydrology in the Apennines (Italy). Earth and Planetary Science Letters. 506:23-37.
    Abstract Summary:

    The increasing accuracy and spatiotemporal resolution of space geodetic techniques have positively impacted the study of shallow crustal deformation in response to the redistribution of water masses. Measurable deformations have been documented in areas where snow and water variability is large and persists over sufficiently long periods. Here we analyze GPS time series and hydrological data from the Central-Southern Apennines, a tectonically...

  • Stock B.C, Ward E.J, Thorson J.T, Jannot J.E, Semmens B.X.  2019.  The utility of spatial model-based estimators of unobserved bycatch. Ices Journal of Marine Science. 76:255-267.
    Abstract Summary:

    Quantifying effects of fishing on non-targeted (bycatch) species is an important management and conservation issue. Bycatch estimates are typically calculated using data collected by on-board observers, but observer programmes are costly and therefore often only cover a small percentage of the fishery. The challenge is then to estimate bycatch for the unobserved fishing activity. The status quo for most fisheries is to assume the ratio of...

  • McAlpine J.B, Chen S.N, Kutateladze A., MacMillan J.B, Appendino G., Barison A., Beniddir M.A, Biavatti M.W, Bluml S., Boufridi A. et al..  2019.  The value of universally available raw NMR data for transparency, reproducibility, and integrity in natural product research. Natural Product Reports. 36:35-107.
    Abstract Summary:

    With contributions from the global natural product (NP) research community, and continuing the Raw Data Initiative, this review collects a comprehensive demonstration of the immense scientific value of disseminating raw nuclear magnetic resonance (NMR) data, independently of, and in parallel with, classical publishing outlets. A comprehensive compilation of historic to present-day cases as well as contemporary and future applications show...

  • Hill GE, Havird JC, Sloan DB, Burton RS, Greening C, Dowling DK.  2018.  Assessing the fitness consequences of mitonuclear interactions in natural populations.
    Abstract Summary:

    Metazoans exist only with a continuous and rich supply of chemical energy from oxidative phosphorylation in mitochondria. The oxidative phosphorylation machinery that mediates energy conservation is encoded by both mitochondrial and nuclear genes, and hence the products of these two genomes must interact closely to achieve coordinated function of core respiratory processes. It follows that selection for efficient respiration will lead to...

  • Highlighted Publication
    Dayton PK, Jarrell SC, Kim S, Parnell P.E, Thrush S.F, Hammerstrom K, Leichter J.J.  2019.  Benthic responses to an Antarctic regime shift: food particle size and recruitment biology. Ecological Applications. 29
    Abstract Summary:

    Polar ecosystems are bellwether indicators of climate change and offer insights into ecological resilience. In this study, we describe contrasting responses to an apparent regime shift of two very different benthic communities in McMurdo Sound, Antarctica. We compared species-specific patterns of benthic invertebrate abundance and size between the west (low productivity) and east (higher productivity) sides of McMurdo Sound across multiple...

  • Kearney S.E, Zahoranszky-Kohalmi G., Brimacombe K.R, Henderson M.J, Lynch C., Zhao T.G, Wan K.K, Itkin Z., Dillon C., Shen M. et al..  2018.  Canvass: A crowd-sourced, natural-product screening library for exploring biological space. 4:1727-1741.
    Abstract Summary:

    Natural products and their derivatives continue to be wellsprings of nascent therapeutic potential. However, many laboratories have limited resources for biological evaluation, leaving their previously isolated or synthesized compounds largely or completely untested. To address this issue, the Canvass library of natural products was assembled, in collaboration with academic and industry researchers, for quantitative high-throughput screening...

  • Abstract Summary:

    Although the light fields and apparent optical properties (AOPs) within the ocean euphotic layer have been studied for many decades through extensive measurements and theoretical modeling, there is virtually a lack of simultaneous high spectral resolution measurements of plane and scalar downwelling and upwelling irradiances (the so-called irradiance quartet). We describe a unique dataset of hyperspectral irradiance quartet, which was...

  • Ulate K., Alcoverro T., Arthur R., Aburto-Oropeza O, Sanchez C., Huato-Soberanis L..  2018.  Conventional MPAs are not as effective as community co-managed areas in conserving top-down control in the Gulf of California. Biological Conservation. 228:100-109.
    Abstract Summary:

    While undeniably successful in protecting nearshore marine ecosystems from overfishing, conventional marine reserves often impinge on the livelihoods of dependent coastal communities. Community co-managed areas may guarantee considerably more equity, but it is unclear if they can be as effective as conventional reserves in conserving critical trophic functions. We evaluated the effectiveness of different management regimes in the Gulf of...